BQ25703A: BQ25703A Battery charging problem

Ho-jeong Jeon

Part Number: BQ25703A

Hi TI,

Good day.

We are using BQ25703A IC, but getting a charging problems. When DC power is applied for the first time, charging works well. However there is a problem in that it does not charge when re-inserted after disconnecting the DC power. It is always charged only when it is booted after the first DC power is turned on, and is not charged when the DC power is turned on again after the booting is completed.

Any help would be appreciable please provide the appropriate solution

Best regards

Richard

over 2 years ago

0 Ho-jeong Jeon over 2 years ago

Prodigy 10 points

DC = 12V
Battery 2cell 8.4V

0 Khalid Bairuti over 2 years ago in reply to Ho-jeong Jeon

TI__Expert 4780 points

Hello Richard,

Can you provide a register dump when the device is charging as well as when it does not charge upon re-insertion of the Adapter?

Thanks,

Khalid

0 Ho-jeong Jeon over 2 years ago in reply to Khalid Bairuti

Prodigy 10 points

Hi~!, Khalid

At first, cold boot's register

0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 0e 02 c0 05 00 22 00 02 00 0a 40 1d 00 16 00 41 ????.".?.?@?.?.A
10: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
20: 00 a4 00 00 00 41 00 80 00 16 00 1c 4b 4d 40 78 .?...A.?.?.?KM@x
30: 10 02 b7 02 00 00 54 4a 20 81 ff a0 ff 01 ff ff ????..TJ ?.?.?..
40: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
50: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
60: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................

second, DC-jack re-insert.

0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 0e 02 00 00 00 22 00 02 00 0a 40 1d 00 16 00 0a ??...".?.?@?.?.?
10: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
20: 00 a8 00 00 00 0a 00 88 00 00 00 06 46 49 40 78 .?...?.?...?FI@x
30: 10 02 b7 02 00 00 54 4a 20 81 ff a0 ff 01 ff ff ????..TJ ?.?.?..
40: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
50: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
60: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
70: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
90: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
a0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
b0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
c0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................
f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................

Thanks!