CN107911005A - A kind of Switching Power Supply suitable for pulse load matching small capacitances - Google Patents
A kind of Switching Power Supply suitable for pulse load matching small capacitances Download PDFInfo
- Publication number
- CN107911005A CN107911005A CN201711214785.2A CN201711214785A CN107911005A CN 107911005 A CN107911005 A CN 107911005A CN 201711214785 A CN201711214785 A CN 201711214785A CN 107911005 A CN107911005 A CN 107911005A
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- Prior art keywords
- circuit
- prime
- final stage
- output terminal
- input terminal
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Classifications
-
- 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
- H02M1/00—Details of apparatus for conversion
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/083—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the ignition at the zero crossing of the voltage or the current
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of Switching Power Supply suitable for pulse load matching small capacitances, belong to electronic circuit technology field, including input filter circuit, prime accumulator, final stage accumulator and pulse load；The output terminal of input filter circuit is connected with the input terminal of prime accumulator, and the input terminal of final stage accumulator is connected with the output terminal of prime accumulator, output terminal and pulse load connection.The present invention is using prime accumulator by the way of final stage accumulator is combined, difference and conventional single-stage accumulator, the present invention can use less storage capacitor to realize the shortcomings that energy of moment discharges, avoids single-stage accumulator, improve the reliability of Switching Power Supply.
Description
Technical field
The present invention relates to electronic circuit technology field, more particularly to a kind of switch electricity suitable for pulse load matching small capacitances
Source.
Background technology
The Switching Power Supply of pulse load matching small capacitances refers to that adapting to load current follows opening for cycle and change in duty cycle
Powered-down source, this kind of power supply, which generally requires, has wider instantaneous output, that is, requires maximum output high, and working
Area's interior power will not trigger output overcurrent and output over-voltage protection, especially be operated under the loading condition of burst pulse, export peak
It is larger to be worth electric current, drops that this index request is higher to output voltage top, does not allow 2% beyond output voltage.
It is required at present in many fields using the Switching Power Supply for meeting to adapt to pulse load, such as radar, the communications field
In, since under specific time conditions, the data volume of processing has change drastically, at sometime end when data volume is larger
When, common Switching Power Supply instantaneously extracts electric current, to meet by the storage capacitor of rear end parallel connection large capacity from storage capacitor
The requirement of transient high-current.It is disadvantageous in that the volume and cost that add Switching Power Supply, while the use of electrolytic capacitor
Service life is shorter, equal to the reliability for reducing Switching Power Supply.
The content of the invention
It is an object of the invention to provide a kind of Switching Power Supply suitable for pulse load matching small capacitances, to improve switch electricity
The reliability in source.
In order to achieve the above object, the technical solution adopted by the present invention is：Including input filter circuit, prime accumulator,
Final stage accumulator and pulse load；
The output terminal of input filter circuit is connected with the input terminal of prime accumulator, the input terminal of final stage accumulator with
Output terminal connection, output terminal and the pulse load of prime accumulator connect.
Wherein, the prime accumulator includes prime power conversion circuit, prime control circuit, prime energy storage electricity
Appearance, pre-driver circuitry, prime current sampling circuit, prime voltage sampling circuit and mlultiplying circuit；
The input terminal of prime power conversion circuit is connected with the output terminal of the input filter circuit, output terminal and prime store up
Can the connection of capacitance input terminal, the output terminal of prime the storage capacitor input terminal with prime current sampling circuit, preceding step voltage respectively
Sample circuit input terminal connection, prime current sampling circuit, prime voltage sampling circuit be multiplied by mlultiplying circuit after with before
Level control circuit connection；
The output terminal of prime control circuit is connected by pre-driver circuitry with the input terminal of prime power conversion circuit.
Wherein, the final stage accumulator includes final power translation circuit, final stage storage capacitor, final stage driving electricity
Road, final stage voltage sampling circuit, feedback circuit and final stage control circuit；
The input terminal of final power translation circuit is connected with the output terminal of the prime storage capacitor, the storage of output terminal and final stage
The input terminal connection of energy capacitance, the output terminal of final stage storage capacitor are connected with the pulse load and are adopted by final stage voltage
The input terminal of sample circuit and feedback circuit connects, and the output terminal of feedback circuit is connected with the input terminal of final stage control circuit；
The output terminal of final stage control circuit is connected by final driving circuit with the input terminal of final power translation circuit.
Wherein, the prime power conversion circuit topology is full-bridge phase shifting circuit, and the prime control circuit includes PWM cores
Piece.
Wherein, the final power translation circuit uses crisscross parallel BUCK circuit topological structures, the final stage control electricity
Road includes BUCK control chips.
Compared with prior art, there are following technique effect by the present invention：The present invention is stored up using prime accumulator and final stage
The mode that energy circuit is combined, difference and conventional single-stage accumulator, when single-stage accumulator provides energy for pulse load,
Outlet side needs high capacity capacitance for energy storage, could meet the energy release of moment, not only need large volume to install these capacitances, and
And frequent fast charging and discharging, also there is large effect to the service life of capacitance, so that the reliability of the power supply reduced, also improves
Production cost and maintenance cost.In contrast, the thinking that the present invention is combined with final stage accumulator using prime, can use compared with
Small storage capacitor realizes the shortcomings that energy of moment discharges, avoids single-stage accumulator, improves the reliable of Switching Power Supply
Property.
Brief description of the drawings
Below in conjunction with the accompanying drawings, the embodiment of the present invention is described in detail：
Fig. 1 is a kind of structure diagram of Switching Power Supply suitable for pulse load matching small capacitances in the present invention；
Fig. 2 is a kind of detailed construction schematic diagram of Switching Power Supply suitable for pulse load matching small capacitances in the present invention；
Fig. 3 is the structure diagram of preceding step voltage, current sampling circuit and control circuit in the present invention；
Fig. 4 is the structure diagram of final power translation circuit and final stage storage capacitor in the present invention.
Embodiment
In order to illustrate further the feature of the present invention, please refer to the following detailed descriptions related to the present invention and attached drawing.Institute
Attached drawing is only for reference and purposes of discussion, is not used for being any limitation as protection scope of the present invention.
As shown in Figure 1, present embodiment discloses a kind of Switching Power Supply suitable for pulse load matching small capacitances, including：It is defeated
Enter filter circuit 10, prime accumulator 20, final stage accumulator 30 and pulse load 40；The output of input filter circuit 10
End is connected with the input terminal of prime accumulator 20, the input terminal of final stage accumulator 30 and the output terminal of prime accumulator 20
Connection, output terminal and pulse load 40 connect.
It should be noted that the present embodiment using prime by the way of final stage accumulator 30 is combined, reach improve it is defeated
Go out peak power, reduce the purpose of output capacitance capacity.And large capacity storage capacitor is not required, output peak power is high, defeated
It is small to go out voltage top drop, it is small.
It should also be noted that, when Switching Power Supply load is pulse load 40, the capacity of output capacitance can be greatly decreased,
Output voltage top drop does not change at the same time, meets the higher occasion of Instantaneous peak power.
Further, as shown in Fig. 2, prime accumulator 20 includes prime power conversion circuit 21, prime control circuit
22nd, prime storage capacitor 23, pre-driver circuitry 24, prime current sampling circuit 25, prime voltage sampling circuit 26 and multiply
Method circuit 27；
The input terminal of prime power conversion circuit 21 is connected with the output terminal of the input filter circuit 10, output terminal is with before
The 23 input terminal connection of level storage capacitor, the output terminal input with prime current sampling circuit 25 respectively of prime storage capacitor 23
End, the input terminal connection of prime voltage sampling circuit 26, prime current sampling circuit 25, prime voltage sampling circuit 26 are by multiplying
Method circuit 27 is connected after being multiplied with prime control circuit 22；The output terminal of prime control circuit 22 by pre-driver circuitry 24 with
The input terminal connection of prime power conversion circuit 21.Wherein, prime power conversion circuit 21 using phase whole-bridging circuit topology and
Constant power mode is operated in, when load end Instantaneous peak power is larger, prime storage capacitor 23 can store required instantaneous
Energy, meets the needs of late-class circuit.
Specifically, as shown in figure 3, prime control circuit 22 and pre-driver circuitry 24, prime control circuit 22 are mainly located
Manage prime current sampling circuit 25, prime voltage sampling circuit 26, the signal transmitted by mlultiplying circuit 27, prime current sample
Circuit 25 is wherein made of differential sample amplifier, current operational amplifier, two input terminal of differential sample amplifier respectively with electricity
The connection of detection resistance R6, R7, R8 both ends is flowed, differential sample amplifier out is connected to current operational amplifier, and one of them is defeated
Enter end, current operational amplifier another input terminal access current reference signal, before current operational amplifier output terminal is connected to
Level control circuit 22 inputs；Voltage sampling circuit includes voltage error amplifier, one input terminal connection of voltage error amplifier
To between prime storage capacitor 23C6 and GND, voltage error amplifier another input terminal access voltage reference signal, voltage misses
Poor amplifier out is connected to prime control control circuit input.One input terminal of power multiplier is connected to differential sample and puts
Big device output terminal, another input terminal of power multiplier are connected between voltage error amplifier and storage capacitor C6 and GND, work(
One input terminal of the output terminal of rate multiplier and power operational amplifier is connected, power operational amplifier another input terminal access
Maximum power reference signal, power operational amplifier output terminal are connected to the input of prime control circuit 22, prime control circuit
The duty cycle of 22 signal control drive circuits exported according to power operational amplifier, when realizing light load, there is provided high voltage
Low current exports；In heavier loads, there is provided low-voltage, high-current exports.
Further, final stage accumulator 30 includes final power translation circuit 31, final stage storage capacitor 32, final stage driving
Circuit 33, final stage voltage sampling circuit 34, feedback circuit 35 and final stage control circuit 36；
The input terminal of final power translation circuit 31 is connected with the output terminal of the prime storage capacitor 23, output terminal with end
The input terminal connection of level storage capacitor 32, the output terminal of final stage storage capacitor 32 are connected and pass through with the pulse load 40
Final stage voltage sampling circuit 34 is connected with the input terminal of feedback circuit 35, output terminal and the final stage control circuit 36 of feedback circuit 35
Input terminal connection；The output terminal of final stage control circuit 36 is defeated by final driving circuit 33 and final power translation circuit 31
Enter end connection.Wherein, rear class power conversion circuit uses two-phase crisscross parallel pattern, and the energy moment that can convert prime passes
Load end is passed, this mode can not depend on the energy-storage function of large bulk capacitance, realize and improve load capacity.
Specifically, the electrical block diagram of final power translation circuit 31 and final stage storage capacitor 32 is as shown in figure 4, work as
When Switching Power Supply works, prime power conversion circuit 21 uses phase shifting full bridge soft switch technology, and wherein Q1~Q4 is that four masters open
Guan Guan, has an individual diodes inside each main switch, L2 is resonant inductance, and T1 is high frequency transformer, this converter is adopted
With phase shifting control, two power tubes of each bridge arm differ a phase into 180 ° of complementary conductings, the angle of flow of two bridge arms, i.e.,
Phase shifting angle, output voltage is adjusted by adjusting the size of phase shifting angle, and the size of phase shifting angle is the change with output in this programme
Change and change, Q2 and Q4 are leading-bridge, and Q1 and Q3 are lagging leg.The converter utilizes resonant inductance and the parasitism of power tube
Capacitance or extraneous capacitance realize the switch of no-voltage (ZVS), so as to improve the efficiency of power supply.
Since the scope of 20 output voltage of prime accumulator change is larger, according to formula：The square directly proportional of energy and voltage is drawn, so prime storage capacitor
23C6 capacity very littles, just can store enough energy, power is provided for final circuit.
Final stage converter uses two-phase crisscross parallel topological structure, can reduce current stress and switching tube fever and cause
Device lifetime, mainly by switching tube Q5 and Q6, diode CR7 and CR8 and energy storage inductor L3 and L4, storage capacitor C11~C12 and
C17~C20 is formed；Signal is passed to feedback circuit 35 by final stage voltage sampling circuit 34, is adjusted by final stage control circuit 36
The duty cycle of final driving circuit 33,33 synchronous control switch pipe Q5 and Q6 turn-on and turn-off of final driving circuit, energy storage inductor
L3 and L4 charges to final stage storage capacitor 32C11~C12 and C17~C20 and is supplied to backend pulse to load 40, diode CR7
Play the role of afterflow with CR8, so as to obtain stable output voltage.Since 40 required instantaneous energy of pulse load is by prime
Accumulator 20 provides, and rear class accumulator only needs quickly to transmit energy, thus final stage storage capacitor 32C11~C12 and
Large capacity energy storage is not required in C17~C20, has so reached Switching Power Supply instantaneous output height by two stage power transmission, full
Sufficient pulse load 40 or the faster application scenario of dynamic response.
It should be noted that constant power output, i.e. load current are realized using prime full-bridge phase shifting circuit in the present embodiment
Hour output voltage is high, and output voltage is low when load current is big, is matched with prime storage capacitor 23, passes through prime output voltage
Change turns to final stage storage power, and final stage realizes fast power transmission using two-phase crisscross parallel circuit, can both reduce power device
The stress of part, and stable power supply output can be obtained.
Further, in practical applications, prime current sampling circuit 25 samples respectively with prime voltage sampling circuit 26
Current signal and voltage signal, and signal is sent into mlultiplying circuit 27 and is handled, treated signal passes to prime control
Circuit 22, prime control circuit 22 are mainly made of PWM chip, and duty cycle adjusts therewith after receiving signal, and prime is driven
Dynamic 24 ON time of circuit can also change accordingly, and final prime power conversion circuit 21 is operated in constant power mode,
In the case that general power is not exceeded, voltage, electric current can be adapted to the larger application scenario of transient current in any combination.Prime work(
Rate translation circuit 21 is combined as final power conversion circuit with prime storage capacitor 23 and provides input source, and input source possesses wink at this time
When peak power it is higher the characteristics of, 23 capacity of prime storage capacitor need not be too big, the complete prime power conversion circuit 21 of power
There is provided, by but output voltage stabilization precision it is not high, can not also be rear end power supply for electrical equipment.
Here final power conversion circuit uses two-phase crisscross parallel topological structure, its feature, which is to export, to be had faster
Response speed, feedback circuit 35 will pass to final stage control circuit 36 after the processing of final stage voltage signal, and final stage control circuit 36 is led
To be made of BUCK control chips, the ON time of final driving circuit 33 can be controlled, so as to control final power conversion electricity
Road 31, realizes stable output, can be the output electricity that pulse load 40 provide stabilization with the collocation of final stage storage capacitor 32 use
Pressure.
It should also be noted that, Switching Power Supply disclosed in the present embodiment can be adapted for alternating current/direct current (AC/DC),
In all power supply products of DC/DC (DC/DC), direct current/alternating current DC/AC.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention.
Claims (5)
- A kind of 1. Switching Power Supply suitable for pulse load matching small capacitances, it is characterised in that：Stored up including input filter circuit, prime Can circuit, final stage accumulator and pulse load；The output terminal of input filter circuit is connected with the input terminal of prime accumulator, the input terminal and prime of final stage accumulator Output terminal connection, output terminal and the pulse load of accumulator connect.
- 2. as claimed in claim 1 suitable for the Switching Power Supply of pulse load matching small capacitances, it is characterised in that：Before described Level accumulator includes prime power conversion circuit, prime control circuit, prime storage capacitor, pre-driver circuitry, prime electricity Flow sample circuit, prime voltage sampling circuit and mlultiplying circuit；The input terminal of prime power conversion circuit is connected with the output terminal of the input filter circuit, output terminal and prime energy storage are electric Hold input terminal connection, the output terminal of prime the storage capacitor input terminal with prime current sampling circuit, prime voltage sample respectively Circuit input terminal connection, prime current sampling circuit, prime voltage sampling circuit be multiplied by mlultiplying circuit after with prime control Circuit connection processed；The output terminal of prime control circuit is connected by pre-driver circuitry with the input terminal of prime power conversion circuit.
- 3. as claimed in claim 2 suitable for the Switching Power Supply of pulse load matching small capacitances, it is characterised in that：The end Level accumulator includes final power translation circuit, final stage storage capacitor, final driving circuit, final stage voltage sampling circuit, anti- Current feed circuit and final stage control circuit；The input terminal of final power translation circuit is connected with the output terminal of the prime storage capacitor, output terminal and final stage energy storage are electric The input terminal connection of appearance, the output terminal of final stage storage capacitor are connected with the pulse load and by final stage voltage sample electricity The input terminal of road and feedback circuit connects, and the output terminal of feedback circuit is connected with the input terminal of final stage control circuit；The output terminal of final stage control circuit is connected by final driving circuit with the input terminal of final power translation circuit.
- 4. as claimed in claim 2 suitable for the Switching Power Supply of pulse load matching small capacitances, it is characterised in that：The prime Power conversion circuit topology is full-bridge phase shifting circuit, and the prime control circuit includes PWM chip.
- 5. as claimed in claim 3 suitable for the Switching Power Supply of pulse load matching small capacitances, it is characterised in that：The final stage Power conversion circuit uses crisscross parallel BUCK circuit topological structures, and the final stage control circuit includes BUCK control chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711214785.2A CN107911005A (en) | 2017-11-28 | 2017-11-28 | A kind of Switching Power Supply suitable for pulse load matching small capacitances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711214785.2A CN107911005A (en) | 2017-11-28 | 2017-11-28 | A kind of Switching Power Supply suitable for pulse load matching small capacitances |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107911005A true CN107911005A (en) | 2018-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711214785.2A Pending CN107911005A (en) | 2017-11-28 | 2017-11-28 | A kind of Switching Power Supply suitable for pulse load matching small capacitances |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6798177B1 (en) * | 2002-10-15 | 2004-09-28 | Arques Technology, Inc. | Boost-buck cascade converter for pulsating loads |
| JP2009257883A (en) * | 2008-04-15 | 2009-11-05 | Mitsubishi Electric Corp | Radar dc power supply unit |
| CN103658933A (en) * | 2013-12-18 | 2014-03-26 | 华南理工大学 | All-digital variable polarity multifunctional square-wave pulse welding source |
| CN103973153A (en) * | 2013-02-05 | 2014-08-06 | 新疆大学 | High-power numerical control pulse frequency modulation power supply of electric arc cutting machine tool |
| CN203911763U (en) * | 2014-06-11 | 2014-10-29 | 陕西科技大学 | Digital power supply suitable for CPU |
| CN104270030A (en) * | 2014-10-11 | 2015-01-07 | 孙卓 | Pulse power source capable of realizing short-circuit output |
| CN204442197U (en) * | 2015-03-19 | 2015-07-01 | 唐山标先电子有限公司 | A kind of pulsed sputter power supply |
| CN106602851A (en) * | 2017-01-11 | 2017-04-26 | 哈尔滨工业大学深圳研究生院 | Low frequency pulse current ripple inhibition circuit suitable for pulse load |
| CN206498326U (en) * | 2017-02-17 | 2017-09-15 | 西安科技大学 | A kind of pre- voltage stabilizing of use prime and the steady voltage regulator circuit of rear class low voltage difference |
| CN207652333U (en) * | 2017-11-28 | 2018-07-24 | 合肥华耀电子工业有限公司 | A kind of Switching Power Supply suitable for pulse load matching small capacitances |
-
2017
- 2017-11-28 CN CN201711214785.2A patent/CN107911005A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6798177B1 (en) * | 2002-10-15 | 2004-09-28 | Arques Technology, Inc. | Boost-buck cascade converter for pulsating loads |
| JP2009257883A (en) * | 2008-04-15 | 2009-11-05 | Mitsubishi Electric Corp | Radar dc power supply unit |
| CN103973153A (en) * | 2013-02-05 | 2014-08-06 | 新疆大学 | High-power numerical control pulse frequency modulation power supply of electric arc cutting machine tool |
| CN103658933A (en) * | 2013-12-18 | 2014-03-26 | 华南理工大学 | All-digital variable polarity multifunctional square-wave pulse welding source |
| CN203911763U (en) * | 2014-06-11 | 2014-10-29 | 陕西科技大学 | Digital power supply suitable for CPU |
| CN104270030A (en) * | 2014-10-11 | 2015-01-07 | 孙卓 | Pulse power source capable of realizing short-circuit output |
| CN204442197U (en) * | 2015-03-19 | 2015-07-01 | 唐山标先电子有限公司 | A kind of pulsed sputter power supply |
| CN106602851A (en) * | 2017-01-11 | 2017-04-26 | 哈尔滨工业大学深圳研究生院 | Low frequency pulse current ripple inhibition circuit suitable for pulse load |
| CN206498326U (en) * | 2017-02-17 | 2017-09-15 | 西安科技大学 | A kind of pre- voltage stabilizing of use prime and the steady voltage regulator circuit of rear class low voltage difference |
| CN207652333U (en) * | 2017-11-28 | 2018-07-24 | 合肥华耀电子工业有限公司 | A kind of Switching Power Supply suitable for pulse load matching small capacitances |
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