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TPS92512: Customer not getting correct output current and device is not able to be controlled via Iadj pin

Jeff Coletti
Expert 8755 points
Part Number: TPS92512

Hi Support team

Trying to debug this remotely for a customer. I have schematic and can share via email.

They are running at 1.8MHz, VIN-28v, Vout is 7-9v depending on LEDs Vf, current is 0.5A. 

they are using a 10uH inductor into 5.7uf. Feedback resistor is 0.56ohms. 

What they are seeing is 0.7A, and adjusting the Iadj voltage from 2~0v they see no change. 

Looking for thoughts, asked for a scope shot of the feedback voltage. 

Thanks 

Jeff Coletti