CN207150417U - A kind of Switching Power Supply that protection circuit is absorbed containing MOSFET pipes and its clamper - Google Patents
A kind of Switching Power Supply that protection circuit is absorbed containing MOSFET pipes and its clamper Download PDFInfo
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- CN207150417U CN207150417U CN201721069171.5U CN201721069171U CN207150417U CN 207150417 U CN207150417 U CN 207150417U CN 201721069171 U CN201721069171 U CN 201721069171U CN 207150417 U CN207150417 U CN 207150417U
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- electric capacity
- transformer
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Abstract
The utility model discloses a kind of Switching Power Supply that protection circuit is absorbed containing MOSFET pipes and its clamper; including rectifier, the first electric capacity, transformer, clamp circuit, MOSFET pipes, first resistor, the second diode, second resistance, the second electric capacity, the 3rd electric capacity, the first inductance, the 4th electric capacity, 3rd resistor; switched power output mouth; as long as use common, low price switch MOSFET pipes and clamp diode on existing market; the switch MOSFET pipes of high frequency switch power can be just allowed to be in low level in grid G pole, and VDSBe unlikely to damage in high-tension state lower switch MOSFET pipes, when switch MOSFET pipes drain D pole reach high potential when, Switching Power Supply can also normal work, so as to ensure the stability of whole Switching Power Supply and reliability.
Description
Technical field
The utility model belongs to field of switch power, more particularly to a kind of to absorb protection electricity containing MOSFET pipes and its clamper
The Switching Power Supply on road.
Background technology
At present, existing Switching Power Supply is all based on high frequency (small volume, efficiency high).And switch the conduct of MOSFET pipes and open
Critical device in powered-down source, with the increase of power, it is desirable to the electric current of MOSFET pipes and it is pressure-resistant also increase substantially, but city
It is few to the quantity in stock of this kind of device on field, and price is also very high, particularly pressure-resistant more than 900V switch MOSFET
Pipe, also only have the international style famous brand such as ROHM, TOSHIBA just to have at present.
In view of this, the present inventor specially devises a kind of switch that protection circuit is absorbed containing MOSFET pipes and its clamper
Thus power supply, this case produce.
Utility model content
The purpose of this utility model is to provide a kind of switch electricity for absorbing protection circuit containing MOSFET pipes and its clamper
Source, as long as using existing in the market common switch MOSFET pipes and clamp diode, that is, it can guarantee that switch MOSFET pipes not
It is impaired, ensure the stability and reliability of whole Switching Power Supply, the MOSFET pipe prices for solving current high frequency switch power are held high
The problem of expensive, supply is lacked.
To achieve these goals, the technical solution adopted in the utility model is as follows：
A kind of Switching Power Supply that protection circuit is absorbed containing MOSFET pipes and its clamper, including rectifier, the first electric capacity, change
Depressor, clamp circuit, MOSFET pipes, first resistor, the second diode, second resistance, the second electric capacity, the 3rd electric capacity, the first electricity
Sense, the 4th electric capacity, 3rd resistor, switched power output mouth；
Transformer includes armature winding and secondary windings, the armature winding of transformer be connected to transformer the first pin and
Between three-prong, the secondary windings of transformer is connected between the 7th pin of transformer and the 12nd pin；
First electric capacity is electrochemical capacitor, and the first pin of rectifier is connected with the live wire of alternating current, the 3rd pipe of rectifier
Pin is connected with the zero line of alternating current, and the second pin of rectifier is connected with the positive pole of the first electric capacity, the negative pole of the first electric capacity with it is whole
4th pin of stream device is connected；First pin of transformer is connected with the live wire of alternating current, the three-prong of transformer respectively with
The drain electrode of MOSFET pipes, one end of clamp circuit are connected, and the grid of MOSFET pipes is connected with sine wave signal, the source of MOSFET pipes
One end with first resistor, the other end of clamp circuit are connected respectively for pole, the other end of first resistor and the 4th pipe of rectifier
Pin is connected, and the 3rd electric capacity is electrochemical capacitor, and the positive pole of the 3rd electric capacity is connected with the negative electrode of the second diode, the negative pole of the 3rd electric capacity
It is connected with ground signalling, the anode of the second diode is connected with the 7th pin of transformer, and the second electric capacity is ceramic condenser, and second
One end of resistance is connected with the 7th pin of transformer, and the other end of second resistance is connected with one end of the second electric capacity, the second electricity
The other end of appearance is connected with the negative electrode of the second diode, and the 12nd pin of transformer is connected with ground signalling, the first inductance
One end is connected with the negative electrode of the second diode, and the other end of the first inductance is connected with switched power output mouth, and the 4th electric capacity is
Electrochemical capacitor, the positive pole of the 4th electric capacity are connected with switched power output mouth, and the negative pole of the 4th electric capacity is connected with ground signalling, the
One end of three resistance is connected with switched power output mouth, and the other end of 3rd resistor is connected with ground signalling.
Preferably, the clamp circuit includes the first diode, the first voltage-regulator diode；The anode of first diode and institute
The three-prong for stating transformer is connected, and the negative electrode of the first diode is connected with the negative electrode of the first voltage-regulator diode, the first voltage stabilizing two
The anode of pole pipe is connected with the source electrode of the MOSFET pipes.
Preferably, the model TO-220 Schottky diodes of second diode.
The beneficial effects of the utility model are：
A kind of Switching Power Supply that protection circuit is absorbed containing MOSFET pipes and its clamper provided by the utility model, as long as making
With switch MOSFET common on existing market, low price pipes and clamp diode, it becomes possible to allow the switch of high frequency switch power
MOSFET pipes are in low level in grid G pole, and VDS is in high-tension state lower switch MOSFET pipes and is unlikely to damage, when
The drain D pole of switch MOSFET pipes is when reaching high potential, Switching Power Supply can also normal work, so as to ensure whole Switching Power Supply
Stability and reliability.
Brief description of the drawings
Fig. 1 is schematic diagram of the present utility model.
Embodiment
As shown in figure 1, a kind of Switching Power Supply containing MOSFET pipes Q1 and its absorption protection circuit, including rectifier BD1,
First electric capacity C1, transformer T1, clamp circuit, MOSFET pipes Q1, first resistor R1, the second diode D2, second resistance R2,
Two electric capacity C2, the 3rd electric capacity C3, the first inductance, the 4th electric capacity C4,3rd resistor R3, switched power output mouth；
Transformer T1 includes armature winding and secondary windings, and transformer T1 armature winding is connected to the first of transformer T1
Between pin and three-prong, transformer T1 secondary windings be connected to transformer T1 the 7th pin and the 12nd pin it
Between；
First electric capacity C1 is electrochemical capacitor, and rectifier BD1 the first pin is connected with the live wire of alternating current, rectifier BD1
Three-prong be connected with the zero line of alternating current, rectifier BD1 the second pin is connected with the first electric capacity C1 positive pole, first electricity
The negative pole for holding C1 is connected with rectifier BD1 the 4th pin；Transformer T1 the first pin is connected with the live wire of alternating current, transformation
The drain electrode with MOSFET pipes Q1, one end of clamp circuit are connected device T1 three-prong respectively, MOSFET pipes Q1 grid with just
String ripple signal is connected, and one end with first resistor R1, the other end of clamp circuit are connected MOSFET pipes Q1 source electrode respectively, and first
The resistance R1 other end is connected with rectifier TS1 the 4th pin, and the 3rd electric capacity C3 is electrochemical capacitor, the 3rd electric capacity C3 positive pole
Be connected with the second diode D2 negative electrode, the 3rd electric capacity C3 negative pole is connected with ground signalling, the second diode D2 anode with
Transformer T1 the 7th pin is connected, and the second electric capacity C2 is ceramic condenser, second resistance R2 one end and the 7th of transformer T1 the
Pin is connected, and the second resistance R2 other end is connected with the second electric capacity C2 one end, the second electric capacity C2 other end and the two or two
Pole pipe D2 negative electrode is connected, and transformer T1 the 12nd pin is connected with ground signalling, one end of the first inductance and the two or two pole
Pipe D2 negative electrode is connected, and the other end of the first inductance is connected with switched power output mouth, and the 4th electric capacity C4 is electrochemical capacitor, the
Four electric capacity C4 positive pole is connected with switched power output mouth, and the 4th electric capacity C4 negative pole is connected with ground signalling, 3rd resistor
R3 one end is connected with switched power output mouth, and the 3rd resistor R3 other end is connected with ground signalling.
Clamp circuit includes the first diode D1, the first voltage-regulator diode ZD1；First diode D1 anode and transformer
T1 three-prong is connected, and the first diode D1 negative electrode is connected with the first voltage-regulator diode ZD1 negative electrode, the pole of the first voltage stabilizing two
Pipe ZD1 anode is connected with MOSFET pipes Q1 source electrode.
Second diode D2 model TO-220 Schottky diodes.
In the moment of switch MOSFET pipes cut-off, because of the energy storage effect of transformer T1 armature winding, that is to say, that work as electricity
When the G poles of switch MOSFET pipes switch MOSFET pipes Q1 in road are in low level, switch MOSFET pipes Q1 is in cut-off
State, because of transformer T1 bleed off energy, a very high electricity can be formed in switch MOSFET pipes Q1 DS both ends mutation
Pressure, the clamper of this switch MOSFET pipe has now such as been added to absorb protection circuit, switch MOSFET pipes Q1 in the circuit of design
On the high voltage at the ends of DS bis- the first diode D1 and the first clamper voltage-regulator diode ZD1 will be promoted to turn on, as long as from closing
Suitable clamper voltage-regulator diode ZD1 (VZD1 is less than switch MOSFET pipes Q1 VDS), then the DS bis- on switch MOSFET pipes Q1
The voltage at end will clamper VZD1 rated voltage add the first diode D1 conducting voltage 0.3V-0.7V, i.e. VDS=
VD1+VZD1, and this voltage is held essentially constant, so it is achieved thereby that protection switch MOSFET pipes switch MOSFET pipes Q1
Purpose.
As long as use common, low price switch MOSFET pipes and clamp diode on existing market, it becomes possible to allow high frequency to open
The switch MOSFET pipes in powered-down source are in low level in grid G pole, and VDS is in high-tension state lower switch MOSFET pipes not
As for damage, when the drain D pole for switching MOSFET pipes reaches high potential, Switching Power Supply can also normal work, it is whole so as to ensure
The stability and reliability of individual Switching Power Supply.
Above-described embodiment and schema and non-limiting product form of the present utility model and style, any art
The appropriate change or modification that those of ordinary skill is done to it, all should be regarded as not departing from patent category of the present utility model.
Claims (3)
- A kind of 1. Switching Power Supply that protection circuit is absorbed containing MOSFET pipes and its clamper, it is characterised in that：Including rectifier, One electric capacity, transformer, clamp circuit, MOSFET pipes, first resistor, the second diode, second resistance, the second electric capacity, the 3rd electricity Appearance, the first inductance, the 4th electric capacity, 3rd resistor, switched power output mouth；Transformer includes armature winding and secondary windings, and the armature winding of transformer is connected to the first pin and the 3rd of transformer Between pin, the secondary windings of transformer is connected between the 7th pin of transformer and the 12nd pin；First electric capacity is electrochemical capacitor, and the first pin of rectifier is connected with the live wire of alternating current, the three-prong of rectifier with The zero line of alternating current is connected, and the second pin of rectifier is connected with the positive pole of the first electric capacity, the negative pole and rectifier of the first electric capacity The 4th pin be connected；First pin of transformer is connected with the live wire of alternating current, the three-prong of transformer respectively with The drain electrode of MOSFET pipes, one end of clamp circuit are connected, and the grid of MOSFET pipes is connected with sine wave signal, the source of MOSFET pipes One end with first resistor, the other end of clamp circuit are connected respectively for pole, the other end of first resistor and the 4th pipe of rectifier Pin is connected, and the 3rd electric capacity is electrochemical capacitor, and the positive pole of the 3rd electric capacity is connected with the negative electrode of the second diode, the negative pole of the 3rd electric capacity It is connected with ground signalling, the anode of the second diode is connected with the 7th pin of transformer, and the second electric capacity is ceramic condenser, and second One end of resistance is connected with the 7th pin of transformer, and the other end of second resistance is connected with one end of the second electric capacity, the second electricity The other end of appearance is connected with the negative electrode of the second diode, and the 12nd pin of transformer is connected with ground signalling, the first inductance One end is connected with the negative electrode of the second diode, and the other end of the first inductance is connected with switched power output mouth, and the 4th electric capacity is Electrochemical capacitor, the positive pole of the 4th electric capacity are connected with switched power output mouth, and the negative pole of the 4th electric capacity is connected with ground signalling, the One end of three resistance is connected with switched power output mouth, and the other end of 3rd resistor is connected with ground signalling.
- 2. a kind of Switching Power Supply that protection circuit is absorbed containing MOSFET pipes and its clamper according to claim 1, it is special Sign is：The clamp circuit includes the first diode, the first voltage-regulator diode；The anode of first diode and the transformer Three-prong be connected, the negative electrode of the first diode is connected with the negative electrode of the first voltage-regulator diode, the sun of the first voltage-regulator diode Pole is connected with the source electrode of the MOSFET pipes.
- 3. a kind of Switching Power Supply that protection circuit is absorbed containing MOSFET pipes and its clamper according to claim 1, it is special Sign is：The model TO-220 Schottky diodes of second diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721069171.5U CN207150417U (en) | 2017-08-24 | 2017-08-24 | A kind of Switching Power Supply that protection circuit is absorbed containing MOSFET pipes and its clamper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721069171.5U CN207150417U (en) | 2017-08-24 | 2017-08-24 | A kind of Switching Power Supply that protection circuit is absorbed containing MOSFET pipes and its clamper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207150417U true CN207150417U (en) | 2018-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721069171.5U Expired - Fee Related CN207150417U (en) | 2017-08-24 | 2017-08-24 | A kind of Switching Power Supply that protection circuit is absorbed containing MOSFET pipes and its clamper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207150417U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113595047A (en) * | 2021-08-20 | 2021-11-02 | 南通大学 | Passive clamping circuit for online measurement of conduction voltage drop of power transistor |
-
2017
- 2017-08-24 CN CN201721069171.5U patent/CN207150417U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113595047A (en) * | 2021-08-20 | 2021-11-02 | 南通大学 | Passive clamping circuit for online measurement of conduction voltage drop of power transistor |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180327 Termination date: 20180824 |
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| CF01 | Termination of patent right due to non-payment of annual fee |