TPS54062: TPS54062

user5778902

Part Number: TPS54062

Hi, I build a DC-DC buck regulator using TPS54062. I share the schematic that I draw. Its output voltage should be stable but it's not when I change the input voltage. When I apply 30Vdc Input voltage TPS54062 provides 12.7VDC and when I apply 20Vdc input voltage it provides 10Vdc. What could be the problem? What should i look for? Thanks.

over 7 years ago

0 Katelyn Wiggenhorn over 7 years ago

TI__Genius 11040 points

Hello,

You want to monitor the SW Node, Input Voltage and Output voltage for any instabilities at VIN=30V and VIN=20V. Possible there is a stability problem which is causing your output voltage to drop.

You can also compare your component selection to the Excel Calculator Tool which you will find on the Tools Tab of the product page.

Best Regards,
Katelyn Wiggenhorn

0 user5778902 over 7 years ago in reply to Katelyn Wiggenhorn

Prodigy 30 points

Thanks. I changed my compansation circuit components' values according to the tool. Works fine.

0 Katelyn Wiggenhorn over 7 years ago in reply to user5778902

TI__Genius 11040 points

Hello,

I am happy to hear that your circuit is working as expected.

Best Regards,
Katelyn Wiggenhorn

Power management

Power management forum

TPS54062: TPS54062