CN104883035A - Driving circuit for grid voltage of suspension switch tube - Google Patents
Driving circuit for grid voltage of suspension switch tube Download PDFInfo
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- CN104883035A CN104883035A CN201510254046.0A CN201510254046A CN104883035A CN 104883035 A CN104883035 A CN 104883035A CN 201510254046 A CN201510254046 A CN 201510254046A CN 104883035 A CN104883035 A CN 104883035A
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Abstract
The invention discloses a driving circuit for the grid voltage of a suspension switch tube. The driving circuit comprises a suspension switch circuit, an OC/OD switch, and an H bridge lower tube driving module. When the OC/OD switch is switched off, the suspension switch circuit provides driving signals capable of suspending the grid voltage for a driven H bridge upper tube, and the OC/OD switch is switched on; when the OC/OD switch is switched on, the suspension switch circuit provides turn-off signals for the switch tube, and the switch tube is rapidly turned off; the H bridge lower tube driving module provides two-channel input, and can flexibly provide switch driving for an H bridge lower tube and provide a settable dead zone for an H bridge, and the damage to the H bridge due to direct connection of an upper tube and a lower tube is prevented. The beneficial effects of the driving circuit are that the individual switch tube in need of suspension driving can be driven, the H bridge can also be driven with the cooperation of the lower tube, the damage to the H bridge due to direct connection of the upper tube and the lower tube is prevented, the driving loss is small, the driving speed is fast, the practicality is high, the usage is flexible, the size is small, the manufacturing cost is low, and the performance is stable and reliable.
Description
Technical field
The present invention relates to a kind of drive circuit of the switching tube grid voltage that suspends, relate to Drive Control Technique field.
Background technology
Switching Power Supply is with its small portable, efficiency high is widely used in actual life, when wanting Switching Power Supply to export relatively high power, the bridge architecture of Switching Power Supply is seen everywhere, and power switch pipe runs into the situation needing suspended grid voltage-driven switch pipe usually.Field is driven at motor, along with the development of intelligent equipment, DC brushless motor, the utilization of stepping motor and servomotor is also more and more wider, the work of these motors drives often by the structure of H bridge, usually, power tube also encounters the problem needing suspended grid voltage-driven switch pipe, and inverter is also the problem occurring needing suspended grid voltage-driven switch pipe equally in addition.
For solving the problem, taking of having drives with light-coupled isolation signal transmission, and it is little that it has volume, advantages of simple structure and simple, but there is the slow shortcoming of transmission speed.Some employing pulse transformers drive as isolated component, and it has the fast response time forward position rate of climb of the pulse (and rear along decrease speed), the dielectric strength advantages of higher of former secondary.But the maximum transmitted width of signal is by the restriction of magnetic saturation characteristic, and thus the top of signal is not easily transmitted.And pulse transformer volume is large, heavy, processed complex.And adopting pulse transformer to drive, its drive current is comparatively large, and loss is also relatively large.
Along with the continuous maturation of Driving technique, existing multiple integrated thick-film driver is released.As EXB840/841, EXB850/851, M57959L/AL, M57962L/AL, HR065 etc., what they adopted is light-coupled isolation, still by the restriction of above-mentioned shortcoming.The IR2110 driver that American I R company produces, although it has the advantage of light-coupled isolation (volume is little) and electromagnetic isolation (speed is fast) concurrently, the maximum power voltage driven is limited in below 600V, and cost is higher.
Summary of the invention
The object of the present invention is to provide a kind of drive circuit of the switching tube grid voltage that suspends, can the deficiencies in the prior art be overcome, drive one to need the independent switching tube driven that suspends, lower pipe also can be coordinated to drive and go to drive H bridge.
The object of the invention is to be achieved through the following technical solutions: a kind of drive circuit of the switching tube grid voltage that suspends, manage under the H bridge of pipe, needs driving on the H bridge that it to comprise on H bridge pipe driver module under pipe floating boom driver, H bridge, needs drive, pipe floating boom driver is provided with H bridge input H end, under H bridge, pipe driver module is provided with two-way input, be respectively input L end and input D end, described floating boom driver is made up of suspend switching circuit and OC/OD switch;
Wherein, described suspension switching circuit, it comprises charging diode D1, bootstrap capacitor C1, suspended voltage transmitting switch pipe Q1, drop-down discharge tube D2 and suspension pull-up resistor R3, suspended voltage transmitting switch pipe Q1 is NPN type triode, drop-down discharge tube D2 is diode, the positive pole of charging diode D1 connects power supply VCC1, negative pole is connected to bootstrap capacitor C1 one end, the collector electrode of suspended voltage transmitting switch pipe Q1 and suspension pull-up resistor R3, the other end of bootstrap capacitor C1 is connected to the output stage of pipe on H bridge, the base stage of suspended voltage transmitting switch pipe Q1 respectively with the other end of suspension pull-up resistor R3, the negative pole of drop-down discharge tube D2 is connected and OC/OD switch is connected, the emitter of suspended voltage transmitting switch pipe Q1 respectively with the positive pole of drop-down discharge tube D2, on H bridge, the control of pipe is extremely connected,
Described OC/OD switch has output stage, control pole and input pole, its output stage is connected to the base stage of suspended voltage transmitting switch pipe Q1, and the input H controlling very floating boom driver holds, input stage ground connection;
Pipe driver module under described H bridge, it comprises switching tube Q2, switching tube Q3, switching tube Q4, pull-up resistor R6, current-limiting resistance R7, current-limiting resistance R8, drop-down discharge tube D3, input L end and input D end, switching tube Q2, switching tube Q3 and switching tube Q4 is NPN type triode, drop-down discharge tube D3 is diode, the collector electrode of switching tube Q2 is connected to one end and the power supply VCC2 of pull-up resistor R6, the base stage of switching tube Q2 respectively connected the other end of pull-up resistor R6, the collector electrode of switching tube Q3, the collector electrode of switching tube Q4 and the negative pole of drop-down discharge tube D3, the control pole of pipe and the positive pole of drop-down discharge tube D3 under the emitter connection H bridge of switching tube Q2, the emitter of switching tube Q3 and the grounded emitter of switching tube Q4, the base stage of switching tube Q3 connects one end of current-limiting resistance R7, the other end of current-limiting resistance R7 is that the input L of pipe driver module under H bridge holds, the base stage of switching tube Q4 connects one end of current-limiting resistance R8, the other end of current-limiting resistance R8 is that the input D of pipe driver module under H bridge holds.
A kind of drive circuit of the switching tube grid voltage that suspends, manage under the H bridge of pipe, needs driving on the H bridge that it to comprise on H bridge pipe driver module under pipe floating boom driver, H bridge, needs drive, pipe floating boom driver is provided with H bridge input H end, under H bridge, pipe driver module is provided with two-way input, be respectively input L end and input D end, described floating boom driver is made up of suspend switching circuit and OC/OD switch;
Wherein, described suspension switching circuit, it comprises charging diode D1, bootstrap capacitor C1, suspended voltage transmitting switch pipe Q1, drop-down discharge tube D2 and suspension pull-up resistor R3, suspended voltage transmitting switch pipe Q1 is NPN type triode, drop-down discharge tube D2 is PNP type triode, the positive pole of charging diode D1 connects power supply VCC1, negative pole is connected to bootstrap capacitor C1 one end, the collector electrode of suspended voltage transmitting switch pipe Q1 and suspension pull-up resistor R3, the other end of bootstrap capacitor C1 respectively connected the output stage of pipe on the collector electrode of drop-down discharge tube D2 and H bridge, the base stage of suspended voltage transmitting switch pipe Q1 respectively with the other end of suspension pull-up resistor R3, the base stage of drop-down discharge tube D2 is connected and OC/OD switching circuit is connected, the emitter of suspended voltage transmitting switch pipe Q1 is connected to the emitter of drop-down discharge tube D2, the control pole of pipe on H bridge, the base stage of drop-down discharge tube D2 is connected to the output stage of OC/OD switches circuit, the collector electrode of drop-down discharge tube D2 is also connected to the output stage of pipe on H bridge,
Described OC/OD switch has output stage, control pole and input pole, its output stage is connected to the base stage of suspended voltage transmitting switch pipe Q1, and the input H controlling very floating boom driver holds, input stage ground connection;
Pipe driver module under described H bridge, it comprises switching tube Q2, switching tube Q3, switching tube Q4, pull-up resistor R6, current-limiting resistance R7, current-limiting resistance R8, drop-down discharge tube D3, input L end and input D end, switching tube Q2, switching tube Q3 and switching tube Q4 is NPN type triode, drop-down discharge tube D3 is diode, the collector electrode of switching tube Q2 is connected to one end and the power supply VCC2 of pull-up resistor R6, the base stage of switching tube Q2 respectively connected the other end of pull-up resistor R6, the collector electrode of switching tube Q3, the collector electrode of switching tube Q4 and the negative pole of drop-down discharge tube D3, the control pole of pipe 8 and the positive pole of drop-down discharge tube D3 under the emitter connection H bridge of switching tube Q2, the emitter of switching tube Q3 and the grounded emitter of switching tube Q4, the base stage of switching tube Q3 connects one end of current-limiting resistance R7, the other end of current-limiting resistance R7 is that the input L of pipe driver module under H bridge holds, the base stage of switching tube Q4 connects one end of current-limiting resistance R8, the other end of current-limiting resistance R8 is that the input D of pipe driver module under H bridge holds.
A kind of drive circuit of the switching tube grid voltage that suspends, manage under the H bridge of pipe, needs driving on the H bridge that it to comprise on H bridge pipe driver module under pipe floating boom driver, H bridge, needs drive, pipe floating boom driver is provided with H bridge input H end, under H bridge, pipe driver module is provided with two-way input, be respectively input L end and input D end, described floating boom driver is made up of suspend switching circuit and OC/OD switch;
Wherein, described suspension switching circuit, it comprises charging diode D1, bootstrap capacitor C1, suspended voltage transmitting switch pipe Q1, drop-down discharge tube D2 and suspension pull-up resistor R3, suspended voltage transmitting switch pipe Q1 is NPN type triode, drop-down discharge tube D2 is diode, the positive pole of charging diode D1 connects power supply VCC1, negative pole is connected to bootstrap capacitor C1 one end, the collector electrode of suspended voltage transmitting switch pipe Q1 and suspension pull-up resistor R3, the other end of bootstrap capacitor C1 is connected to the output stage of pipe on H bridge, the base stage of suspended voltage transmitting switch pipe Q1 respectively with the other end of suspension pull-up resistor R3, the negative pole of drop-down discharge tube D2 is connected and OC/OD switch is connected, the emitter of suspended voltage transmitting switch pipe Q1 respectively with the positive pole of drop-down discharge tube D2, on H bridge, the control of pipe is extremely connected,
Described OC/OD switch has output stage, control pole and input pole, its output stage is connected to the base stage of suspended voltage transmitting switch pipe Q1, and the input H controlling very floating boom driver holds, input stage ground connection;
Pipe driver module under described H bridge, it comprises switching tube Q2, switching tube Q3, switching tube Q4, pull-up resistor R6, current-limiting resistance R7, current-limiting resistance R8, drop-down discharge tube D3, input L end and input D end, switching tube Q2, switching tube Q3 and switching tube Q4 is NPN type triode, drop-down discharge tube D3 is PNP type triode, the collector electrode of switching tube Q2 is connected to one end and the power supply VCC2 of pull-up resistor R6, the base stage of switching tube Q2 respectively connected the other end of pull-up resistor R6, the collector electrode of switching tube Q3, the collector electrode of switching tube Q4 and the base stage of drop-down discharge tube D3, the control pole of pipe and the emitter of drop-down discharge tube D3 under the emitter connection H bridge of switching tube Q2, the emitter of switching tube Q3 and the grounded emitter of switching tube Q4, the base stage of switching tube Q3 connects one end of current-limiting resistance R7, the other end of current-limiting resistance R7 is that the input L of pipe driver module under H bridge holds, the base stage of switching tube Q4 connects one end of current-limiting resistance R8, the other end of current-limiting resistance R8 is that the input D of pipe driver module under H bridge holds, the grounded collector of drop-down discharge tube D3 or the output stage of pipe under being connected to H bridge.
A kind of drive circuit of the switching tube grid voltage that suspends, manage under the H bridge of pipe, needs driving on the H bridge that it to comprise on H bridge pipe driver module under pipe floating boom driver, H bridge, needs drive, pipe floating boom driver is provided with H bridge input H end, under H bridge, pipe driver module is provided with two-way input, be respectively input L end and input D end, described floating boom driver is made up of suspend switching circuit and OC/OD switch;
Wherein, described suspension switching circuit, it comprises charging diode D1, bootstrap capacitor C1, suspended voltage transmitting switch pipe Q1, drop-down discharge tube D2 and suspension pull-up resistor R3, suspended voltage transmitting switch pipe Q1 is NPN type triode, drop-down discharge tube D2 is PNP type triode, the positive pole of charging diode D1 connects power supply VCC1, negative pole is connected to bootstrap capacitor C1 one end, the collector electrode of suspended voltage transmitting switch pipe Q1 and suspension pull-up resistor R3, the other end of bootstrap capacitor C1 respectively connected the output stage of pipe on the collector electrode of drop-down discharge tube D2 and H bridge, the base stage of suspended voltage transmitting switch pipe Q1 respectively with the other end of suspension pull-up resistor R3, the base stage of drop-down discharge tube D2 is connected and OC/OD switching circuit is connected, the emitter of suspended voltage transmitting switch pipe Q1 is connected to the emitter of drop-down discharge tube D2, the control pole of pipe on H bridge, the base stage of drop-down discharge tube D2 is connected to the output stage of OC/OD switches circuit, the collector electrode of drop-down discharge tube D2 is also connected to the output stage of pipe on H bridge,
Described OC/OD switch has output stage, control pole and input pole, its output stage is connected to the base stage of suspended voltage transmitting switch pipe Q1, and the input H controlling very floating boom driver holds, input stage ground connection;
Pipe driver module under described H bridge, it comprises switching tube Q2, switching tube Q3, switching tube Q4, pull-up resistor R6, current-limiting resistance R7, current-limiting resistance R8, drop-down discharge tube D3, input L end and input D end, switching tube Q2, switching tube Q3 and switching tube Q4 is NPN type triode, drop-down discharge tube D3 is PNP type triode, the collector electrode of switching tube Q2 is connected to one end and the power supply VCC2 of pull-up resistor R6, the base stage of switching tube Q2 respectively connected the other end of pull-up resistor R6, the collector electrode of switching tube Q3, the collector electrode of switching tube Q4 and the base stage of drop-down discharge tube D3, the control pole of pipe and the emitter of drop-down discharge tube D3 under the emitter connection H bridge of switching tube Q2, the emitter of switching tube Q3 and the grounded emitter of switching tube Q4, the base stage of switching tube Q3 connects one end of current-limiting resistance R7, the other end of current-limiting resistance R7 is that the input L of pipe driver module under H bridge holds, the base stage of switching tube Q4 connects one end of current-limiting resistance R8, the other end of current-limiting resistance R8 is that the input D of pipe driver module under H bridge holds, the grounded collector of drop-down discharge tube D3 or the output stage of pipe under being connected to H bridge.
Described H bridge is managed and pipe employing field effect transistor or IGBT pipe under H bridge, wherein, when on H bridge, under pipe, H bridge, pipe is field effect transistor, its output very its source S pole, grid is control pole; When on H bridge, under pipe, H bridge, pipe is for IGBT pipe, it exports very its E pole, and grid is control pole.
Described power supply VCC1 and power supply VCC2 is separate or be same power supply, as long as the two to be respectively on H bridge pipe under pipe and H bridge provide normal gate drive voltage.
Described OC/OD switch adopts NPN type triode, NMOS field effect transistor or IGBT pipe, wherein, when OC/OD switch adopts NPN type triode, the output stage of OC/OD switch, control pole and input pole be respectively collector electrode C, the base stage B of NPN type triode of employing and emitter E; When OC/OD switch adopts NMOS field effect transistor, the output stage of OC/OD switch, control pole and input pole and be respectively the leakage D of adopted NMOS field effect transistor, grid G and source S; When OC/OD switch adopts IGBT during type triode, the output stage of OC/OD switch, control pole and input pole be respectively employing IGBT pipe collector electrode C, grid G and emitter E.
Current-limiting resistance R1 and current resistor R2 is connected to after the emitter and collector of described drop-down discharge tube D2, current-limiting resistance R4 and current resistor R5 is connected to after the emitter and collector of drop-down discharge tube D3, described R1, R2, R4 and R5 are not necessary, R1 and R4 can short circuit, R2 and R5 can directly delete need not.
Beneficial effect of the present invention is: one can be driven to need the independent switching tube driven that suspends, also lower pipe can be coordinated to drive and to go to drive H bridge, avoid H bridge to damage because managing straight-through up and down, and it is little to have driving loss, actuating speed is fast, practical, use flexibly, volume is little, and cost of manufacture is low, feature stable and reliable for performance.
Accompanying drawing explanation
Fig. 1 is structure chart of the present invention;
Fig. 2 is the present invention drop-down discharge tube D2 when being diode, the circuit diagram of suspension switching circuit;
Fig. 3 is the present invention drop-down discharge tube D2 when being PNP triode, the schematic diagram of suspension switching circuit;
Fig. 4 is the present invention drop-down discharge tube D3 when being diode, the schematic diagram of pipe driver module under H bridge;
Fig. 5 is the present invention drop-down discharge tube D3 when being PNP triode, the schematic diagram of pipe driver module under H bridge;
Fig. 6 is OC/OD switch of the present invention is the schematic diagram of NPN type triode;
The schematic diagram of Fig. 7 to be OC/OD switch of the present invention be NMOS field effect transistor;
The schematic diagram of Fig. 8 to be OC/OD switch of the present invention be IGBT pipe.
Wherein, 1-suspension switching circuit, 2-OC/OD switch, pipe floating boom driver on 3-H bridge, pipe driver module under 4-H bridge, of 5-H bridge construction, 6-power termination, 7-H bridge is managed, and manages under 8-H bridge.
Embodiment
Technical scheme of the present invention is further described below in conjunction with accompanying drawing, but described in claimed scope is not limited to.
As shown in Figure 1, Figure 2, a kind of drive circuit of the switching tube grid voltage that suspends, pipe 8 under the H bridge of pipe 7, needs driving on the H bridge that it to comprise on H bridge pipe driver module 4 under pipe floating boom driver 3, H bridge, needs drive, pipe floating boom driver 3 is provided with H bridge input H end, under H bridge, pipe driver module 4 is provided with two-way input, be respectively input L end and input D end, described floating boom driver 3 is made up of suspension switching circuit 1 and OC/OD switch 2, and on H bridge, under pipe 7 and H bridge, pipe 8 constitutes one 5 in H bridge construction;
Wherein, described suspension switching circuit 1, it comprises charging diode D1, bootstrap capacitor C1, suspended voltage transmitting switch pipe Q1, drop-down discharge tube D2 and suspension pull-up resistor R3, suspended voltage transmitting switch pipe Q1 is NPN type triode, drop-down discharge tube D2 is diode, the positive pole of charging diode D1 connects power supply VCC1, negative pole is connected to bootstrap capacitor C1 one end, the collector electrode of suspended voltage transmitting switch pipe Q1 and suspension pull-up resistor R3, the other end of bootstrap capacitor C1 is connected to the output stage of pipe 7 on H bridge, the base stage of suspended voltage transmitting switch pipe Q1 respectively with the other end of suspension pull-up resistor R3, the negative pole of drop-down discharge tube D2 is connected and OC/OD switch 2 is connected, the emitter of suspended voltage transmitting switch pipe Q1 respectively with the positive pole of drop-down discharge tube D2, on H bridge, the control of pipe 7 is extremely connected,
Described OC/OD switch 2 has output stage, control pole and input pole, its output stage is connected to the base stage of suspended voltage transmitting switch pipe Q1, and the input H controlling very floating boom driver 3 holds, input stage ground connection;
Pipe driver module 4 under described H bridge, it comprises switching tube Q2, switching tube Q3, switching tube Q4, pull-up resistor R6, current-limiting resistance R7, current-limiting resistance R8, drop-down discharge tube D3, input L end and input D end, switching tube Q2, switching tube Q3 and switching tube Q4 is NPN type triode, drop-down discharge tube D3 is diode, the collector electrode of switching tube Q2 is connected to one end and the power supply VCC2 of pull-up resistor R6, the base stage of switching tube Q2 respectively connected the other end of pull-up resistor R6, the collector electrode of switching tube Q3, the collector electrode of switching tube Q4 and the negative pole of drop-down discharge tube D3, the control pole of pipe 8 and the positive pole of drop-down discharge tube D3 under the emitter connection H bridge of switching tube Q2, the emitter of switching tube Q3 and the grounded emitter of switching tube Q4, the base stage of switching tube Q3 connects one end of current-limiting resistance R7, the other end of current-limiting resistance R7 is that the input L of pipe driver module 4 under H bridge holds, the base stage of switching tube Q4 connects one end of current-limiting resistance R8, the other end of current-limiting resistance R8 is that the input D of pipe driver module 4 under H bridge holds.
As Fig. 3, a kind of drive circuit of the switching tube grid voltage that suspends, pipe 8 under the H bridge of pipe 7, needs driving on the H bridge that it to comprise on H bridge pipe driver module 4 under pipe floating boom driver 3, H bridge, needs drive, pipe floating boom driver 3 is provided with H bridge input H end, under H bridge, pipe driver module 4 is provided with two-way input, be respectively input L end and input D end, described floating boom driver 3 is made up of suspension switching circuit 1 and OC/OD switch 2, and on H bridge, under pipe 7 and H bridge, pipe 8 constitutes one 5 in H bridge construction;
Wherein, described suspension switching circuit 1, it comprises charging diode D1, bootstrap capacitor C1, suspended voltage transmitting switch pipe Q1, drop-down discharge tube D2 and suspension pull-up resistor R3, suspended voltage transmitting switch pipe Q1 is NPN type triode, drop-down discharge tube D2 is PNP type triode, the positive pole of charging diode D1 connects power supply VCC1, negative pole is connected to bootstrap capacitor C1 one end, the collector electrode of suspended voltage transmitting switch pipe Q1 and suspension pull-up resistor R3, the other end of bootstrap capacitor C1 respectively connected the output stage of pipe 7 on the collector electrode of drop-down discharge tube D2 and H bridge, the base stage of suspended voltage transmitting switch pipe Q1 respectively with the other end of suspension pull-up resistor R3, the base stage of drop-down discharge tube D2 is connected and OC/OD switching circuit 2 is connected, the emitter of suspended voltage transmitting switch pipe Q1 is connected to the emitter of drop-down discharge tube D2, the control pole of pipe 7 on H bridge, the base stage of drop-down discharge tube D2 is connected to the output stage of OC/OD switches circuit 2, the collector electrode of drop-down discharge tube D2 is also connected to the output stage of pipe 7 on H bridge,
Described OC/OD switch 2 has output stage, control pole and input pole, its output stage is connected to the base stage of suspended voltage transmitting switch pipe Q1, and the input H controlling very floating boom driver 3 holds, input stage ground connection;
Pipe driver module 4 under described H bridge, it comprises switching tube Q2, switching tube Q3, switching tube Q4, pull-up resistor R6, current-limiting resistance R7, current-limiting resistance R8, drop-down discharge tube D3, input L end and input D end, switching tube Q2, switching tube Q3 and switching tube Q4 is NPN type triode, drop-down discharge tube D3 is diode, the collector electrode of switching tube Q2 is connected to one end and the power supply VCC2 of pull-up resistor R6, the base stage of switching tube Q2 respectively connected the other end of pull-up resistor R6, the collector electrode of switching tube Q3, the collector electrode of switching tube Q4 and the negative pole of drop-down discharge tube D3, the control pole of pipe 8 and the positive pole of drop-down discharge tube D3 under the emitter connection H bridge of switching tube Q2, the emitter of switching tube Q3 and the grounded emitter of switching tube Q4, the base stage of switching tube Q3 connects one end of current-limiting resistance R7, the other end of current-limiting resistance R7 is that the input L of pipe driver module 4 under H bridge holds, the base stage of switching tube Q4 connects one end of current-limiting resistance R8, the other end of current-limiting resistance R8 is that the input D of pipe driver module 4 under H bridge holds.
As Fig. 4, a kind of drive circuit of the switching tube grid voltage that suspends, pipe 8 under the H bridge of pipe 7, needs driving on the H bridge that it to comprise on H bridge pipe driver module 4 under pipe floating boom driver 3, H bridge, needs drive, pipe floating boom driver 3 is provided with H bridge input H end, under H bridge, pipe driver module 4 is provided with two-way input, be respectively input L end and input D end, described floating boom driver 3 is made up of suspension switching circuit 1 and OC/OD switch 2, and on H bridge, under pipe 7 and H bridge, pipe 8 constitutes one 5 in H bridge construction;
Wherein, described suspension switching circuit 1, it comprises charging diode D1, bootstrap capacitor C1, suspended voltage transmitting switch pipe Q1, drop-down discharge tube D2 and suspension pull-up resistor R3, suspended voltage transmitting switch pipe Q1 is NPN type triode, drop-down discharge tube D2 is diode, the positive pole of charging diode D1 connects power supply VCC1, negative pole is connected to bootstrap capacitor C1 one end, the collector electrode of suspended voltage transmitting switch pipe Q1 and suspension pull-up resistor R3, the other end of bootstrap capacitor C1 is connected to the output stage of pipe 7 on H bridge, the base stage of suspended voltage transmitting switch pipe Q1 respectively with the other end of suspension pull-up resistor R3, the negative pole of drop-down discharge tube D2 is connected and OC/OD switch 2 is connected, the emitter of suspended voltage transmitting switch pipe Q1 respectively with the positive pole of drop-down discharge tube D2, on H bridge, the control of pipe 7 is extremely connected,
Described OC/OD switch 2 has output stage, control pole and input pole, its output stage is connected to the base stage of suspended voltage transmitting switch pipe Q1, and the input H controlling very floating boom driver 3 holds, input stage ground connection;
Pipe driver module 4 under described H bridge, it comprises switching tube Q2, switching tube Q3, switching tube Q4, pull-up resistor R6, current-limiting resistance R7, current-limiting resistance R8, drop-down discharge tube D3, input L end and input D end, switching tube Q2, switching tube Q3 and switching tube Q4 is NPN type triode, drop-down discharge tube D3 is PNP type triode, the collector electrode of switching tube Q2 is connected to one end and the power supply VCC2 of pull-up resistor R6, the base stage of switching tube Q2 respectively connected the other end of pull-up resistor R6, the collector electrode of switching tube Q3, the collector electrode of switching tube Q4 and the base stage of drop-down discharge tube D3, the control pole of pipe 8 and the emitter of drop-down discharge tube D3 under the emitter connection H bridge of switching tube Q2, the emitter of switching tube Q3 and the grounded emitter of switching tube Q4, the base stage of switching tube Q3 connects one end of current-limiting resistance R7, the other end of current-limiting resistance R7 is that the input L of pipe driver module 4 under H bridge holds, the base stage of switching tube Q4 connects one end of current-limiting resistance R8, the other end of current-limiting resistance R8 is that the input D of pipe driver module 4 under H bridge holds, the grounded collector of drop-down discharge tube D3 or the output stage of pipe 8 under being connected to H bridge.
As Fig. 5, a kind of drive circuit of the switching tube grid voltage that suspends, pipe 8 under the H bridge of pipe 7, needs driving on the H bridge that it to comprise on H bridge pipe driver module 4 under pipe floating boom driver 3, H bridge, needs drive, pipe floating boom driver 3 is provided with H bridge input H end, under H bridge, pipe driver module 4 is provided with two-way input, be respectively input L end and input D end, described floating boom driver 3 is made up of suspension switching circuit 1 and OC/OD switch 2, and on H bridge, under pipe 7 and H bridge, pipe 8 constitutes one 5 in H bridge construction;
Wherein, described suspension switching circuit 1, it comprises charging diode D1, bootstrap capacitor C1, suspended voltage transmitting switch pipe Q1, drop-down discharge tube D2 and suspension pull-up resistor R3, suspended voltage transmitting switch pipe Q1 is NPN type triode, drop-down discharge tube D2 is PNP type triode, the positive pole of charging diode D1 connects power supply VCC1, negative pole is connected to bootstrap capacitor C1 one end, the collector electrode of suspended voltage transmitting switch pipe Q1 and suspension pull-up resistor R3, the other end of bootstrap capacitor C1 respectively connected the output stage of pipe 7 on the collector electrode of drop-down discharge tube D2 and H bridge, the base stage of suspended voltage transmitting switch pipe Q1 respectively with the other end of suspension pull-up resistor R3, the base stage of drop-down discharge tube D2 is connected and OC/OD switching circuit 2 is connected, the emitter of suspended voltage transmitting switch pipe Q1 is connected to the emitter of drop-down discharge tube D2, the control pole of pipe 7 on H bridge, the base stage of drop-down discharge tube D2 is connected to the output stage of OC/OD switches circuit 2, the collector electrode of drop-down discharge tube D2 is also connected to the output stage of pipe 7 on H bridge,
Described OC/OD switch 2 has output stage, control pole and input pole, its output stage is connected to the base stage of suspended voltage transmitting switch pipe Q1, and the input H controlling very floating boom driver 3 holds, input stage ground connection;
Pipe driver module 4 under described H bridge, it comprises switching tube Q2, switching tube Q3, switching tube Q4, pull-up resistor R6, current-limiting resistance R7, current-limiting resistance R8, drop-down discharge tube D3, input L end and input D end, switching tube Q2, switching tube Q3 and switching tube Q4 is NPN type triode, drop-down discharge tube D3 is PNP type triode, the collector electrode of switching tube Q2 is connected to one end and the power supply VCC2 of pull-up resistor R6, the base stage of switching tube Q2 respectively connected the other end of pull-up resistor R6, the collector electrode of switching tube Q3, the collector electrode of switching tube Q4 and the base stage of drop-down discharge tube D3, the control pole of pipe 8 and the emitter of drop-down discharge tube D3 under the emitter connection H bridge of switching tube Q2, the emitter of switching tube Q3 and the grounded emitter of switching tube Q4, the base stage of switching tube Q3 connects one end of current-limiting resistance R7, the other end of current-limiting resistance R7 is that the input L of pipe driver module 4 under H bridge holds, the base stage of switching tube Q4 connects one end of current-limiting resistance R8, the other end of current-limiting resistance R8 is that the input D of pipe driver module 4 under H bridge holds, the grounded collector of drop-down discharge tube D3 or the output stage of pipe 8 under being connected to H bridge.
On described H bridge, under pipe 7 and H bridge, pipe 8 adopts field effect transistor or IGBT pipe, and wherein, when on H bridge, under pipe 7, H bridge, pipe 8 be field effect transistor, it exports very its source S pole, and grid is control pole; When on H bridge, under pipe 7, H bridge, pipe 8 is IGBT pipe, it exports very its E pole, and grid is for controlling pole.
Described power supply VCC1 and power supply VCC2 is separate or be same power supply, as long as the two to be respectively on H bridge pipe 8 under pipe 7 and H bridge provide normal gate drive voltage.
Described OC/OD switch 2 adopts NPN type triode, NMOS field effect transistor or IGBT to manage, wherein, as Fig. 6, when OC/OD switch 2 adopts NPN type triode, the output stage of OC/OD switch 2, control pole and input pole be respectively collector electrode C, the base stage B of NPN type triode of employing and emitter E; As Fig. 7, when OC/OD switch 2 adopts NMOS field effect transistor, the output stage of OC/OD switch 2, control pole and input pole and be respectively the leakage D of adopted NMOS field effect transistor, grid G and source S; As Fig. 8, when OC/OD switch 2 adopts IGBT during type triode, the output stage of OC/OD switch 2, control pole and input pole be respectively employing IGBT pipe collector electrode C, grid G and emitter E.
Current-limiting resistance R1 and current resistor R2 is connected to after the emitter and collector of described drop-down discharge tube D2, it is not necessary for being connected to R1, R2, R4 and R5 described in current-limiting resistance R4 and current resistor R5 after the emitter and collector of drop-down discharge tube D3, R1 and R4 can short circuit, R2 and R5 can directly delete need not.
On described H bridge, the operation principle of pipe floating boom driver 3 is such, operationally, on H bridge, the voltage waveform of the output of pipe 7 is high level is VCCH, low level is the square wave of GND, when this square wave is low level, power supply VCC1 is charged to bootstrap capacitor C1 by charging diode D1, when ignoring the tube voltage drop of charging diode D1, C1 bootstrap capacitor two ends after charging have the voltage of power supply VCC1, when OC/OD switch 2 input H control under output high impedance ground connection time, drop-down discharge tube D2 is turned off by reverse bias, described suspended voltage transmitting switch pipe Q1 is opened under the effect of suspension pull-up resistor R3, thus make power supply VCC1 be transported to the control pole (grid G) of pipe 7 on H bridge by charging diode D1 and suspended voltage transmitting switch pipe Q1 always, for on H bridge, pipe 7 provides driving voltage, thus pipe 77 on H bridge is opened, power supply is provided to power termination 6, now on H bridge, the voltage of the output stage of pipe 7 will raise rapidly and levels off to VCCH, the voltage of charging diode D1 negative pole is elevated as VCCH+VCC1 is (in perfect condition by bootstrap capacitor C1 simultaneously, ignore desired voltage when pipe 7 and charging diode D1 pipe pressure on H bridge), charging diode D1 is reverse-biased and stop bootstrap capacitor C1 to be discharged by charging diode D1, the voltage of bootstrap capacitor C1 is made to continue to provide power supply to pipe 7 on H bridge, certain capacity is reached at bootstrap capacitor C1, on H bridge the opening time of pipe switching tube 7 within the specific limits time, can to think on bootstrap capacitor C1 the voltage VCC1 that fills just float in the grid G of pipe 7 on H bridge always, make pipe 7 on H bridge can continue when not receiving shutdown signal to open, when OC/OD switch 2 exports Low ESR ground connection under the control inputting H, control pole (base stage B) voltage of suspended voltage transmitting switch pipe Q1 is by OC/OD switch 2 grounding shunt, suspended voltage transmitting switch pipe Q1 turns off, now, following pulling fulgurite D2 opens because obtaining positive bias, electricity in the grid capacitance of pipe 7 inside on H bridge is bled off rapidly by drop-down discharge tube D2, thus pipe 7 on H bridge is turned off, pipe 7 pairs of power terminations 6 on H bridge are stopped to provide the power supply of VCCH, then on H bridge will there is low level in the output stage of pipe 7, bootstrap capacitor C1 is charged by charging diode D1 again, for next cycle provides the continuous voltage of driving dimension to prepare to pipe 7 on H bridge, thus ensure that on described H bridge, pipe floating boom driver 3 continual work under the control of its input H is gone down.
Under H bridge, the operation principle of pipe driver module 4 is such, when inputting L and input D is low level simultaneously, switching tube Q3 and switching tube Q4 output high impedance ground connection, drop-down discharge tube D3 is turned off by reverse bias, switching tube Q2 is opened under the effect of pull-up resistor R6, the grid that power supply VCC2 is provided to pipe 8 under H bridge by switching tube Q2 provides driving voltage, thus under making H bridge, pipe 8 is opened, and provides power supply electronegative potential to power termination 6.When input L or input D is high level, or when being all high level, the control pole (base stage B) of Q2 will be Low ESR ground connection, now switching tube Q2 is turned off, drop-down discharge tube D3 can open because obtaining positive bias, electricity under H bridge on pipe 8 internal gate electric capacity is bled off fast, thus pipe 8 under turning off H bridge, thus stop providing energy to power termination 6, visible, under H bridge, pipe driver module 4 provides two-way input, it coordinates input H, can flexibly for pipe 8 under H bridge provides switch drive, and provide the dead band that can arrange for H bridge, H bridge is avoided to damage because managing straight-through up and down.
Because the present invention adopts discrete device to design, the switching tube only need choosing applicable OC/OD and the charging diode D1 be applicable to can spirit and driving power supply voltage be just the system of VCCH.
To sum up, when driving H bridge with the present invention, as access after the signals reverse of input L is inputted H, be low level as inputted D, so when input L is high level, on H bridge, pipe 7 can be opened, and pipe 8 will turn off under H bridge, when being low level as inputted L, on H bridge, pipe 7 can turn off, and pipe 8 will be opened under H bridge, the signal of input L can under pipe 7 and H bridge, pipe 8 is independent on control H bridge switching, pipe 8 under pipe 7 and H bridge to be made again on H bridge to be unlikely to be opened by driving simultaneously, so, even the circuit of controlling dead error has been made mistakes, also the power switch pipe of composition H bridge can be reduced to greatest extent because (as pipe 8 under H bridge) leads directly to and the risk of infringement under upper (as pipe 7 on H bridge), and, when input L is low level, can input high level be held from input D and force lower pipe (H bridge pipe 7) also to turn off, realize managing the dead band all turned off up and down, hold this high level signal provided dead zone signals input D so do not put.
Can know from description above, the present invention not only can good floating boom driving switch pipe, and when driving H bridge with the present invention, also by arranging independent dead zone signals to arrange Dead Time, and can also when system fault, the risk that the power switch pipe reducing composition H bridge to greatest extent damages because of straight-through.The present invention can drive one to need the independent switching tube driven that suspends, and lower pipe also can be coordinated to drive and go to drive H bridge.
Specific embodiment described herein is only to the present invention's explanation for example.Those skilled in the art can make amendment miscellaneous or supplement or adopt similar mode to substitute to described specific embodiment, but can not depart from spirit of the present invention or surmount the scope that appended claims defines.All employings are equal to the technical scheme of replacement or equivalent deformation formation, all drop on the protection range of the claims in the present invention.
Claims (8)
1. the drive circuit of switching tube grid voltage that suspends, it is characterized in that: under the H bridge that on the H bridge that it to comprise on H bridge pipe driver module (4) under pipe floating boom driver (3), H bridge, needs drive, pipe (7), needs drive, manage (8), pipe floating boom driver (3) is provided with H bridge input H end, under H bridge, pipe driver module (4) is provided with two-way input, be respectively input L end and input D end, described floating boom driver (3) is made up of suspension switching circuit (1) and OC/OD switch (2);
Wherein, described suspension switching circuit (1), it comprises charging diode D1, bootstrap capacitor C1, suspended voltage transmitting switch pipe Q1, drop-down discharge tube D2 and suspension pull-up resistor R3, suspended voltage transmitting switch pipe Q1 is NPN type triode, drop-down discharge tube D2 is diode, the positive pole of charging diode D1 connects power supply VCC1, negative pole is connected to bootstrap capacitor C1 one end, the collector electrode of suspended voltage transmitting switch pipe Q1 and suspension pull-up resistor R3, the other end of bootstrap capacitor C1 is connected to the output stage of H bridge being managed (7), the base stage of suspended voltage transmitting switch pipe Q1 respectively with the other end of suspension pull-up resistor R3, the negative pole of drop-down discharge tube D2 is connected and OC/OD switch (2) is connected, the emitter of suspended voltage transmitting switch pipe Q1 respectively with the positive pole of drop-down discharge tube D2, the control of H bridge being managed (7) is extremely connected,
Described OC/OD switch (2) has output stage, control pole and input pole, its output stage is connected to the base stage of suspended voltage transmitting switch pipe Q1, and the input H controlling very floating boom driver (3) holds, input stage ground connection;
Pipe driver module (4) under described H bridge, it comprises switching tube Q2, switching tube Q3, switching tube Q4, pull-up resistor R6, current-limiting resistance R7, current-limiting resistance R8, drop-down discharge tube D3, input L end and input D end, switching tube Q2, switching tube Q3 and switching tube Q4 is NPN type triode, drop-down discharge tube D3 is diode, the collector electrode of switching tube Q2 is connected to one end and the power supply VCC2 of pull-up resistor R6, the base stage of switching tube Q2 respectively connected the other end of pull-up resistor R6, the collector electrode of switching tube Q3, the collector electrode of switching tube Q4 and the negative pole of drop-down discharge tube D3, the pipe control pole of (8) and the positive pole of drop-down discharge tube D3 under the emitter connection H bridge of switching tube Q2, the emitter of switching tube Q3 and the grounded emitter of switching tube Q4, the base stage of switching tube Q3 connects one end of current-limiting resistance R7, the other end of current-limiting resistance R7 is that the input L of pipe driver module (4) under H bridge holds, the base stage of switching tube Q4 connects one end of current-limiting resistance R8, the other end of current-limiting resistance R8 is that the input D of pipe driver module (4) under H bridge holds.
2. the drive circuit of switching tube grid voltage that suspends, it is characterized in that: under the H bridge that on the H bridge that it to comprise on H bridge pipe driver module (4) under pipe floating boom driver (3), H bridge, needs drive, pipe (7), needs drive, manage (8), pipe floating boom driver (3) is provided with H bridge input H end, under H bridge, pipe driver module (4) is provided with two-way input, be respectively input L end and input D end, described floating boom driver (3) is made up of suspension switching circuit (1) and OC/OD switch (2);
Wherein, described suspension switching circuit (1), it comprises charging diode D1, bootstrap capacitor C1, suspended voltage transmitting switch pipe Q1, drop-down discharge tube D2 and suspension pull-up resistor R3, suspended voltage transmitting switch pipe Q1 is NPN type triode, drop-down discharge tube D2 is PNP type triode, the positive pole of charging diode D1 connects power supply VCC1, negative pole is connected to bootstrap capacitor C1 one end, the collector electrode of suspended voltage transmitting switch pipe Q1 and suspension pull-up resistor R3, the other end of bootstrap capacitor C1 respectively connected the output stage of pipe (7) on the collector electrode of drop-down discharge tube D2 and H bridge, the base stage of suspended voltage transmitting switch pipe Q1 respectively with the other end of suspension pull-up resistor R3, the base stage of drop-down discharge tube D2 is connected and OC/OD switching circuit (2) is connected, the emitter of suspended voltage transmitting switch pipe Q1 is connected to the emitter of drop-down discharge tube D2, H bridge is managed the control pole of (7), the base stage of drop-down discharge tube D2 is connected to the output stage of OC/OD switches circuit (2), the collector electrode of drop-down discharge tube D2 is also connected to the output stage of H bridge being managed (7),
Described OC/OD switch (2) has output stage, control pole and input pole, its output stage is connected to the base stage of suspended voltage transmitting switch pipe Q1, and the input H controlling very floating boom driver (3) holds, input stage ground connection;
Pipe driver module (4) under described H bridge, it comprises switching tube Q2, switching tube Q3, switching tube Q4, pull-up resistor R6, current-limiting resistance R7, current-limiting resistance R8, drop-down discharge tube D3, input L end and input D end, switching tube Q2, switching tube Q3 and switching tube Q4 is NPN type triode, drop-down discharge tube D3 is diode, the collector electrode of switching tube Q2 is connected to one end and the power supply VCC2 of pull-up resistor R6, the base stage of switching tube Q2 respectively connected the other end of pull-up resistor R6, the collector electrode of switching tube Q3, the collector electrode of switching tube Q4 and the negative pole of drop-down discharge tube D3, the pipe control pole of (8) and the positive pole of drop-down discharge tube D3 under the emitter connection H bridge of switching tube Q2, the emitter of switching tube Q3 and the grounded emitter of switching tube Q4, the base stage of switching tube Q3 connects one end of current-limiting resistance R7, the other end of current-limiting resistance R7 is that the input L of pipe driver module (4) under H bridge holds, the base stage of switching tube Q4 connects one end of current-limiting resistance R8, the other end of current-limiting resistance R8 is that the input D of pipe driver module (4) under H bridge holds.
3. the drive circuit of switching tube grid voltage that suspends, it is characterized in that: under the H bridge that on the H bridge that it to comprise on H bridge pipe driver module (4) under pipe floating boom driver (3), H bridge, needs drive, pipe (7), needs drive, manage (8), pipe floating boom driver (3) is provided with H bridge input H end, under H bridge, pipe driver module (4) is provided with two-way input, be respectively input L end and input D end, described floating boom driver (3) is made up of suspension switching circuit (1) and OC/OD switch (2);
Wherein, described suspension switching circuit (1), it comprises charging diode D1, bootstrap capacitor C1, suspended voltage transmitting switch pipe Q1, drop-down discharge tube D2 and suspension pull-up resistor R3, suspended voltage transmitting switch pipe Q1 is NPN type triode, drop-down discharge tube D2 is diode, the positive pole of charging diode D1 connects power supply VCC1, negative pole is connected to bootstrap capacitor C1 one end, the collector electrode of suspended voltage transmitting switch pipe Q1 and suspension pull-up resistor R3, the other end of bootstrap capacitor C1 is connected to the output stage of H bridge being managed (7), the base stage of suspended voltage transmitting switch pipe Q1 respectively with the other end of suspension pull-up resistor R3, the negative pole of drop-down discharge tube D2 is connected and OC/OD switch (2) is connected, the emitter of suspended voltage transmitting switch pipe Q1 respectively with the positive pole of drop-down discharge tube D2, the control of H bridge being managed (7) is extremely connected,
Described OC/OD switch (2) has output stage, control pole and input pole, its output stage is connected to the base stage of suspended voltage transmitting switch pipe Q1, and the input H controlling very floating boom driver (3) holds, input stage ground connection;
Pipe driver module (4) under described H bridge, it comprises switching tube Q2, switching tube Q3, switching tube Q4, pull-up resistor R6, current-limiting resistance R7, current-limiting resistance R8, drop-down discharge tube D3, input L end and input D end, switching tube Q2, switching tube Q3 and switching tube Q4 is NPN type triode, drop-down discharge tube D3 is PNP type triode, the collector electrode of switching tube Q2 is connected to one end and the power supply VCC2 of pull-up resistor R6, the base stage of switching tube Q2 respectively connected the other end of pull-up resistor R6, the collector electrode of switching tube Q3, the collector electrode of switching tube Q4 and the base stage of drop-down discharge tube D3, the pipe control pole of (8) and the emitter of drop-down discharge tube D3 under the emitter connection H bridge of switching tube Q2, the emitter of switching tube Q3 and the grounded emitter of switching tube Q4, the base stage of switching tube Q3 connects one end of current-limiting resistance R7, the other end of current-limiting resistance R7 is that the input L of pipe driver module (4) under H bridge holds, the base stage of switching tube Q4 connects one end of current-limiting resistance R8, the other end of current-limiting resistance R8 is that the input D of pipe driver module (4) under H bridge holds, the grounded collector of drop-down discharge tube D3 or manage the output stage of (8) under being connected to H bridge.
4. the drive circuit of switching tube grid voltage that suspends, it is characterized in that: under the H bridge that on the H bridge that it to comprise on H bridge pipe driver module (4) under pipe floating boom driver (3), H bridge, needs drive, pipe (7), needs drive, manage (8), pipe floating boom driver (3) is provided with H bridge input H end, under H bridge, pipe driver module (4) is provided with two-way input, be respectively input L end and input D end, described floating boom driver (3) is made up of suspension switching circuit (1) and OC/OD switch (2);
Wherein, described suspension switching circuit (1), it comprises charging diode D1, bootstrap capacitor C1, suspended voltage transmitting switch pipe Q1, drop-down discharge tube D2 and suspension pull-up resistor R3, suspended voltage transmitting switch pipe Q1 is NPN type triode, drop-down discharge tube D2 is PNP type triode, the positive pole of charging diode D1 connects power supply VCC1, negative pole is connected to bootstrap capacitor C1 one end, the collector electrode of suspended voltage transmitting switch pipe Q1 and suspension pull-up resistor R3, the other end of bootstrap capacitor C1 respectively connected the output stage of pipe (7) on the collector electrode of drop-down discharge tube D2 and H bridge, the base stage of suspended voltage transmitting switch pipe Q1 respectively with the other end of suspension pull-up resistor R3, the base stage of drop-down discharge tube D2 is connected and OC/OD switching circuit (2) is connected, the emitter of suspended voltage transmitting switch pipe Q1 is connected to the emitter of drop-down discharge tube D2, H bridge is managed the control pole of (7), the base stage of drop-down discharge tube D2 is connected to the output stage of OC/OD switches circuit (2), the collector electrode of drop-down discharge tube D2 is also connected to the output stage of H bridge being managed (7),
Described OC/OD switch (2) has output stage, control pole and input pole, its output stage is connected to the base stage of suspended voltage transmitting switch pipe Q1, and the input H controlling very floating boom driver (3) holds, input stage ground connection;
Pipe driver module (4) under described H bridge, it comprises switching tube Q2, switching tube Q3, switching tube Q4, pull-up resistor R6, current-limiting resistance R7, current-limiting resistance R8, drop-down discharge tube D3, input L end and input D end, switching tube Q2, switching tube Q3 and switching tube Q4 is NPN type triode, drop-down discharge tube D3 is PNP type triode, the collector electrode of switching tube Q2 is connected to one end and the power supply VCC2 of pull-up resistor R6, the base stage of switching tube Q2 respectively connected the other end of pull-up resistor R6, the collector electrode of switching tube Q3, the collector electrode of switching tube Q4 and the base stage of drop-down discharge tube D3, the pipe control pole of (8) and the emitter of drop-down discharge tube D3 under the emitter connection H bridge of switching tube Q2, the emitter of switching tube Q3 and the grounded emitter of switching tube Q4, the base stage of switching tube Q3 connects one end of current-limiting resistance R7, the other end of current-limiting resistance R7 is that the input L of pipe driver module (4) under H bridge holds, the base stage of switching tube Q4 connects one end of current-limiting resistance R8, the other end of current-limiting resistance R8 is that the input D of pipe driver module (4) under H bridge holds, the grounded collector of drop-down discharge tube D3 or manage the output stage of (8) under being connected to H bridge.
5. according to the arbitrary described suspension tube grid Voltag driving circuit of claim 1-4, it is characterized in that: under described H bridge being managed (7) and H bridge, pipe (8) adopts field effect transistor or IGBT pipe, wherein, when managing (8) for field effect transistor under H bridge being managed (7), H bridge, it exports very its source S pole, and grid is for controlling pole; When managing (8) for IGBT pipe under H bridge being managed (7), H bridge, it exports very its E pole, and grid is for controlling pole.
6. according to the arbitrary described suspension tube grid Voltag driving circuit of claim 1-4, it is characterized in that: described power supply VCC1 and power supply VCC2 is separate or for same power supply, if the two can be respectively H bridge manages (7) and H bridge under manage (8) normal gate drive voltage be provided.
7. according to the arbitrary described suspension tube grid Voltag driving circuit of claim 1-4, it is characterized in that: described OC/OD switch (2) adopts NPN type triode, NMOS field effect transistor or IGBT pipe, wherein, when OC/OD switch (2) adopts NPN type triode, the output stage of OC/OD switch (2), control pole and input pole be respectively collector electrode C, the base stage B of NPN type triode of employing and emitter E; When OC/OD switch (2) adopts NMOS field effect transistor, the output stage of OC/OD switch (2), control pole and input pole and be respectively the leakage D of adopted NMOS field effect transistor, grid G and source S; When OC/OD switch (2) adopts IGBT during type triode, the output stage of OC/OD switch (2), control pole and input pole be respectively employing IGBT pipe collector electrode C, grid G and emitter E.
8. according to the arbitrary described suspension tube grid Voltag driving circuit of claim 1-4, it is characterized in that: be connected to current-limiting resistance R1 and current resistor R2 after the emitter and collector of described drop-down discharge tube D2, after the emitter and collector of drop-down discharge tube D3, be connected to current-limiting resistance R4 and current resistor R5.
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| CN201510254046.0A CN104883035A (en) | 2015-05-19 | 2015-05-19 | Driving circuit for grid voltage of suspension switch tube |
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| CN201510254046.0A CN104883035A (en) | 2015-05-19 | 2015-05-19 | Driving circuit for grid voltage of suspension switch tube |
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| CN110401334A (en) * | 2019-08-29 | 2019-11-01 | 河北新华北集成电路有限公司 | Timesharing electrical control circuit and high-voltage drive |
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| CN113794358A (en) * | 2021-07-29 | 2021-12-14 | 广东美的白色家电技术创新中心有限公司 | Drive circuit, chip, intelligent power module and household appliance |
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| CN113794358A (en) * | 2021-07-29 | 2021-12-14 | 广东美的白色家电技术创新中心有限公司 | Drive circuit, chip, intelligent power module and household appliance |
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