CN201869113U - Single-ended flyback switching power supply and control device thereof - Google Patents
Single-ended flyback switching power supply and control device thereof Download PDFInfo
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- CN201869113U CN201869113U CN2010206434016U CN201020643401U CN201869113U CN 201869113 U CN201869113 U CN 201869113U CN 2010206434016 U CN2010206434016 U CN 2010206434016U CN 201020643401 U CN201020643401 U CN 201020643401U CN 201869113 U CN201869113 U CN 201869113U
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Abstract
The utility model provides a single-ended flyback switching power supply and a control device thereof, wherein the control device of the single-ended flyback switching power supply consists of a control signal generating module, a voltage feedback module and a current feedback module, wherein the voltage feedback module consists of a voltage stabilizing filter unit, a voltage stabilizing discharge unit, a photoelectric coupler and a voltage stabilizing unit that are connected in sequence. The single-ended flyback switching power supply consists of a transformer, a control switch, a first diode and the control device of the single-ended flyback switching power supply, wherein the control switch is switched on or off under the control of the control signal generated by the control device of the single-ended flyback switching power supply. As for the single-ended flyback switching power supply and the control device thereof, the arrangement of the voltage feedback module as well as the voltage stabilizing filter unit, the voltage stabilizing discharge unit, the photoelectric coupler and the voltage stabilizing unit improves the stability of the single-ended flyback switching power supply.
Description
Technical field
The utility model relates to switch power technology, relates in particular to a kind of single-ended reverse exciting switching voltage regulator and control device thereof.
Background technology
Along with the develop rapidly of modern science and technology, power device is also brought in constant renewal in, and Switching Power Supply is described as energy-efficient power supply, and it is representing the direction of stabilized voltage power supply, has now become the main product of stabilized voltage power supply.
Fig. 1 is the single-ended reverse exciting switching voltage regulator electrical block diagram of prior art, as shown in Figure 1, this single-ended reverse exciting switching voltage regulator comprises transformer T, control switch M and control signal generating module 101, control switch M adopts power semiconductor usually, between the turn-on and turn-off state, switch under the control of the pulse width modulation that control switch M produces in control signal generating module 101 (Pulse Width Modulation is called for short PWM) signal.Control switch M is connected between transformer T primary coil and the ground contacts, can recently adjust the ON time of control switch M by the duty of control pwm signal, to adjust output voltage.The end of the same name of the primary coil of transformer T and secondary coil is opposite, and the secondary coil of transformer T is connected with the first diode D1, the basic functional principle of single-ended reverse exciting switching voltage regulator circuit is: when control switch M is closed, because the voltage direction of secondary coil is opposite with the voltage direction of primary coil, the first diode D1 oppositely ends, the primary coil storage power, when control switch M turn-offs, the voltage reversal of secondary coil, the first diode D1 conducting, the power conversion of primary coil is to secondary coil.
Single-ended reverse exciting switching voltage regulator generally adopts the double loop feedback control system, and double loop feedback comprises output dc voltage feedback loop and the primary coil peak current feedback loop that magnetizes.Isolate the magnetize sample rate current signal of peak current sampling feedback inner looping feedback of the sampled voltage signal of sampling feedback external loop feedback and primary coil according to output dc voltage, indication control signal generating module 101 is adjusted the duty ratio of pwm signal, thereby in each cycle, the output voltage in previous cycle and the primary coil peak current that magnetizes is effectively regulated, reached the purpose of regulated output voltage.
Fig. 2 is the electrical block diagram of the output dc voltage feedback circuit of prior art, as shown in Figure 2, this voltage feedback circuit is simple in structure, but poor anti jamming capability, control precision are not high, and must possess frequency compensated circuit 102, but frequency compensated circuit 102 also brings vibration to Switching Power Supply simultaneously, can influence the operate as normal of Switching Power Supply when serious, the low-response under the big and output voltage variation situation greatly for load variations is not suitable for the occasion of the higher or load variations wider range of precision.The primary coil of the single-ended reverse exciting switching voltage regulator of the prior art peak current feedback loop that magnetizes adopts the Direct Sampling resistance mode usually, this mode when electric current flows through sampling resistor, certain perceptual voltage of will inducting.The impedance meeting that this inductive component presents when high frequency is very big, circuit is produced disturb, and it will consume very big power simultaneously.Increase along with frequency, the electric current that flows through sampling resistor might also not put before the next one concussion cycle arrives, the electric current that sampling resistor bears so not only consumes a lot of power of Switching Power Supply with increasing, also may cause the misoperation of control signal generating module 101 simultaneously.
The utility model content
The utility model provides a kind of single-ended reverse exciting switching voltage regulator and control device thereof, to improve the stability of single-ended reverse exciting switching voltage regulator.
The utility model provides a kind of single-ended reverse exciting switching voltage regulator control device; The gauge tap that is used for the control single-ended reverse exciting switching voltage regulator; Comprise control signal generation module, Voltage Feedback module and current feedback module; Described Voltage Feedback module is connected between the Voltage Feedback input of the output of described single-ended reverse exciting switching voltage regulator and described control signal generation module; Described current feedback module is connected between the current feedback input of the input of described single-ended reverse exciting switching voltage regulator and described control signal generation module; Wherein
Described Voltage Feedback module comprises voltage regulation filtering unit, voltage stabilizing amplifying unit, photoelectrical coupler and voltage regulation unit, the input of described voltage regulation filtering unit links to each other with the output of described single-ended reverse exciting switching voltage regulator, described voltage regulation filtering unit, described voltage stabilizing amplifying unit, described photoelectrical coupler are connected successively with described voltage regulation unit, and the output of described voltage regulation unit links to each other with the Voltage Feedback input of described control signal generating module.
Aforesaid single-ended reverse exciting switching voltage regulator control device, wherein,
Described current feedback module comprises current transformer and sampling resistor, the input of described current transformer links to each other with the input of described single-ended reverse exciting switching voltage regulator, and the output of described current transformer links to each other with the current feedback input of described control signal generating module by described sampling resistor.
Aforesaid single-ended reverse exciting switching voltage regulator control device, wherein,
Described photoelectrical coupler comprises first photoelectric conversion unit, second photoelectric conversion unit, voltage input end, pressure feedback port and voltage output end, described first photoelectric conversion unit is connected between described voltage input end and the described pressure feedback port, and described second photoelectric conversion unit is connected between described voltage input end and the described voltage output end;
Described voltage regulation filtering unit comprises first operational amplifier and first electric capacity, the output of described first operational amplifier links to each other with the inverting input of described first operational amplifier, the in-phase input end of described first operational amplifier links to each other with the output of described single-ended reverse exciting switching voltage regulator, and is connected to described ground contacts by described first electric capacity;
Described voltage stabilizing amplifying unit comprises second operational amplifier and first resistance, the in-phase input end of described second operational amplifier links to each other with the output of described first operational amplifier, the inverting input of described second operational amplifier links to each other with the pressure feedback port of described photoelectrical coupler, and being connected to described ground contacts by described first resistance, the output of described second operational amplifier links to each other with the voltage input end of described photoelectrical coupler;
Described voltage regulation unit comprises the 3rd operational amplifier and second resistance, the in-phase input end of described the 3rd operational amplifier links to each other with the voltage output end of described photoelectrical coupler, and be connected to described ground contacts by described second resistance, the output of described the 3rd operational amplifier links to each other with the inverting input of described the 3rd operational amplifier, and links to each other with the Voltage Feedback input of described control signal generating module.
Aforesaid single-ended reverse exciting switching voltage regulator control device, wherein, described Voltage Feedback module also comprises partial pressure unit,
Described partial pressure unit comprises the 3rd resistance and the 4th resistance, be connected across between the output of described single-ended reverse exciting switching voltage regulator after described the 3rd resistance and the series connection of described the 4th resistance, the tie point of described the 3rd resistance and described the 4th resistance links to each other with the in-phase input end of described first operational amplifier.
Aforesaid single-ended reverse exciting switching voltage regulator control device, wherein, described Voltage Feedback module also comprises:
The 5th resistance is connected between the tie point of the in-phase input end of described first operational amplifier and described the 3rd resistance and described the 4th resistance;
The 6th resistance is connected between the in-phase input end of the output of described first operational amplifier and described second operational amplifier;
The 7th resistance is connected between the in-phase input end and described ground contacts of described second operational amplifier;
The 8th resistance is connected between the voltage input end of the output of described second operational amplifier and described photoelectrical coupler.
Aforesaid single-ended reverse exciting switching voltage regulator control device, wherein, described current feedback module also comprises:
Second electric capacity is connected between the output and described ground contacts of described current transformer.
The utility model provides a kind of single-ended reverse exciting switching voltage regulator, comprise transformer, control switch and first diode, described control switch is connected between the primary coil and ground contacts of described transformer, described first diode is connected with the secondary coil of described transformer, when described control switch conducting, described first diode reverse is ended, it is characterized in that, also comprise the single-ended reverse exciting switching voltage regulator control device that the utility model provides, described single-ended reverse exciting switching voltage regulator control device links to each other with described control switch.
Aforesaid single-ended reverse exciting switching voltage regulator also comprises the input protection module, the parallel connection of primary windings of described input protection module and described transformer, and described input protection module comprises:
The 9th resistance, the 3rd electric capacity and second diode are connected with described second diode after described the 9th resistance and described the 3rd electric capacity parallel connection.
Aforesaid single-ended reverse exciting switching voltage regulator also comprises buffer module, and described buffer module is connected between the primary coil and described ground contacts of described transformer, and in parallel with described control switch, and described buffer module comprises:
The tenth resistance, the 4th electric capacity and the 3rd diode, described the tenth resistance with after described the 3rd diode is in parallel with described the 4th capacitances in series.
Aforesaid single-ended reverse exciting switching voltage regulator, wherein, the quantity of the secondary coil of described transformer is a plurality of.
As shown from the above technical solution, single-ended reverse exciting switching voltage regulator that the utility model provides and control device thereof, the Voltage Feedback module is by the setting of voltage regulation filtering unit, voltage stabilizing amplifying unit, photoelectrical coupler and voltage regulation unit, voltage feedback signal is carried out voltage stabilizing, filtering, isolation and processing and amplifying, improved the stability of single-ended reverse exciting switching voltage regulator.
Description of drawings
Fig. 1 is the single-ended reverse exciting switching voltage regulator electrical block diagram of prior art;
Fig. 2 is the electrical block diagram of the output dc voltage feedback circuit of prior art;
The single-ended reverse exciting switching voltage regulator control device structural representation that Fig. 3 provides for the utility model embodiment one;
The single-ended reverse exciting switching voltage regulator control device electrical block diagram that Fig. 4 provides for the utility model embodiment two;
The single-ended reverse exciting switching voltage regulator electrical block diagram that Fig. 5 provides for the utility model embodiment three.
Reference numeral:
The 101-control signal generating module; The 102-frequency compensated circuit; 103-Voltage Feedback module;
104-current feedback module; 113-voltage regulation filtering unit; 123-voltage stabilizing amplifying unit;
The 133-photoelectrical coupler; The 143-voltage regulation unit; The T-transformer;
The M-control switch; The GND-ground contacts; D1-first diode;
D2-second diode; D3-the 3rd diode; R1-first resistance;
R2-second resistance; R3-the 3rd resistance; R4-the 4th resistance;
R5-the 5th resistance; R6-the 6th resistance; R7-the 7th resistance;
R8-the 8th resistance; R9-the 9th resistance; R10-the tenth resistance;
A1-first operational amplifier; C1-first electric capacity; C2-second electric capacity;
A2-first operational amplifier; C3-the 3rd electric capacity; C4-the 4th electric capacity;
A3-first operational amplifier.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with the accompanying drawing among the utility model embodiment, technical scheme among the utility model embodiment is clearly and completely described, need to prove, in accompanying drawing or specification, similar or components identical is all used identical Reference numeral.Obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment one
The single-ended reverse exciting switching voltage regulator control device structural representation that Fig. 3 provides for the utility model embodiment one, as shown in Figure 3, this single-ended reverse exciting switching voltage regulator control device comprises control signal generating module 101, Voltage Feedback module 103 and current feedback module 104, is used to control the control switch M of single-ended reverse exciting switching voltage regulator.Voltage Feedback module 103 is connected between the Voltage Feedback input of the output of single-ended reverse exciting switching voltage regulator and control signal generating module 101, Voltage Feedback module 103 is used for the output voltage of the output of single-ended reverse exciting switching voltage regulator is handled, to produce the sampled voltage signal.Current feedback module 104 is connected between the current feedback input of the input of single-ended reverse exciting switching voltage regulator and control signal generating module 101, current feedback module 104 is used for the electric current of single-ended reverse exciting switching voltage regulator input is handled, to produce the sample rate current signal.Control signal generating module 101 produces control signal according to the sampled voltage signal of Voltage Feedback module 103 generations and the sample rate current signal of current feedback module 104 generations.Voltage Feedback module 103 comprises voltage regulation filtering unit 113, voltage stabilizing amplifying unit 123, photoelectrical coupler 133 and voltage regulation unit 143, the input of voltage regulation filtering unit 113 links to each other with the output of single-ended reverse exciting switching voltage regulator, voltage regulation filtering unit 113, voltage stabilizing amplifying unit 123, photoelectrical coupler 133 and voltage regulation unit 143 are connected successively, and the output of voltage regulation unit 143 links to each other with the Voltage Feedback input of control signal generating module 101.The single-ended reverse exciting switching voltage regulator control device that present embodiment provides, the output voltage of the output of single-ended reverse exciting switching voltage regulator is handled the sampled voltage signal stabilization height that the back produces by voltage regulation filtering unit 113, voltage stabilizing amplifying unit 123, photoelectrical coupler 133 and voltage regulation unit 143, feedback speed is fast, need not to increase the frequency compensation link, make Voltage Feedback have real-time, and dead-beat influences, and has improved the stability of single-ended reverse exciting switching voltage regulator.
In the present embodiment, current feedback module 104 can comprise current transformer and sampling resistor, the input of current transformer links to each other with the input of single-ended reverse exciting switching voltage regulator, and the output of current transformer links to each other with the current feedback input of control signal generating module 101 by sampling resistor R.Current transformer generally includes mutual inductor, resistance of cross-over connection between the secondary coil of mutual inductor, and the umber of turn of secondary coil is greater than the umber of turn of primary coil.Therefore the setting by current transformer, the bigger input current of the input of single-ended reverse exciting switching voltage regulator can be converted to less current output, not only realized the electrical isolation of input and output, reduced the loss of single-ended reverse exciting switching voltage regulator, and owing to reduce through the electric current on the sampling resistor, the impedance of sampling resistor can not increase sharply along with the increase of frequency, even under high frequency situations, the power that sampling resistor consumed is also very little, has further improved the antijamming capability and the operating efficiency of single-ended reverse exciting switching voltage regulator.
Embodiment two
The single-ended reverse exciting switching voltage regulator control device electrical block diagram that Fig. 4 provides for the utility model embodiment two, the photoelectrical coupler 133 of this single-ended reverse exciting switching voltage regulator control device specifically can comprise first photoelectric conversion unit, second photoelectric conversion unit, voltage input end, pressure feedback port and voltage output end, first photoelectric conversion unit is connected between voltage input end and the pressure feedback port, and second photoelectric conversion unit is connected between voltage input end and the voltage output end.Preferably, photoelectrical coupler 133 can adopt CNR201, and CNR201 is the high-speed linear optocoupler, has improved feedback response speed, and then has improved the accuracy of Voltage Feedback.Realize output and the isolation of importing by being provided with of photoelectrical coupler 133, improved the stability of Voltage Feedback.Voltage regulation filtering unit 113 can comprise first operational amplifier A 1 and first capacitor C 1, the output of first operational amplifier A 1 links to each other with the inverting input of first operational amplifier A 1, the in-phase input end of first operational amplifier A 1 links to each other with the output of single-ended reverse exciting switching voltage regulator, and is connected to ground contacts GND by first capacitor C 1.Voltage stabilizing amplifying unit 123 can comprise second operational amplifier A 2 and first resistance R 1, the in-phase input end of second operational amplifier A 2 links to each other with the output of first operational amplifier A 1, the inverting input of second operational amplifier A 2 links to each other with the pressure feedback port of photoelectrical coupler 133, and being connected to ground contacts GND by first resistance R 1, the output of second operational amplifier A 2 links to each other with the voltage input end of photoelectrical coupler 133.Voltage regulation unit 143 can comprise the 3rd operational amplifier A 3 and second resistance R 2, the in-phase input end of the 3rd operational amplifier A 3 links to each other with the voltage output end of photoelectrical coupler 133, and be connected to ground contacts GND by second resistance R 2, the output of the 3rd operational amplifier A 3 links to each other with the inverting input of the 3rd operational amplifier A 3, and links to each other with the Voltage Feedback input of control signal generating module 101.Preferably, first operational amplifier A 1, second operational amplifier A 2 and the 3rd operational amplifier A 3 all can adopt LM158, LM158 is a low-power consumption high-gain dual operational amplifier, can reduce the power loss of Voltage Feedback module 103, improves the stability of Voltage Feedback.Those skilled in the art also can adopt other elements, and perhaps other circuit forms are realized voltage regulation filtering unit 113, voltage stabilizing amplifying unit 123, photoelectrical coupler 133 and voltage regulation unit 143, do not exceed with present embodiment.
In the present embodiment, Voltage Feedback module 103 can also comprise partial pressure unit, partial pressure unit comprises the 3rd resistance R 3 and the 4th resistance R 4, be connected across between the output of single-ended reverse exciting switching voltage regulator after the 3rd resistance R 3 and 4 series connection of the 4th resistance R, the tie point of the 3rd resistance R 3 and the 4th resistance R 4 links to each other with the in-phase input end of first operational amplifier A 1.By the setting of partial pressure unit, when excessive, can carry out dividing potential drop to the output voltage range of single-ended reverse exciting switching voltage regulator to it, the input voltage that is about to Voltage Feedback module 103 is adjusted within the working range, has improved the fail safe of Voltage Feedback module 103.Can come division module is provided with according to physical circuit input voltage demand, not exceed with present embodiment.
For obtaining suitable voltage, can connect suitable resistance element between each device of technique scheme, Voltage Feedback module 103 comprises that also the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7 and the 8th resistance R 8, the five resistance R 5 are connected between the tie point of the in-phase input end of first operational amplifier A 1 and the 3rd resistance R 3 and the 4th resistance R 4.The 6th resistance R 6 is connected between the in-phase input end of the output of first operational amplifier A 1 and second operational amplifier A 2.The 7th resistance R 7 is connected between the in-phase input end and ground contacts GND of second operational amplifier A 2.The 8th resistance R 8 is connected between the voltage input end of the output of second operational amplifier A 2 and photoelectrical coupler 133.Current feedback module 104 can also comprise that second capacitor C, 2, the second capacitor C 2 are connected between the output and ground contacts GND of current transformer.By the setting of second capacitor C 2, feedback current is carried out filtering, improved the stability of current feedback.
Embodiment three
The single-ended reverse exciting switching voltage regulator electrical block diagram that Fig. 5 provides for the utility model embodiment three, as shown in Figure 5, this single-ended reverse exciting switching voltage regulator, comprise transformer T, the control switch M and the first diode D1, control switch M is connected between the primary coil and ground contacts GND of transformer T, the first diode D1 connects with the secondary coil of transformer T, when control switch M conducting, the first diode D1 oppositely ends, single-ended reverse exciting switching voltage regulator also comprises the single-ended reverse exciting switching voltage regulator control device that the utility model any embodiment provides, the single-ended reverse exciting switching voltage regulator control device links to each other with control switch M, and control switch M switches between the turn-on and turn-off state under the control of the control signal that the single-ended reverse exciting switching voltage regulator control device produces.
Control signal generating module 101 in the single-ended reverse exciting switching voltage regulator control device specifically can adopt UC3844, control switch M is specifically as follows isolated gate FET, in actual applications, control signal generating module 101 also can adopt other pulse width modulator chip, do not exceed with present embodiment, the concrete course of work of this single-ended reverse exciting switching voltage regulator is: control signal generation circuit produces control signal, be specifically as follows pwm signal, M controls to control switch, when control switch M is in conducting state, because the voltage direction of secondary coil is opposite with the voltage direction of primary coil, the first diode D1 oppositely ends, the primary coil storage power, when control switch M turn-offs, the voltage reversal of secondary coil, diode current flow, the power conversion of primary coil further can be carried out filtering to output voltage at the two ends of secondary coil cross-over connection electric capacity to secondary coil.The voltage of transformer T output is through the voltage stabilizing of voltage feedback circuit, filtering, after amplification and the isolation processing, convert the sampled voltage signal to and offer control signal generating module 101, the input current of 104 couples of transformer T of current feedback module primary coil is isolated, after conversion and the Filtering Processing, generate the sample rate current signal and offer control signal generating module 101, control signal generating module 101 is adjusted the duty ratio of control signal according to sampled voltage signal and sample rate current signal, and then the time of the turn-on and turn-off of adjustment control switch M, to adjust output voltage, improved the stability of output voltage.
In the present embodiment; single-ended reverse exciting switching voltage regulator can also comprise the input protection module; the parallel connection of primary windings of input protection module and transformer T; the input protection module comprises the 9th resistance R 9, the 3rd capacitor C 3 and the second diode D2, connects with the second diode D2 in the 9th resistance R 9 and the 3rd capacitor C 3 backs in parallel.Transformer T in the single-ended reverse exciting switching voltage regulator is generally high frequency transformer, the setting of input protection module, and the peak voltage that the high frequency transformer leakage inductance is caused limits, and has improved the fail safe and the stability of single-ended reverse exciting switching voltage regulator.
In the present embodiment, single-ended reverse exciting switching voltage regulator can also comprise buffer module, buffer module is connected between the primary coil and ground contacts GND of transformer T, and it is in parallel with control switch M, buffer module comprises the tenth resistance R 10, the 4th capacitor C 4 and the 3rd diode D3, connects with the 4th capacitor C 4 after the tenth resistance R 10 and the 3rd diode D3 parallel connection.Being provided with of buffer module can prevent that control switch M from bearing big back-pressure in turn off process, avoided the impact failure of control switch M.
In the present embodiment, the quantity of the secondary coil of transformer T is a plurality of, be that output voltage is a plurality of, the scope of output voltage also can be provided with by the winding of secondary coil, make single-ended reverse exciting switching voltage regulator can export the direct voltage of different amplitudes, improved the adaptability of single-ended reverse exciting switching voltage regulator.
Single-ended reverse exciting switching voltage regulator that the utility model provides and control device thereof, the Voltage Feedback module is by the setting of voltage regulation filtering unit, voltage stabilizing amplifying unit, photoelectrical coupler and voltage regulation unit, improved feedback response speed, make Voltage Feedback have real-time, improved the stability of single-ended reverse exciting switching voltage regulator.
It should be noted that at last: above embodiment only in order to the explanation the technical solution of the utility model, is not intended to limit; Although the utility model is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that previous embodiment is put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (10)
1. single-ended reverse exciting switching voltage regulator control device, be used to control the control switch of single-ended reverse exciting switching voltage regulator, described device comprises control signal generating module, Voltage Feedback module and current feedback module, described Voltage Feedback module is connected between the Voltage Feedback input of the output of described single-ended reverse exciting switching voltage regulator and described control signal generating module, described current feedback module is connected between the current feedback input of the input of described single-ended reverse exciting switching voltage regulator and described control signal generating module, it is characterized in that:
Described Voltage Feedback module comprises voltage regulation filtering unit, voltage stabilizing amplifying unit, photoelectrical coupler and voltage regulation unit, the input of described voltage regulation filtering unit links to each other with the output of described single-ended reverse exciting switching voltage regulator, described voltage regulation filtering unit, described voltage stabilizing amplifying unit, described photoelectrical coupler are connected successively with described voltage regulation unit, and the output of described voltage regulation unit links to each other with the Voltage Feedback input of described control signal generating module.
2. single-ended reverse exciting switching voltage regulator control device according to claim 1 is characterized in that:
Described current feedback module comprises current transformer and sampling resistor, the input of described current transformer links to each other with the input of described single-ended reverse exciting switching voltage regulator, and the output of described current transformer links to each other with the current feedback input of described control signal generating module by described sampling resistor.
3. single-ended reverse exciting switching voltage regulator control device according to claim 1 is characterized in that:
Described photoelectrical coupler comprises first photoelectric conversion unit, second photoelectric conversion unit, voltage input end, pressure feedback port and voltage output end, described first photoelectric conversion unit is connected between described voltage input end and the described pressure feedback port, and described second photoelectric conversion unit is connected between described voltage input end and the described voltage output end;
Described voltage regulation filtering unit comprises first operational amplifier and first electric capacity, the output of described first operational amplifier links to each other with the inverting input of described first operational amplifier, the in-phase input end of described first operational amplifier links to each other with the output of described single-ended reverse exciting switching voltage regulator, and is connected to described ground contacts by described first electric capacity;
Described voltage stabilizing amplifying unit comprises second operational amplifier and first resistance, the in-phase input end of described second operational amplifier links to each other with the output of described first operational amplifier, the inverting input of described second operational amplifier links to each other with the pressure feedback port of described photoelectrical coupler, and being connected to described ground contacts by described first resistance, the output of described second operational amplifier links to each other with the voltage input end of described photoelectrical coupler;
Described voltage regulation unit comprises the 3rd operational amplifier and second resistance, the in-phase input end of described the 3rd operational amplifier links to each other with the voltage output end of described photoelectrical coupler, and be connected to described ground contacts by described second resistance, the output of described the 3rd operational amplifier links to each other with the inverting input of described the 3rd operational amplifier, and links to each other with the Voltage Feedback input of described control signal generating module.
4. single-ended reverse exciting switching voltage regulator control device according to claim 3 is characterized in that, described Voltage Feedback module also comprises partial pressure unit,
Described partial pressure unit comprises the 3rd resistance and the 4th resistance, be connected across between the output of described single-ended reverse exciting switching voltage regulator after described the 3rd resistance and the series connection of described the 4th resistance, the tie point of described the 3rd resistance and described the 4th resistance links to each other with the in-phase input end of described first operational amplifier.
5. single-ended reverse exciting switching voltage regulator control device according to claim 4 is characterized in that, described Voltage Feedback module also comprises:
The 5th resistance is connected between the tie point of the in-phase input end of described first operational amplifier and described the 3rd resistance and described the 4th resistance;
The 6th resistance is connected between the in-phase input end of the output of described first operational amplifier and described second operational amplifier;
The 7th resistance is connected between the in-phase input end and described ground contacts of described second operational amplifier;
The 8th resistance is connected between the voltage input end of the output of described second operational amplifier and described photoelectrical coupler.
6. single-ended reverse exciting switching voltage regulator control device according to claim 2 is characterized in that, described current feedback module also comprises:
Second electric capacity is connected between the output and described ground contacts of described current transformer.
7. single-ended reverse exciting switching voltage regulator, comprise transformer, control switch and first diode, described control switch is connected between the primary coil and ground contacts of described transformer, described first diode is connected with the secondary coil of described transformer, when described control switch conducting, described first diode reverse is ended, it is characterized in that, also comprise the arbitrary described single-ended reverse exciting switching voltage regulator control device of claim 1-6, described single-ended reverse exciting switching voltage regulator control device links to each other with described control switch.
8. single-ended reverse exciting switching voltage regulator according to claim 7 is characterized in that, also comprises the input protection module, the parallel connection of primary windings of described input protection module and described transformer, and described input protection module comprises:
The 9th resistance, the 3rd electric capacity and second diode are connected with described second diode after described the 9th resistance and described the 3rd electric capacity parallel connection.
9. single-ended reverse exciting switching voltage regulator according to claim 8 is characterized in that, also comprises buffer module, and described buffer module is connected between the primary coil and described ground contacts of described transformer, and in parallel with described control switch, and described buffer module comprises:
The tenth resistance, the 4th electric capacity and the 3rd diode, described the tenth resistance with after described the 3rd diode is in parallel with described the 4th capacitances in series.
10. single-ended reverse exciting switching voltage regulator according to claim 7 is characterized in that: the quantity of the secondary coil of described transformer is a plurality of.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010206434016U CN201869113U (en) | 2010-11-30 | 2010-11-30 | Single-ended flyback switching power supply and control device thereof |
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| CN2010206434016U CN201869113U (en) | 2010-11-30 | 2010-11-30 | Single-ended flyback switching power supply and control device thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102480232A (en) * | 2010-11-30 | 2012-05-30 | 永济新时速电机电器有限责任公司 | Single-ended flyback switching power supply and control device thereof |
| CN106921303B (en) * | 2017-03-13 | 2023-08-11 | 深圳市安姆伯科技有限公司 | Switching power supply transformer |
-
2010
- 2010-11-30 CN CN2010206434016U patent/CN201869113U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102480232A (en) * | 2010-11-30 | 2012-05-30 | 永济新时速电机电器有限责任公司 | Single-ended flyback switching power supply and control device thereof |
| CN106921303B (en) * | 2017-03-13 | 2023-08-11 | 深圳市安姆伯科技有限公司 | Switching power supply transformer |
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