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Solid state relay

Posted 30th December 2011 at 10:55 PM by klewis
Updated 3rd January 2012 at 02:43 PM by klewis

Fets: http://www.diyaudio.com/forums/solid...relays-17.html

Pavel's Scheme http://www.diyaudio.com/forums/solid...ml#post2835407
Also see post #340, increase R1 to 100k and C3&4 to 47uf
recommendation for mosfets: #314
In general, you are seeking for a MOSFET with very high Vdsmax, very low Rdson and very high Idmax. Regarding Vdsmax, it must be higher than the sum of positive and negative supply rail voltage, and the output should be provided by clamping diodes connected to supply rails, reverse polarized. My tips are

Type Vdsmax Rdson Idmax
IRFB1227 200V 0.0197ohm 130A
IRFP90N20D 200V 0.023ohm 94A
IRF3710ZG 100V 0.018ohm 59A (too low Vdsmax to me)
IRFS59N10D 100V 0.025ohm 59A (too low Vdsmax to me)
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