CN104917359B - A kind of upper switch tube driving circuit and apply its synchronous boost circuits - Google Patents

A kind of upper switch tube driving circuit and apply its synchronous boost circuits Download PDF

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Publication number
CN104917359B
CN104917359B CN201510290741.2A CN201510290741A CN104917359B CN 104917359 B CN104917359 B CN 104917359B CN 201510290741 A CN201510290741 A CN 201510290741A CN 104917359 B CN104917359 B CN 104917359B
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China
Prior art keywords
switching tube
circuit
voltage
bootstrap capacitor
upper
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CN201510290741.2A
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Chinese (zh)
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CN104917359A (en
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吴孟泽
范洪峰
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矽力杰半导体技术(杭州)有限公司
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Abstract

The invention discloses a kind of upper switch tube driving circuit and using its synchronous boost circuits, the upper switch tube driving circuit includes:Bootstrap capacitor, one end is connected to a burning voltage, and the other end is connected to one end of precharge control circuit;The precharge control circuit, to before system electrification and power stage circuit are started working or system in a dormant state when, control enters line precharge by the burning voltage to the bootstrap capacitor, up to the voltage at bootstrap capacitor two ends reaches predetermined value;Driver, to the control signal according to upper switching tube, exports corresponding drive signal to control the conducting state of upper switching tube.Using switch tube driving circuit on this, the control accuracy of system can be improved, and can be avoided in initialization, because upper switching tube does not have fully on so that the problem of increase is lost caused by high current flows through the parasitic diode of upper switching tube.

Description

A kind of upper switch tube driving circuit and apply its synchronous boost circuits

Technical field

The present invention relates to a kind of Power Electronic Technique, it is applied to more specifically to a kind of in synchronization boost circuits Upper switch tube driving circuit.

Background technology

Synchronous boost circuits (booster circuit) compared to traditional diode continuousing flow boost circuits due to reduction damage There is obvious advantage in terms of consumption and be widely used.

In the power stage circuit of synchronous boost circuits, the switching tube that one of polar end is grounded is designated as lower switch Pipe, a polar end is connected with lower switching tube, the switching tube that another polar end is connected with output end is designated as upper switching tube.And generally In order to reduce device volume, cost is saved, in the prior art often using the driving that a driving power supply is two switching tubes Circuit provides operating voltage.Also, in order to save the area of chip, in the case of same conducting resistance, upper switching tube is preferential From the switching tube of NMOS types.

Fig. 1 is shown in the prior art applied to the upper switching tube driving electricity in the power stage circuit of synchronization boost circuits The circuit diagram on road.It is well known that when driving crystal, when the voltage between grid source electrode is more than cut-in voltage, transistor is led It is logical;When the voltage between grid source electrode drops to below cut-in voltage, transistor shut-off.It is shown in Figure 1.Synchronous boost circuits In lower switching tube M1 source electrode be connected to ground, under driving during switching tube MI, as long as pwm signal for it is high when be supplied to grid one Individual constant voltage (such as VDD), you can meet the power demands of lower switch tube driving circuit.

And upper switching tube M2 grid is connected to the common point (being designated as tie point LX) of inductance L and two switching tubes, according to The operation principle of on-off circuit understands that tie point LX is a high frequency square wave trip point.Therefore need a suspended voltage, the suspension Voltage is attached on LX voltages, for providing driving voltage to upper switching tube.

It is a kind of current most common upper switching tube driving method using bootstrap capacitor.Fig. 1 show bootstrap approach, its work Make principle as follows:During lower switching tube M1 conductings, tie point LX current potential is pulled low to the burning voltage V in ground, control chipDD By switching M3 (or bootstrap diode) to bootstrap capacitor CBSCharging, passes through bootstrap capacitor CBSIn bootstrap capacitor CBSTwo ends (i.e. point Between BS and tie point LX) form a suspended voltage.After lower switching tube M1 shut-offs, tie point LX voltage clamping is in input Voltage Vin, now the voltage of the first end BS points of electric capacity is the voltage Vin that the suspended voltage adds its second end LX points. Upper switching tube M2 control signal PWM2 for it is high when, driver DR1 is by the control source of BS points to M2 grid to drive M2 to lead It is logical;Upper switching tube M2 control signal PWM2 for it is low when, driver DR1 by the grid of tie point LX control source to M2 with Turn off M2.

The present inventor has found that prior art has following defect in the research process for carrying out the technology of the present invention:

In the original state of device, bootstrap capacitor CBSThe voltage at two ends is 0, if the lower each turn-on cycles of switching tube M1 Time falls short of, then needs for several cycles could be bootstrap capacitor CBSThe voltage at two ends is charged to about burning voltage VDD, at this During individual, because driving voltage is not enough, upper switching tube M2 can not be fully on, and big electric current is flowed through switching tube M2's Body diode, causes larger loss.

The content of the invention

In view of this, the invention provides a kind of upper switch tube driving circuit, to solve in the prior art, synchronous boost The problem of circuit causes switching tube fully in initialization due to the driving voltage deficiency of upper switching tube, reduction The loss of circuit.

In a first aspect, the present invention provides a kind of upper switch tube driving circuit, it is described same applied in synchronous boost circuits The power stage circuit of step boost circuits is made up of inductance, lower switching tube and upper switching tube, a polar end of the lower switching tube Ground connection, another polar end is connected with a polar end of the upper switching tube, it is characterised in that the upper switch tube driving circuit bag Include:

Bootstrap capacitor, one end is connected to a burning voltage, and the other end is connected to one end of precharge control circuit;

The precharge control circuit, to before system electrification and power stage circuit are started working or system is in and stopped During dormancy state, control enters line precharge by the burning voltage to the bootstrap capacitor, until the voltage at bootstrap capacitor two ends Reach predetermined value;

Driver, to the control signal according to upper switching tube, exports corresponding drive signal to control upper switching tube Conducting state.

Preferably, the driver, when the control signal of switching tube is high on described, exports bootstrap capacitor and described steady The voltage of voltage tie point is determined to the grid of the upper switching tube;

When the control signal of switching tube is low on described, in the power stage circuit for exporting the synchronous boost circuits The voltage of the tie point of lower switching tube and upper switching tube to the upper switching tube grid.

Preferably, it is characterised in that the precharge control circuit includes first switch circuit and second switch circuit,

The first switch circuit is in system electrification and power stage circuit starts working preceding or system in a dormant state When turn on, the voltage at the bootstrap capacitor two ends is turned off when reaching predetermined value;

The second switch circuit is always maintained at shut-off when the bootstrap capacitor enters line precharge, until the bootstrapping electricity The voltage for holding two ends is begun to turn on when reaching predetermined value.

Preferably, it is characterised in that the first switch circuit is a transistor, the parasitic diode of the transistor Anode is connected to the ground, and negative electrode is connected with the tie point of the bootstrap capacitor and precharge control circuit.

Preferably, it is characterised in that the first switch circuit is a switch, the switch is connected to the bootstrap capacitor Between the tie point and ground of precharge control circuit.

Preferably, it is characterised in that the second switch circuit is a transistor, the parasitic diode of the transistor Anode is connected with the tie point of the bootstrap capacitor and precharge control circuit, the power of negative electrode and the synchronous boost circuits The tie point connection of lower switching tube and upper switching tube in level circuit.

Preferably, it is characterised in that the second switch circuit is a switch, the switch is connected to the bootstrap capacitor With the lower switching tube and upper switching tube in the tie point of precharge control circuit and the power stage circuit of the synchronous boost circuits Tie point between.

Second aspect, the technology of the present invention provides a kind of synchronous boost circuits, it is preferable that including power stage circuit and above-mentioned Upper switch tube driving circuit.

The technology of the present invention in upper switch tube driving circuit by adding precharge control circuit, in system electrification and power When level circuit starts working preceding or system in a dormant state, control is carried out by the burning voltage to the bootstrap capacitor Precharge, until the voltage at bootstrap capacitor two ends reaches predetermined value, when main power circuit is started working, the drive of upper switching tube Dynamic voltage disclosure satisfy that the fully on requirement of switching tube.So as to improve the control accuracy of system, and can avoid by The problem of increase is lost caused by the parasitic diode of upper switching tube is flowed through in high current.

Brief description of the drawings

In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis The accompanying drawing of offer obtains other accompanying drawings.

Fig. 1 is the circuit diagram of upper switch tube driving circuit in the prior art;

Fig. 2 is the circuit diagram of the upper switch tube driving circuit of first embodiment of the invention;

Fig. 3 is the drive signal generation circuit of the first switch circuit of first embodiment of the invention;

Fig. 4 is the drive signal generation circuit of the second switch circuit of first embodiment of the invention;

Fig. 5 is the circuit diagram of the upper switch tube driving circuit of second embodiment of the invention.

Embodiment

Below based on embodiment, present invention is described, but the present invention is not restricted to these embodiments.Under Text is detailed to describe some specific detail sections in the detailed description of the present invention.Do not have for a person skilled in the art The description of these detail sections can also understand the present invention completely.In order to avoid obscuring the essence of the present invention, known method, mistake Journey, flow, element and circuit do not have detailed narration.

In addition, it should be understood by one skilled in the art that provided herein accompanying drawing be provided to explanation purpose, and What accompanying drawing was not necessarily drawn to scale.

It will also be appreciated that in the following description, " circuit " refers to be passed through by least one element or sub-circuit electric The galvanic circle that connection or electromagnetism are connected and composed." connected when claiming element or circuit " being connected to " another element or element/circuit " between two points when, it can directly be coupled or be connected to another element or there may be between intermediary element, element Connection can be physically, in logic or its combination.On the contrary, when title element " being directly coupled to " or " being directly connected to To " another element when, it is meant that both be not present intermediary element.

Unless the context clearly requires otherwise, otherwise entire disclosure is similar with the " comprising " in claims, "comprising" etc. Word should be construed to the implication included rather than exclusive or exhaustive implication;That is, being containing for " including but is not limited to " Justice.

In the description of the invention, it is to be understood that term " first ", " second " etc. be only used for describe purpose, without It is understood that to indicate or imply relative importance.In addition, in the description of the invention, unless otherwise indicated, the implication of " multiple " It is two or more.

Fig. 2 is the circuit diagram of the upper switch tube driving circuit of first embodiment of the invention.Upper switch tube driving circuit Applied in synchronous boost circuits.

Referring to Fig. 2, the power stage circuit of the synchronous boost circuits includes:Lower switching tube M1, the upper switching tube of series connection bridge joint M2 and inductance L.In the present embodiment, the lower switching tube M1 and upper switching tube M2 are by taking N-channel transistor npn npn as an example.Its In, lower switching tube M1 source ground, drain electrode is connected with upper switching tube M2 source electrode, is connected and is a little designated as tie point LX, on Switching tube M2 drain electrode is connected to the output end vo ut of the power stage circuit of synchronous boost circuits.In the work(of synchronous boost circuits In rate level circuit, input voltage vin is inputted from inductance L, passes through the electricity being made up of lower switching tube M1 and upper switching tube M2 bridge joints Road direction load end provides energy.

Lower switching tube M1 control end is that grid receives the first drive signal TG1, and its source electrode is connected to ground.Due to brilliant in driving During body pipe, when the voltage between grid source electrode is more than cut-in voltage, transistor just can be turned on, therefore in lower switching tube M1 control signal When PWM1 is high, the drive circuit of lower switching tube is supplied to the constant voltage of grid one (such as stabilization that LDO is exported in chip Voltage VDD), you can meet the power demands of lower switch tube driving circuit.

Upper switching tube M2 control end is that grid receives the second drive signal TG2, and its source electrode is tie point LX.Due to connection Point LX is lower switching tube M1 and upper switching tube M2 points of common connection, and the voltage of the point can follow lower switching tube M1 conducting shape The change of state and change, instantly switching tube M1 turn on when, tie point LX voltage is pulled low to ground;Instantly switching tube M1 is turned off When, tie point LX voltage is clamped at input voltage vin.Therefore lower switching tube M2 source voltage is the voltage of a saltus step, no It can use and go to drive switching tube M2 similar to voltage constant as lower switching tube M1, its driving voltage must be superimposed upon source Could effectively it be driven on the voltage of pole.Although upper switch tube driving circuit of the prior art shown in Fig. 1 solves switching tube M2 driving problems, but still suffer from such as in several cycles before system works, due to bootstrap capacitor CBSBoth end voltage is not enough Cause switching tube M2 fully on, and big electric current is flowed through switching tube M2 parasitic diode, cause larger The problem of loss.

The present embodiment is used by bootstrap capacitor CBS, precharge control circuit 21 and driver DR2 constitute one on switch Tube drive circuit, the second drive signal TG2 is provided for upper switching tube M2.

Wherein, bootstrap capacitor CBS, one end is connected to the burning voltage V that LDO is exported in chipDD, the other end is connected to bootstrapping Electric capacity CBSWith the connection end BS2 of precharge control circuit, to upper switching tube M2 control signal PW2 for it is high when, by its two The voltage superposition at end is on lower switching tube M1 and upper switching tube M2 tie point LX voltage, bootstrap capacitor CBSWith stable electricity Press VDDOne end BS1 of connection voltage is used for driving switching tube M2 to turn on.

It is understood that bootstrap capacitor CBSWith burning voltage VDDConnection can pass through power switch pipe or two poles Pipe, to realize reverse blocking.In the present embodiment, using will by power switch pipe M3 (by taking N-channel transistor as an example) Bootstrap capacitor CBSOne end BS1 be connected to burning voltage VDD, power switch pipe M3 source electrode is connected to burning voltage VDD, drain electrode It is connected to bootstrap capacitor CBSOne end BS1, its object is to cause the power switch pipe M3 anode of parasitic diode connect stabilization Voltage VDD, negative electrode meets bootstrap capacitor CBSOne end BS1, to realize when power switch pipe M3 is turned off, the reverse blocking of electric current.

Precharge control circuit 21, one end is connected to bootstrap capacitor CBSWith the points of common connection of precharge control circuit 21 BS2, the other end is connected to lower switching tube M1 and upper switching tube M2 tie point LX.Precharge control circuit 21 is opened including first Powered-down road 211 and second switch circuit 212, the first switch circuit 211 are connected between BS2 ends and ground, and described second opens Powered-down road 212 is connected between BS2 ends and LX ends.Precharge control circuit 21 is used to start in system electrification and power stage circuit When working preceding or system in a dormant state, control enters line precharge by the burning voltage to the bootstrap capacitor, directly Voltage to bootstrap capacitor two ends reaches predetermined value.After precharge refers to that chip is started working, burning voltage VDDThough set up, It is that master power switch pipe (herein referring to M1 and M2) in power stage circuit was not started to also in a period of time of work, to bootstrapping electricity Hold CBSThe process charged in advance.

In the present embodiment, first switch circuit 211 is a transistor M4 (by taking N-channel transistor as an example), transistor M4 The anode of parasitic diode be connected to the ground, negative electrode is connected to bootstrap capacitor CBSWith the points of common connection of precharge control circuit 21 BS2.For N-channel transistor, the anode of its parasitic diode is in source terminal, and negative electrode is in drain electrode end.Transistor M4's posts The reason for raw diode is so connected is that it is possible to ensure to turn off in transistor M4, when transistor M5 is turned on, the voltage at BS2 ends At the voltage for being maintained at LX ends, and it is unlikely to because transistor M4 parasitic diode conducting is pulled to ground potential.Transistor M4 before system electrification and power stage circuit are started working or system in a dormant state when turn on, in bootstrap capacitor two ends CBS Voltage turn off when reaching predetermined value.

Control on or off of the transistor M4 by the first logical signal LOGIC1.Specifically, this hair shown in Figure 3 The drive signal generation circuit of the first switch circuit of bright first embodiment.Driver DR3 is in the first logical signal LOGIC1 Gao Shi, i.e., before system electrification and power stage circuit are started working or system in a dormant state when, export burning voltage VDD As fourth drive signal TG4 transistor M4 is turned on;The first logical signal LOGIC2 for it is low when, i.e. bootstrap capacitor two ends CBSVoltage when reaching predetermined value, export the voltage of earth terminal as fourth drive signal TG4 and transistor M4 turned off.

Second switch circuit 212 is a transistor M5 (by taking N-channel transistor as an example), transistor M5 parasitic diode Anode and bootstrap capacitor CBSWith the points of common connection BS2 connections of precharge control circuit 21, the work(of negative electrode and synchronous boost circuits The tie point LX connections of lower switching tube M1 and upper switching tube M2 in rate level circuit.Transistor M5 parasitic diode is so connected The reason for be that it is possible to ensure to turn in transistor M4, when transistor M5 is turned off, the voltage at BS2 ends is maintained ground potential, without The voltage at LX ends is also pulled to ground potential by the conducting as the parasitic diode due to transistor M5.Transistor M5 is in bootstrap capacitor CBSShut-off is always maintained at when entering line precharge, until bootstrap capacitor CBSThe voltage at two ends is begun to turn on when reaching predetermined value.

Control on or off of the transistor M5 by the second logical signal LOGIC2.Specifically, this hair shown in Figure 4 The drive signal generation circuit of the second switch circuit of bright first embodiment.Driver DR4 is in the second logical signal LOGIC2 Gao Shi, i.e. bootstrap capacitor CBSWhen the voltage at two ends reaches predetermined value, bootstrap capacitor C is exportedBSOne end BS1 voltage conduct 5th drive signal TG5 causes transistor M5 to turn on;When the second logical signal LOGIC2 is low, i.e., in system electrification and power When level circuit starts working preceding or system in a dormant state, bootstrap capacitor C is exportedBSOther end BS2 voltage be used as Five drive signal TG5 cause transistor M5 to turn off.

It should be noted that:For N-channel transistor, the anode of its parasitic diode is in source terminal, and negative electrode is in leakage Extremely;And for p channel transistor, the anode of its parasitic diode is in drain electrode end, negative electrode is in source terminal.If therefore choosing P Channel transistor constitutes first switch circuit or second switch circuit, then can be according to the connection need in its parasitic diode direction Ask, change the connected mode of transistor.The type of drive of transistor, which is also required to make, correspondingly to be changed.

Driver DR2, to the control signal PWM2 according to upper switching tube, exports corresponding drive signal TG2 to control The conducting state of upper switching tube.Specifically, when upper switching tube M2 control signal PWM2 is high, driver DR2 output bootstrappings Electric capacity CBSWith institute burning voltage VDDThe tie point BS1 supreme switching tube M2 of voltage grid, now, the shut-off of lower switching tube are and upper The voltage at the LX ends of the source electrode connection of switching tube is clamped at input voltage vin, then tie point BS1 voltage is Vin and bootstrapping Electric capacity CBSVoltage difference between the sum of both end voltage, upper switching tube M2 grid source electrodes is bootstrap capacitor CBSThe voltage at two ends, as preliminary filling The predetermined value that the electric stage reaches, the predetermined value to enable a certain driving voltage value fully on switching tube M2, It is burning voltage V in the present embodimentDD, thus, it is possible to when upper switching tube M2 needs conducting, successfully drive upper switching tube M2 complete Full conducting;When upper switching tube M2 control signal PWM2 is low, the power stage electricity of driver DR2 output synchronization boost circuits The tie point LX of lower switching tube M1 and upper switching tube M2 in the road supreme switching tube M2 of voltage grid, upper switching tube M2 source Pole is also connected to LX ends, and now the voltage difference between upper switching tube M2 grid source electrodes is zero, can be turned it off.

Using the upper switch tube driving circuit shown in Fig. 2, before system electrification and power stage circuit are started working or it is When uniting in a dormant state, control enters line precharge by burning voltage to bootstrap capacitor, until the voltage at bootstrap capacitor two ends Predetermined value is reached, when main power circuit is started working, the driving voltage of upper switching tube disclosure satisfy that switching tube is led completely Logical requirement.So as to improve the control accuracy of system, and it can avoid because high current flows through the parasitism two of upper switching tube The problem of increase is lost caused by pole pipe.

Fig. 5 is the circuit diagram of the upper switch tube driving circuit of second embodiment of the invention.Upper switch tube driving circuit For driving synchronous boost circuits.

In the present embodiment, first switch circuit 211 is a switch K1, and switch K1 is connected to bootstrap capacitor CBSAnd precharge Between the tie point BS1 and ground that control circuit 21.K1 is switched before system electrification and power stage circuit are started working or system Turned on when in a dormant state, in bootstrap capacitor two ends CBSVoltage turn off when reaching predetermined value.K1 is switched by the first logic Signal LOGIC1 control on or off.

Second switch circuit 212 is a switch K2, and switch K2 is connected to bootstrap capacitor CBSWith precharge control circuit 21 Lower switching tube in the power stage circuit of tie point BS1 and the synchronous boost circuits and between the tie point LX of upper switching tube. K2 is switched in bootstrap capacitor CBSShut-off is always maintained at when entering line precharge, until bootstrap capacitor CBSThe voltage at two ends reaches predetermined Value when begin to turn on.Switch control on or off of the K2 by the second logical signal LOGIC2.

The other parts of circuit are identical with first embodiment, will not be repeated here.

The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for those skilled in the art For, the present invention can have various changes and change.It is all any modifications made within spirit and principles of the present invention, equivalent Replace, improve etc., it should be included in the scope of the protection.

Claims (8)

1. a kind of upper switch tube driving circuit, applied in synchronous boost circuits, the power stage of the synchronous boost circuits is electric Route inductance, lower switching tube and upper switching tube to constitute, the polar end ground connection of the lower switching tube, another polar end with it is described The polar end connection of upper switching tube, it is characterised in that the upper switch tube driving circuit includes:
Bootstrap capacitor, one end is connected to a burning voltage, and the other end is connected to one end of precharge control circuit;
The precharge control circuit, to before system electrification and power stage circuit are started working or system is in dormancy shape During state, control enters line precharge by the burning voltage to the bootstrap capacitor, until the voltage at bootstrap capacitor two ends reaches Predetermined value;
Driver, to the control signal according to upper switching tube, exports corresponding drive signal to control the conducting of upper switching tube State.
2. upper switch tube driving circuit according to claim 1, it is characterised in that the driver, is switched on described The control signal of pipe for it is high when, the grid of the voltage of output bootstrap capacitor and the burning voltage tie point to the upper switching tube Pole;
When the control signal of switching tube is low on described, opened under exporting in the power stage circuit of the synchronous boost circuits The voltage of the tie point of the upper switching tubes of Guan Guanhe to the upper switching tube grid.
3. upper switch tube driving circuit according to claim 1, it is characterised in that the precharge control circuit includes the One on-off circuit and second switch circuit, the first switch circuit before system electrification and power stage circuit are started working or System in a dormant state when turn on, the voltage at the bootstrap capacitor two ends is turned off when reaching predetermined value;
The second switch circuit is always maintained at shut-off when the bootstrap capacitor enters line precharge, until the bootstrap capacitor two The voltage at end is begun to turn on when reaching predetermined value.
4. upper switch tube driving circuit according to claim 3, it is characterised in that the first switch circuit is a crystal Pipe, the anode of the parasitic diode of the transistor is connected to the ground, negative electrode and the bootstrap capacitor and precharge control circuit Tie point is connected.
5. upper switch tube driving circuit according to claim 3, it is characterised in that the first switch circuit is opened for one Close, the switch is connected between the bootstrap capacitor and the tie point and ground of precharge control circuit.
6. upper switch tube driving circuit according to claim 3, it is characterised in that the second switch circuit is a crystal Pipe, the anode of the parasitic diode of the transistor is connected with the tie point of the bootstrap capacitor and precharge control circuit, cloudy Pole is connected with the tie point of the lower switching tube in the power stage circuit of the synchronous boost circuits and upper switching tube.
7. upper switch tube driving circuit according to claim 3, it is characterised in that the second switch circuit is opened for one Close, the switch is connected to the tie point and the work(of the synchronous boost circuits of the bootstrap capacitor and precharge control circuit Rate level circuit in lower switching tube and upper switching tube tie point between.
8. a kind of synchronous boost circuits, it is characterised in that including power stage circuit and according to any one of claim 1-7 institutes The upper switch tube driving circuit stated.
CN201510290741.2A 2015-06-01 2015-06-01 A kind of upper switch tube driving circuit and apply its synchronous boost circuits CN104917359B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109194117A (en) * 2018-08-27 2019-01-11 矽力杰半导体技术(杭州)有限公司 Multiple-channel output power inverter and its control method

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Publication number Priority date Publication date Assignee Title
CN101277061A (en) * 2007-03-27 2008-10-01 凌特公司 Synchronous rectifier control for synchronous boost converter
CN101785187A (en) * 2007-05-21 2010-07-21 先进模拟科技公司 Reduce the MOSFET gate drivers of power consumption
CN102570782A (en) * 2010-11-30 2012-07-11 英飞凌科技股份有限公司 System And Method For Bootstrapping A Switch Driver
CN102684462A (en) * 2012-05-31 2012-09-19 安徽工业大学 Novel low end metal oxide semiconductor field effect transistor (MOSFET)/ insulated gate bipolar transistor (IGBT) negative pressure clamping driving circuit and control method thereof
CN103683864A (en) * 2012-08-30 2014-03-26 英飞凌科技股份有限公司 Circuit arrangement for driving transistors in bridge circuits

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101277061A (en) * 2007-03-27 2008-10-01 凌特公司 Synchronous rectifier control for synchronous boost converter
CN101785187A (en) * 2007-05-21 2010-07-21 先进模拟科技公司 Reduce the MOSFET gate drivers of power consumption
CN102570782A (en) * 2010-11-30 2012-07-11 英飞凌科技股份有限公司 System And Method For Bootstrapping A Switch Driver
CN102684462A (en) * 2012-05-31 2012-09-19 安徽工业大学 Novel low end metal oxide semiconductor field effect transistor (MOSFET)/ insulated gate bipolar transistor (IGBT) negative pressure clamping driving circuit and control method thereof
CN103683864A (en) * 2012-08-30 2014-03-26 英飞凌科技股份有限公司 Circuit arrangement for driving transistors in bridge circuits

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Patentee after: Silergy Semiconductor Technology (Hangzhou ) Co., Ltd.

Address before: 310012 Science and Technology Building A1501, No. 90 Wensan Road, Hangzhou City, Zhejiang Province

Patentee before: Silergy Semiconductor Technology (Hangzhou ) Co., Ltd.

CP02 Change in the address of a patent holder