CN207910695U - A kind of circuit of synchronous rectification - Google Patents
A kind of circuit of synchronous rectification Download PDFInfo
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- CN207910695U CN207910695U CN201820427335.5U CN201820427335U CN207910695U CN 207910695 U CN207910695 U CN 207910695U CN 201820427335 U CN201820427335 U CN 201820427335U CN 207910695 U CN207910695 U CN 207910695U
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Abstract
The utility model discloses a kind of circuit of synchronous rectification, including first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance and the 9th resistance；First capacitance, the second capacitance, third capacitance, the 4th capacitance, the 5th capacitance, the 6th capacitance, the 7th capacitance and the 8th capacitance；First field-effect tube, the second field-effect tube, the first bidirectional trigger diode, the second bidirectional trigger diode, the first inductance, the second inductance and transformer；A kind of circuit of synchronous rectification of the utility model replaces rectifier diode using the lower field-effect tube of resistance value, and keeps grid voltage synchronous with the phase holding of voltage is rectified, and completes synchronous rectification, to achieve the purpose that reduce rectifier loss.
Description
Technical field
The utility model is related to rectification circuit more particularly to a kind of circuit of synchronous rectification.
Background technology
The development of electronic technology so that the operating voltage of circuit is lower and lower, electric current is increasing.Low voltage operating is advantageous
In the overall power consumption of reduction circuit, but new problem is also proposed to Power Management Design.The loss of Switching Power Supply is mainly by 3
It is grouped as：The loss of power switch tube, the loss of high frequency transformer, the loss of output end rectifying tube.It is defeated in low-voltage, high current
In the case of going out, the conduction voltage drop of rectifier diode is higher, and the loss of output end rectifying tube is especially prominent, using the two of low pressure drop
Pole pipe, will produce the pressure drop of about 0.6V, this results in rectifier loss to increase, and power-efficient reduces.
Utility model content
The purpose of this utility model is that solve the above-mentioned problems and provides a kind of circuit of synchronous rectification.
The utility model is achieved through the following technical solutions above-mentioned purpose：
A kind of circuit of synchronous rectification, including,
First resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th electricity
Resistance and the 9th resistance；
First capacitance, the second capacitance, third capacitance, the 4th capacitance, the 5th capacitance, the 6th capacitance, the 7th capacitance and the 8th
Capacitance；
First field-effect tube, the second field-effect tube, the first bidirectional trigger diode, the second bidirectional trigger diode, first
Inductance, the second inductance and transformer；
Two main output ends of the transformer connect alternating current, the first secondary output end of the transformer with it is described
The first of the first end of second capacitance, the first end of the 6th resistance, the first end of second inductance, the first resistor
The drain electrode at end, the first end of second capacitance, the first end of the 6th resistance and the field-effect tube is electrically connected, and described the
The second end of one resistance is electrically connected with the first end of first capacitance, the second subprime output end of the transformer and described the
The first end of nine resistance, the draining of second field-effect tube, the first end of the 4th resistance and the third capacitance
One end is electrically connected, and the second end of the 9th resistance is electrically connected with the first end of the 4th capacitance, and the of the 4th resistance
The second end of two ends and the third capacitance, the first end of the second resistance, the first end of the 3rd resistor and described the
The first end of one bidirectional trigger diode is electrically connected, the grid electricity of the second end of the second resistance and first field-effect tube
Connection, the second end of second capacitance is electrically connected with the first end of the 5th resistance, the second end of the 5th resistance and
The first end of 7th resistance, the second end of the 6th resistance, the first end of the 8th resistance and described second two-way
The first end of diac is electrically connected, and the second end of the 7th resistance is electrically connected with the grid of second field-effect tube,
First end, the first end of the 6th capacitance and first inductance of the second end of second inductance and the 5th capacitance
First end electrical connection, the first end of the second end of first inductance and the 7th capacitance and the first of the 8th capacitance
End electrical connection and be the first output end, the second end of the source electrode of second field-effect tube and the 4th capacitance, the described 8th
The second end of resistance, the second end of second bidirectional trigger diode, the second end of first bidirectional trigger diode, institute
State the second end of 3rd resistor, the source electrode of the second end of first capacitance and first field-effect tube, the 5th capacitance
Second end, second end, the second end of the 7th capacitance and the second end of the 8th capacitance of the 6th capacitance and be
Second output terminal.
Specifically, the resistance value of the first resistor is 330 Ω, and the resistance value of the second resistance is 1K Ω, the third electricity
The resistance value of resistance is 500 Ω, and the resistance value of the 4th resistance is 2K Ω, and the resistance value of the 5th resistance is 500 Ω, the 6th electricity
The resistance value of resistance is 1K Ω, and the resistance value of the 7th resistance is 500 Ω, and the resistance value of the 8th resistance is 1K Ω, the 9th electricity
The resistance value of resistance is 330 Ω；
The capacitance of first capacitance is 0.02 μ F, and the capacitance of second capacitance is 300pF, the appearance of the third capacitance
Value is 0.05 μ F, and the capacitance of the 4th capacitance is 400pF, the capacitance of the 5th capacitance is 0.03 μ F, the 6th capacitance
Capacitance be 0.04 μ F, the capacitance of the 7th capacitance is 0.03 μ F and the capacitance of the 8th capacitance is 0.04pF；
The model 06N03LA of first field-effect tube, the model 09N03LA of second field-effect tube, it is described
The model DB3 of first bidirectional trigger diode, the model DB3 of second bidirectional trigger diode, first inductance
Inductance value be 0.1H, the inductance value of second inductance is 0.2H.
The beneficial effects of the utility model are：
A kind of circuit of synchronous rectification of the utility model replaces rectifier diode using the lower field-effect tube of resistance value, and makes grid
Pole tension is synchronous with the phase holding of voltage is rectified, and completes synchronous rectification, to achieve the purpose that reduce rectifier loss.
Description of the drawings
Fig. 1 is a kind of circuit diagram of circuit of synchronous rectification described in the utility model.
Specific implementation mode
The utility model is described in further detail below in conjunction with the accompanying drawings：
This technology, which essentially consists in, protects the circuit structure, and the concrete model to each electronic component and resistance R, capacitance
Deng parameter carried out detailed regulation, those skilled in the art can pass through circuit shown in FIG. 1 in its knowledge
Figure is attached each electronic component, to realize that this technology needs purpose to be achieved, that is, reduces rectifier loss；And should be electricity
Line structure, as long as each electronic component, which is connected to become a complete circuit, by conducting wire can be thus achieved its function, therefore
No longer need additional specific product structure.
As shown in Figure 1, a kind of circuit of synchronous rectification of the utility model, including,
First resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6,
Seven resistance R7, the 8th resistance R8 and the 9th resistance R9；
First capacitance C1, the second capacitance C2, third capacitance C3, the 4th capacitance C4, the 5th capacitance C5, the 6th capacitance C6,
Seven capacitance C7 and the 8th capacitance C8；
First field-effect tube Q1, the second field-effect tube Q2, the first bidirectional trigger diode Z1, the second bidirectional trigger diode
Z2, the first inductance L1, the second inductance L2 and transformer T1；
Two main output ends of transformer T1 connect alternating current, the first secondary output end and the second capacitance of transformer T1
The first end of C2, the first end of the 6th resistance R6, the first end of the second inductance L2, the first end of first resistor R1, the second capacitance
The drain electrode of the first end of C2, the first end of the 6th resistance R6 and field-effect tube is electrically connected, the second end of first resistor R1 and first
The first end of capacitance C1 is electrically connected, first end, the second field-effect of the second subprime output end and the 9th resistance R9 of transformer T1
The first end of the drain electrode of pipe Q2, the first end of the 4th resistance R4 and third capacitance C3 is electrically connected, the second end of the 9th resistance R9 with
The first end of 4th capacitance C4 is electrically connected, the second end of the 4th resistance R4 and the second end of third capacitance C3, second resistance R2
The first end of first end, the first end of 3rd resistor R3 and the first bidirectional trigger diode Z1 is electrically connected, and the of second resistance R2
Two ends are electrically connected with the grid of the first field-effect tube Q1, and the second end and the first end of the 5th resistance R5 of the second capacitance C2 are electrically connected
Connect, the second end of the 5th resistance R5 and the first end of the 7th resistance R7, the second end of the 6th resistance R6, the 8th resistance R8 first
The first end of end and the second bidirectional trigger diode Z2 are electrically connected, the grid of the second end of the 7th resistance R7 and the second field-effect tube Q2
Pole is electrically connected, the second end of the second inductance L2 and the first end of the 5th capacitance C5, the first end and the first inductance of the 6th capacitance C6
The first end of L1 is electrically connected, the second end of the first inductance L1 and the first end of the 7th capacitance C7 and the first end of the 8th capacitance C8 electricity
Connection and be the first output end, the second of the source electrode of the second field-effect tube Q2 and the second end of the 4th capacitance C4, the 8th resistance R8
End, the second end of the second bidirectional trigger diode Z2, the second end of the first bidirectional trigger diode Z1,3rd resistor R3 second
End, the second end of the first capacitance C1 and the source electrode of the first field-effect tube Q1, the second end of the 5th capacitance C5, the 6th capacitance C6 the
Two ends, the second end of the 7th capacitance C7 and the 8th capacitance C8 second end and be second output terminal.
The resistance value of first resistor R1 is 330 Ω, and the resistance value of second resistance R2 is 1K Ω, and the resistance value of 3rd resistor R3 is 500
The resistance value of Ω, the 4th resistance R4 are 2K Ω, and the resistance value of the 5th resistance R5 is 500 Ω, and the resistance value of the 6th resistance R6 is 1K Ω, the 7th
The resistance value of resistance R7 is 500 Ω, and the resistance value of the 8th resistance R8 is 1K Ω, and the resistance value of the 9th resistance R9 is 330 Ω；First capacitance C1
Capacitance be 0.02 μ F, the second capacitance C2 capacitance be 300pF, the capacitance of third capacitance C3 is 0.05 μ F, the 4th capacitance C4's
Capacitance is 400pF, the capacitance of the 5th capacitance C5 is 0.03 μ F, and the capacitance of the 6th capacitance C6 is 0.04 μ F, the appearance of the 7th capacitance C7
Value is that the capacitance of 0.03 μ F and the 8th capacitance C8 is 0.04pF；The model 06N03LA of first field-effect tube Q1, the second field-effect
The model DB3 of the model 09N03LA, the first bidirectional trigger diode Z1 of pipe Q2, the type of the second bidirectional trigger diode Z2
Number it is DB3, the inductance value of the first inductance L1 is 0.1H, and the inductance value of the second inductance L2 is 0.2H.
A kind of operation principle of circuit of synchronous rectification of the utility model is as follows：
When the first output end of secondary of transformer T1 is timing, electric current is through the second capacitance C2, the 5th resistance R5, the 6th resistance
R6, the 7th resistance R7 make the second field-effect tube Q2 conductings, circuit constitute circuit, and the first field-effect tube Q1 is due to being in reverse-biased
And end.When the secondary second output terminal of transformer T1 is timing, electric current makes the through third capacitance C3, low-lying place's resistance, resistance
One field-effect tube Q1 conducting, the second field-effect tube Q2 is in reverse-biased and end.Second inductance L2 is afterflow inductance, the 6th capacitance
C6, the first inductance L1 and the 7th capacitance C7 form pi type filter, first resistor R1, the first capacitance C1, the 9th resistance R9 and the 4th
Capacitance C4 forms Despiking circuit.To keep grid voltage synchronous with the phase holding of voltage is rectified, synchronous rectification is completed, from
And achieve the purpose that reduce rectifier loss.
The technical solution of the utility model is not limited to the limitation of above-mentioned specific embodiment, every skill according to the present utility model
The technology deformation that art scheme is made, each falls within the scope of protection of the utility model.
Claims (2)
1. a kind of circuit of synchronous rectification, it is characterised in that：Including,
First resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance and
9th resistance；
First capacitance, the second capacitance, third capacitance, the 4th capacitance, the 5th capacitance, the 6th capacitance, the 7th capacitance and the 8th capacitance；
First field-effect tube, the second field-effect tube, the first bidirectional trigger diode, the second bidirectional trigger diode, the first inductance,
Second inductance and transformer；
Two main output ends of the transformer connect alternating current, the first secondary output end of the transformer and described second
The first end of capacitance, the first end of the 6th resistance, the first end of second inductance, the first end of the first resistor,
The drain electrode of the first end of second capacitance, the first end of the 6th resistance and the field-effect tube is electrically connected, and described first
The second end of resistance is electrically connected with the first end of first capacitance, the second subprime output end of the transformer and the described 9th
The first end of resistance, the draining of second field-effect tube, the first end of the 4th resistance and the third capacitance first
End electrical connection, the second end of the 9th resistance are electrically connected with the first end of the 4th capacitance, and the second of the 4th resistance
Second end, the first end of the second resistance, the first end of the 3rd resistor and described first at end and the third capacitance
The first end of bidirectional trigger diode is electrically connected, and the second end of the second resistance and the grid of first field-effect tube are electrically connected
It connects, the second end of second capacitance is electrically connected with the first end of the 5th resistance, the second end of the 5th resistance and institute
State the first end of the 7th resistance, the second end of the 6th resistance, the first end of the 8th resistance and it is described second it is two-way touch
The first end electrical connection of diode is sent out, the second end of the 7th resistance is electrically connected with the grid of second field-effect tube, institute
State the second end of the second inductance and first end of the 5th capacitance, the first end of the 6th capacitance and first inductance
First end is electrically connected, the first end of the second end of first inductance and the first end and the 8th capacitance of the 7th capacitance
It is electrically connected and is the first output end, second end, the 8th electricity of the source electrode of second field-effect tube and the 4th capacitance
It is the second end of resistance, the second end of second bidirectional trigger diode, the second end of first bidirectional trigger diode, described
The second end of 3rd resistor, the source electrode of the second end of first capacitance and first field-effect tube, the 5th capacitance
Second end, the second end of the 6th capacitance, the second end of the second end of the 7th capacitance and the 8th capacitance and be the
Two output ends.
2. circuit of synchronous rectification according to claim 1, it is characterised in that：The resistance value of the first resistor is 330 Ω, institute
The resistance value for stating second resistance is 1K Ω, and the resistance value of the 3rd resistor is 500 Ω, and the resistance value of the 4th resistance is 2K Ω, institute
The resistance value for stating the 5th resistance is 500 Ω, and the resistance value of the 6th resistance is 1K Ω, and the resistance value of the 7th resistance is 500 Ω, institute
The resistance value for stating the 8th resistance is 1K Ω, and the resistance value of the 9th resistance is 330 Ω；
The capacitance of first capacitance is 0.02 μ F, and the capacitance of second capacitance is 300pF, and the capacitance of the third capacitance is
0.05 μ F, the capacitance of the 4th capacitance is 400pF, the capacitance of the 5th capacitance is 0.03 μ F, the appearance of the 6th capacitance
Value is 0.04 μ F, and the capacitance of the 7th capacitance is 0.03 μ F and the capacitance of the 8th capacitance is 0.04pF；
The model 06N03LA of first field-effect tube, the model 09N03LA of second field-effect tube, described first
The model DB3 of bidirectional trigger diode, the model DB3 of second bidirectional trigger diode, the electricity of first inductance
Sensibility reciprocal is 0.1H, and the inductance value of second inductance is 0.2H.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820427335.5U CN207910695U (en) | 2018-03-28 | 2018-03-28 | A kind of circuit of synchronous rectification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820427335.5U CN207910695U (en) | 2018-03-28 | 2018-03-28 | A kind of circuit of synchronous rectification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207910695U true CN207910695U (en) | 2018-09-25 |
Family
ID=63558468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820427335.5U Expired - Fee Related CN207910695U (en) | 2018-03-28 | 2018-03-28 | A kind of circuit of synchronous rectification |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207910695U (en) |
-
2018
- 2018-03-28 CN CN201820427335.5U patent/CN207910695U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180925 Termination date: 20200328 |