BQ25756EVM: How to run BQ25756EVM at 240W in reverse mode

nobuyuki.hanaoka

Part Number: BQ25756EVM
Other Parts Discussed in Thread: PMP41062

Hello

I will evaluate BQ25756EVM by operating it in reverse mode.

So, please tell me how to run BQ25756EVM under the following condition to be accurate enough to meet the USB-EPR standards.

①Input 12V/20A →Output 48V/5A

②Input 48V/5A→Output 12V/20A

Perhaps, I need to change the sense resistor for the reverse current limit.

7 months ago

0 Jing Zou 7 months ago

TI__Mastermind 20200 points

Hi Nobuyuki-san,

Thanks for reaching out. A team member will get back to you on this tomorrow. Thanks.

0 Ethan Galloway 7 months ago

TI__Genius 17020 points

Hello Nobuyuki,

You'll need to change the IAC sense resistor to a 5mOhm sense resistor. The default IAC sense resistor is a 2mOhm resistor.

For reference, you can check out the 100W PMP41062 reference design: https://www.ti.com/tool/PMP41062

Let me know if you have any other questions.

Best Regards,
Ethan Galloway

Power management

Power management forum

BQ25756EVM: How to run BQ25756EVM at 240W in reverse mode