Guru
Joined: 21/06/2018
Location: AustraliaPosts: 1267
| Posted: 02:39pm 01 May 2021 |
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.
....some Hours later - we had guests tonight and I missed the party here :(
I decided to be a bit of a trailblazer and recently designed a cascade-able power bridge stage using pretend optocouplers, the capacitively coupled isolators. They looked to be an answer to a Maidens prayer.
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.