LMR51430: Not Getting out put voltage from 24V to 16V

Hi Sir,

Did you mean that the schematic need some review ? 

B R

Colin

Hi Sir,

Could you provide the SW for further check? and you can test the EN and FB voltage to make sure that circuit is at normal condition.

Thanks

Colin

Hi Colin,

  Thank you...

R141 , R139 , R89 , R140(input & output of regulator resistors) Removed on board and supply given from external power supply. Still its not getting out put voltage.

EN - Getting 16V

FB - Not getting any voltage

BR,

Harish

Hi Sir,

You can check SW and CB node to see its waveform and also check whether the inductor is welded properly.

Furthermore, you can attach PCB layout for check, thanks.

Colin

Its showing nothing on this pins. for PCB layout please find the below link

https://drive.google.com/file/d/1YgtU9iOZtIOu1JQJDCipxClkg0vR44vN/view?usp=drive_link

for schematic refer below link.

drive.google.com/.../view

CB pin getting same input voltage (Vin 20V )

Hi Sir,

Could you provide SW node waveform to me and I suspect there is something wrong with your soldering.

Colin

It is on SW pin signal