CN2822024Y - DC/DC power module with low voltage regulation rate and negative regulation rate - Google Patents
DC/DC power module with low voltage regulation rate and negative regulation rate Download PDFInfo
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- CN2822024Y CN2822024Y CN 200520044482 CN200520044482U CN2822024Y CN 2822024 Y CN2822024 Y CN 2822024Y CN 200520044482 CN200520044482 CN 200520044482 CN 200520044482 U CN200520044482 U CN 200520044482U CN 2822024 Y CN2822024 Y CN 2822024Y
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Abstract
The utility model discloses a DC/DC power module with a low voltage regulation rate and a load regulation rate. The utility model is characterized in that the DC/DC power module with a low voltage regulation rate and a load regulation rate comprises a power conversion main loop and a control loop, wherein in the power conversion main loop, a direct-current input circuit, a power conversion circuit, a full-wave rectification circuit, and a filter circuit are sequentially connected; in the control loop, the input ends of an input voltage feedforward circuit and an input undervoltage protection circuit are connected with the power conversion main loop. The input end of a pulse-width modulation control circuit is respectively connected with the output ends of a remote switching circuit, an output voltage feedback circuit, and an output overcurrent protection circuit, and an output overvoltage protection circuit, and the output end of the pulse-width modulation control circuit is connected with the input end of a switch driving circuit. The output end of the switch driving circuit is connected with the input end of the power conversion main loop. The input ends of the output voltage feedback circuit, the output overcurrent protection circuit and the output overvoltage protection circuit are respectively connected with the output end of the power conversion main loop. The utility model has the advantages of wide voltage inputting range, low voltage regulation, load regulation, direct-current output of low voltage high current, and high power density.
Description
Technical field
The utility model relates to a kind of device for converting electric energy, relate in particular to a kind of DC/DC power module with low-voltage regulation and load regulation, be applicable to the wide-range voltage input, the voltage transitions in the electric power system that the high power density requirement is arranged of low-voltage, high-current direct current output power supply.
Background technology
Along with the equipment in communication and the industrial control system to miniaturization, the development of low-power consumption direction, the demand of DC/DC power module that low-voltage, high-current is had high power density is increasing, and is used in the DC/DC module in these systems at present, and often volume is very big, power density is not high, input voltage range is narrow, and voltage regulation and load regulation are higher, and load capacity is poor, what output voltage rose when unloaded is very high, and what output voltage fell again during bringing onto load is very low; Input voltage changes, and output voltage and then changes, and alters a great deal; Defencive function imperfections such as overvoltage, under-voltage, overcurrent or the like, these situations can not adaptive system to the requirement of reliability.
Summary of the invention
The utility model is that existing DC/DC module input voltage range is narrow in order to solve, voltage regulation and load regulation is higher, load capacity is poor and volume big, power density is not high problem, and the DC/DC power module with low-voltage regulation and load regulation of a kind of wide-range voltage input, low-voltage regulation and the load regulation, the output of low-voltage, high-current direct current and the high power density that propose.
The technical scheme that the utility model is taked is: have the DC/DC power module of low-voltage regulation and load regulation, be characterized in, comprise Power Conversion major loop and control loop;
Described Power Conversion major loop comprises that the direct voltage to input carries out the direct-flow input circuit of smothing filtering, realizes that described input circuit, power conversion circuit, full-wave rectifying circuit and filter circuit are linked in sequence from power conversion circuit, full-wave rectifying circuit and the filter circuit of high voltage-small current to the conversion of low-voltage, high-current;
Described control loop comprises that one is used to control circuit for pulse-width modulation that the input voltage feed forward circuit of feedforward compensation is provided, one is used to control the pulse output of pulsewidth and the variation output voltage feedback circuit of rapid responsive load, one is used for providing the input under-voltage protecting circuit of clamping voltage when input is under-voltage, one is used to realize the control circuit of Power Conversion, one is used to provide the switch driving circuit of drive signal, one is used for the output overcurrent protective circuit of setting module output overcurrent value, realize the output over-voltage protection circuit of low load regulation according to the variation of output voltage, one is used to control the output voltage feedback circuit of the pulse output of pulse-width modulation with the variation of responsive load, and the long-range machine open/close circuit of distant place control start and a shutdown; Wherein: described input voltage feed forward circuit is connected with the dc supply input of Power Conversion major loop with the input of input under-voltage protecting circuit; The input of described pwm control circuit is connected with the output of long-range machine open/close circuit, output voltage feedback circuit, output overcurrent protective circuit and output over-voltage protection circuit respectively, and the output of this pwm control circuit is connected with the input of switch driving circuit; The output of described switch driving circuit is connected with the output of Power Conversion major loop; The input of described output voltage feedback circuit, output overcurrent protective circuit and output over-voltage protection circuit is connected with the output of Power Conversion major loop respectively.
Above-mentioned DC/DC power module with low-voltage regulation and load regulation wherein, also comprises an auxiliary power circuit, and this auxiliary power circuit is used to control loop that power supply is provided.
Above-mentioned DC/DC power module with low-voltage regulation and load regulation, wherein, described pwm control circuit mainly is made of pwm chip and peripheral circuit thereof.
Above-mentioned DC/DC power module with low-voltage regulation and load regulation, wherein, described switch driving circuit mainly is made of the control switch pipe.
Above-mentioned DC/DC power module with low-voltage regulation and load regulation, wherein, described output overcurrent protective circuit mainly is made of operational amplifier and peripheral circuit thereof.
Above-mentioned DC/DC power module with low-voltage regulation and load regulation, it is characterized in that, power conversion circuit in the described power transforming main circuit is the zero voltage switch circuit, mainly by two power switchs, electric capacity between two power switchs and the transformer that is connected with switch constitute.
Because the utility model has adopted above technical scheme, the Power Conversion major loop adopts zero voltage switching technology, and line construction is simple, the conversion efficiency height; Control circuit adopts high performance voltage mode control chip and other integrated circuits; finish input voltage feed forward; the input under-voltage protection; remote on-off, output voltage overvoltage protection, defencive functions such as output current overcurrent protection; thereby realize the wide-range voltage input; low-voltage regulation and low load regulation, the major loop part realizes the high efficiency conversion of energy under the control of control circuit, finally export the output voltage of user's request.
Description of drawings
Concrete structure of the present utility model is further provided by following embodiment and accompanying drawing thereof.
Fig. 1 is the circuit block diagram that the utlity model has the DC/DC power module of low-voltage regulation and load regulation.
Fig. 2 is the circuit theory diagrams that the utlity model has the DC/DC power module of low-voltage regulation and load regulation.
Embodiment
See also Fig. 1, this is the circuit block diagram that the utlity model has the DC/DC power module of low-voltage regulation and load regulation.The utlity model has the DC/DC power module of low-voltage regulation and load regulation, comprise Power Conversion major loop 1 and control loop 2;
Described Power Conversion major loop 1 comprises direct-flow input circuit 11, power conversion circuit 12, full-wave rectifying circuit 13 and filter circuit 14, and described input circuit, power conversion circuit, full-wave rectifying circuit and filter circuit are linked in sequence.
Described control loop 2 comprises input voltage feed forward circuit 21, output voltage feedback circuit 22, input under-voltage protecting circuit 23, pwm control circuit 24, switch driving circuit 25, output overcurrent protective circuit 26, output over-voltage protection circuit 27 and long-range machine open/close circuit 28; Wherein: input voltage feed forward circuit 21 is connected with the dc supply input of Power Conversion major loop 1 with the input of input under-voltage protecting circuit 23; The input of pwm control circuit 24 is connected with the output of long-range machine open/close circuit 28, output voltage feedback circuit 22, output overcurrent protective circuit 26 and output over-voltage protection circuit 27 respectively, and the output of this pwm control circuit 24 is connected with the input of switch driving circuit 25; The output of switch driving circuit 25 is connected with the output of Power Conversion major loop 1; The input of output voltage feedback circuit 22, output overcurrent protective circuit 26 and output over-voltage protection circuit 27 is connected with the output of Power Conversion major loop 1 respectively.
Also comprise auxiliary power circuit 3, it is used for providing power supply for 2.
See also Fig. 2.Circuit theory diagrams of the present utility model.
The DC/DC power module that the utlity model has low-voltage regulation and load regulation comprises Power Conversion major loop 1, and it is made up of direct current input 11, power inverter 12, full-wave rectification 13, filtering 14 etc.
Direct-flow input circuit is used for the direct voltage of input is carried out smothing filtering.This direct-flow input circuit mainly is made of capacitor C 49, and direct voltage is connected on the two ends of electric capacity, and electric capacity plays the smothing filtering function.
Power conversion circuit is used for the conducting and the conversion of turn-offing realization power by power switch, realizes from the conversion of high voltage-small current to low-voltage, high-current.Functional block (A) is the Power Conversion major loop, and it is made up of direct current input, power inverter, full-wave rectification, filtering etc.The function of this part is the conversion of power, the input of the direct current of high voltage-small current is transformed to the direct current output of low-voltage, high-current.Input voltage is added in+the VIN terminal ,-the VIN terminal on, C49 is connected on+the VIN terminal and-the VIN terminal between, play the input filter action, constitute the direct current importation.Power inverter part is by switching tube Q1, D14, capacitor C 50, and transformer T101, T102 form, and finish the conversion of power.Full-wave rectification is made of Schottky diode D16, D17.The filtering part is made of capacitor C 31, C32, C33, C34, C35, C36, C53, C54 and filter inductance T4, and capacitor C 25, C26 are Y electric capacity, works the common mode disturbances effect of removing.Terminal V+, terminal V-are the output voltage terminal.
Full-wave rectifying circuit is used for the alternating current of coming from power conversion circuit is become direct current, is made of diode bridge rectifier circuit.
Filter circuit is used for the effect by filter capacitor, filter inductance, output voltage is become meet the direct voltage with low ripple voltage of customer requirements.
The DC/DC power module that the utlity model has low-voltage regulation and load regulation also comprises control loop 2, and control loop 2 comprises input voltage feed forward circuit 21, output voltage feedback circuit 22, input under-voltage protecting circuit 23, pwm control circuit 24, switch driving circuit 25, output overcurrent protective circuit 26, output over-voltage protection circuit 27 and long-range machine open/close circuit 28.Wherein:
Pwm chip IC3 is a high performance voltage mode pulse width modulating chip.1 pin of pwm chip IC3 is the fault counting input end, when the voltage that is input to this end surpasses the output that certain numerical value then stops the DC/DC module automatically.2 pin of pwm chip IC3 are current limliting input pins, when the voltage that is input to this end surpasses the output that certain numerical value then stops PWM automatically.3 pin of pwm chip IC3 are operating voltage inputs of chip.4 pin of pwm chip IC3 are PWM gate-drive outputs, through the directly shutoff and the conducting of driving power switch of switch driving circuit, thus the conversion of realization power.6 pin of pwm chip IC3 are electric voltage feed forward inputs, input voltage is input to this pin through being transformed into a certain proportion of voltage after the dividing potential drop, voltage on this pin provides a feedforward compensation, when changing, input voltage can adjust the conducting and the shutoff of switch rapidly by pwm chip IC3, output voltage is remained unchanged, thereby realize the low-voltage regulation of DC/DC module, respond the variation of input voltage rapidly.8 pin of pwm chip IC3 are output voltage feedback input ends, and every the output voltage feedback is incorporated into this pin, the pulse of this pin control PWM is exported by a light.9 pin of pwm chip IC3 are to be used to provide a fixing voltagesecond product restriction.7 pin of pwm chip IC3 are by potentiometer W2 ground connection, adjust the resistance of resistance by potentiometer W2, promptly adjust the charging interval of oscillator electric capacity.10 pin of pwm chip IC3 are by a capacity earth, and this electric capacity is exactly oscillator electric capacity, the frequency of oscillation of the time that the discharges and recharges decision oscillator of oscillator electric capacity.5,13 pin of pwm chip IC3 are grounding pin, 12 pin are+and the accurate reference voltage output pin of 5VDC, 14 pin are soft start pins, are connected on the electric capacity on this pin, the functions such as soft-start time of resistance decision DC/DC module.1 pin of pwm chip IC3 connects the output over-voltage protection circuit, and its 2 pin connects the output overcurrent protective circuit, and its 4 pin connects switch driving circuit.Pwm chip IC3 inside is integrated with integrated oscillator/electric voltage feed forward compensation, accurate duty ratio restriction, accurate voltagesecond product clamp, and failure count automatically shuts down, the functions such as peak value gate-drive output of big electric current.
Input voltage feed forward circuit 21 is used for input voltage is transformed into 6 pin that are input to pwm chip IC3 with the proportional voltage of input voltage after sampling, voltage on this pin provides a feedforward compensation, when changing, input voltage can adjust the conducting and the shutoff of switch rapidly by pwm chip IC3, output voltage is remained unchanged, thereby realize the low-voltage regulation of DC/DC module, respond the variation of input voltage rapidly.
Input under-voltage protecting circuit 23 is used for whole module being protected when under-voltage.When input voltage is imported in normal scope; this protective circuit is failure to actuate; when input voltage during less than 200VDC; promptly import when under-voltage; this protective circuit action; the feasible voltage that is input to 6 pin of pwm chip IC3 is clamped on the very little fixed voltage value, makes the DC/DC module stop output.This input under-voltage protecting circuit mainly is made of bleeder circuit, sampling input voltage and operational amplifier IC2A.Wherein: resistance R 29, R28, R27, the bleeder circuit that resistance R 10 is formed.The reference voltage that constitutes by VCC2, resistance R 77, resistance R 78 by operational amplifier IC2A amplification ratio after, thereby whether 45 decision triode Q3 are open-minded by resistance R 80, capacitor C, when importing in the normal range (NR) of input voltage at 200-400VDC, triode Q3 is failure to actuate, when input voltage less than 200VDC, promptly import when under-voltage, triode Q3 action, make the collector voltage of triode Q3 near 0V, thereby the voltage that is input to 6 pin of pwm chip IC3 is clamped on the fixed voltage value by diode D19.
Output voltage feedback circuit 22 is used for output voltage is compared with the setting reference voltage after sampling, every IC4 the output voltage feedback is incorporated into 8 pin of pwm chip IC3 by light, the pulse output of voltage control PWM on this pin, thereby output voltage is remained unchanged, realize the low load regulation of DC/DC module, rapidly the variation of responsive load.The output voltage feedback circuit can respond the variation of output voltage and load fast, and output voltage is remained unchanged.Terminal+S, terminal-S are distant place sampling terminal, and terminal TRM is that output voltage is adjusted terminal.Resistance R 57, potentiometer W3, resistance R 37 output voltage feedback circuit that constitutes and the benchmark that has the high accuracy shunt regulator IC6 of temperature-compensating compare, thereby the conducting electric current of control IC 4B photoelectric isolating coupler, and then the input voltage of 8 pin of control pwm chip IC3, the response speed that resistance R 59, capacitor C 28, triode Q13, resistance R 35 are accelerated the output voltage variation.This input voltage feed forward circuit is by resistance R 29, R28, the bleeder circuit of the sampling input voltage that R27 and resistance R 10 are formed constitutes, with by power supply VCC2, resistance R 76, the reference voltage that resistance R 79 constitutes by operational amplifier IC2B amplification ratio after, through diode D9, resistance R 69, R24, capacitor C 12 is input to 6 pin of pwm chip IC3, when importing in the normal range (NR) of input voltage at 200-400VDC, voltage and input voltage to 6 pin of pwm chip IC3 are linear, when input voltage less than 200VDC, promptly import when under-voltage, the voltage that is input to 6 pin of pwm chip IC3 is clamped on the fixed voltage value.
Output overcurrent protective circuit 26 is the overcurrent set points that are no more than this module for the output current that guarantees the DC/DC module, in case overcurrent, this protective circuit is moved immediately, and making output current is the mistake flow valuve of this module.This output overcurrent protective circuit is made up of the two-stage current foldback circuit; the one-level current foldback circuit is transformed to voltage signal by the current signal of current transformer T3 sampling through resistance R 13; 2 pin through diode D21, resistance R 12, potentiometer W1, resistance R 11, resistance R 17, capacitor C 11 to pwm chip IC3; if the value that output current is set greater than W1; then cause overcurrent protection; thereby make output current can not surpass the overcurrent limit value, the protection power module.The secondary current foldback circuit is transformed to voltage signal by the current signal of current transformer T3 sampling through resistance R 13; behind diode D18; via resistance R 6 and resistance R 75; the reference voltage that resistance R 70 constitutes by operational amplifier IC1A amplification ratio after; be connected on 8 pin of pwm chip IC3 by diode D11; when output current big more; make that by operational amplifier IC1A the voltage of 8 pin of pwm chip IC3 is low more; the voltage of 8 pin of pwm chip IC3 is low more; duty ratio is more little; thereby make output voltage low more; protection power module power output is permanent power output, unlikely damage power module.
Output over-voltage protection circuit 27 is by resistance R 61; voltage-stabiliser tube D24; resistance R 62; triode Q17; resistance R 60; photoelectric isolating coupler IC5B forms; when output voltage surpasses about 7.2V; then triode conducting; feasible electric current by the photoelectric isolating coupler diode increases rapidly; by operating voltage VCC1; photoelectric isolating coupler IC5A; resistance R 33; resistance R 88; capacitor C 7; make the voltage on the capacitor C 7 raise; by resistance R 15; diode D22; make the voltage of 1 pin of pwm chip IC3 raise; cause the overvoltage crowbar action of pwm chip IC3 inside, output is turn-offed.Be used for when output voltage surpasses certain value this protective circuit and move immediately, make the DC/DC module stop output immediately.When output voltage does not surpass set point, assist the output voltage feedback circuit to realize the low load regulation of DC/DC module, rapidly the variation of responsive load.
Long-range machine open/close circuit 28 is used for can controlling the start and the shutdown of DC/DC module in the distance by external certain circuit.This long-range machine open/close circuit, by terminal ON/OFF, resistance R 68, capacitor C 43, triode Q23, resistance R 1, resistance R 2, resistance R 9, operational amplifier IC1B, resistance R 4, capacitor C 1, triode Q2, resistance R 8, resistance R 3 constitutes, when the voltage signal that adds at terminal ON/OFF greater than 4V, the output voltage of operational amplifier IC1B makes triode Q2 conducting, the collector voltage of triode Q2 is near 0V, make the anode of diode D19 be clamped at about 0.7V, thereby the voltage of delivering to the 6th pin of pwm chip IC3 is clamped at about 0.7V, makes not output of power module.When the voltage signal that meets 0V at terminal ON/OFF, module is normally exported.
Auxiliary power circuit 3 is used to the control circuit of DC/DC module that working power is provided.It is the dc voltage conversion of input in the 200VDC-400VDC scope+the isolated DC voltage of 15VDC, and as the operating voltage of control circuit.By capacitor C 20, diode D26, voltage-stabiliser tube D25, capacitor C 16, resistance R 25, capacitor C 17, resistance R 25, capacitor C 18, C19, integrated control chip IC7, diode D2, voltage-stabiliser tube D3, transformer T1, diode D4, filter capacitor C41, C44 constitute.Integrated control chip IC7 inside is integrated with power MOSFET and CMOS control circuit.Integrated control chip IC7 is a slice smart power chip, and inside is embedded with the very power MOSFET and the CMOS control circuit of high-breakdown-voltage, has overvoltage crowbar, current foldback circuit, restarts functions such as circuit automatically.
Power module auxiliary function circuit 4 is used to provide two kinds of auxiliary functions, a kind of function is the whether indication of operate as normal of DC/DC module, form by diode D7, D8, capacitor C 39, resistance R 46, R48, triode Q15, terminal MOK, triode Q15 is open collector output, when the module operate as normal, terminal MOK is a low level, and when module was not exported, terminal MOK was a high level.Another kind of function provides the indication of output current, can use for outside, is made up of resistance R 55, R52, capacitor C 38, terminal CS, and voltage and output current on the terminal CS are proportional.
The utility model line construction is succinct, the conversion efficiency height, and can reduce product cost relatively, well solved the cost performance problem of middle low power DC/DC power module.
Claims (6)
1, has the DC/DC power module of low-voltage regulation and load regulation, it is characterized in that, comprise Power Conversion major loop and control loop;
Described Power Conversion major loop comprises that the direct voltage to input carries out the direct-flow input circuit of smothing filtering, realizes that described input circuit, power conversion circuit, full-wave rectifying circuit and filter circuit are linked in sequence from power conversion circuit, full-wave rectifying circuit and the filter circuit of high voltage-small current to the conversion of low-voltage, high-current;
Described control loop comprises that one is used to control circuit for pulse-width modulation that the input voltage feed forward circuit of feedforward compensation is provided, one is used to control the pulse output of pulsewidth and the output voltage feedback circuit that rapid responsive load changes, one is used for providing the input under-voltage protecting circuit of clamping voltage when input is under-voltage, one is used to realize the control circuit of Power Conversion, one is used to provide the switch driving circuit of drive signal, one is used for the output overcurrent protective circuit of setting module output overcurrent value, one realizes the output over-voltage protection circuit of low load regulation according to the variation of output voltage, one is used to control the output voltage feedback circuit of the pulse output of pulse-width modulation with the responsive load variation, and the long-range machine open/close circuit of distant place control start and a shutdown;
Wherein:
Described input voltage feed forward circuit is connected with the dc supply input of Power Conversion major loop with the input of input under-voltage protecting circuit; The input of described control circuit for pulse-width modulation is connected with the output of long-range machine open/close circuit, output voltage feedback circuit, output overcurrent protective circuit and output over-voltage protection circuit respectively, and the output of this control circuit for pulse-width modulation is connected with the input of switch driving circuit; The output of described switch driving circuit is connected with the output of Power Conversion major loop; The input of described output voltage feedback circuit, output overcurrent protective circuit and output over-voltage protection circuit is connected with the output of Power Conversion major loop respectively.
2, the DC/DC power module with low-voltage regulation and load regulation according to claim 1 is characterized in that, also comprise an auxiliary power circuit, this auxiliary power circuit is used to control loop that power supply is provided.
3, the DC/DC power module with low-voltage regulation and load regulation according to claim 1 is characterized in that described control circuit for pulse-width modulation mainly is made of pulse width modulation controlled chip and peripheral circuit thereof.
4, the DC/DC power module with low-voltage regulation and load regulation according to claim 1 is characterized in that described switch driving circuit mainly is made of the control switch pipe.
5, the DC/DC power module with low-voltage regulation and load regulation according to claim 1 is characterized in that, described output overcurrent protective circuit mainly is made of operational amplifier and peripheral circuit thereof.
6, the DC/DC power module with low-voltage regulation and load regulation according to claim 1, it is characterized in that, power conversion circuit in the described power transforming main circuit is the zero voltage switch circuit, mainly by two power switchs, be connected two between the power switch electric capacity and the transformer that is connected with switch constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520044482 CN2822024Y (en) | 2005-08-24 | 2005-08-24 | DC/DC power module with low voltage regulation rate and negative regulation rate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200520044482 CN2822024Y (en) | 2005-08-24 | 2005-08-24 | DC/DC power module with low voltage regulation rate and negative regulation rate |
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| CN2822024Y true CN2822024Y (en) | 2006-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200520044482 Expired - Lifetime CN2822024Y (en) | 2005-08-24 | 2005-08-24 | DC/DC power module with low voltage regulation rate and negative regulation rate |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102437751A (en) * | 2011-12-21 | 2012-05-02 | 华为技术有限公司 | Power device with pre-bias voltage control function |
| CN102751778A (en) * | 2012-06-05 | 2012-10-24 | 奇瑞汽车股份有限公司 | Clamping plate type wireless power supply |
| CN103166464A (en) * | 2013-03-29 | 2013-06-19 | 株式会社村田制作所 | Power converter and power conversion method |
| CN101715265B (en) * | 2009-12-14 | 2013-08-14 | 海洋王照明科技股份有限公司 | LED driving power supply control circuit and LED lamp by using same |
| CN104768270A (en) * | 2014-01-02 | 2015-07-08 | 深圳市海洋王照明工程有限公司 | Synchronous shutdown LED boost driving circuit |
| CN111262501A (en) * | 2018-11-30 | 2020-06-09 | 厦门雅迅网络股份有限公司 | Overcurrent protection circuit of miniature direct current motor |
| CN116454079A (en) * | 2023-03-27 | 2023-07-18 | 天航长鹰(江苏)科技有限公司 | High-performance load point power supply |
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2005
- 2005-08-24 CN CN 200520044482 patent/CN2822024Y/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101715265B (en) * | 2009-12-14 | 2013-08-14 | 海洋王照明科技股份有限公司 | LED driving power supply control circuit and LED lamp by using same |
| CN102437751B (en) * | 2011-12-21 | 2016-01-20 | 华为技术有限公司 | There is the supply unit that pre-bias voltage controls |
| CN102437751A (en) * | 2011-12-21 | 2012-05-02 | 华为技术有限公司 | Power device with pre-bias voltage control function |
| CN102751778A (en) * | 2012-06-05 | 2012-10-24 | 奇瑞汽车股份有限公司 | Clamping plate type wireless power supply |
| CN102751778B (en) * | 2012-06-05 | 2015-03-25 | 奇瑞汽车股份有限公司 | Clamping plate type wireless power supply |
| CN103166464A (en) * | 2013-03-29 | 2013-06-19 | 株式会社村田制作所 | Power converter and power conversion method |
| CN103166464B (en) * | 2013-03-29 | 2016-09-07 | 株式会社村田制作所 | Power converter and method for power conversion |
| US9667161B2 (en) | 2013-03-29 | 2017-05-30 | Murata Manufacturing Co., Ltd. | Power converter and method for controlling power converter that adjust duty cycle of switching circuit based on input voltage |
| CN104768270A (en) * | 2014-01-02 | 2015-07-08 | 深圳市海洋王照明工程有限公司 | Synchronous shutdown LED boost driving circuit |
| CN104768270B (en) * | 2014-01-02 | 2019-04-12 | 深圳市海洋王照明工程有限公司 | Synchronous shutdown LED booster driving circuit |
| CN111262501A (en) * | 2018-11-30 | 2020-06-09 | 厦门雅迅网络股份有限公司 | Overcurrent protection circuit of miniature direct current motor |
| CN111262501B (en) * | 2018-11-30 | 2023-07-18 | 厦门雅迅网络股份有限公司 | Overcurrent protection circuit of miniature direct-current motor |
| CN116454079A (en) * | 2023-03-27 | 2023-07-18 | 天航长鹰(江苏)科技有限公司 | High-performance load point power supply |
| CN116454079B (en) * | 2023-03-27 | 2023-12-26 | 天航长鹰(江苏)科技有限公司 | High-performance load point power supply |
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