electronics call for advice
I'd add 2 current sense amplifiers so I can run it in discontinuous mode. Does this idea even make sense?
Is there an integrated solution for this problem? The closest to what I'd need was the LM5170-Q1 but that can only do 2-switch topology, so I'd need dedicated HV/LV sides. Or use both halves for a buck-boost with capacitive DC link in between, which doesn't seem like the best idea.
@uint8_t same price point as the LM5170-Q1 and probably easier to use in practice. So win-win
@uint8_t The LT8705 is really very versatile. I liked to design stuff with it, especially the 4 independent error amps. LTC3779 could also work for the same $$$ . 20Amps is a lot, maybe You need to parallel MOSFETs, watch out for the controllers capability to drive the FETs.
@DH0PE Thanks for the help! I got some nice trenchFETs with 4 mOhm RDSon ^^
Let see what inductor I can find... I can derate the current or make it dual phase.
@uint8_t low RDSon is one data, also the Gatecharge or Cdg is an important value. In most cases low RDSon an high Vds causes higher Cdg ... By the way You play with the LT8705 ver nicely in LTspice ...
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