On 17/01/2013 3:06 PM, Bob Axtell wrote:
> This is really a stepdown regulated power supply project. You will need
> a good MOSFET, a fast diode, an inductor, a low ESD capacitor, then a
> pic10fxxx to drive everything. The PIC will charge the inductor, then
> the inductor will charge an output capacitor according to the PIC's A/D
> value. Another A/D input will have to be a reference voltage input, such
> as two 1n4148's in series.
>
> You might take a look at Roman Black's regulator, if I remember
> correctly, it is very close to what you need.

Will those solutions let me run the input right down to the target=20
voltage though? (12V out when input drops to 12V)

I was thinking the PWM should allow Vout to be the same as Vin (except=20
for the MOSFET loss) when the PWM is at 100%.
David...

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David Duffy        Audio Visual Devices P/L
Unit 8, 10 Hook St, Capalaba 4157 Australia
Ph: +61 7 38235717      Fax: +61 7 38234717
Our Web Site: www.audiovisualdevices.com.au
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