Well, the BPC856 datasheet says it's rated for 80V, so if it's running at
350V then it's not suitable for this design.
I'd suggest looking for another PNP that can handle ~400V. Digikey has a
400V device that has an SOT-23 footprint (ZXTP08400BFFTA), so that's worth
looking into.
I doubt there
> The temperature problem is a good clue; there must be a larger transistor
> not shown in the schematic that is the actual driver, and I suspect it's
> overheating. Does it have a heatsink, and does it get warm/hot ?
>
One moment. Heat was in the environment while the whole thing was at rest:
we
The temperature problem is a good clue; there must be a larger transistor
not shown in the schematic that is the actual driver, and I suspect it's
overheating. Does it have a heatsink, and does it get warm/hot ?
Does the supply work correctly when illuminating shorter segments of EL
wire ?
The
