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BQ24610: hypothetical ISET1 Low-side resistor failure (open) - consequence?

Mark Pearson
Genius 12705 points
Part Number: BQ24610

Question from my customer:

If the ISET1 Low-side resistor fails (open) - what would be the consequence?

The (valid) input voltage range for ISET is 2V, and it can safely accept a VREF voltage (3.3V)... But what will the bq24610 do when ISET is pulled up to VREF (the low-side resistor, R12 - in the EVM schematic, fig. 10, OPENS up)?

Thanks!

  • 0
    TI__Mastermind 24075 points

    Hello Mark,
    If low-side resistor R12 is open, ISET1 can be safely pulled up to VREF (3.3V) as it is with in the abs. max and recommended operating conditions. This will result in 10A maximum fast charging current limit. Note: You will not get a higher fast charge current limit by increasing Viset1 over 2V.