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That DC/DC converter is quite large and expensive for the rated power, no? If you’ve got a stable low-impedance DC source, I imagine you could do a lot better following a TI application note :)

I picked up a very tiny 65W GaNFET usbC brick recently, I’ve been curious to see DIY projects put that technology to use. Marginally higher part cost but significantly better efficiency.

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There's definitely ways to shrink this down and I tried to address that in the initial DC-DC selection. The minimum supply that certain P-Series Lenovos require is 135W, while this module is rated for 150W, it is available surplus for relatively cheap (40$) without requiring building a full enclosure.

Looking forward to taking a second pass at this and shrinking it down.

at the moment it's somewhat smaller than the stock 'brick':

https://transistor-man.com/PhotoSet/lenovo_dc_supply/P113071...

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