DRV2625: BAT_LIFE_EXT calculation

Ben Genereaux

Part Number: DRV2625

Hi team,

What is the calculation between voltage and the register value for BAT_LIFE_EXT (0x0A and 0x0B). I am not finding anything in the datasheet or excel calculator.

Thanks,

Ben

over 1 year ago

0 Jeff McPherson over 1 year ago

TI__Mastermind 35730 points

Hi Ben,

I believe that BAT_LIFE_EXT uses the same formula that OD_CLAMP does, but let me confirm that with systems.

Thanks,
Jeff McPherson

0 Ben Genereaux over 1 year ago in reply to Jeff McPherson

TI__Intellectual 1040 points

Thanks Jeff, please let me know once you confirm.

Ben

0 Jeff McPherson over 1 year ago in reply to Ben Genereaux

TI__Mastermind 35730 points

Hi Ben,

I'm still waiting to get confirmation, but I have one of our systems engineers looking into it.

Thanks for your patience,
Jeff McPherson

+1 Jeff McPherson over 1 year ago in reply to Jeff McPherson

TI__Mastermind 35730 points

Hi Ben,

We found that the register value uses the formula BAT_LIFE_EXT_LVLx[7:0] = (Voltage level / 5.6V) * 255; rounded to the nearest hex value. It's essentially the fraction of fullscale (5.6 instead of 5.5 to fill the register) converted into an 8 bit register.

Best regards,
Jeff McPherson

Motor drivers

Motor drivers forum

DRV2625: BAT_LIFE_EXT calculation