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BQ76952: BQ76952

Swati Deshapande
Prodigy 40 points
Part Number: BQ76952
Other Parts Discussed in Thread: BQ76942

Tool/software:

Hi Team,

I am using two AFEs for my application and need to do the OTP for one of them . both of these are differentiated by an Isolator.

as per the reference of  TIDMB58  as below  

Need to know how to Enable REG1 & REG2 voltages without OTP programming, as of now we are Enabling REG1 & REG2 voltages through OTP programming. 

Thanks and Regards,

Swati Deshapande

  • 0
    TI__Genius 17795 points

    Hello Swati,

    Depending on the device version you have, as shown in Section 5 Device Comparison Table, of the BQ76952 Datasheet, REG1 can be defaulted to certain set voltages without the need to enable or modify the OTP programming/memory at startup.  However, if you would like to use different default values on power-up, you would need to use OTP programming. 

    Best Regards,

    Alexis

  • 0 in reply to Alexis_H
    Prodigy 40 points

    Hi Alexis

    We are using Bq76952  it's default value is Disabled.

    So would like to understand that before doing OTP how can we get the REG1 & REG2 values.

    Also in TIDMB58 Reference schematic they are using Bq76942  and that is also having the same default values for REG1 which is disabled.

    So we would like to know how to get REG values before doing OTP or is it mandatory to do OTP to get REG values

    By default we are seeing 0V at both the REG voltages before doing OTP. So as per your above comment how to set REG voltages without the need to enable the OTP.


    Reference of  Bq76942 

  • 0 in reply to Swati Deshapande
    TI__Genius 17795 points

    Hello Swati,

    As you mentioned before, for the BQ76952 device the REG1 and REG2 are disabled by default. Unless you use a different version, such as BQ7695202, you will have to program the desired configuration into OTP memory to have it autonomously load the OTP settings/enable the LDO as configured without requiring communications first.

    Best Regards,

    Alexis