BQ24610: power path control

Jason Hu27

Part Number: BQ24610

Dear experts, please refer to below figure. Because my system only can be supplied from battery(The voltage can not be exceeded 13V), so I modified the schematic. The Q3 MOS does not be connected to extrenal DC Adapter. Does this design be OK?

over 6 years ago

0 Jing Zou over 6 years ago

TI__Mastermind 20240 points

We recommend to connect the drain of Q3 between L1 and RSR such that the sense resistor can sense the charge current.

With the connection in your schematic, the sense resistor senses the sum of the load current and the charge current. The charger will not have control over the charge current. Your termination will be affected.

0 Jason Hu27 over 6 years ago in reply to Jing Zou

Intellectual 910 points

Dear Jing, when DC adapter insert, the Q3 MOS will turn off. So, the sense resistor will not sense the sum of the load current and the charge current. Is this right?

0 Jing Zou over 6 years ago in reply to Jason Hu27

TI__Mastermind 20240 points

Yes. In the case where input is absent, there is no converter output current for the device to sense.

0 Jason Hu27 over 6 years ago in reply to Jing Zou

Intellectual 910 points

Dear Jing, Thanks for your help.

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BQ24610: power path control