Last week I played a lot with SN6505 from TI… So much power in so small SOT23-6.
First and foremost, power source for VFD display (30VDC anode voltage, and ~2.5VAC for cathode)…
Efficiency at max current 95%! Amazing. Let’s try to get more power!
With load 3.6W, diodes are hot, transformer & SN6505 are cold, efficiency 83%…
With load 5W, input current 1.25A (max designed current 1A!) everything is very hot, efficiency still 83%… Worked without any problems for hours!
Transfomer output:
Frequency hopping to reduce EMI. Cool feature.
One snapshot. Looks great!
SN6505 output. Looks beautiful!