CN106712551A - Synchronous rectifier switch, synchronous rectifier chip and synchronous rectifier circuit - Google Patents
Synchronous rectifier switch, synchronous rectifier chip and synchronous rectifier circuit Download PDFInfo
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- CN106712551A CN106712551A CN201611097711.0A CN201611097711A CN106712551A CN 106712551 A CN106712551 A CN 106712551A CN 201611097711 A CN201611097711 A CN 201611097711A CN 106712551 A CN106712551 A CN 106712551A
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 80
- 230000006698 induction Effects 0.000 claims description 21
- 230000004913 activation Effects 0.000 claims description 13
- 239000003381 stabilizer Substances 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 2
- 238000004804 winding Methods 0.000 description 19
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 239000008186 active pharmaceutical agent Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000010587 phase diagram Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
- H02M7/2195—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration the switches being synchronously commutated at the same frequency of the AC input voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
-
- 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 invention discloses a synchronous rectifier switch, a synchronous rectifier chip and a synchronous rectifier circuit. The synchronous rectifier switch comprises a power device, a freewheeling diode and a trigger circuit. The power device is an IGBT or an NMOS; the first end of the power device is connected with the cathode of the freewheeling diode; the second end of the power device is connected with the anode of the freewheeling diode and the first end of the trigger circuit; the third end of the power device is connected with the second end of the trigger circuit; and the third end of the trigger circuit serves as a trigger end. When the voltage of the second end of the power device is larger than conduction voltage of the freewheeling diode and is smaller than a trigger threshold value, the freewheeling diode is conducted and the power device is turned off; when the voltage is larger than the trigger threshold value, the trigger end triggers the power device to conduct; and when the voltage is smaller than the conduction voltage, the power device is turned off. Since the power device is the MOS transistor or the IGBT, when conducted, the power device has very low conduction internal resistance, usually only dozens of milliohms or a few milliohms; and therefore, power consumption is low, and efficiency and stability are improved.
Description
Technical field
The present invention relates to synchronous rectification field, more particularly to a kind of synchronous rectification switch, chip and circuit.
Background technology
The conversion of AC/DC is essential in power supply application, and rectification is a key in the transfer process of AC/DC
Link.In the prior art, usual rectifying device is generally diode, and diode has the characteristic of unilateal conduction, will can exchange
Electricity is converted into DC-pulse, and direct current is turned into after DC-pulse is filtered.All there is a voltage drop in conventional diode
Problem, this problem is unrelated with its pressure-resistant height, size of current or material source.Namely when electric current is by diode,
The two ends of diode have certain voltage loss, produce voltage difference, and this voltage difference is exactly voltage drop, and usual voltage drop exists
Between 0.3V-0.7V, for some diode, its voltage drop is a fixed value, not with the electric current flowed through in the diode
Size and change.
The value of the voltage drop of diode seems little, but the voltage in the state of high current and in the state of low-voltage
The influence of drop is very important.For example, when electric current is 100A, the power consumed on diode is 30w-70w, then now two
Pole pipe power consumption is very big, and this larger power consumption reduces the efficiency and stability of whole system；Additionally, when at some
In the working environment of low-voltage, it may be necessary to 1.5V even lower operating voltage, if now obtained using diode rectification
The low-voltage of needs, the voltage consumed on diode is about 0.5V or so, and 1/3 or so of whole voltage, diode are occupied substantially
Power consumption also can be the 1/3 of whole system, reduce the efficiency and stability of whole system.
Therefore, how to provide a kind of scheme for solving above-mentioned technical problem needs solution at present as those skilled in the art
Problem certainly.
The content of the invention
It is an object of the invention to provide a kind of synchronous rectification switch, because power device uses metal-oxide-semiconductor or IGBT, institute
With when power device is turned on its there is low-down conducting internal resistance, typically only tens milliohms or a few milliohms, therefore with compared with
Low power consumption, improves efficiency and stability；Opened including above-mentioned synchronous rectification it is a further object of the present invention to provide one kind
The synchronous rectification chip and circuit of pass.
In order to solve the above technical problems, the invention provides a kind of synchronous rectification switch, including power device, the pole of afterflow two
Pipe and triggers circuit, the power device are IGBT or NMOS, wherein：
The first end of the power device is connected with the negative electrode of the fly-wheel diode, second end point of the power device
Be not connected with the anode of the fly-wheel diode and the first end of the triggers circuit, the 3rd end of the power device with it is described
The second end connection of triggers circuit, the 3rd end of the triggers circuit is used as triggering end；When the power device is IGBT, institute
State the first end of colelctor electrode, emitter stage and base stage respectively as the power device, the second end and the 3rd end of IGBT；When described
When power device is NMOS, first end, the second end of the drain electrode, source electrode and grid of the NMOS respectively as the power device
And the 3rd end；
It is more than the conducting voltage of the fly-wheel diode and less than firing level when the voltage at the second end of the power device
During value, the fly-wheel diode conducting, the power device shut-off；It is described to touch when the voltage is more than the activation threshold value
The originator triggering power device conducting；When the voltage is less than the conducting voltage, the power device shut-off.
Preferably, the triggers circuit includes current-limiting resistance, discharge resistance and the first diode, wherein：
Used as the triggering end, the second end of the current-limiting resistance is respectively with described first for the first end of the current-limiting resistance
The first end connection of the negative electrode of diode and the discharge resistance, its common port is described as second end for triggering resistance
The anode of the first diode is connected with the second end of the discharge resistance, its common port as the triggers circuit first end.
Preferably, the triggers circuit also includes the snowslide pipe in parallel with the discharge resistance.
Preferably, the snowslide pipe includes two voltage-stabiliser tubes of differential concatenation.
Preferably, the IGBT is 1.
Preferably, the IGBT is the IGBT module that multiple IGBT in parallel are constituted.
In order to solve the above technical problems, present invention also offers a kind of synchronous rectification chip including as described above is same
Step rectifier switch.
In order to solve the above technical problems, present invention also offers a kind of circuit of synchronous rectification, including triggering device, also including
Synchronous rectification switch as described above, the input of the triggering device is connected with AC power, the triggering device it is defeated
Go out first end of the end respectively with the triggering end and the triggers circuit to be connected.
Preferably, the triggering device is transformer, and the primary coil of the transformer is used as the defeated of the triggering device
Enter end, the secondary coil of the transformer as the triggering device output end.
Preferably, the triggering device is induction coil, and the induction coil includes transmitting induction coil and receive to sense
Coil, the transmitting induction coil as the triggering device input, the induction receiving coil as it is described triggering fill
The output end put.
The invention provides a kind of synchronous rectification switch, chip and circuit, including power device, fly-wheel diode and triggering
Circuit, power device is IGBT or NMOS, wherein, the first end of power device is connected with the negative electrode of fly-wheel diode, power
Second end of device is connected with the anode of fly-wheel diode and the first end of triggers circuit respectively, the 3rd end of power device with touch
The second end connection of Power Generation Road, the 3rd end of triggers circuit is used as triggering end；When power device is IGBT, the current collection of IGBT
Pole, emitter stage and base stage are respectively as the first end of power device, the second end and the 3rd end；When power device is NMOS,
The drain electrode of NMOS, source electrode and grid are respectively as the first end of power device, the second end and the 3rd end；When the second of power device
The voltage at end more than fly-wheel diode conducting voltage and during less than activation threshold value, fly-wheel diode conducting, power device shut-off；
When voltage is more than activation threshold value, triggering end triggering power device conducting；When voltage is less than conducting voltage, power device is closed
It is disconnected.
It can be seen that, the synchronous rectification switch that the present invention is provided has the one-way conduction of diode, and reason is to work as power device
First end voltage less than fly-wheel diode conduction threshold when, power device shut-off, when the electricity at the second end of power device
Pressure more than fly-wheel diode conducting voltage and during less than activation threshold value, namely triggering end undertension now is causing power
During break-over of device, power device shut-off, fly-wheel diode is turned on, now power consumption very little；When voltage is more than activation threshold value, namely
When the voltage of triggering end is sufficiently large, triggering end triggering power device conducting, now fly-wheel diode is bypassed.Further, since work(
Rate device uses metal-oxide-semiconductor or IGBT, so it has low-down conducting internal resistance when power device is turned on, it is general to only have
Tens milliohms or a few milliohms, therefore with relatively low power consumption, improve efficiency and stability.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to institute in prior art and embodiment
The accompanying drawing for needing to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also obtain according to these accompanying drawings
Obtain other accompanying drawings.
A kind of structural representation of synchronous rectification switch that Fig. 1 is provided for the present invention；
A kind of concrete structure schematic diagram of synchronous rectification switch that Fig. 2 is provided for the present invention；
Fig. 3 triggers oscillogram for a kind of sine wave that the present invention is provided；
Fig. 4 using the structure of the synchronous rectification chip of TO class wrappers for the synchronous rectification switch provided by Fig. 2 is integrated, shown
It is intended to；
Fig. 5 using the structure of the synchronous rectification chip of TO class wrappers for the synchronous rectification switch provided by Fig. 2 is integrated, shown
It is intended to；
A kind of application schematic diagram of circuit of synchronous rectification that Fig. 6 is provided for the present invention；
The application schematic diagram of another circuit of synchronous rectification that Fig. 7 is provided for the present invention；
The application schematic diagram of another circuit of synchronous rectification that Fig. 8 is provided for the present invention；
Fig. 9 is the phase diagram of the trigger winding in Fig. 8.
Specific embodiment
Core of the invention is to provide a kind of synchronous rectification switch, because power device uses metal-oxide-semiconductor or IGBT, institute
With when power device is turned on its there is low-down conducting internal resistance, typically only tens milliohms or a few milliohms, therefore with compared with
Low power consumption, improves efficiency and stability；Another core of the invention is to provide one kind and is opened including above-mentioned synchronous rectification
The synchronous rectification chip and circuit of pass.
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Fig. 1 is refer to, a kind of structural representation of synchronous rectification switch that Fig. 1 is provided for the present invention, the synchronous rectification is opened
Pass includes power device, fly-wheel diode and triggers circuit, and power device is IGBT or NMOS, wherein：
The first end of power device is connected with the negative electrode of fly-wheel diode 1, the second end of power device respectively with afterflow two
The first end connection of the anode and triggers circuit 3 of pole pipe 1, the 3rd end of power device is connected with the second end of triggers circuit 3, touches
3rd end of Power Generation Road 3 is used as triggering end；When power device is IGBT, the colelctor electrode of IGBT, emitter stage and base stage are made respectively
It is the first end of power device, the second end and the 3rd end；When power device is NMOS 2, the drain electrode of NMOS 2, source electrode and grid
Pole is respectively as the first end of power device, the second end and the 3rd end；
When power device the second end voltage more than fly-wheel diode 1 conducting voltage and during less than activation threshold value, continue
Stream diode 1 is turned on, power device shut-off；When voltage is more than activation threshold value, triggering end triggering power device conducting；Work as voltage
During less than conducting voltage, power device shut-off.
Specifically, (IGBT is similarly) is made to be situated between to the operation principle of synchronous rectification switch so that power device is as NMOS as an example below
Continue：
Triggering end one alternating-current pulse of needs of synchronous rectification switch could be triggered, and alternating-current pulse has two kinds：One kind side of being
Wave impulse, another kind is sinusoidal wave pulse.This alternating-current pulse provides a positive trigger voltage, NMOS for the grid of NMOS 2
2 source electrode and drain electrode are turned on, the internal resistance very little after being turned on due to NMOS 2, generally only number milliohm, equivalent to dead short, together
When by the short circuit of fly-wheel diode 1, therefore when high current flows through NMOS 2, be lost with regard to very little.
After alternating-current pulse disappears, NMOS 2 is closed due to losing positive trigger voltage, and fly-wheel diode 1 recovers original
Diode function；That is, when having triggering, synchronous rectification switch equivalent to a switch for closure, during without triggering, open by synchronous rectification
Close equivalent to a diode；
In addition, the effect of fly-wheel diode 1 here is initial rectification, i.e., it is insufficient to allow metal-oxide-semiconductor to turn in trigger signal
Before, fly-wheel diode 1 is first turned on, allow low current elder generation rectification；After trigger signal enough turns on NMOS2, the quilt of fly-wheel diode 1
The extremely short roads of DS of NMOS 2, fly-wheel diode 1 is invalid.
NMOS 2 can be replaced from IGBT in the case of high-voltage great-current.
To sum up, when the voltage at the second end of power device is less than conducting voltage, power device shut-off；When power device
The voltage at the second end more than fly-wheel diode 1 conducting voltage and during less than activation threshold value, namely triggering terminal voltage now is not
When being enough to cause power device to turn on, power device shut-off, fly-wheel diode 1 is turned on, now power consumption very little；When voltage is more than tactile
Hair threshold value when, namely triggering end voltage it is sufficiently large when, triggering end triggering power device conducting, because power device is used
Metal-oxide-semiconductor or IGBT, generally only count milliohm, and now fly-wheel diode 1 is quite bypassed completely.It can be seen that, it is same that the application is provided
Step rectifier switch has a unilateral conduction, and resistance very little during conducting, reduces power consumption, the stability of circuit where improve and
Efficiency.
Preferably, triggers circuit 3 includes current-limiting resistance 31, the diode 33 of discharge resistance 32 and first, wherein：
The first end of current-limiting resistance 31 as triggering end, the second end of current-limiting resistance 31 respectively with the moon of the first diode 33
Pole and discharge resistance 32 first end connection, its common port as triggering resistance the second end, the anode of the first diode 33 with
Discharge resistance 32 the second end connection, its common port as triggers circuit 3 first end.
It is understood that current-limiting resistance 31 and discharge resistance 32 here ensure that the stabilization safety of synchronous rectification switch
Work, improves the security performance and stability of synchronous rectification switch.
Preferably, triggers circuit 3 also includes the snowslide pipe 34 in parallel with discharge resistance 32.
Specifically, Fig. 2, a kind of concrete structure schematic diagram of synchronous rectification switch that Fig. 2 is provided for the present invention be refer to.
In order to improve the security performance of synchronous rectification switch, the application is also in parallel one at the two ends of discharge resistance 32
Snowslide pipe 34.Certainly, here can also a voltage-stabiliser tube in parallel.
Fig. 3 is refer to, Fig. 3 triggers oscillogram for a kind of sine wave that the present invention is provided.
Effect with reference to Fig. 3 to fly-wheel diode 1 is described in further detail：
Ab segment tables show the trigger signal of triggering end start from scratch rising when, trigger signal be insufficient to allow NMOS 2 turn on before,
Fly-wheel diode 1 is first turned on, allow low current elder generation rectification；Bc segment tables show when trigger signal make enough NMOS 2 turn on after, afterflow two
Pole pipe 1 is by the extremely short roads of the DS of NMOS 2, and fly-wheel diode 1 is invalid；Cd segment tables show that when trigger signal very little at this moment NMOS 2 breaks
Open, fly-wheel diode 1 is turned under low current again.
Preferably, snowslide pipe 34 includes two voltage-stabiliser tubes of differential concatenation.
Specifically, snowslide pipe 34 here can be by replacing after two pressure-resistant identical voltage-stabiliser tube differential concatenations, it is desirable to steady
Pressure pipe it is pressure-resistant pressure-resistant identical or close with snowslide pipe 34.
Certainly, snowslide pipe 34 here can also use other kinds of snowslide pipe, and the present invention does not do special limit herein
It is fixed, determined according to actual conditions.
Preferably, IGBT is 1.
Preferably, IGBT is the IGBT module that multiple IGBT in parallel are constituted.
It should be noted that in the synchronous rectification application of super-large current or super-pressure, power device can use IGBT
Or IGBT module.When IGBT is turned on, it has low-down conducting internal resistance, can improve efficiency, increase the stabilization of circuit
Property.
Wherein, IGBT module is formed in parallel by multiple IGBT, to realize shunting, and multiple IGBT it is in parallel later its
Interior resistive it is smaller, so, when IGBT module is turned on, with lower conducting internal resistance, can be further able to improve efficiency, increase
Power up the stability on road.
The invention provides a kind of synchronous rectification switch, including power device, fly-wheel diode and triggers circuit, power device
Part is IGBT or NMOS, wherein, the first end of power device is connected with the negative electrode of fly-wheel diode, the second end of power device
It is connected with the anode of fly-wheel diode and the first end of triggers circuit respectively, the 3rd end of power device and the second of triggers circuit
End connection, the 3rd end of triggers circuit is used as triggering end；When power device is IGBT, the colelctor electrode of IGBT, emitter stage and base
Pole is respectively as the first end of power device, the second end and the 3rd end；When power device is NMOS, the drain electrode of NMOS, source electrode
And grid is respectively as the first end of power device, the second end and the 3rd end；Continue when the voltage at the second end of power device is more than
Flow the conducting voltage of diode and during less than activation threshold value, fly-wheel diode conducting, power device shut-off；When voltage is more than triggering
During threshold value, triggering end triggering power device conducting；When voltage is less than conducting voltage, power device shut-off.
It can be seen that, the synchronous rectification switch that the present invention is provided has the one-way conduction of diode, and reason is to work as power device
First end voltage less than fly-wheel diode conduction threshold when, power device shut-off, when the electricity at the second end of power device
Pressure more than fly-wheel diode conducting voltage and during less than activation threshold value, namely triggering end undertension now is causing power
During break-over of device, power device shut-off, fly-wheel diode is turned on, now power consumption very little；When voltage is more than activation threshold value, namely
When the voltage of triggering end is sufficiently large, triggering end triggering power device conducting, now fly-wheel diode is bypassed.Further, since work(
Rate device uses metal-oxide-semiconductor or IGBT, so it has low-down conducting internal resistance when power device is turned on, it is general to only have
Tens milliohms or a few milliohms, therefore with relatively low power consumption, improve efficiency and stability.
Present invention also offers a kind of synchronous rectification chip, including synchronous rectification switch described above.
It is understood that synchronous rectification chip here is integrated by synchronous rectification switch mentioned above, and root
According to the difference of the application places of size of current, diversified forms can be packaged into, based on trifocal, TO classes such as TO-220, TO-
247, TO-3, SOT class such as SOT-23, LDPAK classes, D2PARK classes, or even module class etc..
Wherein, the common port first end of power device being connected with the negative electrode of fly-wheel diode is used as synchronous rectification switch
Negative electrode K, the second end of power device is public with what the anode of fly-wheel diode and the first end of triggers circuit were connected respectively
Hold as synchronous rectification switch anode A, triggering end as synchronous rectification switch trigger electrode T.
Specifically, Fig. 4 and Fig. 5 is refer to, wherein, Fig. 4 is for the synchronous rectification switch provided by Fig. 2 is integrated, using TO
The structural representation of the synchronous rectification chip of class wrapper, Fig. 5 is for the synchronous rectification switch provided by Fig. 2 is integrated, using TO classes
The structural representation of the synchronous rectification chip of encapsulation.
In addition, refer to above-described embodiment for the introduction of synchronous rectification switch in synchronous rectification chip, the present invention is herein
Repeat no more.
Present invention also offers a kind of circuit of synchronous rectification, including triggering device, also opened including synchronous rectification described above
Close, the input of triggering device is connected with AC power, the output end of triggering device is respectively with the of triggering end and triggers circuit
One end connects.
Preferably, triggering device is transformer, the primary coil of transformer as triggering device input, transformation
The secondary coil of device as triggering device output end.
Preferably, triggering device is induction coil, and induction coil includes transmitting induction coil and induction receiving coil,
Transmitting induction coil as triggering device input, induction receiving coil as triggering device output end.
Specifically, triggering end one alternating-current pulse of needs of synchronous rectification switch could be triggered, and alternating-current pulse is from tactile
Transmitting apparatus, triggering device can be transformer, can be induction coil.
When triggering device is transformer, primary coil now is alternatively referred to as buffer coil, and secondary coil is properly termed as
Trigger winding.When triggering device is induction coil, then transmitting induction coil now is alternatively referred to as buffer coil, receives sensing
Coil is alternatively referred to as trigger winding.
No matter triggering device is transformer or induction coil, now the outside of synchronous rectification switch only needs a firing line
Circle, it is not necessary to special triggering IC, circuit structure is simple, easy to use, low cost.
Fig. 6 and Fig. 7 is refer to, wherein, a kind of application schematic diagram of circuit of synchronous rectification that Fig. 6 is provided for the present invention, Fig. 7
It is the application schematic diagram of another circuit of synchronous rectification that the present invention is provided.
Firstly the need of explanation, effect of the synchronous rectification switch in halfwave rectifier is with general-purpose diode in halfwave rectifier
In effect it is similar.
Specifically, synchronous rectification switch S1 is connected in ac circuit, and its trigger winding L1 passes through magnetic core and alignment buffer
Circle L5 is combined into a transformer, and L5 is primary coil, and the number of turn is little, or even an only circle, i.e. coil is from magnetic core or magnet ring
Pass through, trigger winding L1 is secondary coil, and C1 is filter capacitor, and R is load resistance.
If in the reception rectification of electromagentic resonance, trigger winding L1 and buffer coil L5 is two independent coils, is not also had
There is magnetic core to combine them, trigger winding L1 is independently placed in the magnetic field of electromagentic resonance.
Fig. 8 and Fig. 9 is refer to, wherein, the application schematic diagram of another circuit of synchronous rectification that Fig. 8 is provided for the present invention,
Fig. 9 is the phase diagram of the trigger winding in Fig. 8.
Effect of effect of the synchronous rectification switch in full-wave rectification to general-purpose diode in full-wave rectification is similar.
As Fig. 8, four synchronous rectification switch S1, S2, S3, S4 are connected in ac circuit by full-bridge mode, its four touch
Hair line circle L1, L2, L3, L4 is combined as a transformer by magnetic core and buffer coil L5, and L5 is primary coil, and the number of turn is little,
An even only circle, i.e. coil is passed through from magnetic core or magnet ring, and L1 is secondary coil, and C1 is filter capacitor, and R is load resistance.
If in the reception rectification of electromagentic resonance, buffer coil L5 is an independent device, with trigger winding L1, L2,
L3, L4 are separated, and also no magnetic core combines them, trigger winding L1, L2, L3, L4 with four enamel-covered wires and around forming,
It is that winding the inside has four coils, four coil turns are identical, the phase of two of which is with another two conversely, i.e. pin pair
Adjust, four trigger windings are placed in the magnetic field of electromagentic resonance.
In the Switching Power Supply of transformer closing, in such as Fig. 8, trigger winding L1, L2, L3, L4 and buffer coil L5 are bundled
Together, one transformer of composition is coupled by magnetic core, buffer coil L5 is primary coil, and trigger winding L1, L2, L3, L4 are
Secondary coil, magnetic core is the shape of the mouth as one speaks or O-shaped high frequency magnetic core, such as ferrite；Seldom, only several circles are even for the L5 numbers of turn of primary coil
An only circle.
Wherein, the method for coiling trigger winding is：Simultaneously with four enamel-covered wire pitch of the laps on skeleton, therefore, four triggerings
The number of turn of coil is identical, as long as but two of which coil with the phase requirements of another two coil conversely, specific practice will wherein
Two ends of incoming cables of coil are exchanged with leading-out terminal, are then combined into a transformer with magnetic core.
In the wireless power of electromagentic resonance, trigger winding L1, L2, L3, L4 are air core coil, coiling trigger winding
Method is：Simultaneously with four enamel-covered wire pitch of the laps, therefore, the number of turn of four trigger windings is identical, but two of which coil with it is another
As long as two phase requirements of coil are conversely, specific practice exchanges the end of incoming cables of two of which coil and leading-out terminal, so
This four trigger windings are placed in the magnetic field of wireless power afterwards just may be used.
It should be noted that in this manual, such as first and second or the like relational terms are used merely to one
Individual entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operate it
Between there is any this actual relation or order.And, term " including ", "comprising" or its any other variant be intended to
Cover including for nonexcludability, so that process, method, article or equipment including a series of key elements not only include those
Key element, but also other key elements including being not expressly set out, or also include for this process, method, article or set
Standby intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Also there is other identical element in the process including the key element, method, article or equipment.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or uses the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The scope most wide for causing.
Claims (10)
1. a kind of synchronous rectification switch, it is characterised in that including power device, fly-wheel diode and triggers circuit, the power
Device is IGBT or NMOS, wherein：
The first end of the power device is connected with the negative electrode of the fly-wheel diode, the second end of the power device respectively with
The first end connection of the anode of the fly-wheel diode and the triggers circuit, the 3rd end and the triggering of the power device
The second end connection of circuit, the 3rd end of the triggers circuit is used as triggering end；It is described when the power device is IGBT
The colelctor electrode of IGBT, emitter stage and base stage are respectively as the first end of the power device, the second end and the 3rd end；When the work(
When rate device is NMOS, the drain electrode of the NMOS, source electrode and grid respectively as the first end of the power device, the second end and
3rd end；
When the power device the second end voltage more than the fly-wheel diode conducting voltage and during less than activation threshold value,
The fly-wheel diode conducting, the power device shut-off；When the voltage is more than the activation threshold value, the triggering end is touched
Conducting of sending out power device described；When the voltage is less than the conducting voltage, the power device shut-off.
2. synchronous rectification switch according to claim 1, it is characterised in that the triggers circuit includes current-limiting resistance, puts
Resistance and the first diode, wherein：
The first end of the current-limiting resistance as the triggering end, the second end of the current-limiting resistance respectively with the one or two pole
The first end connection of the negative electrode of pipe and the discharge resistance, its common port is used as second end for triggering resistance, described first
The anode of diode is connected with the second end of the discharge resistance, its common port as the triggers circuit first end.
3. synchronous rectification switch according to claim 2, it is characterised in that the triggers circuit also includes and the electric discharge
The snowslide pipe of resistor coupled in parallel.
4. synchronous rectification switch according to claim 3, it is characterised in that the snowslide pipe includes two differential concatenations
Voltage-stabiliser tube.
5. the synchronous rectification switch according to claim any one of 1-4, it is characterised in that the IGBT is 1.
6. the synchronous rectification switch according to claim any one of 1-4, it is characterised in that the IGBT is multiple in parallel
The IGBT module that IGBT is constituted.
7. a kind of synchronous rectification chip, it is characterised in that including the synchronous rectification switch as described in claim any one of 1-6.
8. a kind of circuit of synchronous rectification, it is characterised in that including triggering device, also including as described in claim any one of 1-6
Synchronous rectification switch, the input of the triggering device is connected with AC power, the output end of the triggering device respectively with
The first end connection of the triggering end and the triggers circuit.
9. circuit of synchronous rectification according to claim 8, it is characterised in that the triggering device is transformer, the change
The primary coil of depressor as the triggering device input, the secondary coil of the transformer is used as the triggering device
Output end.
10. circuit of synchronous rectification according to claim 8, it is characterised in that the triggering device is induction coil, described
Induction coil include transmitting induction coil and induction receiving coil, the transmitting induction coil as the triggering device input
End, the induction receiving coil as the triggering device output end.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611097711.0A CN106712551A (en) | 2016-12-02 | 2016-12-02 | Synchronous rectifier switch, synchronous rectifier chip and synchronous rectifier circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611097711.0A CN106712551A (en) | 2016-12-02 | 2016-12-02 | Synchronous rectifier switch, synchronous rectifier chip and synchronous rectifier circuit |
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| CN106712551A true CN106712551A (en) | 2017-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611097711.0A Pending CN106712551A (en) | 2016-12-02 | 2016-12-02 | Synchronous rectifier switch, synchronous rectifier chip and synchronous rectifier circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923670A (en) * | 2018-07-27 | 2018-11-30 | 维沃移动通信有限公司 | A kind of circuit of synchronous rectification and electronic equipment |
| CN113346757A (en) * | 2021-06-11 | 2021-09-03 | 西安微电子技术研究所 | Self-driven synchronous rectification circuit and working method and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826810A (en) * | 2009-10-22 | 2010-09-08 | Bcd半导体制造有限公司 | Synchronous rectifier circuit for switching power supply |
| JP2011130625A (en) * | 2009-12-21 | 2011-06-30 | Canon Inc | Power supply |
| CN105896987A (en) * | 2015-03-24 | 2016-08-24 | 上海英联电子系统有限公司 | Flyback converter bootstrap type synchronous rectification drive circuit |
| CN206349938U (en) * | 2016-12-02 | 2017-07-21 | 中惠创智无线供电技术有限公司 | A kind of synchronous rectification switch, chip and circuit |
-
2016
- 2016-12-02 CN CN201611097711.0A patent/CN106712551A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101826810A (en) * | 2009-10-22 | 2010-09-08 | Bcd半导体制造有限公司 | Synchronous rectifier circuit for switching power supply |
| JP2011130625A (en) * | 2009-12-21 | 2011-06-30 | Canon Inc | Power supply |
| CN105896987A (en) * | 2015-03-24 | 2016-08-24 | 上海英联电子系统有限公司 | Flyback converter bootstrap type synchronous rectification drive circuit |
| CN206349938U (en) * | 2016-12-02 | 2017-07-21 | 中惠创智无线供电技术有限公司 | A kind of synchronous rectification switch, chip and circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923670A (en) * | 2018-07-27 | 2018-11-30 | 维沃移动通信有限公司 | A kind of circuit of synchronous rectification and electronic equipment |
| CN113346757A (en) * | 2021-06-11 | 2021-09-03 | 西安微电子技术研究所 | Self-driven synchronous rectification circuit and working method and application thereof |
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Effective date of registration: 20210308 Address after: 518000 room 133-134, No.1 International Students (Longgang) Pioneer Park, Longcheng street, Longgang District, Shenzhen City, Guangdong Province Applicant after: ZONECHARGE (SHENZHEN) WIRELESS POWER TECHNOLOGY Co.,Ltd. Address before: 264003 Mingda West Road, Laishan District, Yantai, Shandong Province, No. 11 Applicant before: ZONECHARGE WIRELESS POWER TECHNOLOGY Co.,Ltd. |
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