CN203872056U - Direct-current power supply controlled by constant power - Google Patents
Direct-current power supply controlled by constant power Download PDFInfo
- Publication number
- CN203872056U CN203872056U CN201420228552.3U CN201420228552U CN203872056U CN 203872056 U CN203872056 U CN 203872056U CN 201420228552 U CN201420228552 U CN 201420228552U CN 203872056 U CN203872056 U CN 203872056U
- Authority
- CN
- China
- Prior art keywords
- circuit
- output
- power supply
- input
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a direct-current power supply controlled by constant power. The direct-current power supply is mainly composed of a front-stage stabilized power supply, a BUCK circuit, a sampling circuit, a CPU control circuit, a PWM driving circuit, a protection circuit, a lower programming circuit and the like. The circuits adopt a double-closed-loop control mode, the current loop is used as an inner loop and acquires an output current signal, and the voltage loop is used as an outer loop and gives feedback on an output voltage signal. Moreover, a power control loop is added, namely, voltage and current multipliers are added, an error signal is generated by an operational amplifier, and all the signals are eventually transmitted to the CPU control circuit for processing. Voltage and current output in any combination can be realized at rated output power. The direct-current power supply is equivalent to the combination of a plurality of traditional power supplies.
Description
Technical field
The utility model relates to DC power supply field, specifically a kind of DC power supply of permanent power control.
Background technology
Wide region constant-power direct-current power supply refers to that output voltage and electric current all can regulate continuously in wider scope, and power supply can be operated in permanent power mode in service area, and load current hour output voltage is high, and when load current is large, output voltage is low.Developing in process of many electronic equipments, all needs various experiments and the general stabilized voltage power supply of testing use, and this class power supply generally all requires wider voltage-regulation scope and certain power output ability.For example, for research and development and the test of the low-voltage, high-current DC/DC module of using in the communications industry, need to provide the testing power supply of low voltage and larger electric current.
At present, the implementation method of wide region constant-power power source also has the mode that adopts linear power supply and linear power supply and Switching Power Supply combination.The features such as range of regulation is wide though traditional linear stabilized power supply has, good stability, control circuit are simple, the restriction of the factors such as modulated homogeneous tube power consumption, is difficult to accomplish large electric current wide-range voltage output.Output voltage can wide region be regulated, must use the mode of multi-gear switch or conversion transformer tap, cause that its volume is large, efficiency is on the low side.And the combined mode of linear power supply and Switching Power Supply, although ensured the precision of voltage stabilizing, has improved the efficiency of system to a certain extent, when output voltage changes in relative broad range, still can not ensure the high efficiency of system in full output voltage range.
utility model contentthe purpose of this utility model is to provide a kind of DC power supply of permanent power control, the problem existing to solve prior art.
In order to achieve the above object, the technical scheme that the utility model adopts is:
A kind of DC power supply of permanent power control, it is characterized in that: include prime stabilized power supply, the BUCK circuit of two-phase crisscross parallel topological structure, current sampling circuit, voltage sampling circuit, PWM drive circuit, cpu control circuit, lower programmed circuit, between described BUCK circuit access prime stabilized power supply two outputs, BUCK electric routing switch pipe Q1 and Q2, diode D1 and D2, energy storage inductor L1 and L2 form, wherein the drain electrode of switching tube Q1 is connected with first output of prime stabilized power supply, the source electrode of switching tube Q1 is connected to one end of energy storage inductor L1, the other end of energy storage inductor L1 is connected with a storage capacitor Co one end, second output of the storage capacitor Co other end and prime stabilized power supply is connected, storage capacitor Co two ends are also parallel with by resistance R
l, the series arm that current sense resistor Rs is in series, the negative electrode of described diode D1 is connected between the source electrode and energy storage inductor L1 of switching tube Q1, second output of the anode of diode D1 and prime stabilized power supply is connected, the drain electrode of described switching tube Q2 is connected with first output of prime stabilized power supply, the source electrode of switching tube Q2 is connected to one end of energy storage inductor L2, the other end of energy storage inductor L2 is connected between energy storage inductor L1 and storage capacitor Co, the negative electrode of described diode D2 is connected between the source electrode and energy storage inductor L2 of switching tube Q2, second output of the anode of diode D2 and prime stabilized power supply is connected, described current sampling circuit input is connected to current sense resistor Rs two ends, current sampling circuit output is connected to cpu control circuit input, described voltage sampling circuit input is connected to storage capacitor Co and resistance R
lbetween, voltage sampling circuit output is connected to cpu control circuit input, described cpu control circuit output is connected to respectively the input of PWM drive circuit, the input of lower programmed circuit, the output of described PWM drive circuit is connected to respectively the grid of switching tube Q1 in BUCK circuit, the grid of switching tube Q2, and described lower programmed circuit output is connected to respectively between storage capacitor Co and current sense resistor Rs, storage capacitor Co and resistance R
lbetween.
The DC power supply of described a kind of permanent power control, it is characterized in that: described current sampling circuit is made up of differential sample amplifier, current operator amplifier, differential sample amplifier two inputs are connected with current sense resistor Rs two ends respectively, differential sample amplifier out is connected to one of them input of current operator amplifier, another input access current reference signal of current operator amplifier, current operator amplifier out is connected to cpu control circuit input.
The DC power supply of described a kind of permanent power control, is characterized in that: described voltage sampling circuit comprises voltage error amplifier, and input of voltage error amplifier is connected to storage capacitor Co and resistance R
lbetween, another input access voltage reference signal of voltage error amplifier, voltage error amplifier output is connected to cpu control circuit input.
The DC power supply of described a kind of permanent power control, it is characterized in that: described lower programmed circuit comprises error amplifier, triode Q3, switching tube Q4, resistance R 1, cpu control circuit output is connected to one of them input of error amplifier, another input of error amplifier accesses given reference signal, error amplifier output is connected to the base stage of triode Q3, the grounded emitter of triode Q3, the collector electrode of triode Q3 is connected with the grid of switching tube Q4, the collector electrode of triode Q3 also accesses voltage VCC by resistance, the drain electrode of switching tube Q4 is connected between storage capacitor Co and current sense resistor Rs by resistance R 1, the source electrode of switching tube Q4 is connected to storage capacitor Co and resistance R
lbetween.
The DC power supply of described a kind of permanent power control, it is characterized in that: also comprise power multiplier, power operational amplifier, input of power multiplier is connected to differential sample amplifier out, and another input of power multiplier is connected to voltage error amplifier and storage capacitor Co, resistance R
lbetween the input that connects, input of the output of power multiplier and power operational amplifier is connected, another input of power operational amplifier accesses maximum power reference signal, power operational amplifier output is connected to the input of cpu control circuit.
The DC power supply of described a kind of permanent power control, is characterized in that: also comprise protective circuit, protective circuit is made up of overvoltage crowbar, current foldback circuit, overpower protection circuit, the input of protective circuit access cpu control circuit.
The utility model, in the time that load is lighter, can provide high voltage/little electric current output; In the time that load is heavier, can provide low pressure/High-current output.This power volume can be controlled in less space, and this power supply has dynamic responding speed faster.
The utility model adopts the two BUCK reduction voltage circuits of alternating expression topological structures in parallel and the design of CPU digital control technology, and increases lower programmed circuit and protective circuit is guaranteed power supply reliability.
The utlity model has following advantage:
1, output voltage, electric current can regulate continuously in relative broad range.
2, there is permanent power control output characteristic.
3, there is governing speed and flexibly control mode faster.
4, there is the defencive functions such as overvoltage, overcurrent, overpower.
Brief description of the drawings
Fig. 1 is wide region constant-power power source output characteristics figure.
Fig. 2 is the schematic block circuit diagram that the utility model is implemented.
Fig. 3 is BUCK circuit and the cpu control circuit principle schematic that the utility model is implemented.
Embodiment
As Fig. 2, shown in Fig. 3, a kind of DC power supply of permanent power control, include prime stabilized power supply, the BUCK circuit of two-phase crisscross parallel topological structure, current sampling circuit, voltage sampling circuit, PWM drive circuit, cpu control circuit, lower programmed circuit, between BUCK circuit access prime stabilized power supply two outputs, BUCK electric routing switch pipe Q1 and Q2, diode D1 and D2, energy storage inductor L1 and L2 form, wherein the drain electrode of switching tube Q1 is connected with first output of prime stabilized power supply, the source electrode of switching tube Q1 is connected to one end of energy storage inductor L1, the other end of energy storage inductor L1 is connected with a storage capacitor Co one end, second output of the storage capacitor Co other end and prime stabilized power supply is connected, storage capacitor Co two ends are also parallel with by resistance R
l, the series arm that current sense resistor Rs is in series, the negative electrode of diode D1 is connected between the source electrode and energy storage inductor L1 of switching tube Q1, second output of the anode of diode D1 and prime stabilized power supply is connected, the drain electrode of switching tube Q2 is connected with first output of prime stabilized power supply, the source electrode of switching tube Q2 is connected to one end of energy storage inductor L2, the other end of energy storage inductor L2 is connected between energy storage inductor L1 and storage capacitor Co, the negative electrode of diode D2 is connected between the source electrode and energy storage inductor L2 of switching tube Q2, second output of the anode of diode D2 and prime stabilized power supply is connected, current sampling circuit input is connected to current sense resistor Rs two ends, current sampling circuit output is connected to cpu control circuit input, voltage sampling circuit input is connected to storage capacitor Co and resistance R
lbetween, voltage sampling circuit output is connected to cpu control circuit input, cpu control circuit output is connected to respectively the input of PWM drive circuit, the input of lower programmed circuit, PWM drive circuit output is connected to respectively the grid of switching tube Q1 in BUCK circuit, the grid of switching tube Q2, and lower programmed circuit output is connected to respectively between storage capacitor Co and current sense resistor Rs, storage capacitor Co and resistance R
lbetween.
Current sampling circuit is made up of differential sample amplifier 1, current operator amplifier 2,1 liang of input of differential sample amplifier is connected with current sense resistor Rs two ends respectively, differential sample amplifier 1 output is connected to current operator amplifier 2 one of them input, current operator amplifier 2 another input access current reference signals, current operator amplifier 2 outputs are connected to cpu control circuit input.
Voltage sampling circuit comprises voltage error amplifier 3, and 3 one inputs of voltage error amplifier are connected to storage capacitor Co and resistance R
lbetween, voltage error amplifier 3 another input access voltage reference signals, voltage error amplifier 3 outputs are connected to cpu control circuit input.
Lower programmed circuit comprises error amplifier 6, triode Q3, switching tube Q4, resistance R 1, cpu control circuit output is connected to error amplifier 6 one of them input, error amplifier 6 another inputs access given reference signal, error amplifier 6 outputs are connected to the base stage of triode Q3, the grounded emitter of triode Q3, the collector electrode of triode Q3 is connected with the grid of switching tube Q4, the collector electrode of triode Q3 also accesses voltage VCC by resistance, the drain electrode of switching tube Q4 is connected between storage capacitor Co and current sense resistor Rs by resistance R 1, the source electrode of switching tube Q4 is connected to storage capacitor Co and resistance R
lbetween.
Also comprise power multiplier 5, power operational amplifier 4,5 one inputs of power multiplier are connected to differential sample amplifier 1 output, and power multiplier 5 another inputs are connected to voltage error amplifier 3 and storage capacitor Co, resistance R
lbetween connect input, 4 one inputs of the output of power multiplier 5 and power operational amplifier are connected, power operational amplifier 4 another input access maximum power reference signals, power operational amplifier 4 outputs are connected to the input of cpu control circuit.
Also comprise protective circuit, protective circuit is made up of overvoltage crowbar, current foldback circuit, overpower protection circuit, the input of protective circuit access cpu control circuit.
In the utility model, adopt digital control method, to the output of the signals collecting such as electric power output voltage, electric current reprocessing control BUCK converter, and increase lower programmed circuit raising output response speed.Realized power supply high precision wide range output, within the scope of rated output power, voltage, electric current can combination in any, have control mode flexibly.By changing circuit parameter, can be applied in the voltage of different brackets, the design of electric current wide region DC power supply.
In the utility model, adopt digital control method, thus the high accuracy of the guarantee real-time control of power supply and output voltage, electric current.Adopt voltage, current double closed-loop control technology, and increase power ring control output gross power, thereby guarantee voltage, current stabilization.Rear class BUCK circuit adopts two-phase crisscross parallel topological structure, increases power device Redundancy Design, guarantees power supply reliability service.Adopt lower programmed circuit, control power supply output rapid adjustment, realize dynamic response faster.On the basis of this power supply, by changing relevant parameter, can design the DC power supply of the continuously adjustable permanent power control of high precision wide range of different voltage, current class.
In order to realize the output of voltage gamut, prime stabilized power supply should be greater than rear class maximum output voltage, by PWM drive circuit control output duty cycle, realizes output voltage adjustable.PWM duty ratio can change in 0～100% scope, but considers switching tube conducting time-delay characteristics, must retain certain Dead Time.
In order to reduce the noise of prime stabilized power supply, in BUCK importation and connect a high frequency capacitance, filter away high frequency noise.
The utility model output current is larger, and in order to reduce reduction current stress and switching tube heating and to cause the impact reducing device lifetime, BUCK circuit adopts alternating expression topological structure in parallel.PWM drive circuit synchronous control switch pipe Q1 and Q2 turn-on and turn-off, energy storage inductor L1 and L2 charge and offer rear end output loading R to capacitor C o
l, diode D1 and D2 play afterflow effect.
The utlity model has and export faster response speed, in the time that CPU gives an order powered-down, give an order simultaneously and compare and control triode Q3 disconnection to error amplifier 6 and given benchmark.Thereby control switch pipe Q4 conducting, makes power supply draw fast electric current by switching tube Q4 and resistance R 1, and output voltage is pulled to 0V, thereby circuit output has response speed faster.
The utility model adopts high accurate A/D chip quick sampling voltage, current signal, and the inner integrated high accuracy DA of CPU, can arrange high resolution voltage, current value, thereby controls high accuracy output.
As shown in Figure 1, the utility model has the permanent power control of wide region output function, and in the situation that gross power does not exceed standard, voltage, electric current can combination in any.A power supply is like this equivalent to many conventional power source and is used in combination, thereby in research and development of products and test process, does not need frequently to change power supply, and has reduced the cost of power-supply device.
As shown in Figure 2, this is the schematic block circuit diagram that the utility model is implemented, and is mainly made up of prime stabilized power supply, BUCK circuit, sample circuit, cpu control circuit, PWM drive circuit, protective circuit and lower programmed circuit.Circuit adopts double circle controling mode, and electric current loop, as interior ring, gathers output current signal, and Voltage loop, as outer shroud, is fed back output voltage signal.And increase power control loop, and increase voltage, electric current multiplier and produce error signal through operational amplifier, all signals are finally given cpu control circuit processing.
As shown in Figure 3, this is the concrete implementing circuit figure of the utility model, and prime stabilized power supply provides input source for rear class BUCK circuit; Here BUCK circuit adopts two-phase crisscross parallel topological structure, is mainly made up of switching tube Q1 and Q2, diode D1 and D2 and energy storage inductor L1 and L2; Sample circuit in Fig. 2 comprises voltage, current signal sampling.Current sense resistor Rs adopts accurate copper-manganese resistance, and differential sample amplifier 1, to giving current operator amplifier 2 after current acquisition, obtains current error signal give CPU processing with current reference after comparing.After gathering voltage, voltage error amplifier 3 gives CPU processing after comparing with voltage reference.Voltage, the current signal gathering delivered to power operational amplifier 4 and compared with maximum power benchmark after power multiplier 5, and operation result is given CPU and processed; PWM drive circuit sends the turn-on and turn-off of Signal-controlled switch pipe Q1, Q2 according to CPU, thereby maintains the stable of output voltage, and energy storage inductor L1, L2 and storage capacitor Co provide load needed electric current; Protective circuit comprises the circuit such as overvoltage, overcurrent, overpower; Lower programmed circuit is equivalent to electronic load function, and it controls supply voltage output fast-descending to 0V.In the time that CPU gives an order powered-down, give an order simultaneously and compare and control triode Q3 disconnection to error amplifier 6 and given benchmark, thereby control switch pipe Q4 conducting, make power supply draw fast electric current by switching tube Q4 and resistance R 1, output voltage is pulled to 0V, thereby circuit output has response speed faster.
The power supply that has designed a 20V/50A on the utility model circuit base, its power output is 500W to the maximum.Power supply only has 1U height, is no more than in rated output power situation in gross power, and voltage, electric current can combination in any, are equivalent to several power supply.This power supply also can be operated in constant voltage or constant current mode, can arrange as required, in many research and development of products tests, has a wide range of applications.
Claims (6)
1. the DC power supply of a permanent power control, it is characterized in that: include prime stabilized power supply, the BUCK circuit of two-phase crisscross parallel topological structure, current sampling circuit, voltage sampling circuit, PWM drive circuit, cpu control circuit, lower programmed circuit, between described BUCK circuit access prime stabilized power supply two outputs, BUCK electric routing switch pipe Q1 and Q2, diode D1 and D2, energy storage inductor L1 and L2 form, wherein the drain electrode of switching tube Q1 is connected with first output of prime stabilized power supply, the source electrode of switching tube Q1 is connected to one end of energy storage inductor L1, the other end of energy storage inductor L1 is connected with a storage capacitor Co one end, second output of the storage capacitor Co other end and prime stabilized power supply is connected, storage capacitor Co two ends are also parallel with by resistance R
l, the series arm that current sense resistor Rs is in series, the negative electrode of described diode D1 is connected between the source electrode and energy storage inductor L1 of switching tube Q1, second output of the anode of diode D1 and prime stabilized power supply is connected, the drain electrode of described switching tube Q2 is connected with first output of prime stabilized power supply, the source electrode of switching tube Q2 is connected to one end of energy storage inductor L2, the other end of energy storage inductor L2 is connected between energy storage inductor L1 and storage capacitor Co, the negative electrode of described diode D2 is connected between the source electrode and energy storage inductor L2 of switching tube Q2, second output of the anode of diode D2 and prime stabilized power supply is connected, described current sampling circuit input is connected to current sense resistor Rs two ends, current sampling circuit output is connected to cpu control circuit input, described voltage sampling circuit input is connected to storage capacitor Co and resistance R
lbetween, voltage sampling circuit output is connected to cpu control circuit input, described cpu control circuit output is connected to respectively the input of PWM drive circuit, the input of lower programmed circuit, the output of described PWM drive circuit is connected to respectively the grid of switching tube Q1 in BUCK circuit, the grid of switching tube Q2, and described lower programmed circuit output is connected to respectively between storage capacitor Co and current sense resistor Rs, storage capacitor Co and resistance R
lbetween.
2. the DC power supply of a kind of permanent power control according to claim 1, it is characterized in that: described current sampling circuit is made up of differential sample amplifier, current operator amplifier, differential sample amplifier two inputs are connected with current sense resistor Rs two ends respectively, differential sample amplifier out is connected to one of them input of current operator amplifier, another input access current reference signal of current operator amplifier, current operator amplifier out is connected to cpu control circuit input.
3. the DC power supply of a kind of permanent power control according to claim 1, is characterized in that: described voltage sampling circuit comprises voltage error amplifier, and input of voltage error amplifier is connected to storage capacitor Co and resistance R
lbetween, another input access voltage reference signal of voltage error amplifier, voltage error amplifier output is connected to cpu control circuit input.
4. the DC power supply of a kind of permanent power control according to claim 1, it is characterized in that: described lower programmed circuit comprises error amplifier, triode Q3, switching tube Q4, resistance R 1, cpu control circuit output is connected to one of them input of error amplifier, another input of error amplifier accesses given reference signal, error amplifier output is connected to the base stage of triode Q3, the grounded emitter of triode Q3, the collector electrode of triode Q3 is connected with the grid of switching tube Q4, the collector electrode of triode Q3 also accesses voltage VCC by resistance, the drain electrode of switching tube Q4 is connected between storage capacitor Co and current sense resistor Rs by resistance R 1, the source electrode of switching tube Q4 is connected to storage capacitor Co and resistance R
lbetween.
5. according to the DC power supply of a kind of permanent power control described in claim 1 or 2 or 3, it is characterized in that: also comprise power multiplier, power operational amplifier, input of power multiplier is connected to differential sample amplifier out, and another input of power multiplier is connected to voltage error amplifier and storage capacitor Co, resistance R
lbetween the input that connects, input of the output of power multiplier and power operational amplifier is connected, another input of power operational amplifier accesses maximum power reference signal, power operational amplifier output is connected to the input of cpu control circuit.
6. the DC power supply of a kind of permanent power control according to claim 1; it is characterized in that: also comprise protective circuit; protective circuit is made up of overvoltage crowbar, current foldback circuit, overpower protection circuit, the input of protective circuit access cpu control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420228552.3U CN203872056U (en) | 2014-05-06 | 2014-05-06 | Direct-current power supply controlled by constant power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420228552.3U CN203872056U (en) | 2014-05-06 | 2014-05-06 | Direct-current power supply controlled by constant power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203872056U true CN203872056U (en) | 2014-10-08 |
Family
ID=51652975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420228552.3U Expired - Fee Related CN203872056U (en) | 2014-05-06 | 2014-05-06 | Direct-current power supply controlled by constant power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203872056U (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103973114A (en) * | 2014-05-06 | 2014-08-06 | 中国电子科技集团公司第四十一研究所 | Constant power control direct-current power supply |
| CN104980022A (en) * | 2015-06-18 | 2015-10-14 | 奇瑞汽车股份有限公司 | DC to DC system |
| CN105024568A (en) * | 2015-08-05 | 2015-11-04 | 宁波赛耐比光电科技股份有限公司 | Frequency conversion and constant current BUCK circuit |
| CN106549556A (en) * | 2016-12-21 | 2017-03-29 | 南京矽力杰半导体技术有限公司 | Multichannel input power and integrated circuit |
| CN107478947A (en) * | 2017-08-16 | 2017-12-15 | 艾德克斯电子（南京）有限公司 | A kind of SENSE is anti-reverse or the method missed |
| CN108306509A (en) * | 2018-03-20 | 2018-07-20 | 广州京善电子有限公司 | Current-control type BUCK devices |
| CN109413791A (en) * | 2017-08-18 | 2019-03-01 | 明纬(广州)电子有限公司 | Feedback circuit |
| CN110554726A (en) * | 2018-06-04 | 2019-12-10 | 群光电能科技股份有限公司 | Constant power protection circuit and constant power protection method |
| CN112953209A (en) * | 2021-02-05 | 2021-06-11 | 联合汽车电子有限公司 | Power supply structure, DCDC converter and vehicle |
| CN113659804A (en) * | 2021-08-13 | 2021-11-16 | 上海空间电源研究所 | System for restraining high-low temperature constant current point drift amount for aerospace |
| WO2021248333A1 (en) * | 2020-06-09 | 2021-12-16 | 华为数字能源技术有限公司 | Buck circuit, buck apparatus and circuit control method |
-
2014
- 2014-05-06 CN CN201420228552.3U patent/CN203872056U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103973114A (en) * | 2014-05-06 | 2014-08-06 | 中国电子科技集团公司第四十一研究所 | Constant power control direct-current power supply |
| CN104980022A (en) * | 2015-06-18 | 2015-10-14 | 奇瑞汽车股份有限公司 | DC to DC system |
| CN105024568A (en) * | 2015-08-05 | 2015-11-04 | 宁波赛耐比光电科技股份有限公司 | Frequency conversion and constant current BUCK circuit |
| CN106549556B (en) * | 2016-12-21 | 2019-02-26 | 南京矽力杰半导体技术有限公司 | Multichannel input power and integrated circuit |
| CN106549556A (en) * | 2016-12-21 | 2017-03-29 | 南京矽力杰半导体技术有限公司 | Multichannel input power and integrated circuit |
| CN107478947A (en) * | 2017-08-16 | 2017-12-15 | 艾德克斯电子（南京）有限公司 | A kind of SENSE is anti-reverse or the method missed |
| CN109413791A (en) * | 2017-08-18 | 2019-03-01 | 明纬(广州)电子有限公司 | Feedback circuit |
| CN109413791B (en) * | 2017-08-18 | 2020-11-24 | 明纬(广州)电子有限公司 | Feedback circuit |
| CN108306509A (en) * | 2018-03-20 | 2018-07-20 | 广州京善电子有限公司 | Current-control type BUCK devices |
| CN110554726A (en) * | 2018-06-04 | 2019-12-10 | 群光电能科技股份有限公司 | Constant power protection circuit and constant power protection method |
| CN110554726B (en) * | 2018-06-04 | 2020-10-20 | 群光电能科技股份有限公司 | Constant power protection circuit and constant power protection method |
| WO2021248333A1 (en) * | 2020-06-09 | 2021-12-16 | 华为数字能源技术有限公司 | Buck circuit, buck apparatus and circuit control method |
| CN112953209A (en) * | 2021-02-05 | 2021-06-11 | 联合汽车电子有限公司 | Power supply structure, DCDC converter and vehicle |
| CN113659804A (en) * | 2021-08-13 | 2021-11-16 | 上海空间电源研究所 | System for restraining high-low temperature constant current point drift amount for aerospace |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203872056U (en) | Direct-current power supply controlled by constant power | |
| CN103973114A (en) | Constant power control direct-current power supply | |
| CN103346662B (en) | Control circuit, switch converter and control method thereof | |
| CN103916004A (en) | Power factor correction circuit and control method thereof | |
| CN103929048B (en) | A kind of zero cross detection circuit of Switching Power Supply | |
| CN203775025U (en) | Power factor correction circuit and control circuit thereof | |
| CN104297553A (en) | Output voltage detection circuit, control circuit and switch-type converter | |
| CN105099188A (en) | Dc-dc converter | |
| CN104300773A (en) | Simple self-adaptation dummy-load circuit | |
| CN104184319A (en) | Charge pump circuit as well as control circuit and control method thereof | |
| CN103701321A (en) | Synchronous rectification DC-DC (Direct Current) converter with rapid transient response buck | |
| CN102969915A (en) | High-power-factor constant current control circuit | |
| Zhang et al. | A new three-phase ac-ac Z-source converter | |
| CN103472283B (en) | Voltage detection method and circuit and the Switching Power Supply with this voltage detecting circuit | |
| CN109768703A (en) | A kind of frequency conversion Average Current Control device and method based on output voltage feedback | |
| CN104065265A (en) | All-digital control photovoltaic module simulator and control method thereof | |
| CN106300964B (en) | Independent charge and discharge sequential single-inductance double-output switch converters method for controlling frequency conversion and its device | |
| CN102299615A (en) | Circuit and method for adaptively adjusting fixed conducting time | |
| CN203618197U (en) | LED drive circuit of non-isolated solid zone PFC and controller thereof | |
| CN204578355U (en) | A kind of quadratic form Buck power factor correcting converter | |
| CN204244075U (en) | With the power conversion system of frequency compensation device | |
| CN103630128A (en) | Circuit of single transformer for realizing luminance building-up and maintaining functions of laser gyroscope high-voltage power supply | |
| CN100394343C (en) | Parameter type switch voltage-stablized power supply and its control circuit | |
| CN102843021A (en) | Peak suppression circuit and multiphase booster circuit with same | |
| CN102611296B (en) | Switch switching-off triggering circuit and power factor correction circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 Termination date: 20170506 |