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LM3414HV: 頻率問題請教

Part Number: LM3414HV
Other Parts Discussed in Thread: LM3414

問題一  規格書上建議PWM頻率為200K~1000K之間

              如給PWM頻率低於200K,會發生什麼狀況?

問題二 LM3414有DUTY CYCLE RANGE嗎?

  • Hi

         经验上是这个范围频率和电阻是线性的对应关系,如果偏离,就会不线性了,不被建议。

         datasheet没有提及最大duty, 只提高最小on duty time, 从datasheet看80% duty是没有问题的。