CN206226263U - Voltage clamp circuit and DC DC converters - Google Patents
Voltage clamp circuit and DC DC converters Download PDFInfo
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- CN206226263U CN206226263U CN201621361066.4U CN201621361066U CN206226263U CN 206226263 U CN206226263 U CN 206226263U CN 201621361066 U CN201621361066 U CN 201621361066U CN 206226263 U CN206226263 U CN 206226263U
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Abstract
Disclose a kind of voltage clamp circuit, including image current unit, reference current source, voltage clamping unit, wherein, the image current unit includes the first to the 3rd port, wherein, first port is connected with first voltage, and second port is connected with reference current source, and the 3rd port is connected with voltage clamping unit；The image current unit produces image current signal according to first voltage and reference current source；Voltage clamping unit is according to the image current signal and first voltage output second voltage.The utility model also provides a kind of DC DC converters, makes feedback circuit normal work as the enable signal of feedback circuit using open-loop voltage clamp circuit output clamp voltage, and then adjust the output voltage of DC DC converters.Because the voltage clamp circuit need not reduce power consumption using the larger amplifier of gain while reducing chip area.
Description
Technical field
The utility model belongs to technical field of integrated circuits, more particularly, to a kind of voltage clamp circuit and DC-DC
Converter.
Background technology
DC-DC (DC-to-dc) converter is that fixed voltage direct current is converted to the galvanic change of variable voltage by one kind
Volt circuit, it is now widely used for long-range and data communication, computer, business automation equipment, industrial instruments, army
The fields such as thing, space flight.
In existing DC-DC converter, including boosting (Boost) circuit and step-down (Buck) circuit.Specifically, with
As a example by DC-DC Boost circuits, as shown in figure 1, the DC-DC converter include direct-flow input end in, DC output end out with
And booster circuit 100, PWM (Pulse Width Modulation, pulse width modulation) control circuit 200 and feedback circuit
300.Wherein, the booster circuit 100 includes that input capacitance Cin, inductance L, the first field-effect transistor Q1, the second field-effect are brilliant
Body pipe Q2, wherein, the input capacitance Cin is connected between direct-flow input end in and earth terminal GND, the inductance L and described
First field-effect transistor Q1 is connected between direct-flow input end in and DC output end out；Second field-effect transistor
Q2 is connected between the node a between the inductance L and the first field-effect transistor Q1 and earth terminal GND.Wherein, it is described
The grid of the first field-effect transistor Q1 is connected with pwm control circuit 200, and source electrode is connected with DC output end out, drains and section
Point a is connected；The grid of the second field-effect transistor Q2 is connected with pwm control circuit 200, and source electrode is connected with earth terminal GND,
Drain electrode is connected with node a.The feedback circuit 300 is connected with DC output end out, produces feedback voltage V FB, and send to institute
State pwm control circuit 200.Feedback voltage V FB and reference voltage of the pwm control circuit 200 according to feedback circuit 300
Vref produces pwm signal, the pwm signal to control the work shape of the first field-effect transistor Q1 and the second field-effect transistor Q2
State, and then adjust the output voltage Vout of DC output end out.
As shown in Fig. 2 the feedback circuit 300 includes multiple resistance R1~R8, be connected in series in DC output end out and
Between earth terminal GND, also including multiple switch S1~S6, partial ohmic R2~R7 two ends are connected in parallel respectively.The feedback
Circuit 300 also includes switch control unit 301, for the shut-off of controlling switch S1~S6, wherein, the switch control unit
301 include Enable Pin En and power end Vdd, wherein, the voltage VEN of the Enable Pin EN need to meet some requirements can just make instead
The switch control unit 301 of current feed circuit 300 works, for example VEN ＞ V0。
Therefore, the DC-DC Boost circuits also include voltage clamp circuit 400, as shown in figure 3, being connected to described straight
Between stream output end out and feedback circuit 300, voltage is enabled for being produced according to the output voltage Vout of DC output end out
VEN is supplied to the switch control unit 301 of the feedback circuit 300.
Existing voltage clamp circuit 400 is closed loop voltage clamp circuit, by the resistance for setting resistance Rtrim and resistance R1
Value enables voltage VEN than output, wherein, VEN=Vref/R1*Rtrim.It is accurate in order to realize because the circuit is closed loop circuit
Closed loop gain, it is necessary to the larger amplifier OP of gain.Compensation resistance Rcomp and electric capacity the Ccomp change of other closed loop circuit
Scope is big, increased the design difficulty of circuit.
Utility model content
The purpose of this utility model is to provide a kind of voltage clamp circuit and DC-DC converter.
According to one side of the present utility model, there is provided a kind of voltage clamp circuit, including image current unit, reference current
Source, voltage clamping unit, wherein, the image current unit includes the first to the 3rd port, wherein, first port is electric with first
Pressure connection, second port is connected with reference current source, and the 3rd port is connected with voltage clamping unit；The image current unit root
Image current signal is produced according to first voltage and reference current source；Voltage clamping unit according to the image current signal and
First voltage exports second voltage.
Preferably, the image current unit includes the first transistor and transistor seconds, wherein, the of the first transistor
The first of one pole and transistor seconds is extremely connected by first port with first voltage；The control pole of the first transistor and second
The control pole of transistor is connected by second port with the reference current source；Second pole of the first transistor passes through the second end
Mouth is connected with the reference current source；Second pole of transistor seconds is connected by the 3rd port with the voltage clamping unit.
Preferably, the first transistor and the transistor seconds are triode or field-effect transistor.
Preferably, the voltage clamping unit includes resistance, electric capacity, load resistance, load capacitance and third transistor,
Wherein, the resistance and the electric capacity are connected in parallel between the 3rd port of the image current unit and earth terminal；It is described
The control pole of third transistor is connected with the 3rd port of the image current unit, and the first pole is connected with second voltage, and second
Pole is connected with first voltage；The load resistance and the load capacitance are connected in parallel between second voltage and earth terminal.
Preferably, the described first extremely emitter stage or source electrode, the second extremely colelctor electrode or drain electrode.
According to another aspect of the present utility model, there is provided a kind of DC-DC converter, including DC-DC conversion circuit, PWM control
Circuit processed, feedback circuit and voltage clamp circuit, the DC-DC conversion circuit be connected to signal input part and signal output part it
Between；The voltage clamp circuit is connected with the feedback circuit, for generating clamp voltage according to output voltage；The feedback electricity
Road is connected with the pwm control circuit, for according to the clamp voltage and output voltage generation feedback voltage；The PWM
Control circuit is connected with the DC-DC conversion circuit, for according to the feedback voltage and reference voltage generation PWM control letters
Number and send to the DC-DC conversion circuit；The DC-DC conversion circuit turns input voltage according to the pwm control signal
Change output voltage into.
Preferably, the feedback circuit includes：N number of resistance, is connected in series between output voltage and earth terminal, wherein, N
It is the positive integer more than 2；Multiple switch, it is in parallel with the partial ohmic in N number of resistance respectively；Switch control unit, for basis
The closure or shut-off of the clamp voltage and output voltage control multiple switch.
Preferably, the voltage clamp circuit includes image current unit, reference current source and voltage clamping unit, its
In, the image current unit include the first to the 3rd port, wherein, first port is connected with first voltage, second port and
Reference current source is connected, and the 3rd port is connected with voltage clamping unit；The image current unit is according to first voltage and ginseng
Examine current source and produce image current signal；Voltage clamping unit is according to the image current signal and first voltage output second
Voltage.
Preferably, the image current unit includes the first transistor and transistor seconds, wherein, the of the first transistor
The first of one pole and transistor seconds is extremely connected by first port with first voltage；The control pole of the first transistor and second
The control pole of transistor is connected by second port with the reference current source；Second pole of the first transistor passes through the second end
Mouth is connected with the reference current source；Second pole of transistor seconds is connected by the 3rd port with the voltage clamping unit.
Preferably, the first transistor and the transistor seconds are triode or field-effect transistor.
Preferably, the voltage clamping unit includes resistance, electric capacity, load resistance, load capacitance and third transistor,
Wherein, the resistance and the electric capacity are connected in parallel between the 3rd port of the image current unit and earth terminal；It is described
The control pole of third transistor is connected with the 3rd port of the image current unit, and the first pole is connected with second voltage, and second
Pole is connected with first voltage；The load resistance and the load capacitance are connected in parallel between second voltage and earth terminal.
Preferably, the described first extremely emitter stage or source electrode, the second extremely colelctor electrode or drain electrode.
Voltage clamp circuit and DC-DC converter that the utility model is provided, are exported using open-loop voltage clamp circuit and clamped
Position voltage makes feedback circuit normal work as the enable signal of feedback circuit, and then adjusts the output voltage of DC-DC converter.
Because the voltage clamp circuit need not reduce power consumption using the larger amplifier of gain while reducing chip area.
Brief description of the drawings
By description referring to the drawings to the utility model embodiment, of the present utility model above-mentioned and other mesh
, feature and advantage will be apparent from, in the accompanying drawings：
Fig. 1 shows the schematic diagram of the DC-DC converter according to prior art；
Fig. 2 shows the circuit theory diagrams of the feedback circuit according to prior art；
Fig. 3 shows the circuit theory diagrams of the voltage clamp circuit according to prior art；
Fig. 4 shows the circuit theory diagrams of the voltage clamp circuit provided according to the utility model embodiment；
Fig. 5 shows the circuit theory diagrams of the DC-DC converter according to the utility model embodiment.
Specific embodiment
Various embodiments of the present utility model are more fully described hereinafter with reference to accompanying drawing.In various figures, identical
Element is represented using same or similar reference.For the sake of clarity, the various pieces in accompanying drawing are not drawn to paint
System.
The utility model can be presented in a variety of manners, some of them example explained below.
Fig. 4 shows the schematic diagram of the voltage clamp circuit provided according to the utility model embodiment.Such as Fig. 4 institutes
Show, the voltage clamp circuit 400 includes image current unit 410, reference current source Iref, voltage clamping unit 420.
Wherein, the image current unit 410 includes the first to the 3rd port (P1-P3), the electricity of first port P1 and first
Pressure V1 connections, second port P2 is connected with reference current source Iref, and the 3rd port P3 is connected with voltage clamping unit 420；It is described
Image current unit 410 produces image current signal according to first voltage V1 and reference current source Iref.
In the present embodiment, the image current unit 410 includes the first transistor H1 and transistor seconds H2.Wherein,
First pole of the first transistor H1 and the first of transistor seconds H2 is extremely connected by first port P1 with first voltage V1；The
The control pole of one transistor H1 and the control pole of transistor seconds H2 pass through the second port P2 and reference current source Iref
Connection；Second pole of the first transistor H1 is connected by second port P2 with the reference current source Iref；Transistor seconds H2
The second pole be connected with the voltage clamping unit 420 by the 3rd port P3.
Wherein, the first transistor H1 and transistor seconds H2 is the triode or field-effect transistor of p-type, the
The source electrode of the one extremely emitter stage of triode or field-effect transistor, the second extremely colelctor electrode of triode or field-effect is brilliant
The drain electrode of body pipe, the grid of the control extremely base stage of triode or field-effect transistor.
The image current unit 410 is supplied to the control of transistor according to first voltage V1 and reference current source Iref
The voltage of pole opens the first transistor H1 and transistor seconds H2, and then the reference current of reference current source is mirrored into the 3rd end
Mouthful P3, image current signal is exported from the 3rd port P3, wherein, the electric current of the image current signal and the electricity of reference current source
Stream is the same.
Voltage clamping unit 420 is according to the image current signal and first voltage V1 output second voltages V2.
In the present embodiment, the voltage clamping unit 420 includes resistance R, electric capacity C, load resistance Rload, load electricity
Hold Cload and third transistor H3.Wherein, the resistance R and the electric capacity C are connected in the image current unit in parallel
Between 410 the 3rd port P3 and earth terminal GND.The control pole of the third transistor H3 and the image current unit 410
The 3rd port P3 connections, the first pole is connected with second voltage V2, and the second pole is connected with first voltage V1.The load resistance
Rload and the load capacitance Cload are connected in parallel between second voltage V2 and earth terminal GND.
Wherein, the third transistor H3 is the triode or field-effect transistor of N-type, the transmitting of the first extremely triode
Pole or the source electrode of field-effect transistor, the drain electrode of the second extremely colelctor electrode or field-effect transistor of triode, control pole
It is the base stage or the grid of field-effect transistor of triode.
In the present embodiment, the voltage at the control pole of third transistor H3 is VG=Iref* R, the voltage at the first pole is
VS=Iref*R-VGS, i.e. the output voltage of voltage clamping unit is V2=VS=Iref*R-VGS。
The voltage clamp circuit that the utility model is provided, using the circuit stability voltage of open loop form.The circuit need not
Using the big amplifier of gain, power consumption is reduced while reducing chip area.
Fig. 5 shows the circuit theory diagrams of the DC-DC converter provided according to the utility model embodiment.As shown in figure 5,
The DC-DC converter includes DC-DC conversion circuit 100, pwm control circuit 200, feedback circuit 300 and voltage clamp circuit
400。
Wherein, the DC-DC conversion circuit 100 is connected between signal input part in and signal output part out.
In the present embodiment, DC-DC conversion circuit 100 can also be able to be reduction voltage circuit for booster circuit.The specific reality
Apply and be described by taking booster circuit as an example in example.
The DC-DC conversion circuit 100 include input capacitance Cin, inductance L, the first transistor Q1, transistor seconds Q2 with
And output capacitance Cout.
Wherein, the inductance L and the first transistor Q1 be connected in series in signal input part in and signal output part out it
Between；The input capacitance Cin is connected between signal input part in and earth terminal GND；The second field-effect transistor Q2 connects
Between the node a and earth terminal GND that are connected between the inductance L and the first field-effect transistor Q1.Wherein, described first
The grid of field-effect transistor Q1 is connected with pwm control circuit 200, and source electrode is connected with DC output end out, drains and node a
Connection；The grid of the second field-effect transistor Q2 is connected with pwm control circuit 200, and source electrode is connected with earth terminal GND, leakage
Pole is connected with node a.
The voltage clamp circuit 400 is connected with the feedback circuit 300, for generating clamper electricity according to output voltage
Pressure.
In the present embodiment, the voltage clamp circuit 400 includes image current unit 410, reference current source Iref, electricity
Pressing tongs bit location 420.
Wherein, the image current unit 410 includes the first to the 3rd port (P1-P3), the electricity of first port P1 and first
Pressure V1 connections, second port P2 is connected with reference current source Iref, and the 3rd port P3 is connected with voltage clamping unit 420；It is described
Image current unit 410 produces image current signal according to first voltage V1 and reference current source Iref.Wherein, first voltage
V1 is connected with the voltage of signal output part out.
In the present embodiment, the image current unit 410 includes the first transistor H1 and transistor seconds H2.Wherein,
First pole of the first transistor H1 and the first of transistor seconds H2 is extremely connected by first port P1 with first voltage V1；The
The control pole of one transistor H1 and the control pole of transistor seconds H2 pass through the second port P2 and reference current source Iref
Connection；Second pole of the first transistor H1 is connected by second port P2 with the reference current source Iref；Transistor seconds H2
The second pole be connected with the voltage clamping unit 420 by the 3rd port P3.
Wherein, the first transistor H1 and transistor seconds H2 is the triode or field-effect transistor of p-type, the
The source electrode of the one extremely emitter stage of triode or field-effect transistor, the second extremely colelctor electrode of triode or field-effect is brilliant
The drain electrode of body pipe, the grid of the control extremely base stage of triode or field-effect transistor.
The image current unit 410 is supplied to the control of transistor according to first voltage V1 and reference current source Iref
The voltage of pole opens the first transistor H1 and transistor seconds H2, and then the reference current of reference current source is mirrored into the 3rd end
Mouthful P3, image current signal is exported from the 3rd port P3, wherein, the electric current of the image current signal and the electricity of reference current source
Stream is the same.
Voltage clamping unit 420 is according to the image current signal and first voltage V1 output second voltages V2.
In the present embodiment, the voltage clamping unit 420 includes resistance R, electric capacity C, load resistance Rload, load electricity
Hold Cload and third transistor H3.Wherein, the resistance R and the electric capacity C are connected in the image current unit in parallel
Between 410 the 3rd port P3 and earth terminal GND.The control pole of the third transistor H3 and the image current unit 410
The 3rd port P3 connections, the first pole is connected with second voltage V2, and the second pole is connected with first voltage V1.The load resistance
Rload and the load capacitance Cload are connected in parallel between second voltage V2 and earth terminal GND.
Wherein, the third transistor H3 is the triode or field-effect transistor of N-type, the transmitting of the first extremely triode
Pole or the source electrode of field-effect transistor, the drain electrode of the second extremely colelctor electrode or field-effect transistor of triode, control pole
It is the base stage or the grid of field-effect transistor of triode.
In the present embodiment, the voltage at the control pole of third transistor H3 is VG=Iref* R, the voltage at the first pole is
VS=Iref*R-VGS, i.e. the output voltage of voltage clamping unit is V2=VS=Iref*R-VGS。
The feedback circuit 300 is connected with the pwm control circuit 200, for according to the clamp voltage and output
Voltage generates feedback voltage.
In the present embodiment, the feedback circuit 300 of stating includes N number of resistance, multiple switch and switch control unit.Its
In, N number of resistant series are connected between output voltage and earth terminal, wherein, N is the positive integer more than 2；Multiple switch respectively with
Partial ohmic in N number of resistance is in parallel；Switch control unit 301 is used for many according to the clamp voltage and output voltage control
The closure of individual switch or shut-off.The switch control unit 301 includes Enable Pin En and power end Vdd, wherein, the Enable Pin
The voltage VEN of EN is connected with the output end of the voltage clamp circuit 400.Wherein, VEN=V2=Iref*R-VGS。
Specifically, as shown in Fig. 2 the feedback circuit 300 includes multiple resistance R1~R8, it is connected in series in direct current output
Between the out and earth terminal GND of end, also including multiple switch S1~S6, partial ohmic R2~R7 two ends are connected in parallel respectively.Institute
Stating feedback circuit 300 also includes switch control unit 301, for the shut-off of controlling switch S1~S6, wherein, the switch control
Unit 301 includes Enable Pin En and power end Vdd, wherein, voltage VEN and the voltage clamp circuit of the Enable Pin EN
400 output end connection, the clamp voltage makes the feedback circuit normal work as the voltage of Enable Pin EN.
The pwm control circuit 200 is connected with the DC-DC conversion circuit 100, for according to the feedback voltage and
Reference voltage generates pwm control signal and sends to the DC-DC conversion circuit 100.
In the present embodiment, the pwm control circuit 200 is according to the feedback voltage V FB of feedback circuit 300 and with reference to electricity
Pressure Vref produces pwm signal, the pwm signal to control the work of the first field-effect transistor Q1 and the second field-effect transistor Q2
State, and then adjust the output voltage Vout of DC output end out.
Input voltage is converted into output voltage by the DC-DC conversion circuit 100 according to the pwm control signal.
The DC-DC converter that the utility model is provided, the voltage clamp circuit output clamp voltage using open loop form is made
For the enable signal of feedback circuit makes feedback circuit normal work, and then adjust the output voltage of DC-DC converter.Due to the electricity
Pressure clamp circuit need not reduce power consumption using the big amplifier of gain while reducing chip area.
According to embodiment of the present utility model as described above, these embodiments do not have all of details of detailed descriptionthe,
Also it is only described specific embodiment not limit the utility model.Obviously, as described above, many modifications and change can be made
Change.This specification is chosen and specifically describes these embodiments, is to preferably explain that principle of the present utility model and reality should
With so that skilled artisan can repairing using the utility model and on the basis of the utility model well
Change and use.The scope that protection domain of the present utility model should be defined by the utility model claim is defined.
Claims (12)
1. a kind of voltage clamp circuit, including image current unit, reference current source, voltage clamping unit,
Wherein, the image current unit includes the first to the 3rd port, wherein, first port is connected with first voltage, and second
Port is connected with reference current source, and the 3rd port is connected with voltage clamping unit；
The image current unit produces image current signal according to first voltage and reference current source；
Voltage clamping unit is according to the image current signal and first voltage output second voltage.
2. voltage clamp circuit according to claim 1, wherein, the image current unit includes the first transistor and the
Two-transistor,
Wherein, the first of the first pole of the first transistor and transistor seconds is extremely connected by first port with first voltage；
The control pole of the first transistor and the control pole of transistor seconds are connected by second port with the reference current source；
Second pole of the first transistor is connected by second port with the reference current source；
Second pole of transistor seconds is connected by the 3rd port with the voltage clamping unit.
3. voltage clamp circuit according to claim 2, wherein, the first transistor and the transistor seconds are three
Pole pipe or field-effect transistor.
4. voltage clamp circuit according to claim 3, wherein, the voltage clamping unit includes resistance, electric capacity, load
Resistance, load capacitance and third transistor,
Wherein, the resistance and the electric capacity are connected in parallel between the 3rd port of the image current unit and earth terminal；
The control pole of the third transistor is connected with the 3rd port of the image current unit, and the first pole connects with second voltage
Connect, the second pole is connected with first voltage；
The load resistance and the load capacitance are connected in parallel between second voltage and earth terminal.
5. voltage clamp circuit according to claim 4, wherein, the described first extremely emitter stage or source electrode, second extremely
Colelctor electrode or drain electrode.
6. a kind of DC-DC converter, including DC-DC conversion circuit, pwm control circuit, feedback circuit and voltage clamp circuit,
The DC-DC conversion circuit is connected between signal input part and signal output part；
The voltage clamp circuit is connected with the feedback circuit, for generating clamp voltage according to output voltage；
The feedback circuit is connected with the pwm control circuit, for anti-according to the clamp voltage and output voltage generation
Feedthrough voltage；
The pwm control circuit is connected with the DC-DC conversion circuit, for being given birth to according to the feedback voltage and reference voltage
Into pwm control signal and send to the DC-DC conversion circuit；
Input voltage is converted into output voltage by the DC-DC conversion circuit according to the pwm control signal.
7. DC-DC converter according to claim 6, wherein, the feedback circuit includes：
N number of resistance, is connected in series between output voltage and earth terminal, wherein, N is the positive integer more than 2；
Multiple switch, it is in parallel with the partial ohmic in N number of resistance respectively；
Switch control unit, for closure or shut-off according to the clamp voltage and output voltage control multiple switch.
8. DC-DC converter according to claim 6, wherein, the voltage clamp circuit includes image current unit, ginseng
Current source and voltage clamping unit are examined,
Wherein, the image current unit includes the first to the 3rd port, wherein, first port is connected with first voltage, and second
Port is connected with reference current source, and the 3rd port is connected with voltage clamping unit；
The image current unit produces image current signal according to first voltage and reference current source；
Voltage clamping unit is according to the image current signal and first voltage output second voltage.
9. DC-DC converter according to claim 8, wherein, the image current unit includes the first transistor and the
Two-transistor,
Wherein, the first of the first pole of the first transistor and transistor seconds is extremely connected by first port with first voltage；
The control pole of the first transistor and the control pole of transistor seconds are connected by second port with the reference current source；
Second pole of the first transistor is connected by second port with the reference current source；
Second pole of transistor seconds is connected by the 3rd port with the voltage clamping unit.
10. DC-DC converter according to claim 9, wherein, the first transistor and the transistor seconds are three
Pole pipe or field-effect transistor.
11. DC-DC converters according to claim 10, wherein, the voltage clamping unit includes resistance, electric capacity, bears
Resistance, load capacitance and third transistor are carried,
Wherein, the resistance and the electric capacity are connected in parallel between the 3rd port of the image current unit and earth terminal；
The control pole of the third transistor is connected with the 3rd port of the image current unit, and the first pole connects with second voltage
Connect, the second pole is connected with first voltage；
The load resistance and the load capacitance are connected in parallel between second voltage and earth terminal.
12. DC-DC converters according to claim 11, wherein, the described first extremely emitter stage or source electrode, second extremely
Colelctor electrode or drain electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621361066.4U CN206226263U (en) | 2016-12-12 | 2016-12-12 | Voltage clamp circuit and DC DC converters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621361066.4U CN206226263U (en) | 2016-12-12 | 2016-12-12 | Voltage clamp circuit and DC DC converters |
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| Publication Number | Publication Date |
|---|---|
| CN206226263U true CN206226263U (en) | 2017-06-06 |
Family
ID=58783367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621361066.4U Active CN206226263U (en) | 2016-12-12 | 2016-12-12 | Voltage clamp circuit and DC DC converters |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505835A (en) * | 2016-12-12 | 2017-03-15 | 北京集创北方科技股份有限公司 | Voltage clamp circuit and DC DC changers |
| CN109639119A (en) * | 2018-08-29 | 2019-04-16 | 厦门元顺微电子技术有限公司 | Driving circuit applied to DC-DC converter |
-
2016
- 2016-12-12 CN CN201621361066.4U patent/CN206226263U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505835A (en) * | 2016-12-12 | 2017-03-15 | 北京集创北方科技股份有限公司 | Voltage clamp circuit and DC DC changers |
| CN106505835B (en) * | 2016-12-12 | 2019-08-27 | 北京集创北方科技股份有限公司 | Voltage clamp circuit and DC-DC converter |
| CN109639119A (en) * | 2018-08-29 | 2019-04-16 | 厦门元顺微电子技术有限公司 | Driving circuit applied to DC-DC converter |
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