CN206060536U - He controls formula light-coupled isolation self-powered BOOST type synchronous rectified powers - Google Patents
He controls formula light-coupled isolation self-powered BOOST type synchronous rectified powers Download PDFInfo
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- CN206060536U CN206060536U CN201621076964.5U CN201621076964U CN206060536U CN 206060536 U CN206060536 U CN 206060536U CN 201621076964 U CN201621076964 U CN 201621076964U CN 206060536 U CN206060536 U CN 206060536U
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- switching tube
- source
- biasing resistor
- optocoupler
- synchronous rectifier
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The utility model discloses it is a kind of he control formula light-coupled isolation self-powered BOOST type synchronous rectified powers, including main circuit unit and control circuit unit two large divisions, described main circuit unit includes DC source VS, switching tube SW1, synchronous rectifier SR1, inductance L1, filter capacitor C1 and load RL, wherein switching tube SW1 is managed for N-channel MOS FET, synchronous rectifier SR1 is managed for P-channel MOSFET, and contains body diode inside which；Control circuit of the described control circuit unit comprising pulse driver PWM_DRIVE, the control circuit of switching tube SW1 and synchronous rectifier SR1.This utility model design is simple, rational in infrastructure, it is convenient to build, it is not only able to the defect for overcoming existing BOOST types synchronous rectified power versatility not strong, special synchronous rectification is not needed to control to drive IC, so that the circuit of relevant drive level conversion is relatively easy, both it had been adapted to the BOOST type synchronous rectified powers of below driving voltage 12V, had been adapted to the BOOST type synchronous rectified powers of more than driving voltage 12V again.
Description
Technical field
This utility model is related to synchronous rectified power, more specifically, is that one kind is related to him and controls formula light-coupled isolation self-powered
BOOST type synchronous rectified powers.
Background technology
Synchronous rectification is exactly to replace the fast recovery in switch converters using the power MOSFET tube of low on-resistance
Diode, plays rectifier tube, so as to reducing rectifier loss and putting forward efficient purpose.Existed using synchronous rectification
High-current switch power supply application is wider, but there are problems and need further to be solved：
(1) the generally running voltage of low-voltage, high-current BOOST type synchronous rectified powers is in below 48V, but power
The driving voltage of MOSFET pipes is typically in below 20V, in addition, the loss of its driving voltage is again with driving voltage square into just
Than, so synchronous rectification is higher in the ratio occupied of field of switch power of below driving voltage 12V at this stage, so that
The BOOST type synchronous rectified powers field of the low-voltage, high-current of more than driving voltage 12V is difficult to give play to synchronous rectification
Advantage；
(2) type of drive of synchronous rectification can be divided into two kinds of forms of self-powered and outer drive, comparatively, although self-driving type is electric
Road is simple, cost savings, but is because driving voltage and the bad arrangement of sequential, has that drive waveforms are of low quality, and dead band is bad
The defect of control；Although external-drive overcomes the defect of self-powered, but drives IC using special control more than its drive circuit, and
The corresponding detection in periphery and drive level converting circuit structure are relative complex, relatively costly.
The content of the invention
In view of this, this utility model aim to provide it is a kind of he control formula light-coupled isolation self-powered BOOST type synchronous rectified powers,
The defect that existing BOOST types synchronous rectified power versatility can be overcome not strong.
In order to realize the purpose of foregoing invention, this utility model specifically provides him, and to control formula light-coupled isolation self-powered BOOST types same
Walking rectifier power source technical scheme is：
Including main circuit unit and control circuit unit two large divisions.
(1) main circuit unit described in includes DC source VS, switching tube SW1, synchronous rectifier SR1, inductance L1, filtering
Electric capacity C1 and load RL, wherein switching tube SW1 are managed for N-channel MOS FET, and synchronous rectifier SR1 is managed for P-channel MOSFET, and
Contain body diode inside which, the positive pole of DC source VS is connected with one end of inductance L1, the other end and switching tube of inductance L1
The drain electrode of SW1 is connected with the drain electrode of synchronous rectifier SR1, and the source electrode of switching tube SW1 is connected with the negative pole of DC source VS, filtering
Electric capacity C1 with load RL it is in parallel, its one end in parallel is connected with the source electrode of synchronous rectifier SR1, and its other end in parallel with it is straight
The negative pole of stream power supply VS is connected；
(2) the control circuit unit described in includes pulse driver PWM_DRIVE, the control circuit of switching tube SW1 and same
The control circuit of step rectifier tube SR1, the wherein control circuit of switching tube SW1 include biasing resistor R3, biasing resistor R4, current limliting again
Resistance R5, switching tube Q1 and optocoupler U1, the control circuit of synchronous rectifier SR1 include biasing resistor R1, biasing resistor R2 again, divide
Piezoresistance R6, current-limiting resistance R7, switching tube Q2 and optocoupler U2, further, switching tube Q1 and switching tube Q2 are N-channel MOS FET
Pipe；
The pulse output end of pulse driver PWM_DRIVE is divided to the grid of two branch roads, first branch road and switching tube Q1 again
Extremely it is connected, the source electrode of switching tube Q1 is connected with the negative pole of the DC source VS, drain electrode and the optocoupler U1 input stages of switching tube Q1
Light-emitting diodes tube cathode be connected, the light-emitting diodes tube anode of optocoupler U1 input stages is connected with one end of current-limiting resistance R5, current limliting
The other end of resistance R5 is connected with the colelctor electrode of the positive pole and optocoupler U1 output stages of the DC source VS, optocoupler U1 output stages
Emitter stage is connected with one end of biasing resistor R3, the other end of biasing resistor R3 and the grid of switching tube SW1 and biasing resistor R4
One end be connected, the other end of biasing resistor R4 is connected with the source electrode of switching tube SW1；
The Article 2 branch road of the pulse output end of pulse driver PWM_DRIVE is connected with the grid of switching tube Q2, switch
The source electrode of pipe Q2 is connected with the negative pole of the DC source VS, and the drain electrode of switching tube Q2 is electric with one end of divider resistance R6 and current limliting
One end of resistance R7 is connected, and the other end of divider resistance R6 is connected with the positive pole of the DC source VS, and current-limiting resistance R7's is another
End is connected with the light-emitting diodes tube anode of optocoupler U2 input stages, light-emitting diodes tube cathode and the unidirectional current of optocoupler U2 input stages
The negative pole of source VS is connected, and the colelctor electrode of optocoupler U2 output stages is connected with one end of biasing resistor R1, the other end of biasing resistor R1
It is connected with one end of the grid and biasing resistor R2 of synchronous rectifier SR1, the other end and the synchronous rectifier SR1 of biasing resistor R2
Source electrode be connected, the emitter stage of optocoupler U2 output stages is connected with the negative pole of the DC source VS.
Preferably, in the two ends shunt capacitance C2 of the biasing resistor R2 or described biasing resistor R4, it is beneficial to regulation institute
State the Dead Time between switching tube SW1 and the synchronous rectifier SR1.
Preferably, in the two ends shunt regulator diode DW1 of the biasing resistor R4, it is beneficial to the switching tube SW1's
Voltage amplitude limit between grid and source electrode, the i.e. negative electrode of Zener diode DW1 are connected with the grid of switching tube SW1, two pole of voltage stabilizing
The anode of pipe DW1 is connected with the source electrode of switching tube SW1；
In the two ends shunt regulator diode DW2 of the biasing resistor R2, it is beneficial to the grid of the synchronous rectifier SR1
Voltage amplitude limit between source electrode, the i.e. negative electrode of Zener diode DW2 are connected with the source electrode of synchronous rectifier SR1, two pole of voltage stabilizing
The anode of pipe DW2 is connected with the grid of synchronous rectifier SR1.
The beneficial effects of the utility model are to provide him and control formula light-coupled isolation self-powered BOOST type synchronous rectified powers, design
Simply, rational in infrastructure, structure is convenient, is not only able to the defect for overcoming existing BOOST types synchronous rectified power versatility not strong,
Do not need special synchronous rectification to control to drive IC so that the circuit of relevant drive level conversion is relatively easy, be both adapted to drive
The BOOST type synchronous rectified powers of below voltage 12V, are adapted to the BOOST type synchronous rectified powers of more than driving voltage 12V again.
Description of the drawings
In order to be illustrated more clearly that this utility model embodiment or technical scheme, embodiment or technical scheme will be retouched below
Needed for stating, accompanying drawing to be used is briefly described, it should be apparent that, drawings in the following description are only of the present utility model
The explanation of more typical example structure composition or circuit diagram, for those of ordinary skill in the art, is not paying creativeness
On the premise of work, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 be this utility model he control a kind of canonical schema of formula light-coupled isolation self-powered BOOST type synchronous rectified powers.
Fig. 2 be this utility model he control the additional dead band of formula light-coupled isolation self-powered BOOST type synchronous rectified powers and adjust electric capacity
A kind of canonical schema.
Fig. 3 be this utility model he control the additional Zener diode of formula light-coupled isolation self-powered BOOST type synchronous rectified powers
A kind of canonical schema.
Fig. 4 be this utility model he control the additional dead band of formula light-coupled isolation self-powered BOOST type synchronous rectified powers and adjust electric capacity
With a kind of canonical schema of Zener diode.
Specific embodiment
It is to make purpose, technical scheme and the advantage of this utility model embodiment clearer, new below in conjunction with this practicality
Accompanying drawing in type embodiment, is clearly and completely described to this utility model technology composition, technical scheme and embodiment, shows
So, described embodiment is only a part of embodiment of the present utility model, rather than the embodiment of whole.Based on this practicality
Embodiment in new, other enforcements that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to the scope of this utility model protection.
This utility model is further illustrated in conjunction with the drawings and specific embodiments.
As shown in Figure 1, be this utility model he control a kind of typical case of formula light-coupled isolation self-powered BOOST types synchronous rectified power
Schematic diagram, including main circuit unit and control circuit unit two large divisions.
(1) main circuit unit described in includes DC source VS, switching tube SW1, synchronous rectifier SR1, inductance L1, filtering
Electric capacity C1 and load RL, wherein switching tube SW1 are managed for N-channel MOS FET, and synchronous rectifier SR1 is managed for P-channel MOSFET, and
Contain body diode inside which, the positive pole of DC source VS is connected with one end of inductance L1, the other end and switching tube of inductance L1
The drain electrode of SW1 is connected with the drain electrode of synchronous rectifier SR1, and the source electrode of switching tube SW1 is connected with the negative pole of DC source VS, filtering
Electric capacity C1 with load RL it is in parallel, its one end in parallel is connected with the source electrode of synchronous rectifier SR1, and its other end in parallel with it is straight
The negative pole of stream power supply VS is connected；
(2) the control circuit unit described in includes pulse driver PWM_DRIVE, the control circuit of switching tube SW1 and same
The control circuit of step rectifier tube SR1, the wherein control circuit of switching tube SW1 include biasing resistor R3, biasing resistor R4, current limliting again
Resistance R5, switching tube Q1 and optocoupler U1, the control circuit of synchronous rectifier SR1 include biasing resistor R1, biasing resistor R2 again, divide
Piezoresistance R6, current-limiting resistance R7, switching tube Q2 and optocoupler U2, further, switching tube Q1 and switching tube Q2 are N-channel MOS FET
Pipe；
The pulse output end of pulse driver PWM_DRIVE is divided to the grid of two branch roads, first branch road and switching tube Q1 again
Extremely it is connected, the source electrode of switching tube Q1 is connected with the negative pole of the DC source VS, drain electrode and the optocoupler U1 input stages of switching tube Q1
Light-emitting diodes tube cathode be connected, the light-emitting diodes tube anode of optocoupler U1 input stages is connected with one end of current-limiting resistance R5, current limliting
The other end of resistance R5 is connected with the colelctor electrode of the positive pole and optocoupler U1 output stages of the DC source VS, optocoupler U1 output stages
Emitter stage is connected with one end of biasing resistor R3, the other end of biasing resistor R3 and the grid of switching tube SW1 and biasing resistor R4
One end be connected, the other end of biasing resistor R4 is connected with the source electrode of switching tube SW1；
The Article 2 branch road of the pulse output end of pulse driver PWM_DRIVE is connected with the grid of switching tube Q2, switch
The source electrode of pipe Q2 is connected with the negative pole of the DC source VS, and the drain electrode of switching tube Q2 is electric with one end of divider resistance R6 and current limliting
One end of resistance R7 is connected, and the other end of divider resistance R6 is connected with the positive pole of the DC source VS, and current-limiting resistance R7's is another
End is connected with the light-emitting diodes tube anode of optocoupler U2 input stages, light-emitting diodes tube cathode and the unidirectional current of optocoupler U2 input stages
The negative pole of source VS is connected, and the colelctor electrode of optocoupler U2 output stages is connected with one end of biasing resistor R1, the other end of biasing resistor R1
It is connected with one end of the grid and biasing resistor R2 of synchronous rectifier SR1, the other end and the synchronous rectifier SR1 of biasing resistor R2
Source electrode be connected, the emitter stage of optocoupler U2 output stages is connected with the negative pole of the DC source VS.
As shown in Figure 2, be this utility model he control the additional dead band of formula light-coupled isolation self-powered BOOST type synchronous rectified powers
A kind of canonical schema of electric capacity is adjusted, and is formula light-coupled isolation self-powered BOOST type synchronous rectified powers to be controlled in he described in accompanying drawing 1
On the basis of, in the two ends shunt capacitance C2 of the biasing resistor R4, it is beneficial to the regulation switching tube SW1 and the synchronous rectification
Dead Time between pipe SR1.
As shown in Figure 3, be this utility model he control the additional voltage stabilizing of formula light-coupled isolation self-powered BOOST type synchronous rectified powers
A kind of canonical schema of diode, is to control formula light-coupled isolation self-powered BOOST type synchronous rectified power bases in he described in accompanying drawing 1
On plinth, in the two ends shunt regulator diode DW1 of the biasing resistor R4, it is beneficial to the grid and source electrode of the switching tube SW1
Between voltage amplitude limit, i.e. the negative electrode of Zener diode DW1 is connected with the grid of switching tube SW1, the anode of Zener diode DW1
It is connected with the source electrode of switching tube SW1；
In the two ends shunt regulator diode DW2 of the biasing resistor R2, it is beneficial to the grid of the synchronous rectifier SR1
Voltage amplitude limit between source electrode, the i.e. negative electrode of Zener diode DW2 are connected with the source electrode of synchronous rectifier SR1, two pole of voltage stabilizing
The anode of pipe DW2 is connected with the grid of synchronous rectifier SR1.
As shown in Figure 4, be this utility model he control the additional dead band of formula light-coupled isolation self-powered BOOST type synchronous rectified powers
A kind of canonical schema of electric capacity and Zener diode is adjusted, is the integrated application in accompanying drawing 1, accompanying drawing 2 and accompanying drawing 3, i.e., attached
On the basis of he described in Fig. 1 controls formula light-coupled isolation self-powered BOOST type synchronous rectified powers, at the two ends of the biasing resistor R4 simultaneously
Connection Zener diode DW1 and electric capacity C2, it is not only dead between the switching tube SW1 and synchronous rectifier SR1 beneficial to adjusting
Area's time, and beneficial to the voltage amplitude limit between the switching tube SW1 grids and source electrode, the i.e. negative electrode of Zener diode DW1 with
The grid of switching tube SW1 is connected, and the anode of Zener diode DW1 is connected with the source electrode of switching tube SW1；
In the two ends shunt regulator diode DW2 of the biasing resistor R2, it is beneficial to the grid of the synchronous rectifier SR1
Voltage amplitude limit between source electrode, the i.e. negative electrode of Zener diode DW2 are connected with the source electrode of synchronous rectifier SR1, two pole of voltage stabilizing
The anode of pipe DW2 is connected with the grid of synchronous rectifier SR1.
The above, is only preferred embodiment of the present utility model, not makees any formal to this utility model
Restriction.If various changes and modifications are carried out to this utility model embodiment, but still in spirit of the present utility model and original
Within then, should be included within claims of the present utility model.
Claims (3)
1. he controls formula light-coupled isolation self-powered BOOST type synchronous rectified powers, including main circuit unit and control circuit unit two it is big
Part, is characterized in that：
(1) main circuit unit described in includes DC source VS, switching tube SW1, synchronous rectifier SR1, inductance L1, filter capacitor
C1 and load RL, wherein switching tube SW1 are managed for N-channel MOS FET, and synchronous rectifier SR1 is managed for P-channel MOSFET, and in which
Body diode is contained in portion, and the positive pole of DC source VS is connected with one end of inductance L1, and the other end of inductance L1 is with switching tube SW1's
Drain electrode is connected with the drain electrode of synchronous rectifier SR1, and the source electrode of switching tube SW1 is connected with the negative pole of DC source VS, filter capacitor
C1 is in parallel with load RL, and its one end in parallel is connected with the source electrode of synchronous rectifier SR1, and its other end in parallel and unidirectional current
The negative pole of source VS is connected；
(2) the control circuit unit described in is whole comprising pulse driver PWM_DRIVE, the control circuit of switching tube SW1 and synchronization
The control circuit of flow tube SR1, the wherein control circuit of switching tube SW1 include biasing resistor R3, biasing resistor R4, current-limiting resistance again
R5, switching tube Q1 and optocoupler U1, the control circuit of synchronous rectifier SR1 is again comprising biasing resistor R1, biasing resistor R2, partial pressure electricity
Resistance R6, current-limiting resistance R7, switching tube Q2 and optocoupler U2, further, switching tube Q1 and switching tube Q2 is N-channel MOS FET pipes；
The pulse output end of pulse driver PWM_DRIVE is divided to two branch roads again, the grid phase of first branch road and switching tube Q1
Even, the source electrode of switching tube Q1 is connected with the negative pole of the DC source VS, the drain electrode of switching tube Q1 and optocoupler U1 input stages
Optical diode negative electrode is connected, and the light-emitting diodes tube anode of optocoupler U1 input stages is connected with one end of current-limiting resistance R5, current-limiting resistance
The other end of R5 is connected with the colelctor electrode of the positive pole and optocoupler U1 output stages of the DC source VS, the transmitting of optocoupler U1 output stages
Pole is connected with one end of biasing resistor R3, and the one of the other end of biasing resistor R3 and the grid of switching tube SW1 and biasing resistor R4
End is connected, and the other end of biasing resistor R4 is connected with the source electrode of switching tube SW1；
The Article 2 branch road of the pulse output end of pulse driver PWM_DRIVE is connected with the grid of switching tube Q2, switching tube Q2
Source electrode be connected with the negative pole of the DC source VS, the drain electrode of switching tube Q2 and one end of divider resistance R6 and current-limiting resistance R7
One end be connected, the other end of divider resistance R6 is connected with the positive pole of the DC source VS, the other end of current-limiting resistance R7 and
The light-emitting diodes tube anode of optocoupler U2 input stages is connected, the light-emitting diodes tube cathode of optocoupler U2 input stages and the DC source VS
Negative pole be connected, the colelctor electrode of optocoupler U2 output stages is connected with one end of biasing resistor R1, the other end of biasing resistor R1 with it is same
The grid of step rectifier tube SR1 is connected with one end of biasing resistor R2, the other end of biasing resistor R2 and the source of synchronous rectifier SR1
Extremely it is connected, the emitter stage of optocoupler U2 output stages is connected with the negative pole of the DC source VS.
2. he controls formula light-coupled isolation self-powered BOOST type synchronous rectified powers according to claim 1, it is characterized in that：Described
The two ends shunt capacitance C2 of biasing resistor R2 or described biasing resistor R4, is beneficial to the regulation switching tube SW1 and the synchronization
Dead Time between rectifier tube SR1.
3. according to claim 1 or claim 2, he controls formula light-coupled isolation self-powered BOOST type synchronous rectified powers, and which is special
Levying is：
In the two ends shunt regulator diode DW1 of the biasing resistor R4, be beneficial to the switching tube SW1 grid and source electrode it
Between voltage amplitude limit, i.e. the negative electrode of Zener diode DW1 is connected with the grid of switching tube SW1, the anode of Zener diode DW1 with
The source electrode of switching tube SW1 is connected；
In the two ends shunt regulator diode DW2 of the biasing resistor R2, it is beneficial to grid and the source of the synchronous rectifier SR1
Voltage amplitude limit between pole, the i.e. negative electrode of Zener diode DW2 are connected with the source electrode of synchronous rectifier SR1, Zener diode DW2
Anode be connected with the grid of synchronous rectifier SR1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621076964.5U CN206060536U (en) | 2016-09-21 | 2016-09-21 | He controls formula light-coupled isolation self-powered BOOST type synchronous rectified powers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621076964.5U CN206060536U (en) | 2016-09-21 | 2016-09-21 | He controls formula light-coupled isolation self-powered BOOST type synchronous rectified powers |
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| Publication Number | Publication Date |
|---|---|
| CN206060536U true CN206060536U (en) | 2017-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621076964.5U Expired - Fee Related CN206060536U (en) | 2016-09-21 | 2016-09-21 | He controls formula light-coupled isolation self-powered BOOST type synchronous rectified powers |
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| CN (1) | CN206060536U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254702A (en) * | 2018-01-25 | 2018-07-06 | 常州同惠电子股份有限公司 | Resistance simulation device based on multiplying-type digital analog converter |
-
2016
- 2016-09-21 CN CN201621076964.5U patent/CN206060536U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108254702A (en) * | 2018-01-25 | 2018-07-06 | 常州同惠电子股份有限公司 | Resistance simulation device based on multiplying-type digital analog converter |
| CN108254702B (en) * | 2018-01-25 | 2020-05-05 | 常州同惠电子股份有限公司 | Resistor simulation device based on multiplication type digital-to-analog converter |
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Granted publication date: 20170329 Termination date: 20180921 |