CN205960990U - Power electronic switching power supply's voltage stabilizing circuit - Google Patents
Power electronic switching power supply's voltage stabilizing circuit Download PDFInfo
- Publication number
- CN205960990U CN205960990U CN201620511850.2U CN201620511850U CN205960990U CN 205960990 U CN205960990 U CN 205960990U CN 201620511850 U CN201620511850 U CN 201620511850U CN 205960990 U CN205960990 U CN 205960990U
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- circuit
- resistance
- output end
- triode
- voltage
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Abstract
The utility model discloses a power electronic switching power supply's voltage stabilizing circuit, include: rectification filter circuit, voltage acquisition circuit, feedback control circuit and output filter circuit, output filter circuit is connected to rectification filter circuit's output, voltage acquisition circuit is still connected to rectification filter circuit's output, the feedback control circuit is connected to voltage acquisition circuit's output, rectification filter circuit is connected to the output of feedback control circuit. The utility model discloses a voltage acquisition circuit carries out voltage acquisition to the output, obtains the sampling voltage through two sets of series resistance, carries out the comparison through the comparator, realizes power electronic switching power supply's steady voltage, the normal operating of proof load.
Description
Technical field
The utility model is related to a kind of electronic technology field, particularly to a kind of voltage stabilizing electricity of electronic power switch power supply
Road.
Background technology
Switching Power Supply is exactly as switch element using power semiconductor, by periodic on-off switch, controls
The dutycycle adjustment output voltage of switch element, by arranging mu balanced circuit on the output voltage so that in input voltage, bearing
Carry, environment temperature and circuit parameter etc. remain to keep output voltage constant circuit when changing, general mu balanced circuit bag
Include adjustment element, reference voltage circuit, sample circuit and compare amplifying circuit.
Utility model content
Technical problem to be solved in the utility model is, for above-mentioned deficiency of the prior art, to provide a kind of electric power
The mu balanced circuit of electronic switch power.
The utility model solves its technical problem and be employed technical scheme comprise that：
A kind of mu balanced circuit of electronic power switch power supply is it is characterised in that include：Current rectifying and wave filtering circuit, voltage acquisition
Circuit, feedback control circuit and output filter circuit, the output end of described current rectifying and wave filtering circuit connects output filter circuit, described
The output end of current rectifying and wave filtering circuit is also connected with voltage collection circuit, and the output end of described voltage collection circuit connects feedback control electricity
Road, the output end of described feedback control circuit connects current rectifying and wave filtering circuit.
Further, described current rectifying and wave filtering circuit includes rectifier bridge D1-D4 and filter capacitor C1, described voltage collection circuit
Including resistance R1 resistance R2, resistance R3 and resistance R4, described feedback control circuit includes comparator U1 and triode Q1, described defeated
Go out filter circuit be electric capacity C2, described rectifier bridge D1-D4 output end parallel filtering electric capacity C1, resistance R1 and resistance R3 respectively with electricity
It is connected in parallel on the output end of output filter circuit, two inputs of comparator U1 are respectively at resistance R1 after resistance R2 and resistance R4 series connection
Connect with the junction of resistance R2 and the junction of resistance R3 and resistance R4, the grid of the output end of comparator U1 and triode Q1
Connect, the drain electrode of triode Q1 is connected with the cathode output end of current rectifying and wave filtering circuit, the source electrode of triode Q1 is electric with rectifying and wave-filtering
The cathode output end on road connects.
Further, the output end of current rectifying and wave filtering circuit is also connected with diode D1, and the positive terminal of described filter capacitor C1 is even
Connect the anode of diode D1, the drain electrode of triode Q1 is connected with the anode of diode D1.
Further, described voltage collection circuit also sets up pre-filtering electric capacity C2, and described pre-filtering electric capacity C2 is just
Pole is connected with the negative electrode of diode D1, and the negative pole of pre-filtering electric capacity C2 is connected with the cathode output end of current rectifying and wave filtering circuit.
Further, described triode Q1 is NMOS FET.
The utility model compared with prior art has advantages below：The utility model passes through voltage collection circuit to output
End carries out voltage acquisition, obtains sampling voltage by two groups of series resistances, is compared by comparator, when two groups of sampling voltages
When identical, show that output voltage is voltage stabilizing state, now the output end of comparator is high level, triode Q1 ends, and voltage is just
Often export, when the sampling voltage of collection is different, the output end of comparator is low level, and triode Q1 turns on, rectifying and wave-filtering electricity
The output end on road disconnects, Non voltage output, thus realizing the voltage stabilizing of electronic power switch power supply it is ensured that the normal operation of load.
Brief description
A kind of voltage regulator circuit structure figure of electronic power switch power supply that Fig. 1 provides for the utility model.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment describes the utility model specific embodiment：
Referring to Fig. 1, a kind of voltage regulator circuit structure figure of the electronic power switch power supply providing for the utility model.
As shown in figure 1, a kind of mu balanced circuit of electronic power switch power supply is it is characterised in that include：Rectifying and wave-filtering electricity
Road, voltage collection circuit, feedback control circuit and output filter circuit, the output end of described current rectifying and wave filtering circuit connects output filter
Wave circuit, the output end of described current rectifying and wave filtering circuit is also connected with voltage collection circuit, and the output end of described voltage collection circuit is even
Connect feedback control circuit, the output end of described feedback control circuit connects current rectifying and wave filtering circuit.
Further, described current rectifying and wave filtering circuit includes rectifier bridge D1-D4 and filter capacitor C1, described voltage collection circuit
Including resistance R1 resistance R2, resistance R3 and resistance R4, described feedback control circuit includes comparator U1 and triode Q1, described defeated
Go out filter circuit be electric capacity C2, described rectifier bridge D1-D4 output end parallel filtering electric capacity C1, resistance R1 and resistance R3 respectively with electricity
It is connected in parallel on the output end of output filter circuit, two inputs of comparator U1 are respectively at resistance R1 after resistance R2 and resistance R4 series connection
Connect with the junction of resistance R2 and the junction of resistance R3 and resistance R4, the grid of the output end of comparator U1 and triode Q1
Connect, the drain electrode of triode Q1 is connected with the cathode output end of current rectifying and wave filtering circuit, the source electrode of triode Q1 is electric with rectifying and wave-filtering
The cathode output end on road connects.
In the utility model embodiment, voltage acquisition is carried out to output end by voltage collection circuit, connected by two groups
Resistance obtains sampling voltage, is compared by comparator, when two groups of sampling voltages are identical, shows that output voltage is voltage stabilizing shape
State, now the output end of comparator is high level, and triode Q1 ends, and voltage normally exports, when the sampling voltage of collection is different
When, the output end of comparator is low level, and triode Q1 turns on, and the output end of current rectifying and wave filtering circuit disconnects, Non voltage output, from
And realize electronic power switch power supply voltage stabilizing it is ensured that load normal operation.
Further, the output end of current rectifying and wave filtering circuit is also connected with diode D1, and the positive terminal of described filter capacitor C1 is even
Connect the anode of diode D1, the drain electrode of triode Q1 is connected with the anode of diode D1.
Further, described voltage collection circuit also sets up pre-filtering electric capacity C2, and described pre-filtering electric capacity C2 is just
Pole is connected with the negative electrode of diode D1, and the negative pole of pre-filtering electric capacity C2 is connected with the cathode output end of current rectifying and wave filtering circuit.
Further, described triode Q1 is NMOS FET.
In the utility model embodiment, carried out surely by the voltage that pre-filtering electric capacity C2 exports to unilateral diode D1
Pressure, filters harmonic component, improves the stability of output voltage, using NMOS FET as output circuit controlling switch,
High-speed switch can be realized, switch performance is good.
Above in conjunction with accompanying drawing, the utility model preferred embodiment is explained in detail, but the utility model is not limited to
Above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, can also be without departing from the utility model
Make a variety of changes on the premise of objective.
Many other can be made without departing from spirit and scope of the present utility model to change and remodeling.It should be appreciated that this reality
It is not limited to specific embodiment with new, scope of the present utility model is defined by the following claims.
Claims (5)
1. a kind of mu balanced circuit of electronic power switch power supply is it is characterised in that include：Current rectifying and wave filtering circuit, voltage acquisition electricity
Road, feedback control circuit and output filter circuit, the output end of described current rectifying and wave filtering circuit connects output filter circuit, described whole
The output end of stream filter circuit is also connected with voltage collection circuit, and the output end of described voltage collection circuit connects feedback control electricity
Road, the output end of described feedback control circuit connects current rectifying and wave filtering circuit.
2. a kind of mu balanced circuit of electronic power switch power supply according to claim 1 is it is characterised in that described rectification is filtered
Wave circuit includes rectifier bridge D1-D4 and filter capacitor C1, and described voltage collection circuit includes resistance R1 resistance R2, resistance R3 and electricity
Resistance R4, described feedback control circuit includes comparator U1 and triode Q1, and described output filter circuit is electric capacity C2, described rectification
Bridge D1-D4 output end parallel filtering electric capacity C1, resistance R1 and resistance R3 is connected in parallel on defeated after connecting with resistance R2 and resistance R4 respectively
Go out the output end of filter circuit, two inputs of comparator U1 respectively at the junction of resistance R1 and resistance R2 and resistance R3 and
The junction of resistance R4 connects, and the output end of comparator U1 is connected with the grid of triode Q1, the drain electrode of triode Q1 and rectification
The cathode output end of filter circuit connects, and the source electrode of triode Q1 is connected with the cathode output end of current rectifying and wave filtering circuit.
3. a kind of mu balanced circuit of electronic power switch power supply according to claim 2 is it is characterised in that rectifying and wave-filtering is electric
The output end on road is also connected with diode D1, and the positive terminal of described filter capacitor C1 connects the anode of diode D1, triode Q1's
Drain electrode is connected with the anode of diode D1.
4. a kind of mu balanced circuit of electronic power switch power supply according to claim 2 is it is characterised in that described voltage is adopted
Collector also sets up pre-filtering electric capacity C2, and the positive pole of described pre-filtering electric capacity C2 is connected with the negative electrode of diode D1, preposition
The negative pole of filter capacitor C2 is connected with the cathode output end of current rectifying and wave filtering circuit.
5. a kind of mu balanced circuit of electronic power switch power supply according to claim 2 is it is characterised in that described triode
Q1 is NMOS FET.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620511850.2U CN205960990U (en) | 2016-05-31 | 2016-05-31 | Power electronic switching power supply's voltage stabilizing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620511850.2U CN205960990U (en) | 2016-05-31 | 2016-05-31 | Power electronic switching power supply's voltage stabilizing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205960990U true CN205960990U (en) | 2017-02-15 |
Family
ID=57966562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620511850.2U Expired - Fee Related CN205960990U (en) | 2016-05-31 | 2016-05-31 | Power electronic switching power supply's voltage stabilizing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205960990U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112332659A (en) * | 2020-09-18 | 2021-02-05 | 杭州小电科技股份有限公司 | Voltage stabilizing system and resistance-capacitance power supply |
-
2016
- 2016-05-31 CN CN201620511850.2U patent/CN205960990U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112332659A (en) * | 2020-09-18 | 2021-02-05 | 杭州小电科技股份有限公司 | Voltage stabilizing system and resistance-capacitance power supply |
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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: 20170215 Termination date: 20210531 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |