Other Parts Discussed in Thread: LM5155, LM51551
Hi There,
I am using LM3478MAX in a Sepic topology for a buck-boot operation. I have followed the Webench design guide. The issue is when I try to power ON the circuit it loads down the bench top DC power supply. I observed that the inrush current is over 2Amps at the start-up and due to this the bench top supply is going into over current mode and shutting down. Please note that there is no load on the 24V output in our application. It will come in picture as and when required. For testing, I tried providing 150mA steady load (resistor) but still its not working.
Can you please let me how can I over come this inrush issue at the bootup ?
Attached is the snapshot of circuit on board and also the webench design.
Thanks..!!!