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Original question:

LM5122: pmp10749 boost converter with dual phase

LM5122: Does not work when initially set to 5 volts and limited below 1.25 Amps.

Electronx Electronx
Intellectual 285 points
Part Number: LM5122
Other Parts Discussed in Thread: PMP10749

Hi,I have designed LM5122 boost converter based on pmp10749 reference design . The converter does not work when initially power supply set to 5 volts and limited below 1.25 Amps(it kills the power supply).If I set the current above 1.25 amps(5V), it continues to work and the current drawn from the power supply becomes 0.19 Amps. By the way, there is no load in the circuit.Is it normal to want to draw high current momentarily at startup?