Filippo,
You're welcome, although I haven't really been of much help. Sorry about missing that UVLO spec, you're right, the chip doesn't work below 21 V. The LM5022 looks good to me. The pmp9334 design using the auxillary winding is a good way to get…
Hsiang
The UCC28880 & UCC28881 can operate down to 30 V minimum, but the range from min to max input voltage will be limited by the ratio of Dmin (at max Vin) to the internal time-out Ton_to (for overlaod & short-circuit protection).
However, the…
