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diode protection for MOSFET output?

R

R.Legg

Jan 1, 1970
0
Robert Morein said:
Sorry, the supply rails are +/- 50V.

Providing the supply rail is decoupled locally, freewheeling energy
should be returned to the rails through the fet switch body diodes,
without overvoltages occurring on the driven node.

You can expect to see voltage stress on your switches equal to the
total supply rail - ie 50+50=100. Normally you would employ switches
that have some book margin on the stress levels expected.

RL
 
R

Robert Morein

Jan 1, 1970
0
R.Legg said:
Providing the supply rail is decoupled locally, freewheeling energy
should be returned to the rails through the fet switch body diodes,
without overvoltages occurring on the driven node.

You can expect to see voltage stress on your switches equal to the
total supply rail - ie 50+50=100. Normally you would employ switches
that have some book margin on the stress levels expected.

RL

I'll knock the supply rails down some more, perhaps to 35V. Thanks.
 
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