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调试BQ27425出现的相关问题

Other Parts Discussed in Thread: BQ24725

  本人原理图是按照bq24725中输出4.2V的典型电路画的,物料也是按照推荐物料购买,往寄存器中写的数如下:

ChargeOption(0x12H)--->0xF902    读出的数也为  0XF902 

ChargeCurrent(0x14H)--->0x1000    读出的数也为  0X1000  充电电流无法设置为0x0800,设置完在读是数据为0x00;

ChargeVoltage(0x15H)--->0x1000    读出的数也为  0X1000

InputCUrrent(0x3F)--->0x1000   读出的数也为  0X1000

直接读取

0XFE  ManufacturertID()  ------> 0x0040  正确

0XFF DevicelID()   ------->  0x0008   不正确,本应该为0x000B

一共三个问题,求解惑,谢谢!

1.输出端未接上电池,没有电压输出?

2.充电电流设置也不能设置为2A,但是能设置为4A?

3.设备ID号不准确?

PCB_Project2.pdf