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WEBENCH® Tools/BQ24650: BQ24650 going into a fault mode when trying to charge battery less then 10v

Arnab Makur
Prodigy 10 points
Part Number: BQ24650

Tool/software: WEBENCH® Design Tools

Hi,

when trying to charge a lead acid battery which has less then 10v, by a solar panel of 20W, the charge controller is going into the fault mode. 

it is not charging the battery.

  • 0
    TI__Mastermind 24075 points

    Hi Arnab,

         Have you checked if the precharge timer has been hit? If after 30 minutes the battery voltage has not reached VLOWV (1.55V on VFB pin), then BQ24650 turns off and indicates a fault. Verify if BQ24650 can charge at your set precharge current for 30 minutes and then shuts off.