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求助,BQ24195 SYS管脚输出电流问题

Other Parts Discussed in Thread: BQ24195

BQ24195设置如下:

1、VBUS输入电源在5V/2A以上(接适配器),未接电池;

2.、为了对应适配器,把D+、D-短接,REG00 35;

3、 REG05 8A

4、使能充电(CE PIN = LOW, REG01[5:4]=01)

此时读寄存器,

REG08 为 B4,REG09 为00,REG10为23

问题:为何BQ24195的15、16脚SYS,用电子负载测试,Isys输出电流最多只能到200mA,当加到300mA时,Vsys电压降到只有1V了?

手册上写的是,Isys最大可以达到4.5A

谢谢回复!比较着急