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Original question:

BQ25713: Asking for the BQ25713 design suggestion

BQ25713: Asking for the BQ25713 charge design suggestion

SHH
Mastermind 32346 points
Part Number: BQ25713


Hi Sir,

 

My customer has BQ25713 question.

Can the 3S battery (12.6V) be fully charged if the DC input is 12V? thanks for help!

 

previously post

 e2e.ti.com/.../bq25713-asking-for-the-bq25713-design-suggestion

 

BR,

SHH

  • +1
    TI__Guru**** 170526 points

    Hi SHH,

    Yes, as long as the input power is high enough to provide both the system load current and some charge current.

    Regards,

    Jeff

  • 0 in reply to Jeff F
    TI__Mastermind 32346 points

    Hi Jeff,

    Thanks for feedback.

    Customer read the battery gauge and found the battery is not fully charged.

    after several times un-plug and plug DC power, sometimes the charging current will become zero and the battery is not fully charged.

    Would you please reveiw the BQ25713 dump register for normal and abnormal case  and provide your comment?

    1. change.txt is the normal charging dumped registers.

    Fullscreen change.txt Download 
    eSignage_mono:/sys/kernel/debug/regmap/1-006b # cat registers
00: 0e
01: 07
02: c0
03: 07
04: 38
05: 31
06: 18
07: 01
08: 00
09: 00
0a: c0
0b: 3a
0c: 00
0d: 28
0e: 00
0f: 28
10: ff
11: ff
12: ff
13: ff
14: ff
15: ff
16: ff
17: ff
18: ff
19: ff
1a: ff
1b: ff
1c: ff
1d: ff
1e: ff
1f: ff
20: 00
21: 84
22: 80
23: a8
24: 00
25: 28
26: 00
27: ff
28: 00
29: 00
2a: 00
2b: 00
2c: 00
2d: 00
2e: 40
2f: 88
30: 11
31: 02
32: b7
33: 02
34: 00
35: 00
36: 54
37: 4a
38: 20
39: 81
3a: 00
3b: 20
eSignage_mono:/sys/kernel/debug/regmap/1-006b #

    2. plug in AC not change.txt is abnormal no charging dumped registers.

    Fullscreen plug in AC not change.txt Download 
    eSignage_mono:/sys/kernel/debug/regmap/1-006b # cat registers
00: 0e
01: 07
02: 00
03: 00
04: 38
05: 31
06: 18
07: 01
08: 00
09: 00
0a: c0
0b: 3a
0c: 00
0d: 28
0e: 00
0f: 41
10: ff
11: ff
12: ff
13: ff
14: ff
15: ff
16: ff
17: ff
18: ff
19: ff
1a: ff
1b: ff
1c: ff
1d: ff
1e: ff
1f: ff
20: 00
21: 80
22: 80
23: a8
24: 00
25: 41
26: 00
27: ff
28: 00
29: 00
2a: 00
2b: 00
2c: 00
2d: 00
2e: 40
2f: 88
30: 11
31: 02
32: b7
33: 02
34: 00
35: 00
36: 54
37: 4a
38: 20
39: 81
3a: 00
3b: 20

    BR,

    SHH

  • +1 in reply to SHH
    TI__Genius 11385 points

    Hi SHH,

    Looking at the register dump, I noticed that ChargeCurrent register (03/02h) is set to 0x00, which is 0 A. There will not be any charging if the setting is set to 0A.



    ChargeCurrent register will need to be updated at adaptor plug in every time.

    I would recommend getting an EVM in case of any future issues.

    Thanks and I hope this helps,

    Peng

    *Please press "This Resolved My Issue" on the thread if my answer is satisfactory