BQ25703A: remove input sense resistor

Jeff Yang76

Part Number: BQ25703A
Other Parts Discussed in Thread: BQ25703,

Hi,

Please refer to below schematic.

Because some reason, we want bypass BQ25703 let "V_PM855B_USB_IN" power bypass to "V_SYS",
We remove the PAR37 input current sense resistor, and add one wire from "V_PM855B_USB_IN" to "V_SYS",
May I know it may caused BQ25703 any side effect? or it possible to damage BQ25703A?

Note. Input voltage is 12V.

Thanks!

Jeff

over 4 years ago

0 Kedar Manishankar over 4 years ago

TI__Mastermind 24075 points

Hi Jeff,

Input current sense resistor differential voltage is sensed by ACP and ACN pin to regulate input current. You want to bypass straight from the input to system?

0 Jeff Yang76 over 4 years ago in reply to Kedar Manishankar

Intellectual 490 points

Hi,

Yes, Due to some reason we want to bypass straight from the input to system, just want rework less component meet to requirement, and don't damage BQ25703A.

Thanks!

Jeff

0 Tiger Zhou over 4 years ago in reply to Jeff Yang76

TI__Mastermind 23655 points

It is possible to damage the part in such a fashion. Alternatively, you can run the part in Pass-Through Mode.

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BQ25703A: remove input sense resistor