current limiting PS and PIC

I am looking to design a current limited, 2-6A, power supply controlled
by a PIC.  Consumer electronic "smart microprocessor"  battery chargers
seem to know how to regulate the current.

Any thoughts?

Anchor wrote:

> I am looking to design a current limited, 2-6A, power supply controlled
> by a PIC.  Consumer electronic "smart microprocessor"  battery chargers
> seem to know how to regulate the current.
> 
> Any thoughts?

Google for "foldback current limiting" w/o quotes

Anchor wrote:

> I am looking to design a current limited, 2-6A, power supply controlled
> by a PIC.  Consumer electronic "smart microprocessor"  battery chargers
> seem to know how to regulate the current.
> 
> Any thoughts?

I am trying to remember if there was an explanation of the linear version 
of a foldback current regulator in Horowitz & Hill. Adding a microprocessor 
control to that should not be too difficult. You should, however, look 
quite closely at the consequences of losing control of the voltage and 
current outputs. You will need to make sure that you know, should the 
microprocessor suddenly halt with a fault, the outputs attain a safe state 
(most likely off).

-- 
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Paul E. Bennett ....................<email://peb@amleth.demon.co.uk>
Forth based HIDECS Consultancy .....<http://www.amleth.demon.co.uk/>
Mob: +44 (0)7811-639972
Tel: +44 (0)1235-811095
Going Forth Safely ....EBA. http://www.electric-boat-association.org.uk/
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