[volt-nuts] Lm399 heater

[Bob Smither]

On 09/14/2012 07:04 PM, Fred Schneider wrote:
> Is the heater from a LM399 regulated, so it stayes at 85 degrees or is it
> just drawing an vast amount of current like a lightbulb ? So if it gets
> hotter around the LM the heater temp stays the same ?

It is regulated to a nominal 90C.  When power is first applied heater current
spikes to typically above 120 mA.  After a few seconds it drops to a 10 - 40 mA
(depends on heater voltage level and environment).

-- 
Bob Smither, PhD                                   Circuit Concepts, Inc.
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"The beauty of the second amendment is that it will not be needed until
they try to take it." --Thomas Jefferson
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Smither at C-C-I.Com  http://www.C-C-I.Com  281-331-2744(office)  -4616(fax)
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