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BQ25616充电电流设置问题

你好!现在我司做的穿戴产品使用这个BQ25616芯片,现在发现OTG脚拉低后(才能启动电源充电SATA&PG灯常亮),但是充电电流很小,请帮忙看下图纸哪里有异常?

如Word附件原理图

BQ25616.docx

Star Xu:

您好,电路上看您的D+,D-没有接。
if D+/D- is left floating, input current limit is determinedby the resistor value at ILIM pin and charge current is set by the resistor value at ICHG pin. The actual charge current is determined by both ILIM and ICHG depending which one allows lower charge current. The charge current cannot reach the set value. As I mentioned earlier, this could be caused by the battery impedance. Please measure the voltage at BAT pin, if BAT pin voltage has reached the charge voltage, then the charge current is determined by battery terminal voltage and impedance (CV mode).

user6424410:

回复 Star Xu:

您好!是的,BQ25616没接D+,D-(这两个保持悬空,插座的USB数据脚,这两个我们接到ARM那边使用了。),按规格书描述那段话,那就输入电流有ILIM控制,输出电流由ICHG控制了,硬件如何匹配成:输入电流2A,输出充电也为2A?

user6424410:

回复 user6424410:

硬件参数上如何匹配成:输入电流2A,输出充电也为2A?这边不太明白,还请帮忙支持!感谢!

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