CN204928580U - Switching power supply controls drive circuit - Google Patents
Switching power supply controls drive circuit Download PDFInfo
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- CN204928580U CN204928580U CN201520229083.1U CN201520229083U CN204928580U CN 204928580 U CN204928580 U CN 204928580U CN 201520229083 U CN201520229083 U CN 201520229083U CN 204928580 U CN204928580 U CN 204928580U
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Abstract
The utility model discloses a switching power supply controls drive circuit, including monopole EMI filter circuit, a rectifying filter circuit, output filter circuit, voltage anticipatory control circuit and opto -coupler feedback control circuit, monopole EMI filter circuit includes inductance L2 and electric capacity C9, rectification filter circuit includes rectifier bridge Q and electric capacity C1, output filter circuit includes inductance L6 and electric capacity C8, voltage anticipatory control circuit includes chip U1, resistance R1 and resistance R2, opto -coupler feedback control circuit includes optoelectronic coupler U2 and controllable accurate steady voltage source U3. The utility model discloses utilize TOP244Y as the controller, use feedback control method and designed a switching power supply controls drive circuit, the utility model discloses the steady voltage performance is good, and the peripheral cell is few, characteristics with low costs, and the power is efficient, the low power dissipation, and overload capacity is strong, and the interference killing feature is strong, has better development prospect in present power field.
Description
Technical field
The utility model relates to a kind of control drive circuit, and specifically a kind of Switching Power Supply controls drive circuit.
Background technology
Switching Power Supply is described as energy-efficient power supply, and be the more satisfactory product under modern promotion environmental protection, it represents the developing direction of stabilized voltage power supply, has now become the main product of stabilized voltage power supply.The inner key components of Switching Power Supply is operated in HF switch state, and consumed energy own is very low, and power-efficient can reach 70% ~ 90%, improves nearly one times than normal linear stabilized voltage power supply.Switching Power Supply is also known as the power supply of no industrial frequency transformer, it be utilize the very little high frequency transformer of volume to realize voltage transformation and electrical network isolation, heavy Industrial Frequency Transformer can not only be removed, also can adopt filter element and the radiator of small volume, little, the lightweight Switching Power Supply of research and development high efficiency, high density, high reliability, volume becomes the direction of people's research.
Utility model content
The purpose of this utility model is to provide the Switching Power Supply that a kind of circuit is simple, voltage regulation performance good, peripheral cell, cost are low to control drive circuit, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of Switching Power Supply controls drive circuit, comprise one pole EMI filter circuit, current rectifying and wave filtering circuit, output filter circuit, voltage feedforward control circuit and opto-coupled feedback control circuit, described one pole EMI filter circuit comprises inductance L 2 and electric capacity C9, described current rectifying and wave filtering circuit comprises rectifier bridge Q and electric capacity C1, described output filter circuit comprises inductance L 6 and electric capacity C8, described voltage feedforward control circuit comprises chip U1, resistance R1 and resistance R2, and described opto-coupled feedback control circuit comprises photoelectrical coupler U2 and controllable accurate source of stable pressure U3; Rectifier bridge Q comprises diode D1, diode D2, diode D3 and diode D4, diode D1 cathode connecting diode D4 negative pole, diode D4 negative pole connects diode D3 positive pole, diode D3 negative pole connects diode D2 positive pole, diode D2 negative pole connects diode D1 negative pole, and diode D4 negative pole end is rectifier bridge Q pin 1, diode D1 negative pole end is rectifier bridge Q pin 2, diode D3 negative pole end is rectifier bridge Q pin 3, diode D3 positive terminal is rectifier bridge Q pin 4;
Described rectifier bridge Q pin 1 connects inductance L 1, inductance L 1 other end connects electric capacity C9 and fuse FU respectively, the fuse FU other end connects 220V alternating current, the 220V alternating current other end connects the electric capacity C9 other end and inductance L 2 respectively, inductance L 2 other end connects rectifier bridge Q pin 3, rectifier bridge Q pin 4 and connects electric capacity C1 respectively, resistance R2, electric capacity C2, diode VD5, resistance R1, electric capacity C10 and transformer T coil L3, rectifier bridge Q pin 2 connects the electric capacity C1 other end respectively, resistance R4, chip U1 pin 4, chip U1 pin 5, electric capacity C4, electric capacity C5, electric capacity C3 and transformer T coil L5, described chip U1 pin 3 is the contact resistance R2 other end and the resistance R4 other end respectively, chip U1 pin 6 is the connection transformer T coil L3 other end and diode VD1 positive pole respectively, diode VD1 negative pole is contact resistance R3 and diode VD5 negative pole respectively, the resistance R3 other end connects the electric capacity C2 other end, the described chip U1 pin 2 contact resistance R1 other end, chip U1 pin 1 connects the electric capacity C4 other end respectively, resistance R5 and photoelectrical coupler U2 pin 2, the resistance R5 other end connects the electric capacity C5 other end, described photoelectrical coupler U2 pin 1 connects the electric capacity C3 other end and diode VD2 negative pole respectively, the diode VD2 positive pole connection transformer T coil L5 other end, described photoelectrical coupler U2 pin 3 is contact resistance R7 respectively, inductance L 6, electric capacity C6, electric capacity C7, diode VD3 negative pole and resistance R11, the resistance R11 other end connects electric capacity C12, and the electric capacity C12 other end connects diode VD3 negative pole and transformer T coil L4 respectively, and the transformer T coil L4 other end connects the electric capacity C10 other end respectively, the electric capacity C6 other end, the electric capacity C7 other end, electric capacity C8, output B, resistance R10, the A pole of controllable accurate source of stable pressure U3 and electric capacity C11, described inductance L 6 other end connects output terminals A respectively, the electric capacity C8 other end and resistance R9, the resistance R9 other end is the contact resistance R10 other end respectively, the R pole of controllable accurate source of stable pressure U3 and resistance R8, the resistance R8 other end connects electric capacity C11, the electric capacity C11 other end connects K pole and the resistance R6 of control precision voltage regulator U3 respectively, the resistance R6 other end connects diode VD4 positive pole and photoelectrical coupler U2 pin 4 respectively, diode VD4 negative pole connects the electric capacity C11 other end and the resistance R7 other end respectively, described chip U1 model is TOP244Y, and described photoelectrical coupler U2 model is PC817C, and described controllable accurate source of stable pressure U3 model is TL431.
As the utility model further scheme: described diode VD5 is Transient Suppression Diode, model is P6KE200.
Compared with prior art, the beneficial effects of the utility model are: the utility model utilizes TOP244Y as controller, application feedback devises a kind of Switching Power Supply and controls drive circuit, and the utility model voltage regulation performance is good, and peripheral cell is few, the feature that cost is low, and power-efficient is high, low in energy consumption, overload capacity is strong, antijamming capability is strong, has good development prospect in present field of power supplies.
Accompanying drawing explanation
Fig. 1 is the circuit diagram that Switching Power Supply controls drive circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of Switching Power Supply controls drive circuit, comprise one pole EMI filter circuit, current rectifying and wave filtering circuit, output filter circuit, voltage feedforward control circuit and opto-coupled feedback control circuit, described one pole EMI filter circuit comprises inductance L 2 and electric capacity C9, described current rectifying and wave filtering circuit comprises rectifier bridge Q and electric capacity C1, described output filter circuit comprises inductance L 6 and electric capacity C8, described voltage feedforward control circuit comprises chip U1, resistance R1 and resistance R2, described opto-coupled feedback control circuit comprises photoelectrical coupler U2 and controllable accurate source of stable pressure U3, rectifier bridge Q comprises diode D1, diode D2, diode D3 and diode D4, diode D1 cathode connecting diode D4 negative pole, diode D4 negative pole connects diode D3 positive pole, diode D3 negative pole connects diode D2 positive pole, diode D2 negative pole connects diode D1 negative pole, and diode D4 negative pole end is rectifier bridge Q pin 1, diode D1 negative pole end is rectifier bridge Q pin 2, diode D3 negative pole end is rectifier bridge Q pin 3, diode D3 positive terminal is rectifier bridge Q pin 4,
Described rectifier bridge Q pin 1 connects inductance L 1, inductance L 1 other end connects electric capacity C9 and fuse FU respectively, the fuse FU other end connects 220V alternating current, the 220V alternating current other end connects the electric capacity C9 other end and inductance L 2 respectively, inductance L 2 other end connects rectifier bridge Q pin 3, rectifier bridge Q pin 4 and connects electric capacity C1 respectively, resistance R2, electric capacity C2, diode VD5, resistance R1, electric capacity C10 and transformer T coil L3, rectifier bridge Q pin 2 connects the electric capacity C1 other end respectively, resistance R4, chip U1 pin 4, chip U1 pin 5, electric capacity C4, electric capacity C5, electric capacity C3 and transformer T coil L5, described chip U1 pin 3 is the contact resistance R2 other end and the resistance R4 other end respectively, chip U1 pin 6 is the connection transformer T coil L3 other end and diode VD1 positive pole respectively, diode VD1 negative pole is contact resistance R3 and diode VD5 negative pole respectively, the resistance R3 other end connects the electric capacity C2 other end, the described chip U1 pin 2 contact resistance R1 other end, chip U1 pin 1 connects the electric capacity C4 other end respectively, resistance R5 and photoelectrical coupler U2 pin 2, the resistance R5 other end connects the electric capacity C5 other end, described photoelectrical coupler U2 pin 1 connects the electric capacity C3 other end and diode VD2 negative pole respectively, the diode VD2 positive pole connection transformer T coil L5 other end, described photoelectrical coupler U2 pin 3 is contact resistance R7 respectively, inductance L 6, electric capacity C6, electric capacity C7, diode VD3 negative pole and resistance R11, the resistance R11 other end connects electric capacity C12, and the electric capacity C12 other end connects diode VD3 negative pole and transformer T coil L4 respectively, and the transformer T coil L4 other end connects the electric capacity C10 other end respectively, the electric capacity C6 other end, the electric capacity C7 other end, electric capacity C8, output B, resistance R10, the A pole of controllable accurate source of stable pressure U3 and electric capacity C11, described inductance L 6 other end connects output terminals A respectively, the electric capacity C8 other end and resistance R9, the resistance R9 other end is the contact resistance R10 other end respectively, the R pole of controllable accurate source of stable pressure U3 and resistance R8, the resistance R8 other end connects electric capacity C11, the electric capacity C11 other end connects K pole and the resistance R6 of control precision voltage regulator U3 respectively, the resistance R6 other end connects diode VD4 positive pole and photoelectrical coupler U2 pin 4 respectively, diode VD4 negative pole connects the electric capacity C11 other end and the resistance R7 other end respectively, described chip U1 model is TOP244Y, and described photoelectrical coupler U2 model is PC817C, and described controllable accurate source of stable pressure U3 model is TL431.
Diode VD5 is Transient Suppression Diode, and model is P6KE200.
Operation principle of the present utility model: first 220V mains supply transfers high voltage direct current to through rectification and filtering, then high-frequency action of low-voltage pulse is transferred to by switching circuit and high frequency switch transformer, again through over commutation and filter circuit, the DC power supply of final output LOW voltage.There is a circuit by opto-coupled feedback electronic feedback to control circuit, by control PWM duty ratio to reach output voltage stabilization at output simultaneously.
Electric voltage feed forward circuit is before rectifier power source to transformer T coil L3; control chip TOP244Y is by analyzing the quality of rectification; preliminary control is carried out to system; chip TOP244Y outside has programmable limiting current and input voltage is under-voltage, overvoltage measuring ability; because its under-voltage protection operating voltage is 100V; overvoltage protection operating voltage is 450V; namely the DC voltage range of chip TOP244Y in this circuit is 100 ~ 450V; once beyond this voltage range, TOP244Y will close automatically.When input voltage raises, utilize resistance R2 can limit the peak power output of power supply.By the method reducing limiting current, allow high frequency transformer less for volume design to work in a continuous mode, thus reduce the peak current of primary and secondary, the withstand voltage of power consumption and elementary components and parts can be reduced like this.
Opto-coupled feedback is topmost feedback form in the utility model, is the important devices determining the utility model lasting accuracy.Optical coupler feedback circuit comprises chip U1 and controllable accurate source of stable pressure U3, refer to Fig. 1, when there is fluctuation in output voltage U0, warp, the sampling voltage obtained after dividing potential drop just compares with the 2.5V bandgap voltage reference in TL431, TL431 K extremely on form error voltage, the operating current IF of the light-emitting diode in TL431 is made to produce respective change, the size changing control end electric current I C is gone again by photoelectrical coupler U2, regulate the output duty cycle of chip U1, make U0 constant, thus reach voltage stabilizing object.Electric capacity C10 and resistance R8 is frequency compensation network, and resistance R6 is used for setting the DC current gain of loop.Form external error amplifier with TL431, the stability of output voltage can be improved.The bias current of TL431 is only 1mA, and this contributes to reducing no-load loss.Forming soft starting circuit by diode VD4 and electric capacity C11, avoiding overload phenomenon occurs when starting power supply.When power cut-off, the electric charge on electric capacity C11 is released by resistance R7.
Claims (2)
1. a Switching Power Supply controls drive circuit, comprise one pole EMI filter circuit, current rectifying and wave filtering circuit, output filter circuit, voltage feedforward control circuit and opto-coupled feedback control circuit, it is characterized in that, described one pole EMI filter circuit comprises inductance L 2 and electric capacity C9, described current rectifying and wave filtering circuit comprises rectifier bridge Q and electric capacity C1, described output filter circuit comprises inductance L 6 and electric capacity C8, described voltage feedforward control circuit comprises chip U1, resistance R1 and resistance R2, and described opto-coupled feedback control circuit comprises photoelectrical coupler U2 and controllable accurate source of stable pressure U3; Rectifier bridge Q comprises diode D1, diode D2, diode D3 and diode D4, diode D1 cathode connecting diode D4 negative pole, diode D4 negative pole connects diode D3 positive pole, diode D3 negative pole connects diode D2 positive pole, diode D2 negative pole connects diode D1 negative pole, and diode D4 negative pole end is rectifier bridge Q pin 1, diode D1 negative pole end is rectifier bridge Q pin 2, diode D3 negative pole end is rectifier bridge Q pin 3, diode D3 positive terminal is rectifier bridge Q pin 4;
Described rectifier bridge Q pin 1 connects inductance L 1, inductance L 1 other end connects electric capacity C9 and fuse FU respectively, the fuse FU other end connects 220V alternating current, the 220V alternating current other end connects the electric capacity C9 other end and inductance L 2 respectively, inductance L 2 other end connects rectifier bridge Q pin 3, rectifier bridge Q pin 4 and connects electric capacity C1 respectively, resistance R2, electric capacity C2, diode VD5, resistance R1, electric capacity C10 and transformer T coil L3, rectifier bridge Q pin 2 connects the electric capacity C1 other end respectively, resistance R4, chip U1 pin 4, chip U1 pin 5, electric capacity C4, electric capacity C5, electric capacity C3 and transformer T coil L5, described chip U1 pin 3 is the contact resistance R2 other end and the resistance R4 other end respectively, chip U1 pin 6 is the connection transformer T coil L3 other end and diode VD1 positive pole respectively, diode VD1 negative pole is contact resistance R3 and diode VD5 negative pole respectively, the resistance R3 other end connects the electric capacity C2 other end, the described chip U1 pin 2 contact resistance R1 other end, chip U1 pin 1 connects the electric capacity C4 other end respectively, resistance R5 and photoelectrical coupler U2 pin 2, the resistance R5 other end connects the electric capacity C5 other end, described photoelectrical coupler U2 pin 1 connects the electric capacity C3 other end and diode VD2 negative pole respectively, the diode VD2 positive pole connection transformer T coil L5 other end, described photoelectrical coupler U2 pin 3 is contact resistance R7 respectively, inductance L 6, electric capacity C6, electric capacity C7, diode VD3 negative pole and resistance R11, the resistance R11 other end connects electric capacity C12, and the electric capacity C12 other end connects diode VD3 negative pole and transformer T coil L4 respectively, and the transformer T coil L4 other end connects the electric capacity C10 other end respectively, the electric capacity C6 other end, the electric capacity C7 other end, electric capacity C8, output B, resistance R10, the A pole of controllable accurate source of stable pressure U3 and electric capacity C11, described inductance L 6 other end connects output terminals A respectively, the electric capacity C8 other end and resistance R9, the resistance R9 other end is the contact resistance R10 other end respectively, the R pole of controllable accurate source of stable pressure U3 and resistance R8, the resistance R8 other end connects electric capacity C11, the electric capacity C11 other end connects K pole and the resistance R6 of control precision voltage regulator U3 respectively, the resistance R6 other end connects diode VD4 positive pole and photoelectrical coupler U2 pin 4 respectively, diode VD4 negative pole connects the electric capacity C11 other end and the resistance R7 other end respectively, described chip U1 model is TOP244Y, and described photoelectrical coupler U2 model is PC817C, and described controllable accurate source of stable pressure U3 model is TL431.
2. Switching Power Supply according to claim 1 controls drive circuit, and it is characterized in that, described diode VD5 is Transient Suppression Diode model is P6KE200.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520229083.1U CN204928580U (en) | 2015-04-12 | 2015-04-12 | Switching power supply controls drive circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520229083.1U CN204928580U (en) | 2015-04-12 | 2015-04-12 | Switching power supply controls drive circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707148A (en) * | 2016-12-01 | 2017-05-24 | 武汉市欧睿科技有限公司 | Switch characteristic tester |
| CN107240173A (en) * | 2017-05-24 | 2017-10-10 | 上海泰金电子科技有限公司 | A kind of intelligent entrance guard control system |
| CN110518803A (en) * | 2019-07-25 | 2019-11-29 | 杭州洲钜电子科技有限公司 | A kind of Switching Power Supply frequency control circuit and control method |
-
2015
- 2015-04-12 CN CN201520229083.1U patent/CN204928580U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707148A (en) * | 2016-12-01 | 2017-05-24 | 武汉市欧睿科技有限公司 | Switch characteristic tester |
| CN107240173A (en) * | 2017-05-24 | 2017-10-10 | 上海泰金电子科技有限公司 | A kind of intelligent entrance guard control system |
| CN110518803A (en) * | 2019-07-25 | 2019-11-29 | 杭州洲钜电子科技有限公司 | A kind of Switching Power Supply frequency control circuit and control method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151230 Termination date: 20170412 |
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| CF01 | Termination of patent right due to non-payment of annual fee |