georges80
Flashlight Enthusiast
Apr 23. Below is the original post. Since the prototype stage, the driver has evolved into the H6CC and can output up to 6.7A.
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Well, until I think of a better name - high five constant current...
5A buck converter prototype. This is actually a hyperbuck driver that I realized already had all the guts to deal with 5A output - if I just changed the inductor, sense resistors and increased the switching frequency a bit from the hyperbuck configuration.
Anyhow, here's a picture that should say it all:
Running just over 81% efficiency with 3.4V output and 14V input - which is not bad given the large voltage in / voltage out delta.
My load is 2 x P7 in parallel to deal with 5A output.
Been running for 30 minutes and totally stable. Given it's based on the proven hyperboost and hyperbuck architecture I'm pretty confident with the 5A output. Lots more tests to do to characterize efficiency over various input/output combinations.
I also need to re-lay the PCB into a round shape to make it CPF friendly
cheers,
george.
-------------------------------------------------------
Well, until I think of a better name - high five constant current...
5A buck converter prototype. This is actually a hyperbuck driver that I realized already had all the guts to deal with 5A output - if I just changed the inductor, sense resistors and increased the switching frequency a bit from the hyperbuck configuration.
Anyhow, here's a picture that should say it all:
Running just over 81% efficiency with 3.4V output and 14V input - which is not bad given the large voltage in / voltage out delta.
My load is 2 x P7 in parallel to deal with 5A output.
Been running for 30 minutes and totally stable. Given it's based on the proven hyperboost and hyperbuck architecture I'm pretty confident with the 5A output. Lots more tests to do to characterize efficiency over various input/output combinations.
I also need to re-lay the PCB into a round shape to make it CPF friendly
cheers,
george.
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