BQ24133: Does the system power could be powered by BQ24133 internal MOSFET body diode

user397859

Part Number: BQ24133

as mentioned, I design a 2 cell Li-ion battary charger, I have removed the P-MOSFET for battary, but the system still could powered by battary,

Then the question is : Does the system power could be powered by BQ24133 internal MOSFET body diode ?

over 6 years ago

0 Paul Yeh over 6 years ago

TI__Genius 16185 points

Yes, the system power path is from BQ24133 internal H/S MOSFET body diode. See below photo for detail.

Battery power from SW pins then output to system from PVCC pins.

Please don't use BQ24133 body diode to provide system power source. it is not for power path purpose and will cause thermal problem.

Thanks

0 user397859 over 6 years ago in reply to Paul Yeh

Prodigy 140 points

Thanks for your kindly reply, and I will add Q3 for my application. Additionaly, how about the body diode current spec of BQ24133, is there any info about this?

Thanks!

0 Paul Yeh over 6 years ago in reply to user397859

TI__Genius 16185 points

Sorry, we don't have this data in datasheet.

Thanks

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BQ24133: Does the system power could be powered by BQ24133 internal MOSFET body diode