This loop uses an optocoupler (e.g., PC817) and an adjustable precision shunt regulator (such as the TL431 ). If the output voltage drifts, the TL431 changes the brightness of the internal LED inside the optocoupler. This signals the primary-side PWM IC to adjust its duty cycle, stabilizing the outputs. LED Backlight Driver Circuit
| 功能模块 | 常见芯片型号 | |---------|------------| | 待机PWM控制器 | ICE3BR1765J（Infineon）、MP150GJ、FSDM311 | | PFC控制器 | NCP1608、FAN7529、L6562 | | LLC主转换器 | NCP1392、ICE2HS01 | | LED背光驱动器 | OB3363QP、MP3394 | | 同步整流驱动器 | TEA1792 | 17ips72 schematic work
The journey of electrical power on the 17IPS72 board begins at the AC mains input terminal. This stage is responsible for safety, filtration, and converting alternating current (AC) into direct current (DC). This loop uses an optocoupler (e