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BQ24157: Register setting check for BQ24157

Cris Qi
Intellectual 835 points
Part Number: BQ24157

Dear Pros，

We use BQ24157 to set the charge at 1.15a, and the maximum current on the line is only 1.08a。

The charge of the other chip hl7005 is also 1.15a, and the maximum current on the line can reach 1.17a；

Is there a register setting problem？Pls double check。many thanks；

 

08-14 08:16:03.467222   251   251 D [   40.179681].(1)[251:charger_thread]: [0x0]=0xd0

08-14 08:16:03.468599     0     0 D [   40.181058][0x1]: =0xf8

08-14 08:16:03.457762   251   251 I [1565770563.457762].(1)[251:charger_thread]: [0x2]=0xb6

08-14 08:16:03.472996     0     0 D [   40.185455][0x3]=0x51 .(1)[251: charger_thread][0x4]=0x6a

08-14 08:16:03.473606     0     0 D [   40.186065][0x5]=0x3 .(1)[251: charger_thread]

  • 0
    TI__Guru**** 164246 points

    Hi Cris,

    What is the setting in register 0x6?  The safety limit register sets a clamp for battery regulation voltage and charge current.  This register must set at first power up or whenever the voltage CSOUT drops below 2.0V.

    Regards,

    Jeff

  • 0 in reply to Jeff F
    Intellectual 835 points

    Hi Jeff，

    [0x6]=0x7c

    Is there a register setting problem？

  • 0 in reply to Cris Qi
    TI__Guru**** 164246 points

    Hi Cris,

    If [0x6]=0x7c at first power up and maintains that setting then the register is not the issue.  With no input current limit, the only other common issues for lower than expected charge current are:

    1. CSOUT is sensing close to BATREG which forces the charger into CV mode too early 0 what is the voltage between CSOUT and IC ground pins?

    2. VBUS is too close to VBAT causing the IC to run in VINDPM or max duty cycle.  What is the voltage at VBUS and CSOUT pins?

    Regards,

    Jeff

  • 0 in reply to Jeff F
    TI__Genius 10385 points

    Hello,

     

    I have not heard back from you in a while. Please let us know if you have any further questions, otherwise I will be closing this thread.

     

    Thanks,

    Ricardo