Load Dump/Transient Protection.

Oct 26, 2005 24 Replies
J

You kids! No historical background! We were already building silicon integrated circuits in commercial quantities.

...Jim Thompson

| James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
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M

agreed, you want to OPEN the connection to the protected device when the input voltage is too high....

think series high voltage transistor with a control circuit that turns OFF the transistor when the input voltage gets too high..

You can make shunt protection work if your load is very low current, and you can put say a 100 Ohm resistor in series before the shunt protection.

Mark

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J

get a tougher regulator.

Bye. Jasen

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J

no there's the current in the altenator's field coil, until that decays the altenator is still generating electricity. it won't take long (less than a second) but it's not instant.

Bye. Jasen

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J

you don't need to absorb it, if your switching components are hardened enough they can block it.

it may also be possible to modify the altenator to reduce the field decay time.

Bye. Jasen
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