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BQ25798: BQ25798 fast charge timmer issue

q h
Prodigy 150 points
Part Number: BQ25798

HI Ti team

              Will the BQ25798 automatically stop charging after the BQ25798 is triggered to the fast charging timer? Or the MCU that controls the BQ25798 needs to send instructions to stop charging

  • 0
    TI__Genius 12415 points

    Hello,

    The BQ25798 should not need a MCU for charge termination.

    Best Regards,

    Christian.

  • 0 in reply to Christian Moyer
    Prodigy 150 points

    BQ25798-REGISTER.txt 
    * Created: Fri Apr 05 10:28:21 CST 2024
*
* Format: Register Name  tab Character,\t  Register Address  tab Character,\t  Hexadecimal register value.
* BQZ Container: Charger_2_00-bq25798.bqz
*
REG00	00	0E
REG01	01	41A
REG03	03	12C
REG05	05	88
REG06	06	12C
REG08	08	43
REG09	09	01
REG0A	0A	A8
REG0B	0B	DC
REG0D	0D	03
REG0E	0E	38
REG0F	0F	E2
REG10	10	50
REG11	11	78
REG12	12	08
REG13	13	21
REG14	14	86
REG15	15	AA
REG16	16	C0
REG17	17	02
REG18	18	3B
REG19	19	32
REG1B	1B	00
REG1C	1C	00
REG1D	1D	01
REG1E	1E	00
REG1F	1F	00
REG20	20	00
REG21	21	00
REG22	22	00
REG23	23	00
REG24	24	00
REG25	25	00
REG26	26	00
REG27	27	00
REG28	28	FF
REG29	29	47
REG2A	2A	7F
REG2B	2B	1F
REG2C	2C	00
REG2D	2D	00
REG2E	2E	A0
REG2F	2F	00
REG30	30	00
REG31	31	00
REG33	33	00
REG35	35	00
REG37	37	00
REG37	39	00
REG3B	3B	2454
REG3D	3D	247C
REG3F	3F	24C
REG41	41	38
REG43	43	CE3
REG45	45	CEA
REG47	47	00
REG48	48	19
    BQ25798-LOG.log

    HI TI team

         Attached is the register configuration file of my BQ25798 and the data of BQ25798 LOG. After charging for more than 15h, the charging does not stop, and the fast charge timmer does not work. Please help check why the fast charge timmer does not work

  • 0 in reply to q h
    TI__Genius 12415 points

    Hello,

    Can you run a test by increasing termination current to 320mA, to see if this resolves the issue?

    I think the low termination current might be the issue:

    Best Regards,

    Christian.