Hi Bob, > I have a question about protecting a circuit from an overvoltage > condition. We > have a new device that we are planning to use a regulated 5V wall-wart type > device for power. They have also requested overvoltage protection in case > someone plugs in a 6V or 8V unregulated supply by accident. My expertise > is mostly digital so I am not sure what the best and cheapest way to do this > would be. Thanks in advance for any help or pointers.
With a regulated poweradaptor you have some more costs than with an unregulated one. But you want extra electronics as a saveguard in your device. And how about the costs if you use an unragulated supply together with a voltage regulator/saveguard circuit? With a standard regulator you are save upto 35V. The are shortcircuit resistant. When you design a separate savequard circuit, you need a feedtrough transistor loosing some voltage. Besides you must have some protection circuitery. What will be the price. I think the former solution is cheaper and will to more than you want. Regards, Harry -- Author: H.C. Croon INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
