BQ24090: Help check BQ24090 schematic

Star Xu

Genius 9645 points

Part Number: BQ24090

Please help check the attached schematic.

Star

Thanks

over 4 years ago

0 Manuel Diaz Corrada over 4 years ago

TI__Prodigy 460 points

Hey Star,

Thank you for taking the time to post this schematic.

Pin 1:IN Looks good you need cap, 10uF OK

Pin 2: ISET looks good 1k will set to 540mA charge current

Pin 3: VSS ground tied to ground good

Pin 4: PRETERM Looks good have a resister 1k/2k this is 5% to 10% termination, both will work.

Pin 5: /PG Pull up to interface with MCU, looks OK

Pin 6: NC not connected

Pin 7: ISET2 pull low to set unit to used ISET resister

Pin 8: /CHG, Open collector output resister OK

Pin 9: TS 10k Resister will keep unit in safe range.

Pin 10: OUT has an 1uF output cap within the specified ratings

Overall this is a correct schematic

0 Star Xu over 4 years ago in reply to Manuel Diaz Corrada

TI__Genius 9645 points

Hi Manuel Diaz Corrada

Thanks for your reply. The query is the battery detection state abnormal when the battery voltage exceeds 4.0v (full voltage 4.18v)?

Thanks

Star

0 Manuel Diaz Corrada over 4 years ago in reply to Star Xu

TI__Prodigy 460 points

You can use the CHG pin to detect when the charging is complete. I might not be understanding your question, what do mean abnormal state when Vbat > 4V?

0 Manuel Diaz Corrada over 4 years ago in reply to Manuel Diaz Corrada

TI__Prodigy 460 points

Hey Star, did that answer your question or do you need more clarification?

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BQ24090: Help check BQ24090 schematic