Re: Power supply softstarts

>
> http://www.thermometrics.com/assets/images/cl.pdf
>
> To test this out, you can just rob a bunch out of some old computer

power

> supplies, paralleling them (most likely) until you get what you

want.

>

Another addition is a potential relay. Many air conditioners have a
potential relay so as to allow the compressor to use a starting
capacitor. once the realy gets to something like 80% of line voltage,
it then changes state and you get across the line voltage.

The problem with thermistors is they have different resistances
depending on the chip temperature. for a brown-out, they would not
properly protect the circuit although at such time the caps would be
at least partially charged.

Another option, and one I'm only tossing out as an idea, is to use
some sort of semi-conductor and just PWM it until it reaches some
high percentage of the expected power supply voltage.

Dave

Dave