Bob, that is a neat trick!



-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of Bob Blick
Sent: Tuesday, December 28, 2004 12:02 PM
To: Microcontroller discussion list - Public.
Subject: Re: [EE:] Parallel Schottkys

> Can one parallel Schottky diodes?  Do they have the same characteristics
> as silicon diodes, and thus require current sharing resistors?

They both have negative tempco.

> IR makes some handy FETKY devices, with a Schottky diode and a FET in the
> same package.  I would need to parallel the FETS to get enough current
> capability, but I don't know about paralleling the Schottkys.

Hi Lawrence,

If the thermal resistance between the multiple devices is low, the
internal series resistance of the diodes is enough to prevent thermal
runaway. That is easily achieved by mounting the devices on the same
heatsink. Everyone does it.

Cheerful regards,

Bob



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