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KyranF
KyranF
22:58
Anyone have hints for how to improve the no-load current draw of a Boost converter going from 6v up to 26v? I'm using a TI LM51231-Q1 switching at 500Khz with a 4.7uH inductor, two Mosfets, and fairly high output bulk capacitance ( 4 x 330uf aluminium caps)

I am getting a crazy 60-80mA drain on my board with no output load. The caps charge to 26V and it seems fairly stable, yet there's huge wastage on the input- which is a battery in this case and no good for battery life.
KyranF
KyranF
23:31
ah, so I think the small inductor value + 500 Khz + the fact it's a dual MOSFET synchronous converter is what is screwing me. I am going to change it to a non-sync diode-based boost converter, then it doesn't have to pretend to be a diode and only switch when it needs to, for lower current consumption when it's idle 99% of the time.

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