all home built solar system

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Solar Mike Guru Joined: 08/02/2015 Location: New Zealand Posts: 1201	Posted: 04:32am 02 May 2021         wiseguy said   Mike I bought some ZXGD3005's but I haven't used them - they intimidated me - they were bordering on invisible & even with their generous current ratings I couldn't bring myself to design them in as although I can and have designed smd for years, when I cant rely on pick and place machine and a reflow oven it all gets too hard for my old eyes. Yeah they are pretty tiny, I just use a hot air gun to solder them, and a pair of x4 reading glasses, not too much of an issue really.   wiseguy said   They are the UCC53##UCC5310.pdf series of opto isolators. only one in the series has an UVlockout of 8 volts (the one I am using with 12V) the others have a UVLO of 12V and need ~ 15V supply. They have a variety of flavours and drive currents up to typ 10A+, handling split pull up/down resistors, negative bias, miller clamp etc.  Their common mode transient immunity starts at 100KV/uS and their small propagation delays and tight part to part skew is attractive  & they cost around a whole $2.50 - $3 from digikey.  They are in a SOIC8 but I forgive them that transgression and have designed a small SOIC8 to DIP8 adaptor that maintains good I/O isolation. IF they behave the way I hope they will, I might just move away from optocouplers. Have used the UCC5350SB 5 A and 5 A Split Output with 8 V UVLO, on many designs, they are an excellent replacement for older tech opto's. One could easily drive two parallel mosfets. Your idea of using multiple 4 mosfet stackable bridge modules combined together via their output inductors makes a lot of sense, it effectively prevents problems of getting a big bunch of 4 - 6 parallel mosfets to work together. If you want more output power then plug in more modules, brilliant. I will have a re-think about the board I'm currently working on. Cheers Mike