This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LM2776: 电压逆变Voltage inverting principle

Part Number: LM2776

LM2776可用于voltage inverting,数据手册里提供的工作原理图如下。

请问下半部分VIN和VOUT之间接分压电阻后输入PFM COMP的作用是什么?是控制PFM mode还是Undervoltage lockout?我理解的PFM mode是当输出电流比较小时(<40mA)降低OSC的频率,但是改图示为电压分压后反馈,却输入了OFM比较器,不太理解是什么意思,期待TI工程师与大佬回复,谢谢!