Intelligent LED Driver Circuit Based on Bipolar Technology for Optical Isolated IGBT Gate Driver
In this study,an intelligent high-speed LED driver circuit is designed using bipolar technology,which can be used as the input driver of an optical isolated IGBT gate driver chip.This design uses a new logic gate structure to realize the functions of signal transmission,fault feedback,and external setting and to reduce the delay time of signal transmission.The test results show that under normal temperature conditions,the input signal transmission delay time of the LED driver circuit is 69.99 ns,and the delay time from the effective reset signal to fault elimination is 4.59 μs.The designed driver circuit can meet the requirements of the optocoupler isolated IGBT grid driver chip.
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