CN205232031U - Single -ended switch voltage stabilizing circuit of high frequency - Google Patents
Single -ended switch voltage stabilizing circuit of high frequency Download PDFInfo
- Publication number
- CN205232031U CN205232031U CN201521089658.0U CN201521089658U CN205232031U CN 205232031 U CN205232031 U CN 205232031U CN 201521089658 U CN201521089658 U CN 201521089658U CN 205232031 U CN205232031 U CN 205232031U
- Authority
- CN
- China
- Prior art keywords
- voltage
- pwm controller
- circuit
- filter circuit
- high frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a single -ended switch voltage stabilizing circuit of high frequency, including low pass filter circuit, rectification filter circuit, switch adjustment pipe, high -frequency transformer, secondary rectification filter circuit and load end of electricity connection in proper order, wherein the AC input of low pass filter circuit connects the power frequency commercial power, external sample feedback circuit and PWM controller between secondary rectification filter circuit and the load end, the PWM controller is connected with switch adjustment pipe electricity, sample feedback circuit gathers the voltage signal through vary voltage, rectification, post -filter, feeds back to the PWM controller, by the PWM controller carries out the regulation control to the switch adjustment pipe. The utility model discloses the well PWM controller that uses the current mode utilizes controllable accurate steady voltage source and PWM controller to realize steady voltage output and control to mains voltage as the core, adopts the low pass filter circuit to suppress conducted interference, adopts the opto -coupler to keep apart and feed back, makes the utility model discloses a constant voltage power supply has good steady voltage nature, the ripple is little, load regulation voltage regulation is high advantage.
Description
Technical field
The utility model relates to electronic circuit technology field, in particular to the single-ended switch voltage-stabilizing circuit of a kind of high frequency.
Background technology
Along with the develop rapidly of current power electronic technology, particularly the developing rapidly of high-power MOS Manifold technology, the application of switching power supply is more extensive.The operating frequency of Switching Power Supply is brought up to 150-200kHz by this development, makes the switching loss of power supply less, and the operating efficiency of power supply can up to 90%-95%.Replace Industrial Frequency Transformer with high frequency transformer, the volume and weight of power supply has and reduces significantly; Output voltage ripple is reduced within 0.05% simultaneously, and stability can reach 0.5%-1%, and antijamming capability is strong and intelligence degree is high.Based on the characteristic that these are excellent, high-power switchgear power supply is more widely used in industry and military affairs.As in particle accelerator, electromagnetic emission, electromagnetic propulsion, microwave weapon isopulse power technology application, the average power of this type of power-supply device is usually more than hundreds of kilowatt even a few megawatt, volume and weight only has 1/tens of linear power supply, and operating efficiency is but higher than linear power supply a lot; And small-power switching power-supply is mainly used in the field such as household electrical appliances, IT, as on the electronic equipments such as computer, color television set, stored-program control exchange, video camera, Set Top Box, VCD, electronic game machine.
But people it is generally acknowledged that the efficiency of switching power supply is high, loss is low, but this loss can not be ignored under many circumstances, and the caloric value that causes of this loss has a strong impact on the reliability of power supply.
Someone wants by miniaturization of components is carried out Loss reducing, but the miniaturization of vigour part will certainly make switching power supply miniaturized, and this just there will be size and the disproportionate supply unit of loss, and its stability can reduce greatly, can not meet the requirement of people.
Utility model content
The purpose of this utility model is the problems referred to above for occurring in prior art, a kind of Voltage Feedback of the output by transformer and the current feedback of input are provided, make the voltage stable output after transformation at the single-ended switch voltage-stabilizing circuit of the high frequency of required value.
The purpose of this utility model realizes by following technical proposal:
The single-ended switch voltage-stabilizing circuit of a kind of high frequency, comprise the low-pass filter circuit be electrically connected successively, a current rectifying and wave filtering circuit, switch Correctional tube, high frequency transformer, secondary current rectifying and wave filtering circuit and load end, the ac input end of wherein said low-pass filter circuit connects power frequency civil power, external sampling feedback circuit and PWM controller between described secondary current rectifying and wave filtering circuit and load end, described PWM controller is electrically connected with switch Correctional tube, described sampling feedback circuit collection is through transformation, rectification, filtered voltage signal, feed back to described PWM controller, by described PWM controller, regulable control is carried out to switch Correctional tube.
Wherein, described sampling feedback circuit comprises controllable accurate source of stable pressure and optocoupler, and the voltage after transformation feeds back to PWM controller by described controllable accurate source of stable pressure and optocoupler with the form of Voltage Feedback.
Wherein, described PWM controller is current-control type pulse width modulating chip, by regulating duty ratio, inductance peak current is changed with error change.
Wherein, described PWM controller is UC3842.
The utility model has the following advantages and beneficial effect compared to existing technology:
In the utility model with the PWM controller of current mode for core, controllable accurate source of stable pressure and PWM controller is utilized to realize exporting the voltage stabilizing of supply voltage and controlling, low-pass filter circuit is adopted to suppress conducted interference, optocoupler is adopted to carry out isolating and feeding back, make voltage stabilizing circuit of the present utility model have excellent voltage stabilizing, ripple is little, load regulation voltage regulation is high advantage, meet fail safe and the EMC Requirements of circuit.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the single-ended switch voltage-stabilizing circuit of a kind of high frequency of the present utility model.
Fig. 2 is the schematic block diagram of the sampling feedback circuit in Fig. 1.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but the execution mode of the invention is not limited thereto.
Embodiment: as shown in Figure 1, the single-ended switch voltage-stabilizing circuit of a kind of high frequency, comprise the low-pass filter circuit be electrically connected successively, a current rectifying and wave filtering circuit, switch Correctional tube, high frequency transformer, secondary current rectifying and wave filtering circuit and load end, the ac input end of wherein said low-pass filter circuit connects power frequency civil power, external sampling feedback circuit and PWM controller between described secondary current rectifying and wave filtering circuit and load end, described PWM controller is electrically connected with switch Correctional tube, described sampling feedback circuit collection is through transformation, rectification, filtered voltage signal, feed back to described PWM controller, by described PWM controller, regulable control is carried out to switch Correctional tube.
As shown in Figure 2, described sampling feedback circuit comprises controllable accurate source of stable pressure and optocoupler, in this embodiment, described controllable accurate source of stable pressure is TL431, and the voltage after transformation feeds back to PWM controller by described controllable accurate source of stable pressure and optocoupler with the form of Voltage Feedback.
Wherein, described PWM controller is current-control type pulse width modulating chip UC3842, by regulating duty ratio, inductance peak current is changed with error change.
High frequency transformer exports and feeds back to 2 pin of UC3842 by controllable accurate source of stable pressure TL431 and optocoupler with the form of Voltage Feedback, when high frequency transformer auxiliary winding voltage increases, the reference voltage be added on controllable accurate source of stable pressure TL431 raises, increased by the electric current of light-emitting diode in optocoupler, electric current on phototriode is corresponding increase also, and the feedback end voltage of UC3842 increases thereupon, and the pulse signal duty ratio of output reduces, VT1 leads to the time and shortens, and output voltage reduces.Situation about exporting when winding voltage reduces is contrary with said process.Visible, by the Voltage Feedback of output and the current feedback of input, make high frequency transformer export the voltage stable output of winding at required value.
Certainly; above-mentioned explanation is not limitation of the utility model; the utility model is also not limited only to above-mentioned citing, the change that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement, also belongs to protection range of the present utility model.
Claims (3)
1. the single-ended switch voltage-stabilizing circuit of high frequency, comprise the low-pass filter circuit be electrically connected successively, a current rectifying and wave filtering circuit, switch Correctional tube, high frequency transformer, secondary current rectifying and wave filtering circuit and load end, the ac input end of wherein said low-pass filter circuit connects power frequency civil power, external sampling feedback circuit and PWM controller between described secondary current rectifying and wave filtering circuit and load end, described PWM controller is electrically connected with switch Correctional tube, described sampling feedback circuit collection is through transformation, rectification, filtered voltage signal, feed back to described PWM controller, by described PWM controller, regulable control is carried out to switch Correctional tube.
2. the single-ended switch voltage-stabilizing circuit of a kind of high frequency according to claim 1, it is characterized in that: described sampling feedback circuit comprises controllable accurate source of stable pressure and optocoupler, the voltage after transformation feeds back to PWM controller by described controllable accurate source of stable pressure and optocoupler with the form of Voltage Feedback.
3. the single-ended switch voltage-stabilizing circuit of a kind of high frequency according to claim 1 and 2, is characterized in that: described PWM controller is current-control type pulse width modulating chip, by regulating duty ratio, inductance peak current is changed with error change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521089658.0U CN205232031U (en) | 2015-12-24 | 2015-12-24 | Single -ended switch voltage stabilizing circuit of high frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521089658.0U CN205232031U (en) | 2015-12-24 | 2015-12-24 | Single -ended switch voltage stabilizing circuit of high frequency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205232031U true CN205232031U (en) | 2016-05-11 |
Family
ID=55907073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521089658.0U Expired - Fee Related CN205232031U (en) | 2015-12-24 | 2015-12-24 | Single -ended switch voltage stabilizing circuit of high frequency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205232031U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019056318A1 (en) * | 2017-09-22 | 2019-03-28 | Oppo广东移动通信有限公司 | Power supply circuit, power supply device, and control method |
-
2015
- 2015-12-24 CN CN201521089658.0U patent/CN205232031U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019056318A1 (en) * | 2017-09-22 | 2019-03-28 | Oppo广东移动通信有限公司 | Power supply circuit, power supply device, and control method |
| US11251712B2 (en) | 2017-09-22 | 2022-02-15 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Power supply circuit, power supply device and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203788154U (en) | Multipath output DC/DC secondary power supply system | |
| CN109525132A (en) | A kind of interleaved PFC constant voltage drive circuit, driving power and television set | |
| CN204145302U (en) | Multiple transformers parallel connection type Width funtion input DC-DC switching power circuit | |
| CN104467437A (en) | Low stand-by power consumption switching power supply | |
| CN101662214B (en) | High voltage isolating switch power and a plurality of output isolated switch power systems | |
| CN103683952B (en) | A kind of integration in parallel connection formula Buck-Flyback power factor correction pfc converter topology | |
| CN110071641B (en) | Power conversion and supply circuit and operation method thereof | |
| TW201414153A (en) | Voltage supply system and converter therein, and voltage regulating method | |
| CN202940740U (en) | High-power PWM type switch voltage-stabilized power supply | |
| CN205232031U (en) | Single -ended switch voltage stabilizing circuit of high frequency | |
| CN201846229U (en) | Soft start circuit | |
| CN109217653A (en) | Electromagnetic switch feedforward and feedback control module with super wide working voltage | |
| CN105591558A (en) | Single-pole high-power-factor push-pull double-forward circuit and design method thereof | |
| CN102810986B (en) | A kind of series topology LED switch power circuit | |
| CN204928580U (en) | Switching power supply controls drive circuit | |
| CN103296747A (en) | Uninterrupted power system | |
| CN102468767A (en) | Power supply circuit | |
| Onal et al. | A new single switch bridgeless SEPIC PFC converter with low cost, low THD and high PF | |
| CN204705931U (en) | Wide region is adjustable linear stabilized power supply | |
| CN201774469U (en) | Power supply changeover device with power factor correction function | |
| CN104467420A (en) | Voltage stabilizing circuit of switching power supply | |
| CN203911761U (en) | Switching power supply circuit and electronic device | |
| CN204408192U (en) | A kind of switch power voltage-stabilizing circuit | |
| CN204013269U (en) | power driving circuit | |
| CN203554296U (en) | Power supply module for servo driver, and servo driver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160511 Termination date: 20181224 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |