RE: LM5170EVM-BIDIR: Low output voltage

Surabadin Daengdon

Thank you for your answer.

Today, I tested using an input voltage of 12V/10A and HV side connecting with R = 200 Kilo-ohms. However, the output voltage on the HV side was only around 24-25V. Is there anything problem? Thank you.
Best Regards

1 month ago

0 Feng Ji 1 month ago

TI__Genius 14075 points

Hi Surabadin,

Please check the jumper settings following https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1342854/lm5170-q1-question-about-lm5170-q1-evm/5115675?tisearch=e2e-sitesearch&keymatch=lm5170%252520jumper#5115675

The only difference is buck mode and boost mode.

Best Regards,

Feng

0 Surabadin Daengdon 1 month ago in reply to Feng Ji

Prodigy 30 points

Yes my jumper was corrected. thank you

+1 Feng Ji 1 month ago in reply to Surabadin Daengdon

TI__Genius 14075 points

Hi Surabadin,

Please share some waveforms like input voltage, output voltage, inductor current to know the status.

Best Regards,

Feng

+1 Surabadin Daengdon 1 month ago in reply to Feng Ji

Prodigy 30 points

Today, I tested using an external power supply, and the Boost mode is now working. it can boost to 50V with LV at 12V/10A and a load of 30 ohms on the HV side. Thank you for the advice.

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RE: LM5170EVM-BIDIR: Low output voltage