DC converters configuration options

[davelectronic]

I've been looking for high current DC to DC converters, buck in particular.
High current units seem hard to find, just a couple of questions really. I'm looking to drop 19.5 Volts to 12.5 Volts, the source being relatively high current IT plug pack adaptors. Tried lower currents up to 4 Amps with good results. So just wandering is there a way to parallel converters to increase load current, and get the units to share evenly.
The other question was, can voltage droppers the 24 to 12 volts types be adjusted internally so it's dropping 19.5 down to 12 Volts.
If I could get buck converters to share load current, that would be great.
Thanks for reading.thoughts and ideas appreciated.

[Psi]

I dunno what the quality of these is like, but..

https://www.aliexpress.com/item/Adjustable-Voltage-Reducer-DC-DC-20A-300W-Power-Supply-12V-55V-to-1-25V-53V-Step/32817410116.html

https://www.aliexpress.com/item/300W-20A-DC-Buck-Module-Constant-Current-Adjustable-Step-Down-Converter-Voltage/32864475232.html

https://www.aliexpress.com/item/1Pc-DC-24V-To-12V-10A-15A-20A-25A-30A-Reducer-Voltage-Step-Down-Power-Supply/32839756029.html

The other question was, can voltage droppers the 24 to 12 volts types be adjusted internally so it's dropping 19.5 down to 12 Volts.

Yes, if you can find the low voltage shutdown circuit and change some resistor values then should be possible to make a 24V->12  run from 19V.
19V is close enough to 24 that the rest of the circuit should work ok.

Most of the 24-12V converters you see for sale are for getting 12V from a 24V lead acid battery and will shutdown at 21V.
Hence the need to tweak the low voltage shutdown circuit to keep them operating at 19V

[davelectronic]

Thank you for your reply, and thanks for the link. Might attempt looking into a dropper, with the intention of adjusting the input voltage range.