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.

BQ24650: bq24650不工作

Part Number: BQ24650

调试过程输入电压和可调电源输出24V,电池为14.8V锂电池

空载不接电池输出电压为0.78V

接上电池没有充电电流,此状态下各个电压如下:

VIN_Adatper_OUT=26V

VCC=4.8V

Vmppset=1.343V

Vref=3.25V

Vregn=3.87V

Vbtst=4.46V

Vph=0.78V

Vsrp=0.78v

Vspn=0V

VFB=0.09v

还请大侠帮忙看看,很奇怪vcc电压很低,把电容c4拿掉可以到20几伏,接上电池后,vref也不正常了,2v左右,麻烦帮忙看下