rhd
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I decided to take a stab at a higher current adjustable buck driver to cover the 2A to 5A range. This is what I came up with.
This is a schematic and board only. I haven't tested it, and won't be. I just needed some time to unwind, and Eagle was the answer I thought I'd share it in case anyone else wants to tinker around and test it out. I have no confirmation that the design will work (but I think it should).
As setup, the pot would adjust between 2.2A and 5A.
It's only 15 x 12 mm (it's a 4 layer board).
It uses the AX3116 which is a $3 IC when purchased 10x at a time. The other parts are all sourced from DigiKey (Digikey part numbers for some of the "tricky" parts are listed in text on the schematic). I haven't actually priced it out, but the whole board should be under $10.
Board and schematic files attached.
This is a schematic and board only. I haven't tested it, and won't be. I just needed some time to unwind, and Eagle was the answer I thought I'd share it in case anyone else wants to tinker around and test it out. I have no confirmation that the design will work (but I think it should).
As setup, the pot would adjust between 2.2A and 5A.
It's only 15 x 12 mm (it's a 4 layer board).
It uses the AX3116 which is a $3 IC when purchased 10x at a time. The other parts are all sourced from DigiKey (Digikey part numbers for some of the "tricky" parts are listed in text on the schematic). I haven't actually priced it out, but the whole board should be under $10.
Board and schematic files attached.
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