HT4902T HT4902T IC+MCU+ IC LED 4 500mA MOSFET 0V / / 4KV ESD MOSFET 500KHZ 5uA LED USB_IN 20uA BTP<3.2V L1 BTP<3V 1 HT4902T : 1 LED 2 EXT_CH 3 L1 4 L2 5 L3 6 L4 7 KEY 8 CE 9 GND 10 STB 1...