Part Number: LMR38020 I built a flybuck auxiliary power supply using LMR38020FDDAR, which outputs two 12V. The designed non isolated 12V_ANA output power is 12W, and the isolated 12V_H output power is 3W. The voltage of the non isolated 12_ANA does not…
Part Number: UCC28740
麻烦请问 什么情况下 ucc28740在启动时 Drv引脚只打出一个PWM波?目前启动时 芯片只打一个PWM波后便停发波了。
PSR and SSR Flyback Aux Winding OVP and UVLO Fault Sensing Design tips and Troubleshooting 的参考设计中 好像指出ucc28740 启动时 最少打3个PWM波进行故障检测