CN106655777A - Switching power supply output cable pressure drop compensating circuit and compensating method - Google Patents
Switching power supply output cable pressure drop compensating circuit and compensating method Download PDFInfo
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- CN106655777A CN106655777A CN201710088841.6A CN201710088841A CN106655777A CN 106655777 A CN106655777 A CN 106655777A CN 201710088841 A CN201710088841 A CN 201710088841A CN 106655777 A CN106655777 A CN 106655777A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention discloses a switching power supply output cable pressure drop compensating circuit and a compensating method. The switching power supply output cable pressure drop compensating circuit comprises a power management chip and a transformer, wherein an auxiliary winding of the transformer is connected to a feedback pin of the power management chip through a detection resistor; the power management chip is used for detecting primary side peak current of the transformer to realize detection for load change. The switching power supply output cable pressure drop compensating circuit also comprises a primary side mid-value sampling circuit, a low-pass filtering circuit and a compensating current switching circuit, wherein the primary side mid-value sampling circuit is a sample hold circuit for the primary side current of the transformer; the low-pass filtering circuit is used for carrying out duty cycle modulation processing on a primary side current mid-value signal to output compensating voltage through voltage of the feedback pin, and the compensating voltage is output to the compensating current switching circuit; and the compensating current switching circuit is used for switching the compensating voltage into compensating current output to the feedback pin for compensation. Accuracy control for output voltage of a switching power supply cable terminal can be realized in a discontinuous mode and a continuous mode, so that the output voltage of the cable terminal does not change along with the load change.
Description
Technical field
The present invention relates to Switching Power Supply and technical field of semiconductors, more particularly to a kind of charging to Switching Power Supply (SMPS)
The voltage cable compensation circuit that the voltage drop that cable is produced is compensated.
Background technology
Switch power technology mainly realizes the conversion of electric energy by power inverter, it is not necessary to using power frequency transformation
Device, with small volume, lightweight advantage, is widely used in the fields such as LED illumination, communication apparatus, consumer electronics.
Switching Power Supply generally provides constant current (CC patterns) or constant voltage (CV patterns) to output, constant current or
The output of person's constant voltage is all by detecting that load condition is realized.Load condition detection typically has two methods：Secondary is controlled
And primary-side-control (PSR) (SSR).
Secondary control generally by opto-coupled feedback load condition, can direct reflected load state.Secondary control is anti-
The aspects such as interference performance, job stability and efficiency of transmission have very big advantage, but secondary control needs to increase extra device
Part, high cost, volume is big.
Primary-side-control is by the ancillary coil feedback load state of transformer, it is not necessary to optic coupling element, loop compensation and steady
Voltage device, simplifies the design of chip periphery backfeed loop, has reached the purpose for saving system cost and space.
Fig. 1 is a kind of Switching Power Supply 100 of employing primary-side-control.The circuit board terminal output voltage of Switching Power Supply 100 is
Vcap, the cable termination output voltage of Switching Power Supply 100 is Vload, circuit board terminal and the cable termination of Switching Power Supply 100 lead to
Cross output cable cable couplings.Pulse width or pulse frequency that Switching Power Supply 100 passes through adjustment DRIVE, holding circuit plate
Terminal output voltage VcapIt is constant.The conduction impedance of output cable cable is not converted, output cable cable with load change
The pressure drop at two ends can change with load change, cause cable termination output voltage to change with load change.
Traditional output cable voltage-drop compensation method by detect former limit peak point current, and to former limit peak point current at
Reason, realizes load change detection, it is ensured that cable termination output voltage is constant.But under continuous control pattern, former limit peak value electricity
Stream is not necessarily associated with load change, therefore traditional output cable voltage-drop compensation method is only applicable to intermittent controlled pattern
(DCM) in, it is impossible to ensure to provide accurate output cable voltage-drop compensation under continuous control pattern (CCM).
The content of the invention
Goal of the invention：In order to solve the problems, such as prior art, it is ensured that in intermittent controlled pattern and continuous control pattern
The lower precise control for realizing Switching Power Supply cable terminal output voltage, the present invention provides a kind of Switching Power Supply output cable pressure drop and mends
Repay circuit.
It is a further object of the present invention to provide a kind of Switching Power Supply output cable voltage-drop compensation method.
Technical scheme：A kind of Switching Power Supply output cable voltage-drop compensation circuit, including power management chip and transformer, become
The assists winding of depressor is connected to the feedback pin of power management chip, the power management by detection resistance Ra and detection resistance Rb
Chip is used to detect that transformer primary side peak point current realizes load change detection, including primary current intermediate value sample circuit, low pass
Filter circuit and compensation current converter circuit, the primary current intermediate value sample circuit keeps for the sampling of primary side current of transformer
Circuit, low-pass filter circuit carries out duty ratio modulation process output compensation electricity to primary current med signal by feeding back pin voltage
Pressure, offset voltage is exported to compensation current converter circuit, and the compensation current converter circuit is used to for offset voltage to be converted to benefit
Repay electric current export to feedback pin compensate.
Further, the low-pass filter circuit includes operational amplifier I401, comparator I402, phase inverter I403, first open
Close S402, second switch S403, filter resistance R401, filter capacitor C402, operational amplifier I401Input lotus root in the same direction be connected to former limit
The output end of electric current intermediate value sample circuit, reverse input end connects output end, and output end Jing first switch connects RC low pass filters；Than
Compared with device I402In-phase input end lotus root be connected to feedback pin, comparator I402Inverting input lotus root meet reference voltage, comparator I402's
Output end controls first switch S402, comparator I402Output end pass through phase inverter I403Control second switch S403, second switch
S403One section of ground connection, another termination RC low pass filters, RC low pass filters output connects compensation current converter circuit.
Further, the compensation current converter circuit includes operational amplifier I404, resistance R402, triode M401, electric current
Scaling circuitry, operational amplifier I404Input lotus root in the same direction meet the output of low-pass filter circuit, operational amplifier I404's
Output termination triode M401Base stage, triode M401Emitter stage Jing resistance R402Ground connection, operational amplifier I404Reverse input end
Meet triode M401Emitter stage, triode M401Colelctor electrode is connect by triode M402With triode M403The current ratio conversion electricity of composition
Road.
Further, the former limit intermediate value sample circuit includes sampling switch S401With sampling capacitance C401, sampling switch S401
Connect C with sampling capacitance401, sampling capacitance C401The other end is grounded, sampling capacitance C401On voltage be primary current intermediate value letter
Number.
Further, the primary current intermediate value sample circuit, low-pass filter circuit and compensation current converter circuit are integrated
In power management chip.
A kind of Switching Power Supply output cable voltage-drop compensation method, comprises the following steps：
(1) primary current of transformer is carried out into sampling holding, obtains sampled voltage signal；
(2) a voltage threshold is set, the detection electricity that the electric current in transformer assists winding is obtained Jing after resistance sampling
Pressure is compared with the voltage threshold, if detection voltage is more than voltage threshold, the sampled voltage signal Jing in step (1) delays
Rush circuit output to be filtered to low pass filter；If detection voltage is less than voltage threshold, the input of low pass filter is low
Level, after low-pass filtered circuit filtering voltage is compensated；
(3) offset voltage is converted to compensation electric current by compensating current converter circuit, and will compensation electric current be input into
The feedback pin of power management chip.
Further, the method for sampling is in the step (1)：It is former in the midpoint control of a primary current opening time
Side intermediate value sample circuit conducting, is sampled, and sampling remains to the midpoint moment cut-off of next primary current opening time.
Beneficial effect：A kind of Switching Power Supply output cable voltage-drop compensation circuit that the present invention is provided, can be in discontinuous mode
With the precise control that split powered-down source power cable terminal output voltage is realized under continuous mode, make cable termination output voltage not with negative
Carry change and change；The circuit system is stable, low cost, small volume, lightweight.
A kind of Switching Power Supply output cable voltage-drop compensation method that the present invention is provided, it is possible to achieve Switching Power Supply cable terminal
The precise control of output voltage, makes cable termination output voltage not change with load change, overcomes prior art and is only suitable for
The drawbacks of discontinuous mode, discontinuous mode and continuous mode are applicable.
Description of the drawings
Fig. 1 is a kind of Switching Power Supply of employing primary-side-control；
Fig. 2 is the oscillogram of the primary current, secondary current and feedback voltage under Fig. 1 intermittent controlled patterns；
Fig. 3 is the oscillogram of the primary current, secondary current and feedback voltage under Fig. 1 continuous control patterns；
Fig. 4 is the Switching Power Supply output cable voltage-drop compensation circuit diagram of the present invention；
Fig. 5 is the schematic diagram of the primary current intermediate value sample circuit in Fig. 4；
Fig. 6 is the schematic diagram of the low-pass filter circuit in Fig. 4；
Fig. 7 is the schematic diagram of the compensation current converter circuit in Fig. 4.
Specific embodiment
Below in conjunction with the accompanying drawings the invention will be further described with specific embodiment.
Fig. 1 is a kind of Switching Power Supply 100 of employing primary-side-control, including power management chip 101 and transformer 102, is become
The assists winding 103 of depressor 102 is connected to the feedback pin of power management chip 101 by detection resistance Ra and detection resistance Rb
104FB ports, the power management chip 101 is used to detect that the peak point current of transformer primary side 105 realizes load change detection.Open
The circuit board terminal output voltage in powered-down source 100 is Vcap, the cable termination output voltage of Switching Power Supply 100 is Vload, switch electricity
The circuit board terminal in source 100 is coupled with cable termination by output cable cable.Switching Power Supply 100 is by adjusting power management
The pulse width or pulse frequency of the DRIVE pins output of chip 101, holding circuit board terminal output voltage VcapIt is constant.
Switching Power Supply 100 adopts inverse-excitation type isolation architecture, and (armature winding N is included by transformerP, secondary windings NS, it is auxiliary
Help winding NA) isolating primary side and primary side.
Wherein, NAIt is the assists winding number of turn, NSIt is the vice-side winding number of turn, VauxIt is the pressure drop in assists winding, VsecIt is secondary
Pressure drop on winding.
Have again
Wherein, VFBFor feed back pin 104 at be FB ports pressure drop.
Have again
Vsec=VD+IO*Rcable+Vload (3)
Wherein, VDIt is diode D6Forward conduction voltage drop, IOIt is load current, RcableIt is output cable equivalent resistance.
Can obtain
Power management chip 101 is by controlling VFBWith internal reference VREFIt is equal realizing output voltage VloadAdjustment,
It is considered that under stable condition, VFB=VREF, i.e. VFBIt is fixed value.R in formula (4)a、Rb、NA、NSIt is not change with load current
Fixed value, therefore VD+IO*Rcable+VloadIt is also fixed value, is set to fixed value K.Can obtain
Vload=K-VD-IO*Rcable (5)
Wherein VD is diode D6Forward conduction voltage drop, not with load current change.
As can be seen that the conduction impedance of output cable cable is not converted, cable cable with load change from formula (5)
Voltage drop IO*RcableCan increase with load current and increase, and then affect the load regulation of output voltage.It is defeated in order to ensure
Go out the load regulation of voltage, need to compensate the pressure drop on output cable.
Primary current I in Fig. 1PBy detection resistance RCSObtain, primary current IPFlow through RCSForm voltage drop VCS, i.e., it is former
Side electric current IP=VCS/RCS。
In the following description, the time that primary current is opened is named as Ton, secondary current open time named for
Tdemag, the time that primary current and secondary current are simultaneously turned off named as Toff, switch periods are named as T, while there is T=
Ton+Tdemag+Toff。
Intermittent controlled pattern generally refers to the release of transformer magnetic energy and finishes or exciting curent drops to zero, after one section of time delay
Primary side switch is opened again.Former limit valley point current under intermittent controlled pattern is zero, and primary current is started from scratch rising, primary current
Waveform is sawtooth waveforms.Intermittent controlled pattern primary current and secondary current in delay number are simultaneously turned off.
The oscillogram of the primary current, secondary current and feedback voltage that are illustrated in figure 2 under intermittent controlled pattern.In Fig. 2
IP,peakIt is former limit peak point current, I under intermittent controlled patternP,midIt is 1/2T under intermittent controlled patternonWhen primary current,
IS,peakIt is secondary peak point current under intermittent controlled pattern.
According to Fig. 2, the output average electric current I under intermittent controlled patternODFor：
Continuous control pattern generally refer to transformer magnetic energy not yet discharge finish or when exciting curent does not drop to zero it is former
Side switch is again turned on.Even the former limit valley point current under control model is not zero, and primary current never drops to zero excitatory electricity
Stream begins to ramp up, and primary current is side trapezoidal wave.There is no primary current and secondary electricity in switch periods in continuous control pattern
The moment that stream is simultaneously turned off.
The oscillogram of the primary current, secondary current and feedback voltage that are illustrated in figure 3 under continuous control pattern, can see
Go out T in Fig. 3off=0.I in Fig. 3P,TIt is former limit peak point current, I under continuous control patternP,BIt is former limit paddy under continuous control pattern
Value electric current, IP,midIt is 1/2T under continuous control patternonWhen primary current, IS,TIt is secondary peak value electricity under continuous control pattern
Stream, IS,BIt is secondary valley point current under continuous control pattern.
According to Fig. 3, the output average electric current I under continuous control patternOCFor：
From equation (6) and equation (7) as can be seen that the output average electric current under intermittent controlled pattern and continuous control pattern
It is relevant with primary current intermediate value, can obtain：
From equation (8) as can be seen that no matter intermittent controlled pattern or continuous control pattern, as long as obtaining in primary current
Value IP,mid, degaussing duty ratio of time Tdemag/ T, primary transformer coil and secondary coil turn ratio NP/NS, it is possible to exported
Electric current IO.And then output voltage can be adjusted according to output average electric current difference, realize the purpose of output cable voltage-drop compensation.
Fig. 4 is the present embodiment Switching Power Supply output cable voltage-drop compensation circuit, and output cable voltage-drop compensation circuit includes original
Side electric current intermediate value sample circuit 201, low-pass filter circuit 202, compensation current converter circuit 203.Primary current intermediate value sampling electricity
The input on road 201 is primary current, and sampling holding is carried out to primary current intermediate value, and is exported to low-pass filter circuit 202.Low pass
Filter circuit 202 passes through detection voltage VFBDuty ratio modulation process is carried out to primary current intermediate value, and acquired results is carried out low
Pass filter, it is ensured that the stability of a system；LPF result and the linear proportionate relationship of output average electric current, and export to compensation electricity
Stream change-over circuit 203.Compensation electric current conversion line 203 is converted by V-I and appropriate transformation of scale is converted to offset voltage
Compensation electric current, and the cable voltage-drop compensation electric current is exported to the feedback pin FB ports of power management chip 101；Cable pressure drop is mended
Repay electric current and flow through resistance RaAnd RbPressure drop is formed, changes voltage VFB, realize the purpose of cable voltage-drop compensation；By the R for adjustingaWith
RbValue, can adjust cable voltage-drop compensation.
Fig. 5 is the embodiment of primary current intermediate value sample circuit one in Fig. 4.Primary current intermediate value sample circuit includes sampling
Switch S401And sampling capacitance C401.Sampling switch S401In 1/2TonMoment turns on, and primary current intermediate value is exported to sampling capacitance
C401, sampling capacitance C401Primary current intermediate value is remained into next 1/2TonMoment arrives.Sampling capacitance C401The electricity of upper preservation
Pressure value is intermediate value V of the switch periods primary currentCS,mid。
Fig. 6 is the embodiment of low-pass filter circuit one in Fig. 4.Low-pass filter circuit includes operational amplifier I401, comparator
I402, phase inverter I403, switch S402、S403, filter resistance R401, filter capacitor C402.Operational amplifier I401In-phase input end lotus root
It is connected to the output end of primary current intermediate value sample circuit, i.e. operational amplifier I401The input voltage of buffer circuit of composition be
VCS,mid, therefore the inverting input and output end voltage of operational amplifier I401 is VCS,mid.Comparator I402Output end control
Switch S402, comparator I402Output end pass through phase inverter I403Controlling switch S403.Comparator I402In-phase input end be connected to
VFB, comparator I402Inverting input be connected to reference voltage Vzcd.Work as VFBMagnitude of voltage is more than VzcdDuring magnitude of voltage, correspondence Fig. 2
And the T in Fig. 3demagTime period, now controlling switch S402Open, filter resistance R401And filter capacitor C402The low pass filtered of composition
The input of ripple unit is VCS,mid.Work as VFBMagnitude of voltage is less than VzcdDuring magnitude of voltage, T in correspondence Fig. 2onAnd ToffIn time period and Fig. 3
TonTime period, now controlling switch S403Open, filter resistance R401And filter capacitor C402The low-pass filter unit of composition it is defeated
Enter for 0.Filter resistance R401And filter capacitor C402The output voltage of the low-pass filter unit of composition is VCS,mid*Tdemag/T。
Fig. 7 is an embodiment of the compensation current converter circuit in Fig. 4.Compensation current converter circuit includes operational amplifier
I404, resistance R402, triode M401～M403.Operational amplifier I404, resistance R402, M401Composition Voltage-current conversion circuit.Voltage turns
The input of current circuit is connected to the output of low-pass filter circuit, the i.e. input of Voltage-current conversion circuit for voltage VCS,mid*
Tdemag/T.Through Voltage-current conversion circuit conversion, Voltage-current conversion circuit is output as electric current VCS,mid*Tdemag/T/R402.Three
Pole pipe M402And M403Composition current ratio translation circuit 204, current ratio conversion ratio is k.I.e. final output is to chip FB ends
Compensation current is k*VCS,mid*Tdemag/T/R402。
According to formula (8), electric current k*V is compensatedCS,mid*Tdemag/T/R402With output average electric current IOThere is proportionate relationship, pass through
Set suitable current transformation and compare k, it is possible to achieve compensation electric current is with output average electric current IOChange and change, and then realize line loss
The purpose of compensation.
Claims (7)
1. a kind of Switching Power Supply output cable voltage-drop compensation circuit, including power management chip (101) and transformer (102), become
The assists winding (103) of depressor (102) is connected to the feedback of power management chip (101) by detection resistance Ra and detection resistance Rb
Pin (104), the power management chip (101) realizes load change detection for detecting transformer primary side (105) peak point current,
Characterized in that, including primary current intermediate value sample circuit (201), low-pass filter circuit (202) and compensation current converter circuit
(203), the primary current intermediate value sample circuit (201) for primary side current of transformer sampling hold circuit, LPF electricity
Road (202) carries out duty ratio modulation process output offset voltage to primary current med signal by feeding back pin (104) voltage, mends
Voltage output is repaid to current converter circuit (203) is compensated, the current converter circuit (203) that compensates is for offset voltage to be changed
Export to feedback pin (104) for compensation electric current and compensate.
2. Switching Power Supply output cable voltage-drop compensation circuit according to claim 1, it is characterised in that the LPF
Circuit (202) is including operational amplifier I401, comparator I402, phase inverter I403, first switch S402, second switch S403, filtered electrical
Resistance R401, filter capacitor C402, operational amplifier I401Input lotus root in the same direction be connected to primary current intermediate value sample circuit (201)
Output end, reverse input end connects output end, and output end Jing first switch connects RC low pass filters；Comparator I402Homophase input
Lotus root is connected to feedback pin (104), comparator I at end402Inverting input lotus root meet reference voltage, comparator I402Output end control the
One switch S402, comparator I402Output end pass through phase inverter I403Control second switch S403, second switch S403One section of ground connection,
Another termination RC low pass filters, RC low pass filters output connects compensation current converter circuit (203).
3. Switching Power Supply output cable voltage-drop compensation circuit according to claim 1 and 2, it is characterised in that the compensation
Current converter circuit (203) is including operational amplifier I404, resistance R402, triode M401, current ratio translation circuit (204), fortune
Calculate amplifier I404Input lotus root in the same direction meet the output of low-pass filter circuit (202), operational amplifier I404Output termination three
Pole pipe M401Base stage, triode M401Emitter stage Jing resistance R402Ground connection, operational amplifier I404Reverse input end meet triode M401
Emitter stage, triode M401Colelctor electrode is connect by triode M402With triode M403The current ratio translation circuit (204) of composition.
4. Switching Power Supply output cable voltage-drop compensation circuit according to claim 1 and 2, it is characterised in that the former limit
Intermediate value sample circuit (201) is including sampling switch S401With sampling capacitance C401, sampling switch S401Connect C with sampling capacitance401, adopt
Sample electric capacity C401The other end is grounded, sampling capacitance C401On voltage be primary current med signal.
5. Switching Power Supply output cable voltage-drop compensation circuit according to claim 1 and 2, it is characterised in that the former limit
Electric current intermediate value sample circuit (201), low-pass filter circuit (202) and compensation current converter circuit (203) are integrated in power management
In chip (101).
6. the compensation method of the Switching Power Supply output cable voltage-drop compensation circuit as described in claim 1 to 5, it is characterised in that
Comprise the following steps：
(1) primary current of transformer is carried out into sampling holding, obtains sampled voltage signal；
(2) set a voltage threshold, the detection voltage that the electric current in transformer assists winding is obtained Jing after resistance sampling with
The voltage threshold is compared, if detection voltage is more than voltage threshold, the buffered electricity of sampled voltage signal in step (1)
Road exports to low pass filter and is filtered；If detection voltage is less than voltage threshold, the input of low pass filter is low level,
Voltage is compensated after low-pass filtered circuit filtering；
(3) offset voltage is converted to compensation electric current by compensating current converter circuit, and compensation electric current is input into power supply
The feedback pin of managing chip.
7. the compensation method of Switching Power Supply output cable voltage-drop compensation circuit according to claim 6, it is characterised in that institute
Stating the method for sampling in step (1) is：In midpoint control former limit intermediate value sample circuit (201) of a primary current opening time
Conducting, is sampled, and sampling remains to the midpoint moment cut-off of next primary current opening time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710088841.6A CN106655777B (en) | 2017-02-20 | 2017-02-20 | Voltage drop compensation circuit and compensation method for output cable of switching power supply |
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| CN201710088841.6A CN106655777B (en) | 2017-02-20 | 2017-02-20 | Voltage drop compensation circuit and compensation method for output cable of switching power supply |
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| CN107968583A (en) * | 2017-12-20 | 2018-04-27 | 上海贝岭股份有限公司 | Line loss compensation device, integrated circuit and the Switching Power Supply of Switching Power Supply |
| CN110086338A (en) * | 2019-05-21 | 2019-08-02 | 重庆大学 | A kind of line loss compensation circuit of DC/DC converter |
| CN111711345B (en) * | 2020-06-23 | 2022-03-22 | 成都芯源系统有限公司 | Driving method, driving circuit and switching power supply thereof |
| CN111711345A (en) * | 2020-06-23 | 2020-09-25 | 成都芯源系统有限公司 | Driving method, driving circuit and switching power supply thereof |
| CN112366961A (en) * | 2020-10-30 | 2021-02-12 | 株洲中车时代电气股份有限公司 | Power supply system of remote control underwater robot ROV and control method thereof |
| CN113162368B (en) * | 2021-03-11 | 2023-02-10 | 成都芯源系统有限公司 | DCR current sampling circuit and method and related control circuit |
| CN113162368A (en) * | 2021-03-11 | 2021-07-23 | 成都芯源系统有限公司 | DCR current sampling circuit and method and related control circuit |
| CN113489341B (en) * | 2021-07-29 | 2022-07-26 | 成都芯源系统有限公司 | Control circuit of switching power supply and control method thereof |
| CN113489341A (en) * | 2021-07-29 | 2021-10-08 | 成都芯源系统有限公司 | Control circuit of switching power supply and control method thereof |
| CN117118236A (en) * | 2023-10-19 | 2023-11-24 | 上海芯龙半导体技术股份有限公司 | Power chip and power supply structure |
| CN117118236B (en) * | 2023-10-19 | 2024-02-02 | 上海芯龙半导体技术股份有限公司 | Power chip and power supply structure |
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