CN206294073U - Power supply device - Google Patents
Power supply device Download PDFInfo
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- CN206294073U CN206294073U CN201621202620.4U CN201621202620U CN206294073U CN 206294073 U CN206294073 U CN 206294073U CN 201621202620 U CN201621202620 U CN 201621202620U CN 206294073 U CN206294073 U CN 206294073U
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Abstract
The utility model provides a power supply unit, including charge pump, feedback circuit and control circuit. The charge pump is controlled by the control signal group to generate a charging current during the charging period to charge the capacitor. The charge pump is controlled by the control signal group to generate a pumping current during the pumping period so as to transfer charges of the direct current input power supply and the capacitor to the output end to provide a direct current output voltage. The feedback circuit detects the relation between the DC output voltage and the reference voltage and correspondingly outputs an error signal. The control circuit detects a load change of the power supply device according to the error signal and generates a control signal group. The control signal group determines one of the current value of the charging current and the current value of the pumping current, or determines at least one of the time length of the charging period and the time length of the pumping period. The utility model discloses can reduce ripples and electromagnetic interference, improve conversion efficiency.
Description
Technical field
The utility model is related to a kind of power supply circuit, more particularly to a kind of power supply dress with high-effect and low chain ripple
Put.
Background technology
In an electronic, power supply circuit can supply electric energy needed for operating.For example, charge pump direct current-straight
DC input voitage can be converted to VD by stream transformer (charge pump DC-DC converter), with
Just the DC voltage of supply varying level is to load circuit.Wherein, in the charge pump DC-to-dc converter of suitching type, it is
It is to use handoff technique, after first DC input voitage is charged to an electric capacity, then by DC input voitage and this electric capacity
Stored electric charge transfer to output end, to provide the VD of stabilization to load circuit.
However, the most common problem of charge pump DC-to-dc converter of general fixed frequency operation is：When load circuit transition
Or when disturbing, VD can also fluctuate and fluctuations therewith producing.That is, charge pump DC-to-dc
When transition is loaded, its VD for being exported has very important ripple to converter.In addition, suitching type
Charge pump DC-to-dc converter in power transistor be to be switched between saturation region and cut-off region.Due to work(
Rate transistor operation has very important cross-pressure at saturation region between its drain electrode end and source terminal, this cross-pressure will lead
Cause the conversion efficiency reduction of charge pump DC-to-dc converter.
On the other hand, (Pulse Frequency Modulation are become using the arteries and veins frequency modulation for determining electric current output；PFM) formula electricity
Lotus pump DC-to-dc converter, its temporal variations that may be in response to load circuit and the accordingly frequency of regulating switch control signal
Rate, to improve conversion efficiency.However, the characteristic of its frequency conversion easily produces electromagnetic interference (Electro Magnetic
Interference, EMI) problem, be especially for use in when in display device, be easily caused the picture shown by display device and go out
Existing water ripples, and reduce display quality.
Utility model content
In view of this, the utility model provides a kind of electric supply installation adopted and determine frequency operation, and it can be fitted according to the change of load
Modulation charging current or electric current is taken out to answering property, or time span during adaptively modulation charges or the time during taking out electricity
Length, uses reduction ripple and electromagnetic interference, and can improve conversion efficiency.
Electric supply installation of the present utility model is used to for the DC input voitage of direct-current input power supplying to be converted to direct current output electricity
Pressure.Electric supply installation may include charge pump, feedback circuit and control circuit.Charge pump includes the first electric capacity.Charge pump is controlled by
Control signal group and charging current is produced during charging, with to the first electric capacity charge.Charge pump be controlled by control signal group and
During electricity is taken out produce take out electric current, by the output end of the electric charge transfer of direct-current input power supplying and the first electric capacity to charge pump with
VD is provided.Feedback circuit couples the output end of charge pump to receive VD.Feedback circuit is used to examine
Survey the relation of VD and reference voltage and accordingly export the first error signal or pulse signal.Control circuit coupling
The output end of feedback circuit is examined with receiving the first error signal or pulse signal according to the first error signal or pulse signal
The load for surveying electric supply installation changes and produces control signal group, and wherein control signal group is configured to determine the electric current of charging current
It is worth and takes out one of current value of electric current, or, control signal group is configured to determine the time span during charging
And the time span during taking out electricity at least one.
In an embodiment of the present utility model, above-mentioned charge pump also includes charge switch circuit, takes out electric switch circuit
And output capacitance.The first end of charge switch circuit is used to receive DC input voitage.Second end coupling of charge switch circuit
Connect the first end of the first electric capacity.3rd end of charge switch circuit couples the second end of the first electric capacity.The of charge switch circuit
Four ends couple ground voltage terminal.Charge switch circuit is controlled by control signal group to produce charging current during charging, with right
First electric capacity charges.The first end for taking out electric switch circuit is used to receive DC input voitage.Take out the second end coupling of electric switch circuit
Connect the second end of the first electric capacity.The 3rd end for taking out electric switch circuit couples the first end of the first electric capacity.Take out the of electric switch circuit
Four ends couple the output end of charge pump.Take out electric switch circuit and be controlled by control signal group, electric electric current is taken out to be provided during electricity is taken out
With the output end of VD to charge pump.Output capacitance is coupled between the output end of charge pump and ground voltage terminal.
In an embodiment of the present utility model, above-mentioned control signal group includes that control voltage, the first electric current, charging are opened
OFF signal and take out and establish OFF signal by cable.Control circuit includes clock generating circuit, amplifying circuit, selection circuit and current source electricity
Road.Clock generating circuit is used to produce charge switch signal and take out establish OFF signal by cable, and wherein charge switch signal and taking out is established by cable
The frequency of OFF signal is fixed frequency.Amplifying circuit is used to receive the first error signal and sensing voltage, and the first error is believed
Number and sensing voltage between difference amplify, to produce the second error voltage.The control end of selection circuit is used to receive charging to be opened
OFF signal is taken out and establishes OFF signal by cable.The first input end of selection circuit is used to receive DC input voitage.The second of selection circuit
Input is used to receive the second error voltage.The output end of selection circuit is used to output control voltage.Selection circuit is according to charging
Switching signal is taken out and establishes OFF signal by cable and select one as control voltage in DC input voitage and the second error voltage two.Current source
Circuit is coupled between selection circuit and wherein one end of the first electric capacity.Current source circuit receives DC input voitage, and controlled
The first electric current and sensing voltage are produced during charging or during taking out electricity in control voltage, wherein the first electric current determines the electricity that charges
Electric current is flowed or takes out, and sensing voltage follows the trail of the first error signal.
In an embodiment of the present utility model, the selection circuit is according to the charge switch signal in the charging
Period exports the DC input voitage as the control voltage, and the selection circuit is according to the charge switch signal
And during the charging beyond time interval export second error voltage as the control voltage, wherein described
Selection circuit includes the 5th P-type transistor, and the source terminal of the 5th P-type transistor couples described the first of the selection circuit
Input, the gate terminal of the 5th P-type transistor couples the control end of the selection circuit, and the 5th p-type is brilliant
The drain electrode end of body pipe couples second input and the output end of the selection circuit.
In an embodiment of the present utility model, the electric switch circuit of taking out includes：First P-type transistor, a P
The source terminal of transistor npn npn is used to receive the DC input voitage, the drain electrode end coupling of first P-type transistor described the
Second end of one electric capacity, and the gate terminal of first P-type transistor is used to receive the control voltage, wherein described
One P-type transistor it is described take out electricity during operate in linear zone, described take out electricity accordingly to adjust based on first electric current
The current value of electric current；And second P-type transistor, the source terminal of second P-type transistor couples the described of the charge pump
Output end, the drain electrode end of second P-type transistor couples the first end of first electric capacity, and second p-type is brilliant
The gate terminal of body pipe is used to receive anti-phase described taking out and establishes OFF signal by cable, wherein the charge switch circuit includes：3rd p-type is brilliant
Body pipe, the source terminal of the 3rd P-type transistor is used to receive the DC input voitage, the leakage of the 3rd P-type transistor
The first end of first electric capacity is extremely coupled, and the gate terminal of the 3rd P-type transistor is used to receive anti-phase institute
State charge switch signal；And first N-type transistor, the source terminal of first N-type transistor couples the ground voltage terminal,
The drain electrode end of first N-type transistor couples second end of first electric capacity, and first N-type transistor grid
Extremely it is used to receive the charge switch signal.
In an embodiment of the present utility model, the selection circuit is taken out according to and establishes OFF signal by cable and take out electricity in described
Period exports the DC input voitage and is taken out according to and establish OFF signal by cable as the control voltage, and the selection circuit
And in it is described take out electricity during beyond time interval export second error voltage as the control voltage, wherein described
Selection circuit includes the 5th P-type transistor, and the source terminal of the 5th P-type transistor couples described the first of the selection circuit
Input, the gate terminal of the 5th P-type transistor couples the control end of the selection circuit, and the 5th p-type is brilliant
The drain electrode end of body pipe couples second input and the output end of the selection circuit.
In an embodiment of the present utility model, the electric switch circuit of taking out includes：First P-type transistor, a P
The source terminal of transistor npn npn is used to receive the DC input voitage, the drain electrode end coupling of first P-type transistor described the
Second end of one electric capacity, and the gate terminal of first P-type transistor is used to receive anti-phase described taking out and establishes OFF signal by cable；
And second P-type transistor, the source terminal of second P-type transistor couples the output end of the charge pump, and described the
The drain electrode end of two P-type transistors couples the first end of first electric capacity, and the gate terminal of second P-type transistor is used
With receive it is anti-phase described in take out and establish OFF signal by cable, wherein the charge switch circuit includes：3rd P-type transistor, the 3rd P
The source terminal of transistor npn npn is used to receive the DC input voitage, the drain electrode end coupling of the 3rd P-type transistor described the
The first end of one electric capacity, and the gate terminal of the 3rd P-type transistor is used to receive the control voltage, wherein described
Three P-type transistors are operated in linear zone during the charging, and the charging is accordingly adjusted with based on first electric current
The current value of electric current；And first N-type transistor, the source terminal of first N-type transistor couples the ground voltage terminal, institute
The drain electrode end for stating the first N-type transistor couples second end of first electric capacity, and first N-type transistor grid
End is used to receive the charge switch signal.
In an embodiment of the present utility model, the amplifying circuit includes operational amplifier, wherein the operation amplifier
The inverting input of device is used to receive first error signal, and the non-inverting input of the operational amplifier is used to receive institute
Sensing voltage is stated, and the output end of the operational amplifier exports second error voltage；The current source circuit includes：The
Four P-type transistors, the source terminal of the 4th P-type transistor is used to receive the DC input voitage, the 4th P-type crystal
The gate terminal of pipe is used to receive the control voltage, and the drain electrode end of the 4th P-type transistor exports first electric current, its
Described in the 4th P-type transistor it is described take out electricity during or the charging during operate in linear zone；Voltage follower, the electricity
The first input end of follower is pressed to couple the drain electrode end of the 4th P-type transistor to receive first electric current, the voltage
Second input of follower couples wherein one end of first electric capacity, and the output end transmission of the voltage follower is described
First electric current；And resistance is sensed, the sensing resistance is coupled in the output end of the voltage follower and the ground connection
Between voltage end, it is used to react on first electric current and produce the sensing voltage.
In an embodiment of the present utility model, the voltage follower includes：Operational amplifier, the operational amplifier
Non-inverting input couple second input of the voltage follower, the inverting input coupling of the operational amplifier
Connect the first input end of the voltage follower；Second N-type transistor, the gate terminal coupling of second N-type transistor
The output end of the operational amplifier, the drain electrode end of second N-type transistor couples described the first of the voltage follower
Input, the source terminal of second N-type transistor couples the output end of the voltage follower；And second electric capacity,
The first end of second electric capacity couples the output end of the operational amplifier, and the second end of second electric capacity couples
The ground voltage terminal.
In an embodiment of the present utility model, the feedback circuit includes：Bleeder circuit, is coupled in the charge pump
Between the output end and ground voltage terminal, it is used to the VD is carried out partial pressure to produce feedback voltage；Computing
Amplifier, the inverting input of the operational amplifier is used to receive the feedback voltage, the operational amplifier it is noninverting
Input is used to receive the reference voltage, and the output end of the operational amplifier is used to output error result；And compensation
Circuit, is coupled between the output end of the operational amplifier and the ground voltage terminal, is used to the error result
Compensate to produce first error signal.
In an embodiment of the present utility model, above-mentioned control signal group includes charge switch signal and takes out electric switch
Signal.Control circuit includes latch circuit, frequency tracking control circuit, clock generating circuit and fixed current controling circuit.Door bolt
The first input end of lock circuit is used to receive and latch pulse signal, to produce clock pulse control signal.Frequency tracking controls circuit
Input coupling latch circuit output end receiving clock pulse control signal.Frequency tracking control circuit is used to detect clock pulse control
Signal processed and know electric supply installation load change, and according to load change come control latch circuit with correspondence adjustment clock pulse control
The work period of signal.Clock generating circuit is used to produce charge switch signal to establish OFF signal by cable with taking out.Clock generating circuit
The output end of input coupling latch circuit adjusts the work period of charge switch signal according to this to receive clock pulse control signal
Or take out the work period for establishing OFF signal by cable.Fixed current controling circuit couples clock generating circuit to receive charge switch signal or take out
Establish OFF signal by cable.Fixed current controling circuit produces the first electric current according to charge switch signal during electricity is taken out, and provides control
Voltage is caused to take out electric switch circuit and produce and fixed takes out electric current to electric switch circuit is taken out.Or, fixed current controling circuit root
Establish OFF signal by cable and the first electric current is produced during charging according to taking out, and control voltage to charge switch circuit is provided, cause charging
On-off circuit produces fixed charging current.
In an embodiment of the present utility model, the fixed current controling circuit includes：Amplifying circuit, is used to receive setting
Voltage and sensing voltage, and the difference between the setting voltage and the sensing voltage is amplified, to produce the second error electricity
Pressure；Selection circuit, the control end of the selection circuit is used to receive the charge switch signal or described taking out establishes OFF signal by cable, institute
The first input end for stating selection circuit is used to receive the DC input voitage, and the second input of the selection circuit is used to connect
Second error voltage is received, and the output end of the selection circuit is used to export the control voltage, wherein the selection electricity
Road OFF signal is established by cable in the DC input voitage and second error voltage according to the charge switch signal or described taking out
One of them is used as the control voltage；And current source circuit, it is coupled in its of the selection circuit and first electric capacity
Between middle one end, the current source circuit receives the DC input voitage, and is controlled by the control voltage and is filled in described
During electricity or it is described take out electricity during produce first electric current and the sensing voltage, wherein first electric current determine described in fill
Electric current or it is described take out electric current, and the sensing voltage follows the trail of the setting voltage.
In an embodiment of the present utility model, the latch circuit includes：SR latch units, with setting end, reset end,
Positive output end and reversed-phase output, wherein the first input end of the setting end as the latch circuit, described heavy
Put end and be controlled by the frequency tracking control circuit, the positive output end exports to the clock pulse clock pulse control signal
Produce circuit and frequency tracking control circuit.
In an embodiment of the present utility model, the frequency tracking control circuit includes：Phase-frequency detector, it is described
The first input end of phase-frequency detector couples the output end of the latch circuit to receive the clock pulse control signal,
Second input of the phase-frequency detector is used to receive and refers to clock signal, the output end of the phase-frequency detector
It is used to provide detection voltage, the phase-frequency detector is used to detect the clock pulse control signal with the reference clock signal
Phase relation or frequency relation and obtain the detection voltage；And clock pulse adjustment circuit, the clock pulse adjustment circuit it is defeated
Enter the output end of the end coupling phase-frequency detector to receive the detection voltage and produce sawtooth waveforms according to this, wherein
The slope of the sawtooth waveforms is controlled by the detection voltage, when the magnitude of voltage of the sawtooth waveforms reaches critical voltage, institute
State clock pulse adjustment circuit and provide reset signal to the replacement end of the SR latch units, to adjust the clock pulse control signal
The work period.
In an embodiment of the present utility model, the clock pulse adjustment circuit includes：Voltage-current conversion circuit, the voltage
The input for turning current circuit receives the detection voltage, and the detection voltage is converted into detection electric current；4th electric capacity, institute
The first end for stating the 4th electric capacity couples the output end of the Voltage-current conversion circuit, and the second end coupling of the 4th electric capacity is described
Ground voltage terminal；Switch, the first end of the switch couples the output end of the Voltage-current conversion circuit, the switch
Second end couples the ground voltage terminal, and the control end of the switch couples the reversed-phase output of the SR latch units；
And comparator, the inverting input reception critical voltage of the comparator, the non-inverting input coupling of the comparator
The first end of the 4th electric capacity is connect, and the output end of the comparator couples the replacement end of the SR latch units.
In an embodiment of the present utility model, the feedback circuit includes：Bleeder circuit, is coupled in the charge pump
Between the output end and ground voltage terminal, it is used to the VD is carried out partial pressure to produce feedback voltage；Compare
Device, the inverting input of the comparator is used to receive the feedback voltage, and the non-inverting input of the comparator is used to connect
The reference voltage is received, and the output end of the comparator is used to export the pulse signal.
Based on above-mentioned, the electric supply installation of the utility model embodiment can adaptively modulation charges electricity according to the change of load
Time span during flowing or take out electric current or charging or the time span during taking out electricity, therefore when transition is loaded, it is possible to decrease it is straight
Ripple on stream output voltage.Additionally, the electric supply installation of the utility model embodiment is operated for fixed frequency, therefore electromagnetism can be reduced and done
Disturb.
It is that features described above of the present utility model and advantage can be become apparent, special embodiment below, and coordinate accompanying drawing
It is described in detail below.
Brief description of the drawings
Show
Fig. 1 is the circuitry block schematic diagram according to the electric supply installation shown by the embodiment of the utility model one；
Fig. 2 is according to the charge pump shown in first embodiment explanatory diagram 1 of the present utility model, feedback circuit and control electricity
The circuit framework schematic diagram on road；
Fig. 3 is according to the charge pump shown in second embodiment explanatory diagram 1 of the present utility model, feedback circuit and control electricity
The circuit framework schematic diagram on road；
Fig. 4 is according to the charge pump shown in 3rd embodiment explanatory diagram 1 of the present utility model, feedback circuit and control electricity
The circuit framework schematic diagram on road；
Fig. 5 is according to the charge pump shown in fourth embodiment explanatory diagram 1 of the present utility model, feedback circuit and control electricity
The circuit framework schematic diagram on road.
Reference：
100：Electric supply installation；
120：Charge pump；
140：Feedback circuit；
160：Control circuit；
222：Charge switch circuit；
224：Take out electric switch circuit
242：Bleeder circuit；
244：Compensation circuit；
261、461：Clock generating circuit；
262：Amplifying circuit；
263：Selection circuit；
264：Current source circuit；
2640：Voltage follower；
466：Latch circuit；
4662：SR latch units；
467：Frequency tracking controls circuit；
4672：Phase-frequency detector；
4674：Clock pulse adjustment circuit；
468：Fixed current controling circuit；
C1：First electric capacity；
C2：Second electric capacity；
C3：3rd electric capacity；
C4：4th electric capacity；
CKR：With reference to clock signal；
CMP3、CMP4：Comparator
CO：Output capacitance；
CS：Charge switch signal；
CSB：Anti-phase charge switch signal；
GND：Ground voltage terminal；
I1：First electric current；
I21、I22、I23、I24、I41、I42、I43、I44：End；
Ic：Charging current；
IFTC：Detection electric current；
Ip：Take out electric current；
MN1、MN2：N-type transistor；
MP1、MP2、MP3、MP4、MP5：P-type transistor；
OP1、OP2、OP3：Operational amplifier；
Q：Positive output end；
QB：Reversed-phase output；
PI：Direct-current input power supplying；
PS：Take out and establish OFF signal by cable；
PSB：OFF signal is established in anti-phase taking out by cable；
R：Reset end；
R1、R2、R3：Resistance；
RE：Reset signal；
RS：Sensing resistance；
S：Setting end；
SCG：Control signal group；
SCK：Clock pulse control signal；
SCKB：Anti-phase clock pulse control signal；
SW：Switch；
V1：First voltage；
V2：Second voltage；
VCCS：Control voltage；
VE1：First error signal；
VE2：Second error voltage；
VPu:Pulse signal；
VFB：Feedback voltage；
VFTC：Detection voltage；
VFX：Setting voltage；
VI：DC input voitage；
VIC：Voltage-current conversion circuit；
VO：VD；
VR：Reference voltage；
VRS：Sensing voltage；
VSAW：Sawtooth waveforms；
VT：Critical voltage.
Specific embodiment
In order that content of the present utility model can easily be understood, it is true as the utility model especially exemplified by embodiment below
The example that can implement according to this in fact.In addition, all possible parts, use the element/structure of identical label in drawings and the embodiments
Part, is to represent same or like part.
Fig. 1 is below refer to, Fig. 1 is the circuit side according to the electric supply installation 100 shown by the embodiment of the utility model one
Frame schematic diagram.Electric supply installation 100 may be used to for the DC input voitage VI of direct-current input power supplying PI to be converted to VD
VO.Electric supply installation 100 may include charge pump 120, feedback circuit 140 and control circuit 160.Charge pump 120 can include first
Electric capacity C1.Charge pump 120 can be controlled by control signal group SCG and charging current is produced during charging, with to the first electric capacity C1
Charge.Charge pump 120 can be controlled by control signal group SCG and be produced during electricity is taken out and take out electric current, by direct-current input power supplying
The electric charge transfer of PI and the first electric capacity C1 is to the output end of charge pump 120 providing VD VO.
Feedback circuit 140 couples the output end of charge pump 120 to receive VD VO.Feedback circuit 140 is used to
Detect the relation of VD VO and reference voltage VR and accordingly export the first error signal VE1.
The output end of the control coupling feedback circuit 140 of circuit 160 is missed with receiving the first error signal VE1 according to first
Difference signal VE1 and detect the load of electric supply installation 100 and change and produce control signal group SCG.Implement of the present utility model one
In example, control signal group SCG can determine the current value of above-mentioned charging current.In another embodiment of the present utility model, control
Signal group SCG can determine the above-mentioned current value for taking out electric current.In another embodiment of the present utility model, control signal group SCG
Can determine the time span during above-mentioned charging or it is above-mentioned take out electricity during time span.Below for above-mentioned each embodiment
It is described in detail.
It is according to the charge pump shown in embodiment explanatory diagram 1 of the present utility model referring to Fig. 1 and Fig. 2, Fig. 2
120th, the circuit framework schematic diagram of feedback circuit 140 and control circuit 160.As shown in Fig. 2 charge pump 120 may include first
Electric capacity C1, charge switch circuit 222, take out electric switch circuit 224 and output capacitance CO.Output capacitance CO is coupled in charge pump
Between 120 output end and ground voltage terminal GND
The first end I21 of charge switch circuit 222 is used to receive DC input voitage VI.The of charge switch circuit 222
Two end I22 couple the first end of the first electric capacity C1.3rd end I23 of charge switch circuit 222 couples the second of the first electric capacity C1
End.4th end I24 of charge switch circuit 222 is coupled to ground voltage terminal GND.Charge switch circuit 222 is controlled by control letter
Number group SCG is charged with producing charging current Ic during charging with to the first electric capacity C1.
The first end I41 for taking out electric switch circuit 224 is used to receive DC input voitage VI.Take out the of electric switch circuit 224
Two end I42 couple second end of the first electric capacity C1.The 3rd end I43 for taking out electric switch circuit 224 couples the first of the first electric capacity C1
End.The 4th end I44 for taking out electric switch circuit 224 couples the output end of charge pump 120.Taking out electric switch circuit 224 can be controlled by control
Signal group SCG processed, the output end of electric current Ip and VD VO to charge pump 120 is taken out to be provided during electricity is taken out.
In the present embodiment, the control signal group SCG produced by control circuit 160 includes that control voltage VCCS, the first electric current I1, charging are opened
OFF signal CS (or anti-phase charge switch signal CSB) and take out and establish OFF signal PS (or OFF signal PSB is established in anti-phase taking out by cable) by cable.
For further, taking out electric switch circuit 224 may include P-type transistor MP1 and P-type transistor MP2, wherein p-type
Transistor MP1 and P-type transistor MP2 can be p-type metal-oxide half field effect transistor (MOSFET), but the utility model not as
Limit.In other embodiment of the present utility model, taking out electric switch circuit 224 also can be using N-type metal-oxide half field effect transistor come real
It is existing, hold depending on practical application or design requirement.The source terminal of P-type transistor MP1 is used to receive DC input voitage VI.P-type
The drain electrode end of transistor MP1 couples second end of the first electric capacity C1.The gate terminal of P-type transistor MP1 is used to receive control voltage
VCCS.Specifically, P-type transistor MP1 be during electricity is taken out operation in linear zone, with based on the first electric current I1 accordingly
The current value of electric current Ip is taken out in adjustment, can be described in detail after a while.The source terminal coupling charge pump 120 of P-type transistor MP2
Output end.The drain electrode end of P-type transistor MP2 couples the first end of the first electric capacity C1.The gate terminal of P-type transistor MP2 is used to connect
Receive anti-phase taking out and establish OFF signal PSB by cable.
On the other hand, charge switch circuit may include P-type transistor MP3 and N-type transistor MN1, wherein P-type transistor
MP3 can be p-type metal-oxide half field effect transistor, and N-type transistor MN1 can be N-type metal-oxide half field effect transistor, but the utility model
It is not limited thereto, holds depending on practical application or design requirement.The source terminal of P-type transistor MP3 is used to receive direct current input
Voltage VI.The drain electrode end of P-type transistor MP3 couples the first end of the first electric capacity C1.The gate terminal of P-type transistor MP3 is used to connect
Receive anti-phase charge switch signal CSB.The source terminal of N-type transistor MN1 is coupled to ground voltage terminal GND.N-type transistor MN1
Drain electrode end couple the first electric capacity C1 the second end.The gate terminal of N-type transistor MN1 is used to receive charge switch signal CS.
Feedback circuit 140 may include bleeder circuit 242, operational amplifier OP3 and compensation circuit 244.Bleeder circuit 242
It is coupled between the output end of charge pump 120 and ground voltage terminal GND, is used to VD VO is carried out partial pressure to produce
Feedback voltage V FB.The inverting input of operational amplifier OP3 is used to receive feedback voltage V FB.Operational amplifier OP3's is non-anti-
Phase input is used to receive reference voltage VR.The output end of operational amplifier OP3 is used to output error result.Compensation circuit 244
It is coupled between the output end of operational amplifier OP3 and ground voltage terminal GND, is used to compensate above-mentioned error result produce
Raw first error signal VE1.
In an embodiment of the present utility model, as shown in Fig. 2 bleeder circuit 242 may include resistance R2 and resistance R3, its
Middle resistance R2 and resistance R3 are serially connected between the output end of charge pump 120 and ground voltage terminal GND.Compensation circuit 244 may include
Resistance R1 and the 3rd electric capacity C3, wherein resistance R1 and the 3rd electric capacity C3 are serially connected in the output end and ground connection electricity of operational amplifier OP3
Between pressure side GND.
Control circuit 160 may include clock generating circuit 261, amplifying circuit 262, selection circuit 263 and current source electricity
Road 264.Clock generating circuit 261 is used to produce charge switch signal CS (or anti-phase charge switch signal CSB) and takes out electricity
Switching signal PS (or OFF signal PSB is established in anti-phase taking out by cable), wherein charge switch signal CS and take out the frequency for establishing OFF signal PS by cable
Can be a fixed frequency, and it is also fixed that charge switch signal CS and taking out establishes work period (duty cycle) of OFF signal PS by cable
It is worth, but the utility model is not limited thereto.Clock generating circuit 261 can be existing clock pulse generator, therefore repeat no more.
Amplifying circuit 262 may be used to receive the first error signal VE1 and sensing voltage VRS, and by the first error signal VE1
Amplify with the difference between sensing voltage VRS, to produce the second error voltage VE2.In an embodiment of the present utility model, such as
Shown in Fig. 2, amplifying circuit 262 may include operational amplifier OP1.The inverting input of operational amplifier OP1 is used to receive first
Error signal VE1.The non-inverting input of operational amplifier OP1 is used to receive sensing voltage VRS.Operational amplifier OP1's is defeated
Go out the second error voltage VE2 of end output.
The control end of selection circuit 263 is used to receive charge switch signal CS (or anti-phase charge switch signal CSB, end
Depending on practical application or design requirement).The first input end of selection circuit 263 is used to receive DC input voitage VI.Selection
Second input of circuit 263 is used to receive the second error voltage VE2.The output end of selection circuit 263 is to output control electricity
Pressure VCCS.Selection circuit 263 can be input into electricity according to charge switch signal CS (or anti-phase charge switch signal CSB) in direct current
One of VI and the second error voltage VE2 are used as control voltage VCCS for pressure.For further, selection circuit 263 can basis
Charge switch signal CS (or anti-phase charge switch signal CSB) and during charging export DC input voitage VI as control
Voltage VCCS processed, and forbidden energy current source circuit 264.Selection circuit 263 can (or anti-phase charging be opened according to charge switch signal CS
OFF signal CSB) and during charging beyond time interval (such as during taking out electricity) export the second error voltage VE2 as control
Voltage VCCS processed, so that current source circuit 264 produces the first electric current I1.
In an embodiment of the present utility model, as shown in Fig. 2 selection circuit 263 may include P-type transistor MP5, p-type
Transistor MP5 can be p-type metal-oxide half field effect transistor, but the utility model is not limited thereto.It is of the present utility model other
In embodiment, selection circuit 263 can also be realized using N-type metal-oxide half field effect transistor, depending on practical application or design requirement
It is fixed.The source terminal of P-type transistor MP5 couples the first input end of selection circuit 263 to receive DC input voitage VI.P-type is brilliant
The gate terminal of body pipe MP5 couples the control end of selection circuit 263 to receive anti-phase charge switch signal CSB.P-type transistor
Second input and output end of drain electrode end coupling selection circuit 263.
Current source circuit 264 is coupled between second end of the output end of selection circuit 263 and the first electric capacity C1.Current source
Circuit 264 receives DC input voitage VI, and is controlled by control voltage VCCS and the first electric current I1 is produced during electricity is taken out with sense
Voltage VRS is surveyed, wherein the first electric current I1 can determine to take out electric current Ip, and sensing voltage VRS follows the trail of the first error signal VE1.More
Furthermore, it is understood that as shown in Fig. 2 current source circuit 264 may include P-type transistor MP4 and voltage follower 2640 and sense
Measuring resistance RS.The source terminal of P-type transistor MP4 is used to receive DC input voitage VI.The gate terminal of P-type transistor MP4 is used to
Receive control voltage VCCS.The drain electrode end of P-type transistor MP4 exports the first electric current I1.P-type transistor MP4 is grasped during electricity is taken out
Make in linear zone.
The first input end of voltage follower 2640 couples the drain electrode end of P-type transistor MP4 to receive the first electric current I1.Electricity
Press second end of the first electric capacity C1 of the second input coupling of follower 2640.The output end transmission first of voltage follower 2640
Electric current I1 to sensing resistance RS.Sensing resistance RS is coupled between the output end of voltage follower 2640 and ground voltage terminal GND,
It is used to react on the first electric current I1 and produce sensing voltage VRS to feed back to the non-inverting input of operational amplifier OP1, so that
The traceable first error signal VE1 of sensing voltage VRS.The characteristic of the first error signal VE1 is followed the trail of based on sensing voltage VRS, the
The current value of one electric current I1 is substantially the resistance value of the magnitude of voltage divided by sensing voltage VRS of the first error signal VE1.
In an embodiment of the present utility model, as shown in Fig. 2 voltage follower 2640 may include operational amplifier OP2,
N-type transistor MN2 and the second electric capacity C2.The of the non-inverting input coupling voltage follower 2640 of operational amplifier OP2
Two inputs.The inverting input of operational amplifier OP2 couples the first input end of voltage follower 2640.N-type transistor MN2
Gate terminal coupling operational amplifier OP2 output end.The of the drain electrode end coupling voltage follower 2640 of N-type transistor MN2
One input.The source terminal of N-type transistor MN2 couples the output end of voltage follower 2640.The first end coupling of the second electric capacity C2
Connect the output end of operational amplifier OP2.Second end of the second electric capacity C2 couples ground voltage terminal GND.
The running of charge pump 120, feedback circuit 140 and control circuit 160 below for Fig. 2 is illustrated.When
Arteries and veins produce circuit 261 provide charge switch signal CS (or anti-phase charge switch signal CSB) and take out establish by cable OFF signal PS (or
OFF signal PSB is established in anti-phase taking out by cable), the enable of wherein charge switch signal CS is interval and takes out the enable interval for establishing OFF signal PS by cable
Non-overlapping copies, thus charge switch circuit 222 (i.e. P-type transistor MP1, P-type transistor MP2) with take out electric switch circuit 224 (i.e.
P-type transistor MP3 and N-type transistor MN1) will not simultaneously turn on.
During charging, clock generating circuit 261 can provide charge switch signal CS (or the disabled state of enabled status
Anti-phase charge switch signal CSB) and taking out for disabled state establish OFF signal PS by cable (or electric switch taken out in the anti-phase of enabled status
Signal PSB), therefore P-type transistor MP2 is cut off, and N-type transistor MN1 and P-type transistor MP3 and P-type transistor MP5 quilts
Conducting.Now, control voltage VCCS is DC input voitage VI, causes P-type transistor MP1 to be cut off with P-type transistor MP4.
Now, direct-current input power supplying PI (being illustrated in Fig. 1) can be by P-type transistor MP3 and N-type transistor MN1 with charging current Ic
First electric capacity C1 is charged.
Then, during electricity is taken out, clock generating circuit 261 can provide charge switch signal CS (or the enables of disabled state
The anti-phase charge switch signal CSB of state) and taking out for enabled status establish OFF signal PS by cable (or the anti-phase of disabled state taken out
Establish OFF signal PSB by cable), therefore P-type transistor MP2 can be switched on, and N-type transistor MN1 and P-type transistor MP3 and MP5 is cut
Only.Now, control voltage VCCS is the second error voltage produced by operational amplifier OP1, causes P-type transistor MP1 by cutting
Only area enters linear zone, and electric current Ip is taken out to provide, and by the electric charge transfer of direct-current input power supplying PI and the first electric capacity C1 to electricity
The output end of lotus pump 120 is providing VD VO.Additionally, the negative-feedback characteristic based on feedback circuit 140, direct current output
The voltage level of voltage VO can be constrained on a specific voltage level, and this specific voltage level is associated with reference voltage VR,
And can be determined according to practical application or design requirement.
For further, during electricity is taken out, cause again VD VO less than above-mentioned specific voltage when becomes in load
During level, the feedback voltage V FB that resistance R2 and resistance R3 is carried out produced by partial pressure to VD VO will be less than with reference to electricity
Pressure VR, therefore operational amplifier OP3 and the first error signal VE1 produced by compensation circuit 244 rise, and causes OP1 to be produced
The second raw error voltage VE2 declines.Consequently, it is possible to the first electric current I1 produced by P-type transistor MP4 rises, and P-type crystal
Electric current Ip risings are taken out produced by pipe MP1 so that VD VO rises and maintains above-mentioned specific voltage level.When
When first electric current I1 rises, sense the sensing voltage VRS produced on resistance RS and rise therewith, enter with to the first error signal VE1
Row is followed the trail of.And load lightens so that VD VO is higher than the situation of above-mentioned specific voltage level then according to described above class
It is pushed away to obtain, therefore is repeated no more.
Herein it is noted that during electricity is taken out, when the first electric current I1 flows through N-type transistor MN2 with sensing resistance RS
When, will be produced in the inverting input of the operational amplifier OP2 of voltage follower 2640 (i.e. the drain electrode end of P-type transistor MP4)
First voltage V1, therefore the cross-pressure between the source terminal and drain electrode end of P-type transistor MP4 can be avoided excessive and enter saturation region, because
This can allow P-type transistor MP4 to operate in linear zone.Additionally, the input voltage based on voltage follower 2640 follows characteristic, computing
The second voltage V2 of the non-inverting input (i.e. the drain electrode end of P-type transistor MP1) of amplifier OP2 can follow first voltage V1.
In other words, second voltage V2 substantially equal to first voltage V1, therefore will can avoid source terminal and the drain electrode of P-type transistor MP1
Cross-pressure between end is excessive and enter saturation region, therefore can allow P-type transistor MP1 operate in linear zone.
It is understood that during electricity is taken out, because the source terminal of P-type transistor MP1 and P-type transistor MP4 is all received
The gate terminal of DC input voitage VI, P-type transistor MP1 and MP4 is all controlled by control voltage VCCS (i.e. the second error voltages
VE2), the voltage (i.e. second voltage V2) of the drain electrode end of P-type transistor MP1 follows the voltage of the drain electrode end of P-type transistor MP4
(i.e. first voltage V1), and P-type transistor MP1 and P-type transistor MP4 each operate in linear zone, therefore P-type transistor MP1 and p-type
Transistor MP4 is substantially a current mirroring circuit.In other words, the first electric current I1 can be by P-type transistor MP1, P-type crystal
The coupling mode of pipe MP4 and voltage follower 2640 and mirror goes out to take out electric current Ip, the wherein breadth length ratio of P-type transistor MP1
(aspect ratio) may be designed as K times of the breadth length ratio of P-type transistor MP4, consequently, it is possible to taking out electric current Ip is the first electricity
K times of stream I1.
Generally speaking, because the electric supply installation 100 shown in Fig. 2 embodiments can adaptively modulation be taken out according to the change of load
Electric current Ip, therefore when transition is loaded, it is possible to decrease the ripple on VD.And, electric supply installation 100 is grasped for fixed frequency
Make, therefore electromagnetic interference can be reduced.Additionally, P-type transistor MP1 be during electricity is taken out operation in linear zone, its source terminal with leakage
Cross-pressure between extreme is relatively low (compared to saturation region), therefore can improve the power supply conversion efficiency of electric supply installation 100.
Below referring to Fig. 1, Fig. 2 and Fig. 3, Fig. 3 is according to shown in another embodiment explanatory diagram 1 of the present utility model
Charge pump 120, feedback circuit 140 and control circuit 160 circuit framework schematic diagram.Compared to the power supply of Fig. 2 embodiments
Device 100 can adaptively modulation takes out electric current Ip according to the change of load, and the electric supply installation 100 shown in Fig. 3 can be according to load
Change adaptively modulation charging current Ic.For further, the control circuit 160 of Fig. 3 can establish OFF signal by cable according to taking out
PS (or OFF signal PSB is established in anti-phase taking out by cable) and the first electric current I1 is produced during charging, and provide control voltage VCCS to filling
Electric switch circuit 222, causes charge switch circuit 222 to produce charging current Ic.Based on above-mentioned difference, the P-type transistor of Fig. 3
The gate terminal of MP1 is to receive anti-phase taking out to establish OFF signal PSB by cable, and the gate terminal of P-type transistor MP5 is to receive anti-phase taking out to establish by cable
OFF signal PSB, second input (i.e. the non-inverting input of operational amplifier OP2) of voltage follower 2640 is coupled to first
The first end (i.e. the drain electrode end of P-type transistor MP3) of electric capacity C1, the gate terminal of P-type transistor MP3 is to receive control voltage
VCCS.Other circuit frameworks in charge pump 120, feedback circuit 140 and control circuit 160 as Fig. 3, then can refer to
The related description of Fig. 2 is stated, therefore be will not be repeated here.
It is noted that the P-type transistor MP3 and P-type transistor MP4 of Fig. 3 operate in linear zone during charging,
First electric current I1 can mirror goes out to fill by P-type transistor MP3, the coupling mode of P-type transistor MP4 and voltage follower 2640
The breadth length ratio (aspect ratio) of electric current Ic, wherein P-type transistor MP3 may be designed as the breadth length ratio of P-type transistor MP4
K times, consequently, it is possible to charging current Ic is K times of the first electric current I1.Charge pump 120, feedback circuit 140 as Fig. 3 and
The Detailed Operation of circuit 160 is controlled, then be can refer to the related description of above-mentioned Fig. 2 and analogized to obtain it, therefore will not be repeated here.
Below referring to Fig. 1, Fig. 2 and Fig. 4, Fig. 4 is according to shown in another embodiment explanatory diagram 1 of the present utility model
Charge pump 120, feedback circuit 140 and control circuit 160 circuit framework schematic diagram.Compared to the power supply of Fig. 2 embodiments
Device 100 can adaptively modulation takes out electric current Ip according to the change of load, and the electric supply installation 100 shown in Fig. 4 can be according to load
Time span of the change during adaptively modulation charges or the time span during taking out electricity, and can be provided during electricity is taken out and consolidate
Fixed takes out electric current Ip.
The circuit framework of the charge pump 120 of Fig. 4 therefore can refer to mutually speaking on somebody's behalf for above-mentioned Fig. 2 similar to the charge pump 120 of Fig. 2
It is bright, will not be repeated here.And the feedback circuit 140 of Fig. 4 may include bleeder circuit 242 and comparator CMP3.Bleeder circuit 242
It is coupled between the output end of charge pump 120 and ground voltage terminal GND, is used to VD VO is carried out partial pressure to produce
Feedback voltage V FB.The inverting input of comparator CMP3 is used to receive feedback voltage V FB.The non-inverting input of comparator CMP3
End is used to receive reference voltage VR.The output end of comparator CMP3 is used to output pulse signal VPu.It is real of the present utility model one
In applying example, as shown in figure 4, bleeder circuit 242 may include that resistance R2 is serially connected in electric charge with resistance R3, wherein resistance R2 and resistance R3
Between the output end and ground voltage terminal GND of pump 120.
Control circuit 160 may include latch circuit 466, frequency tracking control circuit 467, clock generating circuit 461 and
Fixed current controling circuit 468.The first input end of latch circuit 466 is used to receive and latch pulse signal VPu, to produce clock pulse
Control signal SCK.In an embodiment of the present utility model, as shown in figure 4, latch circuit 466 may include SR latch units 4662.
SR latch units 4662 have setting end S, reset end R, positive output end Q and reversed-phase output QB, wherein setting end S can be used as door bolt
With return pulse signal VPu, resetting end R can be controlled by frequency tracking control circuit 467 to the first input end of lock circuit 466, just
Phase output terminal Q can be exported to clock generating circuit 461 and frequency tracking control circuit 467 clock pulse control signal SCK.
The input of frequency tracking control circuit 467 couples the output end of latch circuit 466 to receive clock pulse control signal
SCK.Frequency tracking controls circuit 467 to be used to detect clock pulse control signal SCK and know that the load of electric supply installation 100 changes, and
Work period (the duty for controlling latch circuit 466 accordingly to adjust clock pulse control signal SCK according to this load change
cycle).For further, when load becomes weight, frequency tracking control circuit 467 can be by the work of clock pulse control signal SCK
Cycle becomes big.Conversely, when load lightens, frequency tracking control circuit 467 can become the work period of clock pulse control signal SCK
It is small.
In an embodiment of the present utility model, as shown in figure 4, frequency tracking control circuit 467 may include phase frequency
Detector (phase frequency detector, PFD) 4672 and clock pulse adjustment circuit 4674.Phase-frequency detector
4672 first input end couples the output end of latch circuit 466 to receive clock pulse control signal SCK.Phase-frequency detector
4672 the second input is used to receive with reference to clock signal CKR.The output end of phase-frequency detector 4672 is used to provide inspection
Survey voltage VFTC.Phase-frequency detector 4672 may be used to detect clock pulse control signal SCK and the phase with reference to clock signal CKR
Relation or frequency relation and obtain detection voltage VFTC.Phase-frequency detector 4672 can be existing phase-frequency detector or
It is other phase frequencies detection circuit, therefore repeats no more.
The input of clock pulse adjustment circuit 4674 couples the output end of phase-frequency detector 4672 to receive detection voltage
VFTC, and a sawtooth waveforms VSAW is produced according to this, the wherein slope of sawtooth waveforms VSAW can be controlled by detection voltage VFTC.Work as sawtooth
When the magnitude of voltage of ripple VSAW reaches a critical voltage VT, clock pulse adjustment circuit 4674 can provide reset signal RE to SR latch units
4662 replacement end R to reset clock pulse control signal SCK, so as to reach the mesh of the work period of adjustment clock pulse control signal SCK
's.
In an embodiment of the present utility model, clock pulse adjustment circuit 4674 may include Voltage-current conversion circuit VIC, the 4th
Electric capacity C4, switch SW and comparator CMP4.The input of Voltage-current conversion circuit VIC receives detection voltage VFTC, will inspection
Survey voltage VFTC and be converted to detection electric current IFTC.The output end of the first end coupling Voltage-current conversion circuit VIC of the 4th electric capacity C4.
Second end of the 4th electric capacity C4 is coupled to ground voltage terminal GND.The first end for switching SW couples the defeated of Voltage-current conversion circuit VIC
Go out end.The second end for switching SW is coupled to ground voltage terminal GND.The control end for switching SW couples the anti-phase defeated of SR latch units 4662
Go out to hold QB to receive anti-phase clock pulse control signal SCKB.The inverting input of comparator CMP4 receives critical voltage VT.Compare
The non-inverting input of device CMP4 couples the first end of the 4th electric capacity C4.And the output end coupling SR latch units of comparator CMP4
4662 replacement end R.
The input of clock generating circuit 461 couples the output end of latch circuit 466 to receive clock pulse control signal SCK,
And produce according to this and adjust the work period of charge switch signal CS (or anti-phase charge switch signal CSB) and take out electric switch letter
The work period of number PS (or OFF signal PSB is established in anti-phase taking out by cable), wherein charge switch signal CS and smoke and establish OFF signal PS's by cable
Frequency can be a fixed frequency, but the utility model is not limited thereto.For example, when load becomes weight, due to clock pulse control
The work period of signal SCK processed becomes big, therefore clock generating circuit 461 can will take out the work period tune for establishing OFF signal PS by cable according to this
Greatly, the time span during taking out electricity with increase；Or, clock generating circuit 461 can according to this by the work of charge switch signal CS
Tuned up as the cycle, to increase the time span during charging.Conversely, when load lightens, due to the work of clock pulse control signal SCK
Diminish as the cycle, therefore clock generating circuit 461 can will be taken out and establish work period of OFF signal PS by cable and turn down according to this, and the electric phase is taken out to reduce
Between time span；Or, clock generating circuit 461 according to this can turn the work period of charge switch signal CS down, to drop
Time span during low charging.Clock generating circuit 461 can be existing clock pulse generator, therefore repeat no more.
Fixed current controling circuit 468 couples clock generating circuit 461 to receive charge switch signal CS (or anti-phase chargings
Switching signal CSB).Fixed current controling circuit 468 according to charge switch signal CS (or anti-phase charge switch signal CSB) in
The first electric current I1 is produced during taking out electricity, and provides control voltage VCCS to electric switch circuit 224 is taken out, caused and take out electric switch circuit
224 produce and fixed take out electric current Ip.
In an embodiment of the present utility model, as shown in figure 4, fixed current controling circuit 468 may include amplifying circuit
262nd, selection circuit 263 and current source circuit 264.Compared to Fig. 2 embodiments control circuit 160 in amplifying circuit 262,
Selection circuit 263 and current source circuit 264 adaptively modulation the first electric current I1 and can take out electric current according to the change of load
The amplifying circuit 262 of the fixed current controling circuit 468 shown in Ip, Fig. 4, selection circuit 263 and current source circuit 264 are only produced
The first fixed electric current I1, so as to take out the mirror of electric switch circuit 224 go out fixed to take out electric current Ip.Based on above-mentioned difference, Fig. 4's
Amplifying circuit 262 is to receive setting voltage VFX with sensing voltage VRS, and wherein setting voltage VFX is a fixed voltage, and it can be according to
Practical application or design requirement are determined.Selection circuit 263, current source circuit 264 and Current Voltage conversion electricity as Fig. 4
The detailed circuit framework on road 265, then can refer to the related description of embodiment illustrated in fig. 2, therefore repeat no more.
Referring again to Fig. 4, amplifying circuit 262 is used to amplify the difference between setting voltage VFX and sensing voltage VRS,
To produce the second error voltage VE2, cause current source circuit 264 that the first electric current I1 and sensing voltage VRS is produced during electricity is taken out,
So that sensing voltage VRS follows the trail of setting voltage VFX.Additionally, similar to the embodiment of Fig. 2, the P-type transistor MP1 and p-type of Fig. 4
Transistor MP4 is operable in linear zone during electricity is taken out, the first electric current I1 can by P-type transistor MP1, P-type transistor MP4 with
The coupling mode of voltage follower 2640 and mirror go out fixed takes out electric current Ip, the wherein breadth length ratio of P-type transistor MP1
(aspect ratio) may be designed as K times of the breadth length ratio of P-type transistor MP4, consequently, it is possible to smoke as K times of electric current Ip's
First electric current I1.The detailed fortune of selection circuit 263, current source circuit 264 and current-to-voltage converting circuit 265 as Fig. 4
Make, then can refer to the related description of embodiment illustrated in fig. 2 and analogize, therefore repeat no more.
Generally speaking, because the electric supply installation 100 shown in Fig. 4 embodiments can adaptively modulation fills according to the change of load
Establish the work period of OFF signal CS by cable or take out the work period for establishing OFF signal PS by cable, and provide it is fixed take out electric current Ip, therefore in
During load transition, it is possible to decrease the ripple on VD.And, electric supply installation 100 is operated for fixed frequency, therefore can reduce electromagnetism
Interference.Additionally, P-type transistor MP1 be cross-pressure of the operation between linear zone, its source terminal and drain electrode end during electricity is taken out compared with
Low (compared to saturation region), therefore the power supply conversion efficiency of electric supply installation 100 can be improved.
Below referring to Fig. 1, Fig. 4 and Fig. 5, Fig. 5 is according to shown in another embodiment explanatory diagram 1 of the present utility model
Charge pump 120, feedback circuit 140 and control circuit 160 circuit framework schematic diagram.Filled compared to the power supply shown in Fig. 4
Put 100 can be provided during electricity is taken out fixation take out electric current Ip, the electric supply installation 100 shown in Fig. 5 can be provided during charging consolidates
Fixed charging current Ic.For further, the fixed current controling circuit 468 of Fig. 5 can to establish OFF signal PS by cable (or anti-phase according to taking out
Take out establish OFF signal PSB by cable) and the first electric current I1 is produced during charging, and provide control voltage VCCS to charge switch circuit
222, cause charge switch circuit 222 to produce the charging current Ic of fixation.Based on above-mentioned difference, the P-type transistor MP1's of Fig. 5
Gate terminal receives anti-phase taking out and establishes OFF signal PSB by cable, and the gate terminal of P-type transistor MP5 receives anti-phase taking out and establishes OFF signal by cable
PSB, second input (i.e. the non-inverting input of operational amplifier OP2) of voltage follower 2640 couples the first electric capacity C1's
First end (i.e. the drain electrode end of P-type transistor MP3), the gate terminal of P-type transistor MP3 is used to receive control voltage VCCS.As for
Other circuit frameworks in the charge pump 120 of Fig. 5, feedback circuit 140 and control circuit 160, then can refer to the phase of above-mentioned Fig. 4
Speak on somebody's behalf bright, therefore will not be repeated here.
Referring again to Fig. 5, P-type transistor MP3 and P-type transistor MP4 is operated in linear zone during charging, the first electric current
I1 can mirror goes out charging current by P-type transistor MP3, the coupling mode of P-type transistor MP4 and voltage follower 2640
The breadth length ratio (aspect ratio) of Ic, wherein P-type transistor MP3 may be designed as K times of the breadth length ratio of P-type transistor MP4, such as
This one, charging current Ic is K times of the first electric current I1.Charge pump 120, feedback circuit 140 and control electricity as Fig. 5
Detailed Operation in road 160, then can refer to the related description of above-mentioned Fig. 4 and analogize to obtain it, therefore will not be repeated here.
In sum, the electric supply installation of the utility model embodiment can adaptively modulation charging be electric according to the change of load
Time span during flowing or take out electric current or charging or the time span during taking out electricity, therefore when transition is loaded, it is possible to decrease it is straight
Ripple on stream output voltage.And, the electric supply installation of the utility model embodiment is fixed frequency operation, therefore can reduce electromagnetism and do
Disturb.Additionally, the Partial Power transistor in the charge pump of the utility model embodiment is behaviour during charging or during taking out electricity
The cross-pressure made between linear zone, its source terminal and drain electrode end is relatively low (compared to saturation region), therefore can improve the electricity of electric supply installation
Source conversion efficiency.
Although the utility model is disclosed as above with embodiment, so it is not limited to the utility model, any affiliated
Those of ordinary skill in technical field, not departing from spirit and scope of the present utility model, when a little change can be made with profit
Decorations, in the range of the utility model.
Claims (16)
1. a kind of electric supply installation, is used to for the DC input voitage of direct-current input power supplying to be converted to VD, its feature
It is that the electric supply installation includes：
Charge pump, the charge pump includes the first electric capacity, and the charge pump is controlled by control signal group and is produced during charging
Charging current, with to first electric capacity charge, and the charge pump be controlled by the control signal group and during electricity is taken out
Electric current is taken out in generation, by the output end of the electric charge transfer of the direct-current input power supplying and first electric capacity to the charge pump
To provide the VD；
Feedback circuit, couples the output end of the charge pump to receive the VD, is used to detect described straight
Flow the relation of output voltage and reference voltage and accordingly export the first error signal or pulse signal；And
Control circuit, couples the output end of the feedback circuit to receive first error signal or the pulse signal, and
Detect the load of the electric supply installation and change and produce the control according to first error signal or the pulse signal
Signal group,
Wherein, the control signal group is configured to：
Determine the current value of the charging current and described take out one of current value of electric current；Or
Determine the time span during the charging and it is described take out electricity during time span at least one.
2. electric supply installation according to claim 1, it is characterised in that the charge pump also includes：
Charge switch circuit, the first end of the charge switch circuit is used to receive the DC input voitage, and the charging is opened
Second end on powered-down road couples the first end of first electric capacity, the 3rd end coupling first electricity of the charge switch circuit
The second end for holding, and the 4th end of the charge switch circuit couples ground voltage terminal, wherein the charge switch circuit is controlled
In the control signal group to produce the charging current during the charging, charged with to first electric capacity；
Electric switch circuit is taken out, the first end for taking out electric switch circuit is used to receive the DC input voitage, and described taking out is established by cable
Second end on powered-down road couples second end of first electric capacity, the 3rd end coupling for taking out electric switch circuit described the
The first end of one electric capacity, and the 4th end for taking out electric switch circuit couples the output end of the charge pump, wherein
The electric switch circuit of taking out is controlled by the control signal group, with it is described take out electricity during provide it is described take out electric current with it is described directly
Flow the output end of output voltage to the charge pump；And
Output capacitance, is coupled between the output end of the charge pump and the ground voltage terminal.
3. electric supply installation according to claim 2, it is characterised in that the control signal group includes control voltage, first
Electric current, charge switch signal and take out and establish OFF signal by cable, wherein the control circuit includes：
Clock generating circuit, is used to produce the charge switch signal and described taking out to establish OFF signal by cable, wherein the charging is opened
OFF signal and it is described take out establish by cable OFF signal frequency be fixed frequency；
Amplifying circuit, is used to receive first error signal and sensing voltage, and by first error signal and the sense
The difference surveyed between voltage is amplified, to produce the second error voltage；
Selection circuit, the control end of the selection circuit is used to receive the charge switch signal or described taking out establishes OFF signal by cable,
The first input end of the selection circuit is used to receive the DC input voitage, and the second input of the selection circuit is used to
Second error voltage is received, and the output end of the selection circuit is used to export the control voltage, wherein the selection
Circuit establishes OFF signal by cable in the DC input voitage and second error electricity according to the charge switch signal or described taking out
One of pressure is used as the control voltage；And
Current source circuit, is coupled between wherein one end of the selection circuit and first electric capacity, the current source circuit
Receive the DC input voitage, and be controlled by the control voltage and during the charging or it is described take out electricity during produce institute
The first electric current and the sensing voltage are stated, wherein first electric current determines the charging current or described takes out electric current, and institute
State sensing voltage and follow the trail of first error signal.
4. electric supply installation according to claim 3, it is characterised in that：
The selection circuit exports the DC input voitage to make according to the charge switch signal during the charging
Be the control voltage, and the selection circuit according to the charge switch signal during the charging beyond time zone
Between export second error voltage as the control voltage,
Wherein described selection circuit includes the 5th P-type transistor, the source terminal coupling selection electricity of the 5th P-type transistor
The first input end on road, the gate terminal of the 5th P-type transistor couples the control end of the selection circuit, and institute
The drain electrode end for stating the 5th P-type transistor couples second input and the output end of the selection circuit.
5. electric supply installation according to claim 3, it is characterised in that the electric switch circuit of taking out includes：
First P-type transistor, the source terminal of first P-type transistor is used to receive the DC input voitage, a P
The drain electrode end of transistor npn npn couples second end of first electric capacity, and the gate terminal of first P-type transistor is used to
Receive the control voltage, wherein first P-type transistor it is described take out electricity during operate in linear zone, with based on described
One electric current and accordingly adjust the current value for taking out electric current；And
Second P-type transistor, the source terminal of second P-type transistor couples the output end of the charge pump, and described the
The drain electrode end of two P-type transistors couples the first end of first electric capacity, and the gate terminal of second P-type transistor is used
With receive it is anti-phase described in take out and establish OFF signal by cable,
Wherein described charge switch circuit includes：
3rd P-type transistor, the source terminal of the 3rd P-type transistor is used to receive the DC input voitage, the 3rd P
The drain electrode end of transistor npn npn couples the first end of first electric capacity, and the gate terminal of the 3rd P-type transistor is used to
Receive the anti-phase charge switch signal；And
First N-type transistor, the source terminal of first N-type transistor couples the ground voltage terminal, the first N-type crystal
The drain electrode end of pipe couples second end of first electric capacity, and the gate terminal of first N-type transistor is used to receive institute
State charge switch signal.
6. electric supply installation according to claim 3, it is characterised in that：
The selection circuit taken out according to establish OFF signal by cable and in it is described take out electricity during the DC input voitage is exported to make
Be the control voltage, and the selection circuit taken out according to establish OFF signal by cable and in it is described take out electricity during beyond time zone
Between export second error voltage as the control voltage,
Wherein described selection circuit includes the 5th P-type transistor, the source terminal coupling selection electricity of the 5th P-type transistor
The first input end on road, the gate terminal of the 5th P-type transistor couples the control end of the selection circuit, and institute
The drain electrode end for stating the 5th P-type transistor couples second input and the output end of the selection circuit.
7. electric supply installation according to claim 3, it is characterised in that the electric switch circuit of taking out includes：
First P-type transistor, the source terminal of first P-type transistor is used to receive the DC input voitage, a P
The drain electrode end of transistor npn npn couples second end of first electric capacity, and the gate terminal of first P-type transistor is used to
Receive anti-phase described taking out and establish OFF signal by cable；And
Second P-type transistor, the source terminal of second P-type transistor couples the output end of the charge pump, and described the
The drain electrode end of two P-type transistors couples the first end of first electric capacity, and the gate terminal of second P-type transistor is used
With receive it is anti-phase described in take out and establish OFF signal by cable,
Wherein described charge switch circuit includes：
3rd P-type transistor, the source terminal of the 3rd P-type transistor is used to receive the DC input voitage, the 3rd P
The drain electrode end of transistor npn npn couples the first end of first electric capacity, and the gate terminal of the 3rd P-type transistor is used to
The control voltage is received, wherein the 3rd P-type transistor is operated in linear zone during the charging, with based on described
One electric current and accordingly adjust the current value of the charging current；And
First N-type transistor, the source terminal of first N-type transistor couples the ground voltage terminal, the first N-type crystal
The drain electrode end of pipe couples second end of first electric capacity, and the gate terminal of first N-type transistor is used to receive institute
State charge switch signal.
8. electric supply installation according to claim 3, it is characterised in that：
The amplifying circuit includes operational amplifier, wherein the inverting input of the operational amplifier is used to receive described first
Error signal, the non-inverting input of the operational amplifier is used to receive the sensing voltage, and the operational amplifier
Output end exports second error voltage；
The current source circuit includes：
4th P-type transistor, the source terminal of the 4th P-type transistor is used to receive the DC input voitage, the 4th P
The gate terminal of transistor npn npn is used to receive the control voltage, and the drain electrode end of the 4th P-type transistor exports described first
Electric current, wherein the 4th P-type transistor it is described take out electricity during or the charging during operate in linear zone；
Voltage follower, the first input end of the voltage follower couples the drain electrode end of the 4th P-type transistor to receive
First electric current, the second input of the voltage follower couples wherein one end of first electric capacity, and the voltage
The output end of follower transmits first electric current；And
Sensing resistance, the sensing resistance be coupled in the voltage follower the output end and the ground voltage terminal it
Between, it is used to react on first electric current and produce the sensing voltage.
9. electric supply installation according to claim 8, it is characterised in that the voltage follower includes：
Operational amplifier, the non-inverting input of the operational amplifier couples second input of the voltage follower
End, the inverting input of the operational amplifier couples the first input end of the voltage follower；
Second N-type transistor, the gate terminal of second N-type transistor couples the output end of the operational amplifier, and described the
The drain electrode end of two N-type transistors couples the first input end of the voltage follower, the source electrode of second N-type transistor
The output end of the end coupling voltage follower；And
Second electric capacity, the first end of second electric capacity couples the output end of the operational amplifier, and second electricity
The second end for holding couples the ground voltage terminal.
10. electric supply installation according to claim 3, it is characterised in that the feedback circuit includes：
Bleeder circuit, is coupled between the output end of the charge pump and ground voltage terminal, is used to the direct current output
Voltage carries out partial pressure to produce feedback voltage；
Operational amplifier, the inverting input of the operational amplifier is used to receive the feedback voltage, the operational amplifier
Non-inverting input be used to receive the reference voltage, and the output end of the operational amplifier is used to output error result；
And
Compensation circuit, is coupled between the output end of the operational amplifier and the ground voltage terminal, is used to described
Error result compensates to produce first error signal.
11. electric supply installations according to claim 2, it is characterised in that the control signal group includes charge switch signal
And take out and establish OFF signal by cable, wherein the control circuit includes：
Latch circuit, the first input end of the latch circuit is used to receive and pulse signal described in breech lock, to produce clock pulse control
Signal processed；
Frequency tracking controls the input of circuit, the frequency tracking control circuit to couple the output end of the latch circuit to connect
The clock pulse control signal is received, is used to detect the clock pulse control signal and know that the load of the electric supply installation changes, and according to
The latch circuit is controlled according to the load change with the work period of the correspondence adjustment clock pulse control signal；
Clock generating circuit, is used to produce the charge switch signal to establish OFF signal by cable with described taking out, wherein the clock pulse is produced
The input of circuit couples the output end of the latch circuit to receive the clock pulse control signal, and adjusts according to this described
The work period of charge switch signal described takes out the work period for establishing OFF signal by cable；And
Fixed current controling circuit, couples the clock generating circuit and is believed with receiving the charge switch signal or the electric switch of taking out
Number,
Wherein described fixed current controling circuit according to the charge switch signal in it is described take out electricity during produce the first electric current, and
Control voltage is provided and takes out electric switch circuit to described, cause the electric switch circuit of taking out to produce the described of fixation to take out electric current, or
Person is that the fixed current controling circuit is taken out according to and establishes OFF signal by cable and first electric current is produced during the charging,
And the control voltage to the charge switch circuit is provided, cause the charge switch circuit to produce fixed charging electricity
Stream.
12. electric supply installations according to claim 11, it is characterised in that the fixed current controling circuit includes：
Amplifying circuit, is used to receive setting voltage and sensing voltage, and by between the setting voltage and the sensing voltage
Difference is amplified, to produce the second error voltage；
Selection circuit, the control end of the selection circuit is used to receive the charge switch signal or described taking out establishes OFF signal by cable,
The first input end of the selection circuit is used to receive the DC input voitage, and the second input of the selection circuit is used to
Second error voltage is received, and the output end of the selection circuit is used to export the control voltage, wherein the selection
Circuit establishes OFF signal by cable in the DC input voitage and second error electricity according to the charge switch signal or described taking out
One of pressure is used as the control voltage；And
Current source circuit, is coupled between wherein one end of the selection circuit and first electric capacity, the current source circuit
Receive the DC input voitage, and be controlled by the control voltage and during the charging or it is described take out electricity during produce institute
The first electric current and the sensing voltage are stated, wherein first electric current determines the charging current or described takes out electric current, and institute
State sensing voltage and follow the trail of the setting voltage.
13. electric supply installations according to claim 11, it is characterised in that the latch circuit includes：
SR latch units, with setting end, reset end, positive output end and reversed-phase output, wherein the setting end is used as described
The first input end of latch circuit, the replacement end is controlled by the frequency tracking control circuit, the positive output end
The clock pulse control signal is exported to the clock generating circuit and frequency tracking control circuit.
14. electric supply installations according to claim 13, it is characterised in that the frequency tracking control circuit includes：
Phase-frequency detector, the first input end of the phase-frequency detector couples the output end of the latch circuit
To receive the clock pulse control signal, the second input of the phase-frequency detector is used to receive and refers to clock signal, institute
The output end for stating phase-frequency detector is used to provide detection voltage, and the phase-frequency detector is used to detect the clock pulse control
Signal processed obtains the detection voltage with the phase relation or frequency relation of the reference clock signal；And
Clock pulse adjustment circuit, the input of the clock pulse adjustment circuit couple the output end of the phase-frequency detector with
Receive the detection voltage and produce sawtooth waveforms according to this, wherein the slope of the sawtooth waveforms is controlled by the detection voltage,
When the magnitude of voltage of the sawtooth waveforms reaches critical voltage, the clock pulse adjustment circuit provides reset signal to the SR latch units
The replacement end, to adjust the work period of the clock pulse control signal.
15. electric supply installations according to claim 14, it is characterised in that the clock pulse adjustment circuit includes：
Voltage-current conversion circuit, the input of the Voltage-current conversion circuit receives the detection voltage, by the detection electricity
Pressure is converted to detection electric current；
4th electric capacity, the first end of the 4th electric capacity couples the output end of the Voltage-current conversion circuit, the 4th electric capacity
The second end couple the ground voltage terminal；
Switch, the first end of the switch couples the output end of the Voltage-current conversion circuit, the second end of the switch
Couple the ground voltage terminal, and the control end of the switch couples the reversed-phase output of the SR latch units；And
Comparator, the inverting input of the comparator receives the critical voltage, the non-inverting input coupling of the comparator
The first end of the 4th electric capacity is connect, and the output end of the comparator couples the replacement end of the SR latch units.
16. electric supply installations according to claim 11, it is characterised in that the feedback circuit includes：
Bleeder circuit, is coupled between the output end of the charge pump and ground voltage terminal, is used to the direct current output
Voltage carries out partial pressure to produce feedback voltage；
Comparator, the inverting input of the comparator is used to receive the feedback voltage, the non-inverting input of the comparator
End is used to receive the reference voltage, and the output end of the comparator is used to export the pulse signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW105214076 | 2016-09-12 | ||
| TW105214076U TWM539182U (en) | 2016-09-12 | 2016-09-12 | Power supply apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206294073U true CN206294073U (en) | 2017-06-30 |
Family
ID=59100017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621202620.4U Active CN206294073U (en) | 2016-09-12 | 2016-11-08 | Power supply device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN206294073U (en) |
| TW (1) | TWM539182U (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10250132B2 (en) * | 2017-06-09 | 2019-04-02 | Nanya Technology Corporation | Voltage system and operating method thereof |
| TWI637635B (en) * | 2017-08-28 | 2018-10-01 | 大陸商廈門科塔電子有限公司 | Power management control circuit and lnb circuit therefor |
| TWI751878B (en) * | 2021-01-06 | 2022-01-01 | 瑞鼎科技股份有限公司 | Charge pump circuit |
-
2016
- 2016-09-12 TW TW105214076U patent/TWM539182U/en unknown
- 2016-11-08 CN CN201621202620.4U patent/CN206294073U/en active Active
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| TWM539182U (en) | 2017-04-01 |
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Effective date of registration: 20220424 Address after: Hsinchu County, Taiwan, China Patentee after: ILI TECHNOLOGY Corp. Address before: Grand Cayman Patentee before: Yili Technology (Cayman) Co.,Ltd. |
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