CN103944233B - Device for supplying power through battery and power supply method of device - Google Patents
Device for supplying power through battery and power supply method of device Download PDFInfo
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- CN103944233B CN103944233B CN201410174755.3A CN201410174755A CN103944233B CN 103944233 B CN103944233 B CN 103944233B CN 201410174755 A CN201410174755 A CN 201410174755A CN 103944233 B CN103944233 B CN 103944233B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention provides a device for supplying power through a battery and a power supply method of the device. The device comprises a control circuit, a direct current/direct current conversion circuit and a power utilization circuit, wherein the control circuit is used for detecting an input signal and generating a control signal used for instructing the work state of the device based on the input signal; an input port of the direct current/direct current conversion circuit is used for being connected with a positive electrode and a negative electrode of the battery, the direct current/direct current conversion circuit receives the control signal and converts the input voltage of the input port into the output voltage, responds to the control signal and instructs the device to be in the non-standby state, so that the voltage value of the output voltage generated by the direct current/direct current conversion circuit is a first voltage; the direct current/direct current conversion circuit responds to the control signal and instructs the device to be in the standby state, so that the voltage value of the output voltage generated by the direct current/direct current conversion circuit is a second voltage different from the first voltage; the power utilization circuit is connected with an output port of the direct current/direct current conversion circuit so as to receive the output voltage. The battery capacity can be fully used by the device, so that use cost is reduced, and a constant supply current is maintained.
Description
Technical field
The present invention relates to make battery-powered device and method of supplying power to thereof, particularly relate to a kind of energy saving and environment friendly,
Make battery-powered low-power device and method of supplying power to thereof.
Background technology
In view of the factor such as portable, easy, some lower powered electronic equipments generally use battery to power, such as electricity
Sub-thermometer, electric sphygmomanometer, remote controller etc..Battery can be rechargeable battery (such as lithium battery) or dry electricity
Pond etc..The common prescription of above-mentioned application is the most efficiently and makes full use of the capacity of battery, improves battery powered
Persistent period.
As a example by the remote controller of household electrical appliances, its internal man-machine interface circuit and signal sending circuit are required to power supply.
In above-mentioned signal sending circuit, infrared transmitting tube is generally utilized to transmit signal by infrared ray, common infrared
The cut-in voltage of transmitting tube is all between 1.7～2V.When using dry cell power supply, single-unit dry cell voltage is not enough
With the requirement providing signal circuit normally to send, therefore typically require employing two joint aneroid battery series-fed.Due to electricity
Cell voltage is relevant with its discharge capacity, and single-unit aneroid battery terminal voltage when full capacity can reach 1.5V, and discharges
End stage (running down of battery stage in other words), it is even lower that terminal voltage would fall to 0.8V.Therefore, opening
In stage beginning, owing to battery terminal voltage is higher, after two batteries series connection, supply voltage is up to 3V, causes signal to be sent out
The transmitting power on power transmission road is relatively big, even radiating circuit is caused damage.The spy of infrared transmitting tube (IR LED)
Property is similar to diode, when supply voltage exceedes its cut-in voltage, its electric current increase sharply and voltage drop increase relatively
Few.In order to limit battery terminal voltage higher time electric current, need when generally powering to signal sending circuit to connect one
Current-limiting resistance.
But decline when battery terminal voltage and be not provided that enough electric currents, to signal sending circuit, cause battery-end
When voltage is low voltage, series limiting resistor can make signal circuit not be provided that enough transmitting power.
The block diagram of the sender unit of a kind of typical tradition power supply mode is given with reference to Fig. 1, Fig. 1.At figure
In system shown in 1, after two joint aneroid battery 10 series connection, power to infrared transmitting tube LED and control circuit 11.
One end of infrared transmitting tube LED is connected to one end of power supply (namely battery 10) by current-limiting resistance Rs, red
The other end of emission pipe LED is connected to the I/O end of control circuit 11.Control circuit 11 detects outside
Input signal, such as, can scan key-press input signal by key scanning circuit 111, based on detect by
Key information, produces and sends control signal.This transmission control signal is used for the turn-on and turn-off controlling to switch S1, from
And control the break-make of infrared transmitting tube LED to launch specific signal.When being not detected by input signal, example
As key scanning circuit 111 is not detected by key-press input signal, then control circuit 11 does not produce transmission control letter
Number, system is in holding state.Wherein, the Main Function of current-limiting resistance Rs is when cell voltage is higher, limit
System flows through the electric current of infrared transmitting tube LED.In some applications, can flow due to infrared transmitting tube LED
The current ratio crossed is bigger, it is also possible to do not have current-limiting resistance Rs.
Under the power supply mode shown in Fig. 1, the switch S1 in control circuit 11 turns on to carry out signal transmission
Time, the size of current flowing through infrared transmitting tube LED is proportional to supply voltage.The terminal voltage of battery 10 is the highest,
Electric current is the biggest, and the consumption of battery 10 is the biggest, thus shortens the life-span of battery 10.End when battery 10
Voltage drops to certain numerical value (namely blanking voltage), then be not enough to provide enough electric current to infrared transmitting tube
LED, causes the hydraulic performance decline of signal sending circuit, it is impossible to meet application demand.Generally, current-limiting resistance Rs is more
Greatly, the discharge cut-off voltage of battery 10 is the highest, and the capacity of battery 10 more can not be fully utilized, and not only increases
Use cost, is also unfavorable for energy-conserving and environment-protective.
Fig. 2 shows under Fig. 1 tradition power supply mode, the terminal voltage of single battery with flow through infrared transmitting tube LED
Electric current between relation.In Fig. 2, abscissa is single battery voltage, and vertical coordinate is for flowing through infrared transmitting tube
The electric current of LED.For meeting the requirement of signal emissive porwer, the electric current generally flowing through infrared transmitting tube LED is necessary
More than the numerical value (namely minimum transmitting tube electric current) preset.From figure 2 it can be seen that in the current limliting of different resistances
Under resistance, in order to meet this minimum transmitting tube electric current, the blanking voltage of battery discharge along with current-limiting resistance increase and
Increase, cause battery capacity not make full use of.And cell voltage is higher when, flow through infrared transmitting tube
Electric current is excessive, causes battery discharge too fast and is easily damaged transmitting tube.When being 2 ohm such as current-limiting resistance Rs,
The blanking voltage of battery is 1.15V, causes battery to have quite a few capacity to be used.
Visible, traditional power supply circuits need two joint or multiple batteries series-feds, and such power supply mode exists
The problem that battery capacity can not make full use of, thus cause use cost increase, the wasting of resources and pollute environment etc.
Problem.
Accordingly, it would be desirable to a kind of new power supply circuits and power supply mode, to make full use of the capacity of supplying cell, and
Reduce the use cost of system further.
Summary of the invention
The technical problem to be solved in the present invention is to provide one and makes battery-powered device and method of supplying power to thereof, energy
Enough make full use of battery capacity, reduce use cost, maintain constant supply current.
For solving above-mentioned technical problem, the invention provides one and make battery-powered device, including:
Control circuit, is used for detecting input signal, and is used for indicating this device to work based on the generation of this input signal
The control signal of state；
DC/DC conversion circuit, its input port is for connecting positive pole and the negative pole of battery, and this DC-DC turns
Change circuit and receive described control signal, the input voltage of described input port is converted to output voltage, in response to institute
Stating control signal indicates this device to be non-standby state, the output voltage that described DC/DC conversion circuit produces
Magnitude of voltage is the first voltage, indicates this device to be holding state in response to described control signal, the most described direct current/straight
The magnitude of voltage of the output voltage that stream change-over circuit produces is the second voltage being different from this first voltage；
Power circuit, is connected with the output port of described DC/DC conversion circuit to receive described output voltage.
According to one embodiment of present invention, described power circuit is signal sending circuit, and this power circuit includes
Transmitting tube, its anode connects the first end of the output port of described DC/DC conversion circuit,
This control circuit has I/O end and ground end, and this I/O end connects the negative electrode of described transmitting tube, and this ground end connects
Second end of described output port, described control circuit includes:
Switch, its first end connects described I/O end, and its second end connects described ground end；
Testing circuit, is used for detecting this input signal, produces when this input signal being detected and sends control letter
Number, the control end of this transmission control signal transmission to described switch is to control the turn-on and turn-off of described switch, not
Described transmission control signal is not produced when described input signal being detected.
According to one embodiment of present invention, described testing circuit produces described control always according to described input signal
Signal, when this input signal being detected, described control signal is effective, described in when being not detected by described input signal
Control signal is invalid；
Described DC/DC conversion circuit is controlled by described control signal, when described control signal is effective, described
The magnitude of voltage of output voltage is described first voltage, when described control signal is invalid, and the voltage of described output voltage
Value is described second voltage.
According to one embodiment of present invention, described DC/DC conversion circuit is Boost DC/DC conversion
Device, step-down type dc/DC transformer or buck-boost type DC/DC converter.
According to one embodiment of present invention, described DC/DC conversion circuit includes:
Inductance, its first end is for connecting the positive pole of described battery；
First switching tube, its first end connects the second end of described inductance, and its second end is used for connecting described battery
Negative pole, its control end receive the first control signal；
Second switch pipe, its first end connects the second end of described inductance, and it controls end and receives the second control signal；
Output capacitance, its first end connects the second end of described second switch pipe, and its second end connects described first
Second end of switching tube；
First feedback resistance, its first end connects the second end of described second switch pipe；
Output voltage feedback circuit, its input port connects the first end and second end of described output capacitance, and this is defeated
Go out voltage feedback circuit output voltage based on described output capacitance two ends and obtain error signal；
PWM circuit, its input connects the outfan of described output voltage feedback circuit to receive this error
Signal, this PWM circuit according to this error signal carry out pulsewidth modulation with produce described first control signal and
Second control signal；
With door, its first input end connects the outfan of described PWM circuit, and its second input receives
Described output control signal.
According to one embodiment of present invention, described output voltage feedback circuit includes:
First operational amplifier, its first input end connects the second end of described first feedback resistance, its second end
Receive the reference voltage preset；
Second feedback resistance, its first end connects the second end of described output capacitance, and its second end connects described the
The first input end of one operational amplifier；
First electric capacity, its first end connects the first input end of described first operational amplifier；
First resistance, its first end connects the second end of described first electric capacity, and its second end connects described first fortune
Calculate the outfan of amplifier.
According to one embodiment of present invention, described DC/DC conversion circuit includes:
Inductance, its first end is for connecting the positive pole of described battery；
First switching tube, its first end connects the second end of described inductance, and its second end is used for connecting described battery
Negative pole, its control end receive the first control signal；
Second switch pipe, its first end connects the second end of described inductance, and it controls end and receives the second control signal,
Described first control signal and the second control signal are complementary；
Output capacitance, its first end connects the second end of described second switch pipe, and its second end connects described first
Second end of switching tube；
First feedback resistance, its first end connects the second end of described second switch pipe；
Output voltage feedback circuit, its input port connects the first end and second end of described output capacitance, and this is defeated
Go out voltage feedback circuit output voltages based on described output capacitance two ends under the control of described output control signal
Obtain error signal；
PWM circuit, its input connects the outfan of described output voltage feedback circuit to receive this error
Signal, this PWM circuit according to this error signal carry out pulsewidth modulation with produce described first control signal and
Second control signal.
According to one embodiment of present invention, described output voltage feedback circuit includes:
First operational amplifier, its first input end connects the second end of described first feedback resistance, its second end
Receive the reference voltage preset；
Second feedback resistance, its first end connects the second end of described output capacitance, and its second end connects described the
The first input end of one operational amplifier；
Feedback switch, its first end connects the first end of described second feedback resistance, and it controls end and receives described defeated
Go out control signal；
3rd feedback resistance, its first end connects the second end of described feedback switch, and its second end connects described the
Second end of two feedback resistances；
First electric capacity, its first end connects the first input end of described first operational amplifier；
First resistance, its first end connects the second end of described first electric capacity, and its second end connects described first fortune
Calculate the outfan of amplifier.
According to one embodiment of present invention, described PWM circuit includes: the second operational amplifier, its
First input end connects the outfan of described output voltage feedback circuit, and its second end receives the pulse signal preset.
According to one embodiment of present invention, the input port of described DC/DC conversion circuit is used for connecting same
The positive pole of battery and negative pole.
According to one embodiment of present invention, described first voltage is more than described second voltage.
Present invention also offers a kind of method of supplying power to making battery-powered device, including:
Detection input signal, and produce the control signal for indicating this device duty based on this input signal；
Use DC/DC conversion circuit, according to this control signal, the voltage at battery two ends is converted to output voltage,
If described control signal indicates this device to be non-standby state, the magnitude of voltage of the most described output voltage is the first voltage,
If described control signal indicates this device to be holding state, the magnitude of voltage of the most described output voltage for be different from this first
Second voltage of voltage；
Described output voltage is transmitted to power circuit, to power to described power circuit.
According to one embodiment of present invention, described first voltage is more than described second voltage.
Compared with prior art, the invention have the advantages that
The battery-powered device that makes of the embodiment of the present invention uses DC/DC conversion circuit to be changed by input voltage
For stable output voltage, this output voltage does not changes with the change of input voltage, the most not with battery-end electricity
The change of pressure and change, such that it is able to make full use of the capacity of battery, and the service behaviour of beneficially raising equipment.
Additionally, in the battery-powered device of the embodiment of the present invention, DC/DC conversion circuit is according to instruction dress
Put the control signal of duty to regulate the magnitude of voltage of this output voltage, if described control signal indicates this device to be
Non-standby state, the magnitude of voltage of the most described output voltage is the first of a relatively high voltage, to meet device work
Need；If described control signal indicates this device to be holding state, the magnitude of voltage of the most described output voltage is relatively
The second low voltage, to reduce stand-by power consumption.
Furthermore, when this device is remote controller, compares traditional employing two and save or the confession of more multiple batteries
The mode of electricity, the technical scheme of the embodiment of the present invention can make full use of the capacity of battery, when improving the continuation of the journey of battery
Between；And more stable signal intensity can be obtained when launching signal, improve the performance of remote controller.
Accompanying drawing explanation
Fig. 1 is the power supply circuits schematic diagram of a kind of signal sending circuit in prior art；
Fig. 2 is the relation curve signal of single battery voltage and infrared emission tube current in power supply circuits shown in Fig. 1
Figure；
Fig. 3 is the electrical block diagram making battery-powered device of the embodiment of the present invention；
Fig. 4 is the work wave schematic diagram making battery-powered device shown in Fig. 3；
Fig. 5 is the electricity of a kind of voltage boosting dc/DC transformer making battery-powered device of the embodiment of the present invention
Line structure schematic diagram；
Fig. 6 is the another kind of voltage boosting dc/DC transformer making battery-powered device of the embodiment of the present invention
Electrical block diagram；
Fig. 7 is the electricity of a kind of step-down DC-DC current transformer making battery-powered device of the embodiment of the present invention
Line structure schematic diagram；
Fig. 8 is the another kind of step-down DC-DC current transformer making battery-powered device of the embodiment of the present invention
Electrical block diagram；
Fig. 9 is that the battery-powered device that makes of the embodiment of the present invention is using step-down type dc/direct current shown in Fig. 8
Working waveform figure during translation circuit；
Figure 10 is a kind of buck-boost type DC-DC unsteady flow making battery-powered device of the embodiment of the present invention
The electrical block diagram of device.
Detailed description of the invention
Below in conjunction with specific embodiments and the drawings, the invention will be further described, but should not limit this with this
Bright protection domain.
For solving problems of the prior art, a kind of embodiment is to use Boost DC/direct current conversion
Circuit.With reference to Fig. 3, the battery-powered device that makes of the present embodiment includes DC/DC conversion circuit 31 (also
Claim DC/DC converter), control circuit 33 and the use that is connected with this DC/DC conversion circuit 31
Electricity circuit.Wherein, in the embodiment shown in fig. 3, DC/DC conversion circuit 31 is a Boost DC
/ DC converting circuit, this Boost DC/DC converting circuit 31 input port is for connecting the positive pole of battery 30
And negative pole, this Boost DC/DC converting circuit 31 is by input voltage (namely battery 30 of input port
Voltage) boost conversion is output voltage Vo, this output voltage does not changes with the change of input voltage.
This control circuit 33 detects input signal, produces for indicating device duty based on this input signal
Control signal EN.This DC/DC conversion circuit 31 produces relevant voltage value in response to this control signal EN
Output voltage.The magnitude of voltage of this output voltage Vo is determined by the duty of device, is in non-standby shape at device
Under state, the magnitude of voltage of output voltage Vo is the first voltage, when device is in holding state, and the electricity of output voltage
Pressure value is the second voltage, and this first voltage is more than the second voltage；Power circuit and Boost DC/direct current conversion electricity
The output port on road 31 is connected to receive this output voltage Vo.Wherein, holding state refers to device and does not holds
The function that during its design of row, expection is to be realized, is a kind of waiting state；Non-standby state refers to beyond holding state
Other states, such as device is carrying out expection function to be realized during design.
As a preferred embodiment, the quantity of battery 30 is one, namely Boost DC/direct current conversion
The input port of circuit 31 is connected to positive pole and the negative pole of same battery.
It addition, as a preferred embodiment, this DC/DC conversion circuit 31 can be booster type (Boost)
DC-DC (DC-DC) current transformer.Certainly, it will be appreciated by those skilled in the art that this DC/DC conversion
Circuit 31 can also use the circuit of other forms to realize boosting, such as voltage-dropping type (Buck) DC-DC change
Stream device or buck-boost type (Buck-Boost) type DC/DC converter.
The device of the present embodiment is as a example by remote controller, and this power circuit can be signal sending circuit, specifically wraps
Including: transmitting tube 32, its anode connects the first end of the output port of Boost DC/DC converting circuit 31.
This control circuit 33 has I/O end and ground end GND, and this I/O end connects the negative electrode of transmitting tube 32, should
Ground end GND connects the second end of the output port of Boost DC/DC converting circuit 31.
Furthermore, this control circuit 33 includes: switch S1, and its first end connects I/O end, its second end
Even earth terminal GND；Testing circuit 331, is used for detecting input signal, produces when this input signal being detected
Send control signal, this transmission control signal transmission to switch S1 control end with control switch S1 conducting and
Turn off, do not produce transmission control signal when being not detected by input signal.
In the present embodiment, this testing circuit 331 is key scanning circuit, for detecting the button of outside input
Signal, when key-press input signal being detected, produces and sends control signal, to control switch S1 turn-on and turn-off,
When being not detected by key-press input signal, do not produce this transmission control signal.
It addition, as a preferred embodiment, this testing circuit 331 produces always according to input signal and controls letter
Number EN, when this input signal being detected, this control signal EN is effective, such as, can be high level；Not
When input signal being detected, control signal EN is invalid, such as, can be low level.DC/DC conversion circuit
31 are controlled by this control signal EN, and when control signal EN is effective, DC/DC conversion circuit 31 produces
The magnitude of voltage of output voltage Vo is the first voltage, when exporting control signal EN and being invalid, and DC/DC conversion electricity
The magnitude of voltage of the output voltage Vo that road 31 produces is the second voltage, and this first voltage is more than the second voltage.Such as
For signal sending circuit, the magnitude of voltage of this first voltage can meet under transmitting tube 32 power requirement
Optimal value；And the magnitude of voltage of this second voltage can be less than the first voltage, such as, can be cell voltage, namely
Primary voltage before boosting.
Furthermore, if control circuit 33 receives input signal (such as push button signalling), this is shown
Time need to send signal, within this time period, control signal EN that control circuit 33 produces is effective, example
As for high level so that the output voltage Vo of this step-up DC-DC current transformer 31 is of a relatively high electricity
Pressure, so that the electric current flowing through transmitting tube 32 reaches setting value, this setting value can be to meet to launch by force
The minimum current that degree requires；Meanwhile, control circuit 32 is realized by the turn-on and turn-off controlling switch S1
The transmission of signal.
And when being not detected by input signal, namely when no signal sends, control circuit 33 controls to open
Close S1 to turn off so that no current flows through transmitting tube 32；Meanwhile, the control signal that control circuit 33 produces
EN is invalid, for example, low level so that the output voltage of step-up DC-DC current transformer 31 is relatively
Low voltage, to reduce system power dissipation.
As above, during signal sends, it is of a relatively high that above-mentioned step-up DC-DC current transformer 31 exports one
Voltage, meets the transmitting tube demand to power supply；During no signal sends, above-mentioned step-up DC-DC becomes
Stream device 31 exports a relatively low voltage, the demand of low-power consumption when meeting system standby.Output controls letter
Number EN has two states (effectively and invalid), and different states is used for controlling Boost DC/DC conversion
Device 31 produces the output voltage Vo of different magnitude of voltage.
Fig. 4 is the work wave schematic diagram of Fig. 3 shown device, within the t0-t1 time period, it is not necessary to send letter
Number, control signal EN that control circuit 33 produces is low level signal, step-up DC-DC current transformer 31
The output voltage Vo produced is relatively low voltage V2；In the t1-t2 stage, control circuit 33 detects input
Signal, needs to send signal, and in this stage, output control signal EN that control circuit 33 produces is high
Level signal, the output voltage Vo that step-up DC-DC current transformer 31 produces is higher voltage V1, makes
The electric current that must flow through transmitting tube 32 meets setting requirement, reaches the emissive porwer of requirement, in the t1-t2 stage,
Control circuit 33 is by controlling the turn-on and turn-off of switch S1, with certain frequency and dutycycle so that send out
Penetrate pipe 32 and be sent out signal with the agreement of agreement.
The physical circuit of a kind of step-up DC-DC current transformer is shown with reference to Fig. 5, Fig. 5, including: inductance
L, its first end is for connecting the positive pole of battery；First switching tube Q1, its first end connects the second of inductance L
End, its second end is for connecting the negative pole of battery, and it controls end and receives the first control signal Vgs1；Second switch
Pipe Q2, its first end connects second end of inductance L, and it controls end and receives the second control signal Vgs2；Output electricity
Holding Co, its first end connects second end of second switch pipe Q2, and its second end connects the of the first switching tube Q1
Two ends；First feedback resistance Rfb1, its first end connects second end of second switch pipe Q2；Output voltage feeds back
Circuit 51, its input port connects the second end and second end of the first feedback resistance Rfb1 of output capacitance Co,
This output voltage feedback circuit 51 voltage based on input port obtains error signal VEA；PWM circuit
52, its input connect output voltage feedback circuit 51 outfan to receive this error signal VEA, this PWM
Modulation circuit 52 carries out pulsewidth modulation according to this error signal VEA, to produce the first control signal Vgs and
Two control signals Vgs2；With door AND1, its first input end connects the outfan of PWM circuit 52,
Its second input receives control signal EN.
As a nonrestrictive example, the first switching tube Q1 can be the MOSFET pipe of N-type, second
Switching tube Q2 can be the MOSFET pipe of p-type.Certainly, those skilled in the art can also use other classes
The switching tube of type realizes identical function, such as JFET pipe etc..It addition, in the example shown in Fig. 5, the
Two switching tube Q2 can also be diode, and Fig. 5 uses p-type MOSFET pipe to be a kind of preferably scheme, can
Obtain higher conversion efficiency, namely synchronous rectification.
Furthermore, this output voltage feedback circuit 51 may include that the first operational amplifier 511, and it is years old
One input connects second end of the first feedback resistance Rfb1, and its second end receives the reference voltage Ref preset；
Second feedback resistance Rfb2, its first end connects the second end of output capacitance Co, and its second end connects the first computing
The first input end of amplifier 511；First electric capacity C1, its first end connects the of the first operational amplifier 511
One input；First resistance R1, its first end connects second end of the first electric capacity C1, and its second end connects the
The outfan of one operational amplifier 511.
This PWM circuit 52 may include that the second operational amplifier 521, and its first input end connects defeated
Going out the outfan of voltage feedback circuit 51 to receive this error signal VEA, its second end receives the pulse letter preset
Number.
In example shown in Fig. 5, this step-up DC-DC current transformer can use voltage mode control.Certainly,
It will be appreciated by those skilled in the art that this current transformer can also use conventional Controlled in Current Mode and Based (such as peak point current
Control or Average Current Control), above-mentioned voltage mode controls and Controlled in Current Mode and Based is common sense in the field, this
In repeat no more.
In example shown in Fig. 5, output voltage feedback circuit 51, based on output voltage negative feedback, obtains error letter
Number VEA, this error signal VEA obtains pwm control signal by PWM circuit 52, is used for controlling
Make the turn-on and turn-off of the first switching tube Q1, to obtain desired output voltage.The second of second switch pipe Q2
First control signal Vgs1 of control signal Vgs2 and the first switching tube Q1 is complementary, that is, at the first switching tube
Q1 opens period second switch pipe Q2 and turns off, second switch pipe Q2 conducting during the first switching tube Q1 turns off.
It addition, the first control signal Vgs1 and the second control signal Vgs2 complementation can also include the first control signal Vgs1
And second situation adding suitable Dead Time between control signal Vgs2, this Dead Time can be by Dead Time
Circuit 53 provides.Specifically, close at the first switching tube Q1 and have no progeny, through suitable Dead Time, second
Switching tube Q2 just turns on；And close at second switch pipe Q2 and have no progeny, through suitable Dead Time, the first switch
Pipe Q1 just turns on, and arranges suitable Dead Time and is possible to prevent two switching tube Q1 and Q2 to simultaneously turn on to cause
Short circuit.Wherein, the realization of Dead Time is a kind of common knowledge to those skilled in the art, the most no longer
Repeat.
In example shown in Fig. 5, when needs send signal, such as when the key-press input signal of outside being detected,
Control signal EN effectively (for example, high level), with door AND1 by the first control signal Vgs1 transmission to the
The control end of one switching tube Q1, for controlling the second control signal Vgs2 and first control of second switch pipe Q2
Signal Vgs1 processed is complementary, and this step-up DC/DC current transformer normally works, and obtains output voltage Vo, the most defeated
Going out voltage Vo is of a relatively high predeterminated voltage (the most aforementioned first voltage).This predeterminated voltage is by reference voltage
Ref and the first feedback resistance Rfb1 and the second feedback resistance Rfb2 determines, certainly, in some application scenarios also
Can there is no feedback resistance.
When without sending signal, such as, when being not detected by the key-press input signal of outside, control signal EN is invalid
(for example, low level), for control the first switching tube Q1 the first control signal Vgs1 by with door AND1
Block, the first switching tube Q1 turns off always, and pipe Q2 is constantly on for second switch, and second switch pipe Q2 is by defeated
Enter voltage (the namely voltage of battery) to transmit to output port, the magnitude of voltage of output voltage Vo and input voltage
Substantially consistent (the most not considering inductance L and the pressure drop of second switch pipe Q2), output voltage Vo now
Magnitude of voltage be relatively low magnitude of voltage (the most aforementioned second voltage), this step-up DC/DC current transformer is operated in side
Road (bypass) state.
The physical circuit of another kind of step-up DC-DC current transformer is shown with reference to Fig. 6, Fig. 6, including: electricity
Sense L, its first end is for connecting the positive pole of battery；First switching tube Q1, its first end connects the of inductance L
Two ends, its second end is for connecting the negative pole of this battery, and it controls end and receives the first control signal Vgs1；Second
Switching tube Q2, its first end connects second end of inductance L, and it controls end and receives the second control signal Vgs2, the
One control signal Vgs1 and the second control signal Vgs2 are complementary；Output capacitance Co, its first end connects second and opens
Closing second end of pipe Q2, its second end connects second end of the first switching tube Q1；First feedback resistance Rfb1,
Its first end connects second end of second switch pipe Q2；Output voltage feedback circuit 61, its input port connects defeated
Going out the second end and second end of the first feedback resistance Rfb1 of electric capacity Co, this output voltage feedback circuit 61 is in control
Under the control of signal EN processed, voltage based on input port obtains error signal VEA；PWM circuit 62,
The outfan of its input connection output voltage feedback circuit 61 is to receive this error signal VEA, and this PWM adjusts
Circuit 62 processed carries out pulsewidth modulation to produce the first control signal Vgs1 and the second control according to this error signal VEA
Signal Vgs2 processed.
Wherein, this output voltage feedback circuit 61 includes: the first operational amplifier 611, and its first input end is even
Connecing second end of the first feedback resistance Rfb1, its second end receives the reference voltage Ref preset；Second feedback electricity
Resistance Rfb2, its first end connects the second end of output capacitance Co, and its second end connects the first operational amplifier 611
First input end；Feedback switch Q3, its first end connects first end of the second feedback resistance Rfb2, and it controls
End receives control signal EN；3rd feedback resistance Rfb3, its first end connects second end of feedback switch Q3,
Its second end connects second end of the second feedback resistance Rfb2；First electric capacity C1, its first end connects the first computing
The first input end of amplifier 611；First resistance R1, its first end connects second end of the first electric capacity C1,
Its second end connects the outfan of the first operational amplifier 611.
This PWM circuit includes: the second operational amplifier 621, and its first input end connects output voltage
The outfan of feedback circuit 61, its second end receives the pulse signal preset.
As the example class shown in Fig. 5, the example of Fig. 6 can also use dead time circuit 63 in the first control
Suitable Dead Time is added between signal Vgs1 processed and the second control signal Vgs2.
Example shown in Fig. 6 regulates the intrinsic standoff ratio of feedback by control signal EN, regulates output with this
The magnitude of voltage of voltage.Furthermore, when control signal EN is effective (for example, high level), feedback
Switch Q3 Guan Bi, the magnitude of voltage of output voltage is of a relatively high, is the first voltage；When control signal EN without
During effect (such as low level), feedback switch Q3 disconnects, and the magnitude of voltage of output voltage is relatively low, is the
Two voltages.
The circuit structure of a kind of step-down DC-DC current transformer is shown, shown in Fig. 3 with reference to Fig. 7, Fig. 7
DC/DC conversion circuit 31 can also use this circuit structure.Specifically, this circuit structure includes:
Second switch pipe Q2, its first end connects the positive pole of battery, and it controls end and receives the second control signal Vgs2；
First switch Q1, its first end connects second end of second switch Q2, and its second end connects the negative pole of battery,
It controls end and receives the first control signal Vgs1；Inductance L, the second switch pipe Q2's that its first end connects
Second end；Output capacitance Co, its first end connects second end of inductance L, and its second end connects first and opens
Close second end of pipe Q1；First feedback resistance Rfb1, its first end connects the first end of output capacitance Co；
Output voltage feedback circuit 71, its input port connects the second end and first feedback resistance of output capacitance Co
Second end of Rfb1, this output voltage feedback circuit 71 is based on input port under the control of control signal EN
Voltage obtains error signal VEA；PWM circuit 72, its input connects output voltage feedback circuit 71
Outfan to receive this error signal VEA, this PWM circuit 72 enters according to this error signal VEA
Row pulsewidth modulation, produces the first control signal Vgs and the second control signal Vgs2 via not gate NOT.
Wherein, this output voltage feedback circuit 71 includes: the first operational amplifier 711, and its first input end is even
Connecing second end of the first feedback resistance Rfb1, its second end receives the reference voltage Ref preset；Second feedback electricity
Resistance Rfb2, its first end connects the second end of output capacitance Co, and its second end connects the first operational amplifier 711
First input end；Feedback switch Q3, its first end connects first end of the second feedback resistance Rfb2, and it controls
End receives control signal EN；3rd feedback resistance Rfb3, its first end connects second end of feedback switch Q3,
Its second end connects second end of the second feedback resistance Rfb2；First electric capacity C1, its first end connects the first computing
The first input end of amplifier 711；First resistance R1, its first end connects second end of the first electric capacity C1,
Its second end connects the outfan of the first operational amplifier 711.
This PWM circuit includes: the second operational amplifier 721, and its first input end connects output voltage
The outfan of feedback circuit 71, its second end receives the pulse signal preset.
Similar with the example shown in Fig. 5, Fig. 6, in the example of Fig. 7, dead time circuit 73 can be used to exist
Suitable Dead Time is added between first control signal Vgs1 and the second control signal Vgs2.
Example shown in Fig. 7 regulates the intrinsic standoff ratio of feedback by control signal EN, regulates output with this
The magnitude of voltage of voltage.Furthermore, when control signal EN is effective (for example, high level), feedback
Switch Q3 Guan Bi, the magnitude of voltage of output voltage is of a relatively high, is the first voltage；When control signal EN without
During effect (such as low level), feedback switch Q3 disconnects, and the magnitude of voltage of output voltage is relatively low, is the
Two voltages.
The circuit structure of another kind of step-down DC-DC current transformer is shown, shown in Fig. 3 with reference to Fig. 8, Fig. 8
DC/DC conversion circuit 31 can also use this circuit structure.Specifically, this circuit structure includes:
Second switch pipe Q2, its first end connects the positive pole of battery, and it controls end and receives the second control signal Vgs2；
First switch Q1, its first end connects second end of second switch Q2, and its second end connects the negative pole of battery,
It controls end and receives the first control signal Vgs1；Inductance L, the second switch pipe Q2's that its first end connects
Second end；Output capacitance Co, its first end connects second end of inductance L, and its second end connects first and opens
Close second end of pipe Q1；First feedback resistance Rfb1, its first end connects the first end of output capacitance Co；
Output voltage feedback circuit 81, its input port connects the second end and first feedback resistance of output capacitance Co
Second end of Rfb1, this output voltage feedback circuit 11 voltage based on input port obtains error signal VEA；
PWM circuit 82, its input connects the outfan of output voltage feedback circuit 81 to receive this error letter
Number VEA, this PWM circuit 82 carries out pulsewidth modulation according to this error signal VEA, via not gate NOT
And produce the first control signal Vgs and the second control signal Vgs2 with door AND1.
Furthermore, this output voltage feedback circuit 81 may include that the first operational amplifier 811, and it is years old
One input connects second end of the first feedback resistance Rfb1, and its second end receives the reference voltage Ref preset；
Second feedback resistance Rfb2, its first end connects the second end of output capacitance Co, and its second end connects the first computing
The first input end of amplifier 811；First electric capacity C1, its first end connects the of the first operational amplifier 811
One input；First resistance R1, its first end connects second end of the first electric capacity C1, and its second end connects the
The outfan of one operational amplifier 811.
This PWM circuit 82 may include that the second operational amplifier 821, and its first input end connects defeated
Going out the outfan of voltage feedback circuit 51 to receive this error signal VEA, its second end receives the pulse letter preset
Number.
With previous examples similarly, the example of Fig. 8 can also use dead time circuit 83 in the first control signal
Suitable Dead Time is added between Vgs1 and the second control signal Vgs2.
In example shown in Fig. 8, when needs send signal, such as when the key-press input signal of outside being detected,
Control signal EN effectively (for example, high level), with door AND1 by the first control signal Vgs1 transmission to the
The control end of one switching tube Q1, for controlling the second control signal Vgs2 and first control of second switch pipe Q2
Signal Vgs1 processed is complementary, and this voltage-dropping type DC/DC current transformer normally works, and obtains output voltage Vo, the most defeated
Going out voltage Vo is predeterminated voltage (the most aforementioned first voltage).This predeterminated voltage is by reference voltage Ref and first
Feedback resistance Rfb1 and the second feedback resistance Rfb2 determines, certainly, can also not feed back in some application scenarios
Resistance.
When without sending signal, such as, when being not detected by the key-press input signal of outside, control signal EN is invalid
(for example, low level), for control the first switching tube Q1 the first control signal Vgs1 by with door AND1
Block, the first switching tube Q1 turns off always, and pipe Q2 is constantly on for second switch, and second switch pipe Q2 is by defeated
Enter voltage (the namely voltage of battery) to transmit to output port, the magnitude of voltage of output voltage Vo and input voltage
Substantially consistent (the most not considering inductance L and the pressure drop of second switch pipe Q2), owing to being step-down applications, this
Time the magnitude of voltage of output voltage Vo be higher magnitude of voltage (aforementioned second voltage), this voltage-dropping type DC/DC
Current transformer is operated in bypass (bypass) state.
With reference to Fig. 9, Fig. 9 show shown in Fig. 3 make battery-powered device use step-down type dc/
Working waveform figure during direct current power transformation road (the such as circuit structure shown in Fig. 8).Within the t0-t1 time period,
Without sending signal, control signal EN that control circuit 33 produces is low level signal, voltage-dropping type DC/DC
The output voltage Vo that current transformer 31 produces is higher voltage V2；In the t1-t2 stage, control circuit 33
Input signal being detected, need to send signal, in this stage, the output that control circuit 33 produces controls
Signal EN is high level signal, and the output voltage Vo that step-down DC-DC converter 31 produces is relatively low
Voltage V1, in the t1-t2 stage, control circuit 33 is by controlling the turn-on and turn-off of switch S1, with one
Fixed frequency and dutycycle so that transmitting tube 32 is sent out signal with the agreement of agreement.
The circuit structure of a kind of buck DC/DC converter, Fig. 3 institute is shown with reference to Figure 10, Figure 10
The DC/DC conversion circuit 31 shown can also use this circuit structure.Specifically, this circuit structure bag
Include: second switch pipe Q2, its first end connect battery positive pole, this battery can be such as a batteries or
The battery of two joint series connection, it controls end and receives the second control signal Vgs2；First switch Q1, its first end
Connecting second end of second switch Q2, it controls end and receives the first control signal Vgs1；Inductance L, it is years old
Second end of the second switch pipe Q2 that one end connects, its second end connects the negative pole of battery；Output capacitance Co,
Its first end connects second end of the first switching tube Q1, and its second end connects the negative pole of battery；First feedback
Resistance Rfb1, its first end connects the first end of output capacitance Co；Output voltage feedback circuit 101, its
Input port connects the second end and second end of the first feedback resistance Rfb1 of output capacitance Co, this output electricity
Pressure feedback circuit 101 voltage based on input port under the control of control signal EN obtains error signal VEA；
PWM circuit 102, its input connects the outfan of output voltage feedback circuit 101 to receive this error
Signal VEA, this PWM circuit 102 carries out pulsewidth modulation according to this error signal VEA, via not gate
NOT produces the first control signal Vgs and the second control signal Vgs2.
Wherein, this output voltage feedback circuit 101 includes: the first operational amplifier 1011, its first input end
Connecting second end of the first feedback resistance Rfb1, its second end receives the reference voltage Ref preset；Second feedback
Resistance Rfb2, its first end connects the second end of output capacitance Co, and its second end connects the first operational amplifier
The first input end of 1011；Feedback switch Q3, its first end connects first end of the second feedback resistance Rfb2,
It controls end and receives control signal EN；3rd feedback resistance Rfb3, its first end connects the of feedback switch Q3
Two ends, its second end connects second end of the second feedback resistance Rfb2；First electric capacity C1, its first end connects the
The first input end of one operational amplifier 1011；First resistance R1, its first end connects the of the first electric capacity C1
Two ends, its second end connects the outfan of the first operational amplifier 1011.
This PWM circuit includes: the second operational amplifier 1021, and its first input end connects output voltage
The outfan of feedback circuit 101, its second end receives the pulse signal preset.
Similar with each example aforementioned, in the example of Figure 10, dead time circuit 103 can be used in the first control
Suitable Dead Time is added between signal Vgs1 processed and the second control signal Vgs2.
Example shown in Figure 10 regulates the intrinsic standoff ratio of feedback by control signal EN, regulates output with this
The magnitude of voltage of voltage.Furthermore, when control signal EN is effective (for example, high level), feedback
Switch Q3 Guan Bi, the magnitude of voltage of output voltage is of a relatively high, is the first voltage；When control signal EN without
During effect (such as low level), feedback switch Q3 disconnects, and the magnitude of voltage of output voltage is relatively low, is the
Two voltages.
By upper, the embodiment of the present invention uses Boost DC/DC converting circuit by the boost in voltage of single battery
Be converted to stable output voltage so that the power supply of power circuit is not changed by cell voltage to be affected.
Coordinating typical case's application such as remote controller, the output voltage of this Boost DC/DC converting circuit can be full
Optimal value under foot transmitting tube power requirement.It addition, when without launching signal, this Boost DC/direct current
Change-over circuit to reduce standby current, can extend battery with the relatively low output voltage of output voltage values further
Cruising time.Certainly, the device of the present embodiment is not limited to remote controller, it is also possible to be that other various make electricity consumption
Battery-powered device.
It addition, the present embodiment additionally provides a kind of method of supplying power to making battery-powered device, including walking as follows
Rapid:
Detection input signal, and produce the control signal for indicating this device duty based on this input signal；
Use DC/DC conversion circuit, according to this control signal, the voltage at battery two ends is converted to output voltage,
If described control signal indicates this device to be non-standby state, the magnitude of voltage of the most described output voltage is the first voltage,
If described control signal indicates this device to be holding state, the magnitude of voltage of the most described output voltage for be different from this first
Second voltage of voltage；
Described output voltage is transmitted to power circuit, to power to described power circuit.
Preferably, this first voltage is more than this second voltage.Such as, with reference to Fig. 3, as a example by remote controller, permissible
Use Boost DC/DC converting circuit 31 that the boost in voltage at battery 30 two ends is converted to output voltage Vo,
The magnitude of voltage of this output voltage Vo is determined by the duty of device, when device needs to send signal, and output electricity
The magnitude of voltage of pressure Vo is the first of a relatively high voltage, when device is standby, when namely need not send signal,
The magnitude of voltage of output voltage Vo is the second relatively low voltage.
Certainly, the method is not limited to remote controller, it is also possible to using the method is that other battery powered devices enter
Row power supply.
In some battery powered application scenarios, as used lithium battery power supply, the voltage of battery power supply itself is relatively
Height, the voltage range of single lithium battery is usually 3V～4.2V, higher than the voltage needed for load.As being applied to
The occasion of above-mentioned remote controller, its supply voltage also exceeds a lot than transmitting tube required voltage, at cell voltage
Time higher, the electric current flowing through transmitting tube is very big, increases the consumption of battery；In order to limit the electric current of transmitting tube,
Transmitting tube is also required to the current-limiting resistance Rs in previous embodiment that connects, and introduces extra loss.And this type of should
In with, the energy content of battery is mainly launched this class load consumption of pipe.Therefore, battery power supply mode is the most very
The most energy-conservation.Thought based on the present invention, in the diagram shown in figure 3, available step-down type dc/direct current
Change-over circuit realizes making full use of of battery capacity, such as Buck current transformer.
Use a kind of embodiment of step-down type dc/DC transfer circuit as shown in Figure 7.Different at device
Mode of operation under, export different voltage, when needs are launched, it is provided that the first voltage V1, without send out
When penetrating, it is provided that the second voltage V2, its steady operation waveform is the most as shown in Figure 4.
Power higher at battery and use in step-down type dc/DC converting circuit, as previously described, because device
In main current consuming apparatus be the load of transmitting tube etc, therefore, provide when needing to launch one applicable
Voltage V1, so that the electric current flowing through transmitting tube reaches setting value, this setting value can be to meet to launch by force
The minimum current that degree requires.And when being not detected by input signal, namely when no signal sends, nothing
Electric current flows through transmitting tube, and main current consuming apparatus is closed, and therefore, the height of supply voltage has no effect on system
Power consumption, i.e. provides a high voltage also will not increase the power consumption of device.As another embodiment, even
Higher cell voltage can be directly utilized power, further by closing step-down DC-DC converter
Reduction power consumption, as shown in Figure 8, steady operation waveform is as it is shown in figure 9, now the second voltage for its embodiment
Higher than the first voltage.
In some application systems, battery power voltage may ratio required for primary electricity using device (load)
Voltage is high or low.As used the remote controller of binodal dry cell power supply, required for cell voltage ratio load
Time low (after battery uses a period of time), battery remaining power cannot utilize.In order to make full use of aneroid battery
Capacity, in the embodiment shown in Fig. 3 (power supply is two batteries), buck-boost type direct current can be used
/ DC converting circuit is implemented, and its embodiment is as shown in Figure 10.Buck DC/DC conversion circuit no matter
Input voltage size, the most convertible magnitude of voltage obtaining a setting, this magnitude of voltage can be higher than input voltage
Or it is low.When needs are launched, it is provided that a first voltage V1, when without launching, it is provided that one second
Voltage V2, its steady operation waveform is the most as shown in Figure 4.
In a word, no matter description is the most detailed, also can implement the present invention in many ways.Institute in description
State only the one or more of the present invention and be embodied as example, be not exhaustive or for by the present invention
It is limited in above-mentioned clear and definite formal.Above-mentioned with schematic purpose explanation only certain embodiments of the present invention and reality
While example, it would be recognized by those skilled in the art that can carry out various equivalent within the scope of the invention repaiies
Changing, the details of circuit structure and control mode thereof can carry out considerable change in it performs details.All
Change, within all should being under the jurisdiction of protection scope of the present invention according to any equivalence that essence of the present invention is made.
Present invention enlightenment provided here is not necessarily applied in said system, it is also possible to be applied to it
In its system, more embodiment can be produced.Therefore, the actual range of the present invention not only includes disclosed
Embodiment, be additionally included under claims all equivalents being practiced or carried out the present invention.
Claims (12)
1. one kind makes battery-powered device, it is characterised in that including:
Control circuit, is used for detecting input signal, and is used for indicating this device to work based on the generation of this input signal
The control signal of state；
DC/DC conversion circuit, its input port is for connecting positive pole and the negative pole of battery, and this DC-DC turns
Change circuit and receive described control signal, the input voltage of described input port is converted to output voltage, in response to institute
Stating control signal indicates this device to be non-standby state, the output voltage that described DC/DC conversion circuit produces
Magnitude of voltage is the first voltage, indicates this device to be holding state in response to described control signal, the most described direct current/straight
The magnitude of voltage of the output voltage that stream change-over circuit produces is the second voltage being different from this first voltage；
Power circuit, is connected with the output port of described DC/DC conversion circuit to receive described output voltage,
Wherein, described power circuit is signal sending circuit, and this power circuit includes transmitting tube, and its anode connects
First end of the output port of described DC/DC conversion circuit,
This control circuit has I/O end and ground end, and this I/O end connects the negative electrode of described transmitting tube, and this ground end connects
Second end of described output port, described control circuit includes:
Switch, its first end connects described I/O end, and its second end connects described ground end；
Testing circuit, is used for detecting this input signal, produces when this input signal being detected and sends control letter
Number, the control end of this transmission control signal transmission to described switch is to control the turn-on and turn-off of described switch, not
Described transmission control signal is not produced when described input signal being detected.
The most according to claim 1 make battery-powered device, it is characterised in that described testing circuit
Producing described control signal always according to described input signal, when this input signal being detected, described control signal has
Effect, when being not detected by described input signal, described control signal is invalid；
Described DC/DC conversion circuit is controlled by described control signal, when described control signal is effective, described
The magnitude of voltage of output voltage is described first voltage, when described control signal is invalid, and the voltage of described output voltage
Value is described second voltage.
The most according to any one of claim 1 to 2 make battery-powered device, it is characterised in that
Described DC/DC conversion circuit is Boost DC/DC transformer, step-down type dc/DC transformer or lifting
Die mould DC/DC converter.
The most according to claim 2 make battery-powered device, it is characterised in that described DC-DC
Change-over circuit includes:
Inductance, its first end is for connecting the positive pole of described battery；
First switching tube, its first end connects the second end of described inductance, and its second end is used for connecting described battery
Negative pole, its control end receive the first control signal；
Second switch pipe, its first end connects the second end of described inductance, and it controls end and receives the second control signal；
Output capacitance, its first end connects the second end of described second switch pipe, and its second end connects described first
Second end of switching tube；
First feedback resistance, its first end connects the second end of described second switch pipe；
Output voltage feedback circuit, its input port connects the first end and second end of described output capacitance, and this is defeated
Go out voltage feedback circuit output voltage based on described output capacitance two ends and obtain error signal；
PWM circuit, its input connects the outfan of described output voltage feedback circuit to receive this error
Signal, this PWM circuit according to this error signal carry out pulsewidth modulation with produce described first control signal and
Second control signal；
With door, its first input end connects the outfan of described PWM circuit, and its second input receives
Described output control signal.
The most according to claim 4 make battery-powered device, it is characterised in that described output voltage
Feedback circuit includes:
First operational amplifier, its first input end connects the second end of described first feedback resistance, its second end
Receive the reference voltage preset；
Second feedback resistance, its first end connects the second end of described output capacitance, and its second end connects described the
The first input end of one operational amplifier；
First electric capacity, its first end connects the first input end of described first operational amplifier；
First resistance, its first end connects the second end of described first electric capacity, and its second end connects described first fortune
Calculate the outfan of amplifier.
The most according to claim 2 make battery-powered device, it is characterised in that described DC-DC
Change-over circuit includes:
Inductance, its first end is for connecting the positive pole of described battery；
First switching tube, its first end connects the second end of described inductance, and its second end is used for connecting described battery
Negative pole, its control end receive the first control signal；
Second switch pipe, its first end connects the second end of described inductance, and it controls end and receives the second control signal,
Described first control signal and the second control signal are complementary；
Output capacitance, its first end connects the second end of described second switch pipe, and its second end connects described first
Second end of switching tube；
First feedback resistance, its first end connects the second end of described second switch pipe；
Output voltage feedback circuit, its input port connects the first end and second end of described output capacitance, and this is defeated
Go out voltage feedback circuit output voltages based on described output capacitance two ends under the control of described output control signal
Obtain error signal；
PWM circuit, its input connects the outfan of described output voltage feedback circuit to receive this error
Signal, this PWM circuit according to this error signal carry out pulsewidth modulation with produce described first control signal and
Second control signal.
The most according to claim 6 make battery-powered device, it is characterised in that described output voltage
Feedback circuit includes:
First operational amplifier, its first input end connects the second end of described first feedback resistance, its second end
Receive the reference voltage preset；
Second feedback resistance, its first end connects the second end of described output capacitance, and its second end connects described the
The first input end of one operational amplifier；
Feedback switch, its first end connects the first end of described second feedback resistance, and it controls end and receives described defeated
Go out control signal；
3rd feedback resistance, its first end connects the second end of described feedback switch, and its second end connects described the
Second end of two feedback resistances；
First electric capacity, its first end connects the first input end of described first operational amplifier；
First resistance, its first end connects the second end of described first electric capacity, and its second end connects described first fortune
Calculate the outfan of amplifier.
8. according to making battery-powered device according to any one of claim 4 to 7, it is characterised in that
Described PWM circuit includes:
Second operational amplifier, its first input end connects the outfan of described output voltage feedback circuit, and it is the years old
Two ends receive the pulse signal preset.
9. according to claim 1 to 2, making battery-powered device according to any one of 4 to 7, it is special
Levying and be, the input port of described DC/DC conversion circuit is for connecting positive pole and the negative pole of same battery.
10. according to claim 1 to 2, making battery-powered device according to any one of 4 to 7, it is special
Levying and be, described first voltage is more than described second voltage.
11. 1 kinds of method of supplying power to making battery-powered device, it is characterised in that including:
Control circuit detection input signal also produces the control for indicating this device duty based on this input signal
Signal processed；
Use DC/DC conversion circuit, according to this control signal, the voltage at battery two ends is converted to output voltage,
If described control signal indicates this device to be non-standby state, the magnitude of voltage of the most described output voltage is the first voltage,
If described control signal indicates this device to be holding state, the magnitude of voltage of the most described output voltage for be different from this first
Second voltage of voltage；
Described output voltage is transmitted to power circuit, to power to described power circuit,
Wherein, described power circuit is signal sending circuit, and this power circuit includes transmitting tube, and its anode connects
First end of the output port of described DC/DC conversion circuit,
This control circuit has I/O end and ground end, and this I/O end connects the negative electrode of described transmitting tube, and this ground end connects
Second end of described output port, described control circuit includes:
Switch, its first end connects described I/O end, and its second end connects described ground end；
Testing circuit, is used for detecting this input signal, produces when this input signal being detected and sends control letter
Number, the control end of this transmission control signal transmission to described switch is to control the turn-on and turn-off of described switch, not
Described transmission control signal is not produced when described input signal being detected.
12. method of supplying power to according to claim 11, it is characterised in that described first voltage is more than described
Second voltage.
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| CN109450019A (en) * | 2018-11-06 | 2019-03-08 | 郑州云海信息技术有限公司 | A kind of super capacitor mould group and storage system |
| CN111740588A (en) * | 2019-03-25 | 2020-10-02 | 罗富尧 | Built-in voltage multiplier in microcontroller unit of single battery remote controller for long distance infrared and low power consumption Bluetooth low energy transmission |
| CN110658468B (en) * | 2019-09-17 | 2021-12-07 | 安徽容知日新科技股份有限公司 | Battery state detection device |
| CN116470620A (en) * | 2023-05-13 | 2023-07-21 | 深圳市汇一技研有限公司 | Discharging circuit, battery management module, power supply module and electric equipment |
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| CN1925298A (en) * | 2005-08-30 | 2007-03-07 | 厦门华侨电子企业有限公司 | Middle and large power switch electrical source for no-standby electrical source in electrical source system |
| CN102904444A (en) * | 2012-08-07 | 2013-01-30 | 上海交通大学 | DC/DC (direct-current/direct-current) conversion and control system based on proton exchange membrane fuel cell |
| CN203984025U (en) * | 2014-04-28 | 2014-12-03 | 杭州士兰微电子股份有限公司 | Make battery-powered device |
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| CN103944233A (en) | 2014-07-23 |
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