LM2679: Ouput Varying with varying input for constant 12 v IC

Lenin B

Part Number: LM2679

Hi,

We needed 12v from 24v supply so we are using the constant out LM2679SX-12 but when then inout voltage is slightly increasing let say 25/26 v the outpu is also increaseing from 12to16v can suggest any ideato rectifi

this.

WBDesign49_Bode Plot-1.pdf

over 2 years ago

0 Frank De Stasi over 2 years ago

TI__Guru 74055 points

Hello

First, double check that you have all the correct components installed.

Then double check your PCB layout.

Monitor the voltage on the SW pin and see if it looks correct.

Also, if you can show us images of your PCB layout we can evaluate it.

Thanks

0 Frank De Stasi over 2 years ago in reply to Frank De Stasi

TI__Guru 74055 points

Hello

I will close this post due to inactivity.

Thanks

Power management

Power management forum

LM2679: Ouput Varying with varying input for constant 12 v IC