CN109254188A - A kind of high-speed current detection circuit suitable for Switching Power Supply - Google Patents
A kind of high-speed current detection circuit suitable for Switching Power Supply Download PDFInfo
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- CN109254188A CN109254188A CN201811170641.6A CN201811170641A CN109254188A CN 109254188 A CN109254188 A CN 109254188A CN 201811170641 A CN201811170641 A CN 201811170641A CN 109254188 A CN109254188 A CN 109254188A
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- 239000002775 capsule Substances 0.000 claims description 30
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- 239000003990 capacitor Substances 0.000 abstract 1
- 230000035484 reaction time Effects 0.000 description 4
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- 230000036632 reaction speed Effects 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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Abstract
本发明涉及一种适用于开关电源电流快速检测电路，其由电流源管MN1和MN2、电流镜MP1和MP2、检测电流输出MOS管MP3、检测管Ms、HS PowerMOS功率管、LS PowerMOS功率管、检测电阻Rsi、输出电阻Rso、检测电阻K*Rsi、电阻RM和补偿电容Cg连接组成。本发明结构设计简单、合理，反应速度更快，减小了电流模开关电源的周期最小导通时间、最小占空比、最低输出电压、改善了负载跳变特性等，以及在其他模式的开关电源芯片电路中，加快了电流保护机制的反应时间。
The invention relates to a fast detection circuit for switching power supply current, which consists of current source tubes MN1 and MN2, current mirrors MP1 and MP2, detection current output MOS tube MP3, detection tube Ms, HS PowerMOS power tube, LS PowerMOS power tube, The detection resistance Rsi, the output resistance Rso, the detection resistance K*Rsi, the resistance RM and the compensation capacitor Cg are connected to form. The invention has simple and reasonable structure design, faster response speed, reduces the cycle minimum on-time, minimum duty cycle, and minimum output voltage of the current mode switching power supply, improves load jump characteristics, etc. In the power chip circuit, the response time of the current protection mechanism is accelerated.
Description
Technical field
The invention belongs to field of analog integrated circuit, and in particular to one kind is suitable for switch power supply current and quickly detects electricity
Road.
Background technique
Switching power circuit is widely used in various electronic products due to its high-efficient feature, in handheld device.And it opens
On the one hand powered-down source power pipe output current detection circuit is the necessary circuits of current-mode switching power source chip, operating rate and
Performance directly affects period minimum turn-on time, minimum duty cycle, the minimum output voltage, load jump of current-mode Switching Power Supply
Become characteristic etc.；Another convenience is in the switching power source chip circuit of other modes, it is also desirable to which current detection circuit is as chip
Protection mechanism avoids chip from damaging because electric current is excessive.
Due to traditional switch power supply current detection node voltage as switching frequency height jumps, current detection circuit is every
It requires to re-establish dc point when a cycle detection electric current, causes detection to slow, influence entire Switching Power Supply
Minimum turn-on time and minimum output voltage.
It is illustrated in figure 3 typical adjusting and voltage-reduction switch power tube current detection circuit, includes HSPowerMOS power
Pipe and LS PowerMOS power tube, they are under the control of control signal HSG, LSG, alternate conduction within a clock cycle.
Current detecting trans-impedance amplifier includes current source MN1, MN2, and VB is bias voltage, current mirror MP1 and MP2 ruler having the same
It is very little, detect electric current output mos pipe MP3, compensating electric capacity Cg, two identical detection resistance Rsi and output resistance Rso.Work as HS
When PowerMOS power tube is connected, ideally current detection circuit output voltage are as follows:
RdsonH is the conducting resistance of HS PowerMOS power tube in formula, and IL is to flow through in HS PowerMOS power tube
Electric current, Vs is current detecting output voltage, with power tube current IL at fixed proportion relationship.
It is the shortcomings that circuit shown in Fig. 3, in each switch periods, as the conducting of LS PowerMOS power tube, HSPowerMOS
When power tube turns off, switching node SW is low level, and current mirror MP2 will be in an off state in current detection circuit, current mirror
MP3 is fully on, output voltage Vs=VDD*Rsi/Rso.When LS PowerMOS is turned off, and HS PowerMOS is connected, SW electricity
Pressure jump is VDD-IL*RdsonH, and current detection circuit needs to re-establish operating point, as current mirror MP2, detects electric current output
After metal-oxide-semiconductor MP3 is worked normally, the output voltage Vs of circuit is just shown in above formula and IL is at fixed proportion relationship；In HS
PowerMOS was conducting in this period that current detection circuit operating point is normally established, and output voltage Vs cannot function as normally
Voltage is utilized by switching power source chip control circuit；This will affect the period minimum turn-on time, most of current-mode Switching Power Supply
Small duty ratio, minimum output voltage, load jump characteristic etc. and in the switching power source chip circuit of other modes, influence electricity
Flow the reaction time of protection mechanism.
Summary of the invention
In order to solve the problems, such as background above technology, it is fast suitable for switch power supply current that the invention proposes one kind
Fast detection circuit, structure design is simple, reasonable, and reaction speed faster, lead by the period minimum for reducing current-mode Switching Power Supply
The logical time, minimum output voltage, improves load jump characteristic etc. at minimum duty cycle, and in the Switching Power Supply of other modes
In chip circuit, the reaction time of current protection mechanism is accelerated.
Technical scheme is as follows:
It is above-mentioned to be suitable for switch power supply current quick detection circuit, by electric current source capsule MN1 and MN2, current mirror MP1 and
MP2, detection electric current output mos pipe MP3, detection pipe Ms, HS PowerMOS power tube, LSPowerMOS power tube, detection resistance
Rsi, output resistance Rso, detection resistance K*Rsi, resistance RM connect composition with compensating electric capacity Cg；
The source electrode of the LS PowerMOS power tube is grounded, and drain connection switch power supply chip output port SW, and grid connects
Meet switching power source control circuit output port LSG；The source electrode connection switch power supply chip of the HS PowerMOS power tube exports
Port SW, drain connection switch power supply chip input power port VDD, grid connection switch power control circuit output port
HSG；The source electrode connection switch power supply chip output port SW of the detection pipe Ms, drain electrode connect the resistance RM and by described
Resistance RMConnection switch power supply chip input power port VDD, grid connection switch power control circuit output port HSG；Institute
The drain electrode for stating current mirror MP1 connects the drain electrode of the electric current source capsule MN1, and the source electrode of the current mirror MP1 connects the detection electricity
Resistance Rsi simultaneously passes through the detection resistance Rsi connection switch power supply chip input power port VDD, the grid of the current mirror MP1
Connect the drain electrode of the electric current source capsule MN1；The source electrode of the electric current source capsule MN1 is grounded, and grid connects biased electrical pressure side VB；It is described
The drain electrode of current mirror MP2 connects the drain electrode of the electric current source capsule MN2, and the source electrode of the current mirror MP2 connects the detection resistance
K*Rsi and drain electrode and the resistance R that the detection pipe Ms is connected to by the detection resistance K*RsiMTie point；The electric current
The source electrode of source capsule MN2 is grounded；The drain electrode of the detection electric current output mos pipe MP3 connects the output resistance Rso and by described
Output resistance Rso ground connection, extracted current inspection between the drain electrode and the output resistance Rso of the detection electric current output mos pipe MP3
Slowdown monitoring circuit output voltage terminal Vs, the grid of the detection electric current output mos pipe MP3 and the source electrode of the current mirror MP2 and described
The drain electrode of electric current source capsule MN2 is connected, and the source electrode of the detection electric current output mos pipe MP3 is connected to the drain electrode of the current mirror MP1
With the tie point of detection resistance Rsi；The one end the compensating electric capacity Cg connects power vd D, and it is defeated that the other end connects the detection electric current
The grid of metal-oxide-semiconductor MP3 out.
It is described to be suitable for switch power supply current quick detection circuit, wherein the current detection circuit is defeated when working normally
The relational expression of voltage Vs and power tube current IL out are as follows:
RdsonMs is the conducting resistance of detection pipe Ms in above formula, and IB is the biased electrical flowed through in electric current source capsule MN1 and MN2
Stream；(k+1) IB*Rso is the output voltage that the mismatch being intentionally introduced into generates, (RdsonH/Rsi) * (RdsonMs/ in above formula
(RdsonMs+RM)) with power tube current IL at fixed proportion.
The utility model has the advantages that
The present invention is suitable for the design of switch power supply current quick detection circuit structure simply, rationally, by traditional typical
On the basis of current detection circuit, a detection pipe Ms and resistance RM and the mismatch for being intentionally introduced into detection resistance are introduced, so that
Current detecting speed greatly improves, and reduces the period minimum turn-on time of current-mode Switching Power Supply, minimum duty cycle, minimum defeated
Out voltage, improve load jump characteristic etc., and in the switching power source chip circuit of other modes, accelerate current protection
The reaction time of mechanism.
Specific advantage is embodied in the following:
(1) position for changing conventional current test point passes through one and the detection of HS PowerMOS power tube equal proportion
A pipe Ms and resistance RM, realize that test point voltage each period only has minor change；
(2) by (being exported by electric current source capsule MN1 and MN2, current mirror MP1 and MP2, detection electric current to detection amplifier
Metal-oxide-semiconductor MP3, detection resistance Rsi, output resistance Rso, detection resistance K*Rsi and compensating electric capacity Cg constitute current sense amplifier)
Fixed mismatch is added, so that each device of detection circuit is constantly in working condition；
(3) it avoids current detection circuit and periodically establishes dc point, to improve current detection circuit
Operating rate.
Detailed description of the invention
Fig. 1 is the circuit diagram that the present invention is suitable for switch power supply current quick detection circuit；
Fig. 2 is the circuit diagram for the embodiment 1 that the present invention is suitable for switch power supply current quick detection circuit；
Fig. 3 is the circuit diagram of typical adjusting and voltage-reduction switch power tube current detection circuit.
Specific embodiment
As shown in Figure 1, the present invention is suitable for switch power supply current quick detection circuit, by electric current source capsule MN1 and MN2, electricity
Flow mirror MP1 and MP2, detection electric current output mos pipe MP3, detection pipe Ms, HS PowerMOS power tube, LS PowerMOS power
Pipe, detection resistance Rsi, output resistance Rso, detection resistance K*Rsi, resistance RM connect composition with compensating electric capacity Cg.
The source electrode of the LS PowerMOS power tube is grounded, and drain connection switch power supply chip output port SW, grid connection
Switching power source control circuit output port LSG；The source electrode connection switch power supply chip output port of the HS PowerMOS power tube
SW, drain connection switch power supply chip input power port VDD, grid connection switch power control circuit output port HSG；It should
The source electrode connection switch power supply chip output port SW of detection pipe Ms, drain electrode connection resistance RM simultaneously pass through resistance RMConnection switch electricity
Source chip input power port VDD, grid connection switch power control circuit output port HSG；The drain electrode of current mirror MP1 connects
The drain electrode of electric current source capsule MN1 is connect, the source electrode connecting detection resistance Rsi of current mirror MP1 simultaneously passes through detection resistance Rsi connection switch
Power supply chip input power port VDD, the grid of current mirror MP1 connect the drain electrode of electric current source capsule MN1；The electric current source capsule
The source electrode of MN1 is grounded, and grid connects biased electrical pressure side VB；The drain electrode of the drain electrode connection electric current source capsule MN2 of current mirror MP2, should
The source electrode connecting detection resistance K*Rsi of current mirror MP2 and drain electrode and the resistance that detection pipe Ms is connected to by detection resistance K*Rsi
The tie point of RM；The source electrode of electric current source capsule MN2 is grounded；The drain electrode of detection electric current output mos pipe MP3 connects output resistance
Rso is simultaneously grounded by output resistance Rso, and electricity is drawn between the drain electrode and output resistance Rso of detection electric current output mos pipe MP3
The grid of current detection circuit output voltage terminal Vs, detection electric current output mos pipe MP3 and the source electrode and current source of current mirror MP2
The drain electrode of pipe MN2 is connected, and the source electrode of detection electric current output mos pipe MP3 is connected to the drain electrode and detection resistance of current mirror MP1
The tie point of Rsi；The one end compensating electric capacity Cg connects power vd D, the grid of other end connecting detection electric current output mos pipe MP3.
As shown in Figure 1, the present invention joined on the basis of traditional circuit it is proportional to HS PowerMOS power pipe size
Detection pipe Ms, the 1/N (N is the integer much larger than 1) having a size of HS PowerMOS power tube, and connect with detection pipe Ms
Resistance RM, and the detection resistance connecting with current mirror MP2 is become into K*Rsi (K is slightly over 1 positive number)；It is opened when each
Close LS PowerMOS power tube conducting in the period, when HSPowerMOS power tube turns off, two input terminals of current detection circuit
It is all power vd D, current mirror MP2 will not be in an off state, and because detection resistance has been intentionally introduced small mismatch,
At this moment detection electric current output mos pipe MP3 is still within linear work area, has Weak current to flow through；When LS PowerMOS power tube
Shutdown, when HS PowerMOS power tube is connected, current detection circuit of the invention does not need to re-establish operating point, greatly
The fast settling time of output voltage Vs, output voltage Vs and HS when current detection circuit of the invention works normally
The relationship of PowerMOS power tube current IL are as follows:
RdsonMs is the conducting resistance of detection pipe Ms in above formula, and IB is the biased electrical flowed through in electric current source capsule MN1 and MN2
Stream；(k+1) IB*Rso is the output voltage that the mismatch being intentionally introduced into generates, (RdsonH/Rsi) * (RdsonMs/ in above formula
(RdsonMs+RM)) with power tube current IL at fixed proportion.
Embodiment 1
As shown in Fig. 2, the present invention is suitable for switch power supply current quick detection circuit, by electric current source capsule MN1 and MN2, electricity
Flow mirror MP1 and MP2, detection electric current output mos pipe MP3, detection pipe Ms, HS PowerMOS power tube, LS PowerMOS power
Pipe, detection resistance Rsi1, output resistance Rso, detection resistance Rsi2, resistance RM connect composition with compensating electric capacity Cg.
The source electrode of the LS PowerMOS power tube is grounded, and drain connection switch power supply chip output port SW, grid connection
Switching power source control circuit output port LSG；The source electrode connection switch power supply chip output port of the HS PowerMOS power tube
SW, drain connection switch power supply chip input power port VDD, grid connection switch power control circuit output port HSG；It should
The source electrode connection switch power supply chip output port SW of detection pipe Ms, drain electrode connection resistance RM simultaneously pass through resistance RM connection switch electricity
Source chip input power port VDD, grid connection switch power control circuit output port HSG；The drain electrode of current mirror MP1 connects
The drain electrode of electric current source capsule MN1 is connect, the source electrode connecting detection resistance Rsi1 of current mirror MP1 is simultaneously opened by detection resistance Rsi1 connection
Powered-down source chip input power port VDD, the grid of current mirror MP1 connect the drain electrode of electric current source capsule MN1；The electric current source capsule
The source electrode of MN1 is grounded, and grid connects biased electrical pressure side VB；The drain electrode of the drain electrode connection electric current source capsule MN2 of current mirror MP2, should
The source electrode connecting detection resistance Rsi2 of current mirror MP2 and drain electrode and the resistance RM that detection pipe Ms is connected to by detection resistance Rsi2
Tie point；The source electrode of electric current source capsule MN2 is grounded；The drain electrode of detection electric current output mos pipe MP3 connects output resistance Rso
And be grounded by output resistance Rso, extracted current is examined between the drain electrode and output resistance Rso of detection electric current output mos pipe MP3
The grid of slowdown monitoring circuit output voltage terminal Vs, detection electric current output mos pipe MP3 and the source electrode and electric current source capsule MN2 of current mirror MP2
Drain electrode be connected, the source electrode of detection electric current output mos pipe MP3 is connected to drain electrode and the detection resistance Rsi1 of current mirror MP1
Tie point；The one end compensating electric capacity Cg connects power vd D, the grid of other end connecting detection electric current output mos pipe MP3.
Structure of the invention design is simple, reasonable, and reaction speed faster, lead by the period minimum for reducing current-mode Switching Power Supply
The logical time, minimum output voltage, improves load jump characteristic etc. at minimum duty cycle, and in the Switching Power Supply of other modes
In chip circuit, the reaction time of current protection mechanism is accelerated.
Claims (2)
1. one kind is suitable for switch power supply current quick detection circuit, it is characterised in that: the detection circuit is by electric current source capsule MN1
With MN2, current mirror MP1 and MP2, detection electric current output mos pipe MP3, detection pipe Ms, HS PowerMOS power tube, LS
PowerMOS power tube, detection resistance Rsi, output resistance Rso, detection resistance K*Rsi, resistance RM connect group with compensating electric capacity Cg
At；
The source electrode of the LS PowerMOS power tube is grounded, and drain connection switch power supply chip output port SW, and grid connection is opened
Powered-down source control circuit output port LSG；The source electrode connection switch power supply chip output port of the HS PowerMOS power tube
SW, drain connection switch power supply chip input power port VDD, grid connection switch power control circuit output port HSG；Institute
The source electrode connection switch power supply chip output port SW of detection pipe Ms is stated, drain electrode connects the resistance RM and passes through the resistance RM
Connection switch power supply chip input power port VDD, grid connection switch power control circuit output port HSG；The electric current
The drain electrode of mirror MP1 connects the drain electrode of the electric current source capsule MN1, and the source electrode of the current mirror MP1 connects the detection resistance Rsi simultaneously
By the detection resistance Rsi connection switch power supply chip input power port VDD, the grid of the current mirror MP1 connects institute
State the drain electrode of electric current source capsule MN1；The source electrode of the electric current source capsule MN1 is grounded, and grid connects biased electrical pressure side VB；The current mirror
The drain electrode of MP2 connects the drain electrode of the electric current source capsule MN2, and the source electrode of the current mirror MP2 connects the detection resistance K*Rsi simultaneously
The drain electrode of the detection pipe Ms and the tie point of resistance RM are connected to by the detection resistance K*Rsi；The electric current source capsule MN2
Source electrode ground connection；The drain electrode of the detection electric current output mos pipe MP3 connects the output resistance Rso and by the output electricity
Hinder Rso ground connection, extracted current detection circuit between the drain electrode and the output resistance Rso of the detection electric current output mos pipe MP3
Output voltage terminal Vs, the grid of the detection electric current output mos pipe MP3 and the source electrode and the current source of the current mirror MP2
The drain electrode of pipe MN2 is connected, and the source electrode of the detection electric current output mos pipe MP3 is connected to the drain electrode and detection of the current mirror MP1
The tie point of resistance Rsi；The one end the compensating electric capacity Cg connects power vd D, and the other end connects the detection electric current output mos pipe
The grid of MP3.
2. being suitable for switch power supply current quick detection circuit as described in claim 1, which is characterized in that the current detecting
The relational expression of output voltage Vs and power tube current IL when circuit works normally are as follows:
RdsonMs is the conducting resistance of detection pipe Ms in above formula, and IB is the bias current flowed through in electric current source capsule MN1 and MN2；On
(k+1) IB*Rso is the output voltage that the mismatch being intentionally introduced into generates, (RdsonH/Rsi) * (RdsonMs/ (RdsonMs+ in formula
RM)) with power tube current IL at fixed proportion.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811170641.6A CN109254188B (en) | 2018-10-09 | 2018-10-09 | High-speed current detection circuit suitable for switching power supply |
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| CN201811170641.6A CN109254188B (en) | 2018-10-09 | 2018-10-09 | High-speed current detection circuit suitable for switching power supply |
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| CN109254188B CN109254188B (en) | 2023-12-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111208337A (en) * | 2020-01-10 | 2020-05-29 | 南京能瑞自动化设备股份有限公司 | Current sampling circuit and current detection system |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005341730A (en) * | 2004-05-27 | 2005-12-08 | Murata Mfg Co Ltd | Overcurrent protective circuit |
| US20060028192A1 (en) * | 2004-08-02 | 2006-02-09 | Matsushita Electric Industrial Co., Ltd. | Current detection circuit and switching power supply using the same |
| CN103023324A (en) * | 2012-11-21 | 2013-04-03 | 东南大学 | Fast transient response DC-DC (direct-current to direct-current) switching converter with high load regulation rate |
| CN104734498A (en) * | 2015-04-13 | 2015-06-24 | 无锡新硅微电子有限公司 | DC-DC voltage rising module and voltage rising module overvoltage protection circuit |
| CN105699915A (en) * | 2016-02-02 | 2016-06-22 | 苏州美思迪赛半导体技术有限公司 | Self-adaption dynamic detection circuit for switch power source |
| CN205544930U (en) * | 2016-01-28 | 2016-08-31 | 深圳韩倍达电子科技有限公司 | Take USB power supply switch circuit of protection circuit |
| CN207352505U (en) * | 2017-08-22 | 2018-05-11 | 成都信息工程大学 | A kind of non-resistance formula high-precision low-power consumption a reference source |
| CN108270357A (en) * | 2016-12-30 | 2018-07-10 | 比亚迪股份有限公司 | Switching Power Supply and its feedforward compensation circuit |
| CN108599535A (en) * | 2018-07-09 | 2018-09-28 | 成都信息工程大学 | A kind of self-adaptable slop compensation circuit suitable for Peak Current Mode BUCK converters |
| CN214097598U (en) * | 2018-10-09 | 2021-08-31 | 成都信息工程大学 | A high-speed current detection circuit suitable for switching power supply |
-
2018
- 2018-10-09 CN CN201811170641.6A patent/CN109254188B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005341730A (en) * | 2004-05-27 | 2005-12-08 | Murata Mfg Co Ltd | Overcurrent protective circuit |
| US20060028192A1 (en) * | 2004-08-02 | 2006-02-09 | Matsushita Electric Industrial Co., Ltd. | Current detection circuit and switching power supply using the same |
| CN103023324A (en) * | 2012-11-21 | 2013-04-03 | 东南大学 | Fast transient response DC-DC (direct-current to direct-current) switching converter with high load regulation rate |
| CN104734498A (en) * | 2015-04-13 | 2015-06-24 | 无锡新硅微电子有限公司 | DC-DC voltage rising module and voltage rising module overvoltage protection circuit |
| CN205544930U (en) * | 2016-01-28 | 2016-08-31 | 深圳韩倍达电子科技有限公司 | Take USB power supply switch circuit of protection circuit |
| CN105699915A (en) * | 2016-02-02 | 2016-06-22 | 苏州美思迪赛半导体技术有限公司 | Self-adaption dynamic detection circuit for switch power source |
| CN108270357A (en) * | 2016-12-30 | 2018-07-10 | 比亚迪股份有限公司 | Switching Power Supply and its feedforward compensation circuit |
| CN207352505U (en) * | 2017-08-22 | 2018-05-11 | 成都信息工程大学 | A kind of non-resistance formula high-precision low-power consumption a reference source |
| CN108599535A (en) * | 2018-07-09 | 2018-09-28 | 成都信息工程大学 | A kind of self-adaptable slop compensation circuit suitable for Peak Current Mode BUCK converters |
| CN214097598U (en) * | 2018-10-09 | 2021-08-31 | 成都信息工程大学 | A high-speed current detection circuit suitable for switching power supply |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111208337A (en) * | 2020-01-10 | 2020-05-29 | 南京能瑞自动化设备股份有限公司 | Current sampling circuit and current detection system |
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