• State TI Thinks Resolved
  • Locked Locked
  • Replies 4 replies
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 247 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

BQ25622EVM: Set parameters of ICHG

Paul Chang
Prodigy 40 points
Part Number: BQ25622EVM
Other Parts Discussed in Thread: EV2400, BQ25622

Tool/software:

Dear TI,

Why can’t I set ICHG to 400 mA? It always reads 160 mA.

This is my setting as below.↓

  • 0
    TI__Mastermind 31410 points

    Hi Paul, 

    Thank you for reaching out via E2E. Please see my comments below. 

    1)I recommend first disabling the watchdog timer (REG0x16[1:0] = 00) to avoid registers getting reset due to watchdog expiration. ICHG value is divided in half, as mentioned in datasheet section 8.4.1, when watchdog expires. 

    2)When setting ICHG value in the GUI you should be able to select 400mA from the dropdown menu. The value corresponds to hexadecimal value 140 for 16 bit REG0x02. If for some reason you have trouble with the dropdown menu you can also type the hex value 140 in the D column for REG02 on the right side of the GUI where binary values are shown.

    Let me know if you are still having issues setting ICHG = 400mA. 

    Best Regards,

    Garrett

  • 0 in reply to Garrett Kreger
    Prodigy 40 points

    But ICHG default Value is 1040mA not 160mA.

    (From Table 9-9)

  • 0 in reply to Paul Chang
    TI__Mastermind 31410 points

    Hi Paul, 

    I am not sure why you see 160mA, but I have verified on the BQ25622EVM that power up value for ICHG is 1040mA and we have not had any complaints from other customers of device only being set to 160mA ICHG. 

    If you change the value to 400mA in the drop down menu then click 'read register' button does the value changes back to 160mA? Do you have any part besides BQ25622 and EV2400 adapter connected to the I2C lines? 

    Best Regards,

    Garrett

  • 0 in reply to Garrett Kreger
    TI__Mastermind 31410 points

    Hi Paul, 

    One additional point I just noticed. In your provided image it shows REG02 is set to 101 binary with bit 5 as the least significant bit (LSB). To set ICHG = 400mA REG02 should be set to 101 binary with bit 6 as the LSB. 

    I am wondering if the issue stems from you using bit 5 as the LSB when ICHG setting LSB is in fact bit 6 as mentioned in table 8-9 of the BQ25622 datasheet. Please also ensure you are referring to the most up to date version of the datasheet. 

    Best Regards,

    Garrett