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BQ24650: 无法充电

Part Number: BQ24650


调试过程输入电压和可调电源输出21V,电流4A,电池为12V铅酸电池

空载不接电池输出电压为13.8V

接上电池没有充电电流,此状态下各个电压如下:

VIN=21.027V

VCC=20.809V

Vmppset=1.4105V

Vref=3.299V

Vregn=5.964V

Vbtst=12.519V

Vph=12.519V

Vsrp=12.516V

Vspn=12.516V

VFB=1.9007v

还请大侠帮忙看看