Half-bridge control and drive type gate driver based on bootstrap circuit
A gate driver and bootstrap circuit technology, which is applied in the direction of lamp circuit layout, electric light source, lighting device, etc., can solve the problems of long start-up time, high energy consumption, and large current noise, and achieve convenient production and use, and low energy consumption. The effect of reducing and stabilizing performance
Inactive Publication Date: 2015-10-14
CHENGDU JIESHENG TECH CO LTD
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the defects of high energy consumption, high current noise, and long start-up time in current gate drive circuits, and provide a half-bridge control-driven gate drive based on a bootstrap circuit
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[0017] Such as figure 1 As shown, the present invention is composed of a bootstrap circuit, a driving chip M, a driving circuit connected to the driving chip M, and a half-bridge control driving circuit arranged at the input end of the bootstrap circuit.
[0018] The bootstrap circuit is composed of a field effect transistor MOS, a polar capacitor C1, a polar capacitor C5, a polar capacitor C6, a resistor R1, a resistor R2, a resistor R4 and a resistor R5. When connecting, one end of the resistor R5 is connected to the source of the field effect transistor MOS, and the other end is grounded; the positive pole of the polarity capacitor C6 is connected to the source of the field effect transistor MOS, and its negative pole is connected to the INP pin of the driver chip M The negative electrode of the polar capacitor C1 is connected to the gate of the field effect transistor MOS, and its positive electrode is connected to the drain of the field effect transistor MOS after passing...
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The invention discloses a gate driver based on a bootstrap circuit. The gate driver is mainly composed of a drive chip M and a drive circuit connected with the drive chip M. The gate driver is characterized by being further provided with the bootstrap circuit; the bootstrap circuit is composed of a field-effect transistor MOS, a resistor R5, a polar capacitor C6, a polar capacitor C1 and the like, wherein one end of the resistor R5 is connected with the source electrode of the field-effect transistor MOS, the other end of the resistor R5 is grounded, the positive electrode of the polar capacitor C6 is connected with the source electrode of the field-effect transistor MOS, the negative electrode of the polar capacitor C6 is connected with an INP pin of the drive chip M, the negative electrode of the polar capacitor C1 is connected with the gate of the field-effect transistor MOS, and the positive electrode of the polar capacitor C1 is connected with the drain electrode of the field-effect transistor MOS. The gate driver is simple in overall structure and very convenient to manufacture and use; meanwhile, the start time of the gate driver is only 1 / 4 that of a traditional gate drive circuit, and the start time of the gate driver is extremely short.
Description
technical field [0001] The invention relates to an LED driving circuit, in particular to a half-bridge control-driven gate driver based on a bootstrap circuit. Background technique [0002] At present, due to the characteristics of low energy consumption, long service life, safety and environmental protection, LED lamps have become one of the mainstream products for people's living lighting. Since the LED lamp is different from the traditional incandescent lamp, it needs to be driven by a dedicated driving circuit. However, due to the unreasonable design structure of the currently widely used gate drive circuit, the current gate drive circuit has defects such as high energy consumption, large current noise, and long start-up time. Contents of the invention [0003] The purpose of the present invention is to overcome the defects of high energy consumption, high current noise and long start-up time in current gate drive circuits, and provide a half-bridge control-driven gat...
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IPC IPC(8): H05B37/02
Inventor 雷明方
Owner CHENGDU JIESHENG TECH CO LTD