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请各位大神帮忙确认芯片周围参数，PWM输出的必要条件是什么？
亲；是否方便上传下你的电源PP？
Hi
EN脚电压建议大于2.5V(改EN分压电阻）
再确认BP5有5V输出，RFE有0.7V,
做启动，至少有瞬间PWM, 如果要持续，需要完整的电路，并且没有触发保护。
