BQ25750的FSW_SYNC引脚外接100k电阻至GND,根据数据手册开关频率值应为300kHz。现情况是BUCK充电状态下,开关频率测得只有160kHz左右。想请问是什么原因导致开关频率不正常呢
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BQ25750的FSW_SYNC引脚外接100k电阻至GND,根据数据手册开关频率值应为300kHz。现情况是BUCK充电状态下,开关频率测得只有160kHz左右。想请问是什么原因导致开关频率不正常呢