Hi ,I'm reaching a problem about bq25703a's BATFET.
I have tested my code on EVM before,it works well.
My option step:
1. write 0x020E to [0x01/00] //exit lowpwr
2. write 0x40D0 to [0x05/04] //charge volt 12.6V
3. write 0x0300 to [0x03/02] //charge curr 768mA
4. write 0x2B00 to [0x0D/0C] //min sys volt 11V
5. write 0xE0FF to [0x3B/3A] //adc option
But when I use it on my own board, the BATFET fully off, with the PMOS-Gate voltage 11V
That makes my board can't charge the battery, with current always 0A.
I have read the datasheet and it says when the CELL_BATPRISZ pin pulled low to indicate battery removal and will disable charge.
CELL_BATPRISZ pin is only pulled to ground on my board so I can't take more options.
But I have run my code successfully on my own board before, does this Pin really affect charger or must be pulled up?
After these two options I finded my board doesn't work:
1. I have let the positive and negative pole of the battery connected reversely;
2. I have reset the IC reg by writing 0x35[6] to 1.
That's all.
So how can I find the reason why the charger doesn't work? (current = 0)
Thanks.
