CN106094959B - Linear voltage-stabilizing circuit - Google Patents
Linear voltage-stabilizing circuit Download PDFInfo
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- CN106094959B CN106094959B CN201610460171.1A CN201610460171A CN106094959B CN 106094959 B CN106094959 B CN 106094959B CN 201610460171 A CN201610460171 A CN 201610460171A CN 106094959 B CN106094959 B CN 106094959B
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- 239000004065 semiconductor Substances 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 14
- 230000005611 electricity Effects 0.000 claims description 13
- 230000006641 stabilisation Effects 0.000 abstract description 3
- 238000011105 stabilization Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
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- 230000004048 modification Effects 0.000 description 2
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- 238000012512 characterization method Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is DC
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices
- G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
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- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
The invention discloses a kind of linear voltage-stabilizing circuits, including linear power dioxde and its drive control circuit, and the linear power dioxde receives input voltage, by drive control circuit linear adjustment power tube, to export preset output voltage；The linear power dioxde includes the first power end, the second power end and control terminal, the drive control circuit includes feeder ear, driving end, first end and second end, one end of the feeder ear and input voltage connects, the voltage of feeder ear is clamped to supply voltage, and the supply voltage is less than input voltage；The control terminal at the driving end and linear power dioxde connects, and the first end and second end of the drive control circuit is connected with the first power end of the linear power dioxde and the second power end respectively.In the present invention, the voltage that drive control circuit is born can be less than input or the output voltage of linear voltage stabilization.
Description
Technical field
The present invention relates to power electronics fields, and in particular to a kind of linear voltage-stabilizing circuit.
Background technology
As its name suggests, linear voltage-stabilizing circuit plays pressure stabilization function, that is, receives input voltage, exports expected output voltage.
The linear voltage-stabilizing circuit of the prior art is generally used for low voltage difference occasion, and input voltage and output voltage are relatively low.For example, low pressure
Difference linear constant voltage regulator (low dropout regulator, abbreviation LDO), is usually widely used in integrated circuit form.
As shown in Figure 1, for the linear voltage dropping circuit schematic diagram of the prior art.Input voltage passes through linear power dioxde M01, drop
Pressure obtains output voltage Vout.Output voltage obtains feedback voltage FB by feedback resistance R01, R02, and amplifier U01 passes through control
Linear power dioxde M01 so that feedback voltage FB is equal to internal reference voltage VREF.It is just as described above, the prior art scheme
Common scheme applied to low input and output voltage, and when input and output voltage pressure difference is smaller.
However, when input and output voltage is high pressure, hectovolt as above, then the grid of linear power dioxde is to being systematically up to a hundred
The high pressure of volt, therefore the driving circuit of linear power dioxde needs the high pressure of hectovolt, the driving of the linear power dioxde of the prior art
Circuit can not solve above-mentioned technical problem, affect application of the linear voltage-stabilizing circuit in high pressure field.
Invention content
In view of this, the purpose of the present invention is to provide a kind of linear voltage-stabilizing circuits suitable for high-voltage applications, to solve
It is certainly of the existing technology can not be the high pressure applications the technical issues of.
Technical solution of the invention is to provide a kind of linear voltage-stabilizing circuit with lower structure, including linear power dioxde
And its drive control circuit, the linear power dioxde receive input voltage, pass through drive control circuit linear adjustment power tube
On off state, to export preset output voltage；
The linear power dioxde includes the first power end, the second power end and control terminal, the drive control circuit
Including feeder ear, driving end, first end and second end, one end of the feeder ear and input voltage connects, the electricity of feeder ear
Pressure is clamped to supply voltage, and the supply voltage is less than input voltage；The control at the driving end and linear power dioxde
End connection, the first end and second end of the drive control circuit respectively with the first power end of the linear power dioxde and the
Two power ends are connected；Voltage between wherein one end and the first end of linear power dioxde of the input voltage is as output
Voltage.
Preferably, cold end of the cold end of the input voltage as output voltage, the of linear power dioxde
Hot end of one power end as output voltage, low electricity of the feeder ear through resistance and input voltage of the drive control circuit
The first end of the connection of position end, drive control circuit is also connected through the first power end of resistance and linear power dioxde, drive control electricity
The second end on road and the second power end of linear power dioxde connect and connect the hot end of input voltage.
Preferably, the electric current of the feeder ear is flowed out in detection, and the electric current of setting outflow drive control circuit first end is than stream
Go out small first current difference of electric current of the feeder ear, detects the voltage of drive control circuit first end, pass through drive control circuit
Its voltage for driving end is adjusted, with the driving voltage of linear adjustment power tube so that the input voltage and drive control circuit
The pressure difference of first end reaches predeterminated voltage, and the predeterminated voltage is equal to the reference voltage of drive control circuit.
Preferably, the electric current of the feeder ear is flowed out in detection, and the input voltage and drive control circuit first end is arranged
Pressure difference be predeterminated voltage, the predeterminated voltage be equal to drive control circuit reference voltage, detection outflow drive control electricity
The electric current of road first end adjusts its voltage for driving end by drive control circuit, with the driving voltage of linear adjustment power tube,
So that the electric current of outflow drive control circuit first end the first current difference smaller than the electric current for flowing out the feeder ear.
Preferably, the drive control circuit includes operational amplifier, and the output end of the operational amplifier is as institute
The driving end for the drive control circuit stated, the voltage of the feeder ear are clamped to supply voltage by first voltage source；Flow control is set
Current source, the second end of the flow control current source first end with the first end of drive control circuit and operational amplifier respectively
Connection, the hot end of the first termination input voltage of flow control current source, the size of the flow control current source is by flowing through power supply
The current control at end, and size of current is equal to the electric current current difference that subtracts the first for flowing through the feeder ear；The operational amplifier
Second end access the reference signal.
Preferably, the linear power dioxde is p-type metal-oxide-semiconductor, and first power end is the drain electrode of p-type metal-oxide-semiconductor, institute
The second power end stated is the source electrode of p-type metal-oxide-semiconductor, and the control terminal is the gate pole of p-type metal-oxide-semiconductor.
Preferably, hot end of the hot end of the input voltage as output voltage, the of linear power dioxde
Cold end of one power end as output voltage, height electricity of the feeder ear through resistance and input voltage of the drive control circuit
The first end of the connection of position end, drive control circuit is also connected through the first power end of resistance and linear power dioxde, drive control electricity
The second end on road and the second power end of linear power dioxde connect and connect the cold end of input voltage.
Preferably, detection flows into the electric current of the feeder ear, and setting flows into the electric current of drive control circuit first end than stream
Enter small first current difference of electric current of the feeder ear, detects the voltage of drive control circuit first end, pass through drive control circuit
Its voltage for driving end is adjusted, with the driving voltage of linear adjustment power tube so that the voltage of drive control circuit first end reaches
To predeterminated voltage, the predeterminated voltage is equal to the reference voltage of drive control circuit.
Preferably, detection flows into the electric current of the feeder ear, and the voltage of setting drive control circuit first end is default electricity
Pressure, the predeterminated voltage are equal to the reference voltage of drive control circuit, and detection flows into the electric current of drive control circuit first end,
Its voltage for driving end is adjusted by drive control circuit, with the driving voltage of linear adjustment power tube so that flow into driving control
The electric current of circuit first end processed the first current difference smaller than the electric current for flowing into the feeder ear.
Preferably, the drive control circuit includes operational amplifier, and the output end of the operational amplifier is as institute
The driving end for the drive control circuit stated, the voltage of the feeder ear are clamped to supply voltage by first voltage source；Flow control is set
Current source, the first end of the flow control current source first end with the first end of drive control circuit and operational amplifier respectively
Connection, the cold end of the second termination input voltage of flow control current source, the size of the flow control current source is by flowing through power supply
The current control at end, and size of current is equal to the electric current current difference that subtracts the first for flowing through the feeder ear；The operational amplifier
Second end access the reference signal.
Preferably, the linear power dioxde is N-type metal-oxide-semiconductor, and first power end is the drain electrode of N-type metal-oxide-semiconductor, institute
The second power end stated is the source electrode of N-type metal-oxide-semiconductor, and the control terminal is the gate pole of N-type metal-oxide-semiconductor.
Circuit structure using the present invention has the following advantages compared with prior art：Pass through clamper drive control circuit
Power supply terminal voltage, in the high-voltage linear regulator circuit of input and output altogether, feeder ear, first end and the drive of drive control circuit
These ports of moved end are all low pressure with respect to input voltage；The high-voltage linear regulator circuit in input and output common-battery source, Linear Driving
Feeder ear, first end and driving these ports of end of control circuit are all relatively low pressure.In the present invention, drive control circuit
Output constant pressure can be realized with low pressure process, so that linear voltage-stabilizing circuit is applied under high pressure occasion, drive control circuit institute
The voltage born can be less than input or the output voltage of linear voltage stabilization.
Description of the drawings
Fig. 1 is the circuit structure diagram of prior art linear voltage-stabilizing circuit；
Fig. 2 is the circuit structure diagram of linear voltage-stabilizing circuit embodiment one of the present invention；
Fig. 3 is the circuit structure diagram of drive control circuit in Fig. 2 embodiments one；
Fig. 4 is the circuit structure diagram of high-voltage linear regulator circuit embodiment two of the present invention；
Fig. 5 is the circuit structure diagram of drive control circuit in Fig. 4 embodiments two；
Specific implementation mode
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention is not restricted to these
Embodiment.The present invention covers any replacement made in the spirit and scope of the present invention, modification, equivalent method and scheme.
In order to make the public have thorough understanding to the present invention, it is described in detail in following present invention preferred embodiment specific
Details, and description without these details can also understand the present invention completely for a person skilled in the art.
The present invention is more specifically described by way of example with reference to attached drawing in the following passage.It should be noted that attached drawing is adopted
Use with more simplified form and non-accurate ratio, only to it is convenient, lucidly aid in illustrating the embodiment of the present invention
Purpose.
The basic implementation of the present invention is as follows：The linear voltage-stabilizing circuit of the present invention, including linear power dioxde and its driving
Control circuit, the linear power dioxde receive input voltage, pass through the switch shape of drive control circuit linear adjustment power tube
State, to export preset output voltage；The linear power dioxde includes the first power end, the second power end and control terminal, institute
The drive control circuit stated includes feeder ear, driving end, first end and second end, one end of the feeder ear and input voltage
The voltage of connection, feeder ear is clamped to supply voltage, and the supply voltage is less than input voltage；The driving end and line
Property power tube control terminal connection, the first end and second end of the drive control circuit respectively with the linear power dioxde
First power end and the second power end are connected；Between wherein one end and the first end of linear power dioxde of the input voltage
Voltage as output voltage.
Based on above-mentioned basic implementation, it is described in detail using two embodiments.Fig. 2 and Fig. 4 difference schematic diagrames are real
The circuit structure of example one and two is applied, the two is respectively implementation and the input of the high-voltage linear regulator circuit of input and output altogether
The implementation of the high-voltage linear regulator circuit in common-battery source is exported, and is based on same inventive concept, but physical circuit realizes have
Institute is different, and dexterously applies p-type metal-oxide-semiconductor and N-type metal-oxide-semiconductor, to coordinate corresponding application scenario.
Refering to what is shown in Fig. 2, illustrating the high-voltage linear regulator circuit of input and output altogether, explained as embodiment one
It states.The feeder ear VCC of drive control circuit is grounded through resistance R10, and feeder ear VCC is clamped to supply voltage, and the input
Voltage Vin and the pressure difference V10, the pressure difference pressure difference V10 of the supply voltage are definite value；Drive control circuit detection outflow VCC
Electric current i10, electric current the first current difference smaller than the electric current for flowing out the feeder ear of setting outflow drive control circuit first end.
The electric current i11=i10-I0 of its first end VS outflows is arranged in drive control circuit, and wherein I0 indicates the first current difference, and detects
The voltage of the first end VS of drive control circuit, by the driving voltage for adjusting p-type linear power dioxde M10 so that input voltage
The pressure difference V11 of Vin and VS is predeterminated voltage VREF1, and wherein predeterminated voltage VREF1 is the reference voltage of drive control circuit.
Alternatively, the pressure difference V11 of setting input voltage and VS are a fixed voltage VREF1, and detect the electric current of VS outflows
I11, by the driving voltage for adjusting p-type linear power dioxde M10 so that the electric current i11=i10-I0 of VS outflows.Linear power dioxde
M10 is p-type pipe, and G, D and S can characterize its grid, drain electrode and source electrode respectively.
Above is referred to the code name of letter and number all referred in attached drawing 2, but for the needs of elaboration, therefore give
To introduce, and convenient for the derivation of formula.Though in this way, but those of ordinary skill in the art can be known according to foregoing description, herein
It is explained.
The present embodiment one can make the principle of output constant pressure be in the case where receiving high input voltage：
Vin=i10*R10+V10；
Vin=Vout+i11*R11+V11；
Vout=i10*R10+V10- (i11*R11+V11)=i10*R10-i11*R11+V10-V11；
As R10=R11=R0, then Vout=(i10-i11) * R0+V10-V11=I0*R0+ (V10-V11).
Since I0 is the first current difference, the first current difference is definite value, and V10-V11 is also fixed voltage, by the way that resistance is arranged
R10=R11=R0 (it is believed that R0 is predeterminable resistance value) then can adjust output voltage by adjusting the size of R0.
Due to the feeder ear VCC of drive control circuit, first end VS, G these pins in end is driven (drive control circuit to be integrated in core
In piece, therefore pin can be referred to as) input voltage vin relatively is all low pressure, therefore linear drive control circuitry can use low pressure work
Skill realizes output constant pressure.
Refering to what is shown in Fig. 3, illustrating the particular circuit configurations of the respective drive control circuit based on Fig. 2, it is illustrated
The realization method of middle drive control circuit.But the drive control circuit of the present invention is not limited to the circuit structure of Fig. 3.As shown in figure 3,
VCC is by voltage source V50 clampers.The electric current i10 for flowing through VCC includes to the supply current i50 and voltage source of all remaining circuit U50
The electric current of V50.Remaining circuit indicated above is other circuits for needing VCC to power, and the necessary technology technology of non-present invention
Feature, it is unrelated with the realization of the present invention, therefore do not repeat, but the problems such as in order to illustrate voltage, current relationship, therefore is related in figure
And.
I50 is flow control current source, i.e., the size of current of I50 is controlled by the electric current i10 for flowing through VCC, and size of current is equal to
Electric current subtract the first current difference, i.e. I50=i10-I0 of the feeder ear is flowed through, I0 indicates the first current difference.The electricity of current control
One end of stream source I50 is connected with the positive input terminal of operational amplifier U51,.Due to flowing through the electricity of operational amplifier U51 positive input terminals
Stream is approximately 0, therefore the electric current i11=i52-I0=i10-I0 of the first end VS of drive control circuit (works as I0>When i10, then
I11=0, VS voltage are pulled down, and the output G of U51 is also pulled down, and linear power dioxde M10 is fully on).Operational amplifier U51 controls
The pressure difference of input voltage vin processed and VS voltages is equal to reference voltage VREF1.The output of operational amplifier U51 is connected to linear work(
The grid (also referred to as gate pole) of rate pipe M10, to drive linear power dioxde M10.
When output voltage Vout is less than I0*R0+ (V50-VREF1) (wherein, R10=R11=R0), then input voltage
The pressure difference of Vin and VS voltages is less than VREF1, and operational amplifier U51 drivings end G is lower, increases by the electric current of linear power dioxde M10
Add, to make output voltage increase；When output voltage is higher than I0*R0+ (V50-VREF1), then input voltage vin and VS voltages
Pressure difference be higher than VREF1, operational amplifier U51 output G gets higher, reduces by the electric current of linear power dioxde M10, to make output
Voltage reduces.Therefore, the pressure difference of input voltage vin and VS voltages is equal to the situation that VREF1 is default, but in this realization process
In, there is dynamic equilibrium, to realize output constant pressure.When V50 and VREF1 voltages are much smaller than input and output voltage, i.e. VCC
It is much smaller than input and output voltage with VS voltages, then output voltage is reduced to I0*R0, also can be approximately constant pressure.
Refering to what is shown in Fig. 4, illustrating the high-voltage linear regulator circuit in input and output common-battery source, explained as embodiment two
It states.For drive control circuit clamper VCC to supply voltage, the electric current that detection flows into VCC is i20.Drive control circuit setting flows into
The electric current i21=i20-I0 of its first end VS, wherein I0 indicate the first current difference, and detect VS voltages, by adjusting N-type line
Property power tube M20 driving voltage so that drive control circuit first end VS reaches predeterminated voltage VREF1, and wherein VREF1 is to drive
The reference voltage of dynamic control circuit.
Alternatively, setting drive control circuit first end VS is equal to predeterminated voltage VREF1, and detect inflow drive control circuit
The electric current i21 of first end VS, by the driving voltage for adjusting N-type linear power dioxde M20 so that drive control circuit first end VS
The electric current i21=i20-I0 of inflow.Linear power dioxde M20 is N-type pipe, and G, D and S can characterize its grid, drain electrode and source electrode respectively.
This method can make the principle of output constant pressure be：
Vin=i20*R20+VCC；
Vin=Vout+i21*R21+VS；
Vout=i20*R20+VCC- (i21*R21+VS)=i20*R20-i21*R21+VCC-VS；
As R20=R21=R0, then Vout=(i20-i21) * R0+VCC-VS=I0*R0+ (VCC-VS).
Since I0 is the first current difference, the first current difference is definite value, and VCC-VS is also fixed voltage, by the way that resistance is arranged
R20=R21=R0 then can adjust output voltage by adjusting the size of R0.Due to the VCC of linear drive control circuitry,
These pins of VS, G are all relatively low pressure, therefore linear drive control circuitry can realize output constant pressure with low pressure process,
Implementation method is simple, at low cost.
Refering to what is shown in Fig. 5, illustrating the particular circuit configurations of the respective drive control circuit based on Fig. 2, it is illustrated
The realization method of middle drive control circuit.The feeder ear VCC of drive control circuit powers to all circuits, and by voltage source V40
Clamper.The electric current i20 for then flowing through VCC includes to the electric current of the supply current i40 and voltage source V40 of all remaining circuit U40.
I40 be flow control current source, i.e., the size of current of I40 by VCC electric currents i20 control, and size of current be equal to flow through the feeder ear
Electric current subtract the first current difference, i.e. I40=i20-I0, I0 indicates the first current difference.One end of the current source I40 of current control and
The positive input terminal of operational amplifier U41 is connected.Electric current due to flowing through amplifier positive input terminal is approximately 0, VS electric currents i21=
I42-I0=i20-I0 (works as I0>When i20, then i21=0, VS voltages are pulled up, the output end G of U41 (i.e. drive control circuit
Driving end) also it is pulled up, linear power dioxde M20 is fully on).Operational amplifier U41 control VS voltages are equal to reference voltage
VREF1.The output of operational amplifier U41 is connected to the grid of linear power dioxde M20, drives M20.
When output voltage is less than I0*R0+ (V40-VREF1) (wherein, R20=R21=R0), then VS voltages are higher than
VREF1, operational amplifier U41 output ends G are got higher, and are increased by the electric current of linear power dioxde M20, and the drain voltage of M20 reduces,
To make output voltage increase；When output voltage is higher than I0*R0+ (V40-VREF1), then VS voltages are less than VREF1, and operation is put
Big device U41 output ends G is lower, and reduces by the electric current of linear power dioxde M20, and the drain voltage of M20 increases, to keep output electric
Pressure drop is low.Therefore, it is default situation that VS voltages, which are equal to VREF1, but during this realization, there is dynamic equilibrium, from
And realize output constant pressure.When V40 and VREF1 voltages are much smaller than input and output voltage, i.e., VCC and VS voltages are defeated much smaller than inputting
Go out voltage, then output voltage is reduced to I0*R0, also can be approximately constant pressure.
In above example, it is related to I40 and i40, I50 and i50 and characterizes different current forms, i40 and i50 characterization streams
The electric current of warp, and I40 and I50 then refer to the current source applied, are explained herein.In addition to this, although will implement above
Example is separately illustrated and illustrates, but is related to the common technology in part, in those of ordinary skill in the art, can embodiment it
Between be replaced and integrate, be related to one of embodiment be not known record content, then can refer to another reality on the books
Apply example.In addition, although the present invention is applied to for solving in the case of high input voltage so that drive control circuit is born than input electricity
The case where pressing lower voltage, but being equally applicable to low pressure input, that is to say, that since the present invention can be used as high-voltage line
Property regulator circuit, can be used for low-pressure linear regulator circuit.
Embodiments described above does not constitute the restriction to the technical solution protection domain.It is any in above-mentioned implementation
Modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution made by within the spirit and principle of mode
Within enclosing.
Claims (8)
1. a kind of linear voltage-stabilizing circuit, including linear power dioxde and its drive control circuit, the linear power dioxde receives defeated
Enter voltage, by drive control circuit linear adjustment power tube, to export preset output voltage；It is characterized in that：
The linear power dioxde includes the first power end, the second power end and control terminal, and the drive control circuit includes
One end of feeder ear, driving end, first end and second end, the feeder ear and input voltage connects, the voltage quilt of feeder ear
It is clamped to supply voltage, the supply voltage is less than input voltage；The control terminal at the driving end and linear power dioxde connects
Connect, the first end and second end of the drive control circuit respectively with the first power end of the linear power dioxde and the second work(
Rate end is connected；Voltage between wherein one end and the first end of linear power dioxde of the input voltage is as output electricity
Pressure；
The drive control circuit is integrated in chip；
Cold end of the cold end of the input voltage as output voltage, the first power end conduct of linear power dioxde
The feeder ear of the hot end of output voltage, the drive control circuit is connected through the cold end of resistance and input voltage, is driven
The first end of dynamic control circuit is also connected through the first power end of resistance and linear power dioxde, the second end of drive control circuit with
Second power end of linear power dioxde connects and connects the hot end of input voltage；
The electric current of the feeder ear is flowed out in detection, and the electric current of setting outflow drive control circuit first end is than flowing out the feeder ear
Small first current difference of electric current, detect drive control circuit first end voltage, by drive control circuit adjust its drive end
Voltage, with the driving voltage of linear adjustment power tube so that the pressure difference of the input voltage and drive control circuit first end
Reach predeterminated voltage, the predeterminated voltage is equal to the reference voltage of drive control circuit.
2. linear voltage-stabilizing circuit according to claim 1, it is characterised in that：The electric current of the feeder ear is flowed out in detection, if
The pressure difference for setting the input voltage and drive control circuit first end is predeterminated voltage, and the predeterminated voltage is equal to drive control
The reference voltage of circuit, the electric current of detection outflow drive control circuit first end adjust it by drive control circuit and drive end
Voltage, with the driving voltage of linear adjustment power tube so that outflow drive control circuit first end electric current than outflow described in
Small first current difference of electric current of feeder ear.
3. linear voltage-stabilizing circuit according to claim 1, it is characterised in that：The drive control circuit includes that operation is put
Big device, the driving end of the output end of the operational amplifier as the drive control circuit, the voltage of the feeder ear by
First voltage source is clamped to supply voltage；Flow control current source is set, and the second end of the flow control current source is controlled with driving respectively
The first end of circuit processed is connected with the first end of operational amplifier, the high potential of the first termination input voltage of flow control current source
End, the size of the flow control current source is by flowing through the current control of feeder ear, and size of current is equal to and flows through the feeder ear
The electric current current difference that subtracts the first；The second end of the operational amplifier accesses the reference voltage.
4. linear voltage-stabilizing circuit according to claim 1,2 or 3, it is characterised in that：The linear power dioxde is p-type
Metal-oxide-semiconductor, first power end are the drain electrode of p-type metal-oxide-semiconductor, and second power end is the source electrode of p-type metal-oxide-semiconductor, described
Control terminal is the gate pole of p-type metal-oxide-semiconductor.
5. a kind of linear voltage-stabilizing circuit, including linear power dioxde and its drive control circuit, the linear power dioxde receives defeated
Enter voltage, by drive control circuit linear adjustment power tube, to export preset output voltage；It is characterized in that：
The linear power dioxde includes the first power end, the second power end and control terminal, and the drive control circuit includes
One end of feeder ear, driving end, first end and second end, the feeder ear and input voltage connects, the voltage quilt of feeder ear
It is clamped to supply voltage, the supply voltage is less than input voltage；The control terminal at the driving end and linear power dioxde connects
Connect, the first end and second end of the drive control circuit respectively with the first power end of the linear power dioxde and the second work(
Rate end is connected；Voltage between wherein one end and the first end of linear power dioxde of the input voltage is as output electricity
Pressure；
The drive control circuit is integrated in chip；
Hot end of the hot end of the input voltage as output voltage, the first power end conduct of linear power dioxde
The feeder ear of the cold end of output voltage, the drive control circuit is connected through the hot end of resistance and input voltage, is driven
The first end of dynamic control circuit is also connected through the first power end of resistance and linear power dioxde, the second end of drive control circuit with
Second power end of linear power dioxde connects and connects the cold end of input voltage；
Detection flows into the electric current of the feeder ear, and setting flows into the electric current of drive control circuit first end than flowing into the feeder ear
Small first current difference of electric current, detect drive control circuit first end voltage, by drive control circuit adjust its drive end
Voltage, with the driving voltage of linear adjustment power tube so that the voltage of drive control circuit first end reaches predeterminated voltage, institute
The predeterminated voltage stated is equal to the reference voltage of drive control circuit.
6. linear voltage-stabilizing circuit according to claim 5, it is characterised in that：Detection flows into the electric current of the feeder ear, if
The voltage for setting drive control circuit first end is predeterminated voltage, and the predeterminated voltage is equal to the reference electricity of drive control circuit
Pressure, detection flow into the electric current of drive control circuit first end, its voltage for driving end are adjusted by drive control circuit, to adjust
The driving voltage of linear power dioxde so that the electric current for flowing into drive control circuit first end is smaller than the electric current for flowing into the feeder ear
First current difference.
7. linear voltage-stabilizing circuit according to claim 5, it is characterised in that：The drive control circuit includes that operation is put
Big device, the driving end of the output end of the operational amplifier as the drive control circuit, the voltage of the feeder ear by
First voltage source is clamped to supply voltage；Flow control current source is set, and the first end of the flow control current source is controlled with driving respectively
The first end of circuit processed is connected with the first end of operational amplifier, the low potential of the second termination input voltage of flow control current source
End, the size of the flow control current source is by flowing through the current control of feeder ear, and size of current is equal to and flows through the feeder ear
The electric current current difference that subtracts the first；The second end of the operational amplifier accesses the reference voltage.
8. according to the linear voltage-stabilizing circuit described in claim 5,6 or 7, it is characterised in that：The linear power dioxde is N-type
Metal-oxide-semiconductor, first power end are the drain electrode of N-type metal-oxide-semiconductor, and second power end is the source electrode of N-type metal-oxide-semiconductor, described
Control terminal is the gate pole of N-type metal-oxide-semiconductor.
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| CN111323634B (en) * | 2018-12-15 | 2022-04-05 | 深圳市角度控光智能照明技术有限公司 | Wide-range current sampling circuit |
| CN110764563B (en) * | 2019-10-29 | 2024-04-19 | 杰华特微电子股份有限公司 | Voltage regulating circuit and method |
| CN112051885A (en) * | 2020-09-08 | 2020-12-08 | 杰华特微电子（杭州）有限公司 | Voltage regulating circuit and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201319560Y (en) * | 2008-12-05 | 2009-09-30 | 上海贝岭股份有限公司 | Voltage-reducing circuit used for high-voltage power supply |
| CN104808734A (en) * | 2015-02-17 | 2015-07-29 | 唯捷创芯(天津)电子技术有限公司 | Adaptive low-voltage difference linear voltage stabilizer with wide withstand voltage range and chip thereof |
| CN205809758U (en) * | 2016-06-21 | 2016-12-14 | 杰华特微电子（杭州）有限公司 | Linear voltage-stabilizing circuit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US7893670B2 (en) * | 2009-02-20 | 2011-02-22 | Standard Microsystems Corporation | Frequency compensation scheme for stabilizing the LDO using external NPN in HV domain |
| JP5971720B2 (en) * | 2012-11-01 | 2016-08-17 | 株式会社東芝 | Voltage regulator |
-
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- 2016-06-21 CN CN201610460171.1A patent/CN106094959B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201319560Y (en) * | 2008-12-05 | 2009-09-30 | 上海贝岭股份有限公司 | Voltage-reducing circuit used for high-voltage power supply |
| CN104808734A (en) * | 2015-02-17 | 2015-07-29 | 唯捷创芯(天津)电子技术有限公司 | Adaptive low-voltage difference linear voltage stabilizer with wide withstand voltage range and chip thereof |
| CN205809758U (en) * | 2016-06-21 | 2016-12-14 | 杰华特微电子（杭州）有限公司 | Linear voltage-stabilizing circuit |
Non-Patent Citations (1)
| Title |
|---|
| 高压后置线性稳压电路;李建兵 等;《2008年中国电工技术学会电力电子学会第十一届学术年会论文集》;20090417;第2页左栏及附图3 * |
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Address after: Room 901-23, 9 / F, west 4 building, Xigang development center, 298 Zhenhua Road, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province, 310030 Patentee after: Jiehuate Microelectronics Co.,Ltd. Patentee after: HANGZHOU DEMING ELECTRONIC Co.,Ltd. Address before: Room 424, building 1, 1500 Wenyi West Road, Cangqian street, Yuhang District, Hangzhou City, Zhejiang Province Patentee before: JOULWATT TECHNOLOGY (HANGZHOU) Co.,Ltd. Patentee before: HANGZHOU DEMING ELECTRONIC Co.,Ltd. |
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