Boosting dual-filter type gate driving system for blue light-emitting diode (LED) lamp

Abstract

The invention discloses a novel gate drive system for blue LED lamps. The novel gate drive system mainly comprises a transformer T, a driver chip M, a switching current source, a diode D1, a capacitor C3, a resistor R7 and a transistor Q4, wherein the switching current source is serially connected between a VCC pin and an INP pin of the driver chip M, the diode D1 is serially connected between the VCC pin and a BOOST pin of the driver chip M, the capacitor C3 is serially connected between the BOOST pin and a TG pin of the driver chip M, the resistor R7 is serially connected between the TG pin and a TS pin of the driver chip M, a base electrode of the transistor Q4 is connected with the TG pin of the driver chip M, a collecting electrode of the transistor Q4 is grounded after passing by a capacitor C4 and a capacitor C5 sequentially, and an emitting electrode of the transistor Q4 is grounded. The novel gate drive system for the blue LED lamps has the functions of short-circuit protection, overvoltage protection and open-circuit protection and is low in power consumption, and starting time of the novel gate drive system is one fourth of that of a traditional gate drive circuit.

Description

technical field [0001] The invention relates to an LED driving circuit, in particular to a grid driving system for boosting double-filtering blue LED lamps. 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, large current noise and long start-up time in the current gate drive circuit, and provide a reasonable structure design, ...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of high energy consumption, large current noise and long start-up time in the current gate drive circuit, and provide a reasonable structure design, which can effectively reduce power consumption and current noise, and significantly shorten the start-up time The boost double-filter blue LED lamp grid drive system

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