So you mean your output power circuit should be able to supply a
variable Voltage output from 0 to +10Vdc @ max 20A. The load is 0.5 Ohms
and will dissipate 200 Watts when your circuit deliver 10Vdc @ 20A.
What kind of load is that? Resistive? Inductive? Motor Inductive?
Thermal effected (PTC/NTC)?
How is your power source? Batteries? Linear Power Supply? Switching
power supply? other?
20 Amperes is somehow high but *not that high* current. If you think
about it, a regular electric shower goes close in AC.
For low voltage like that (10Vdc), there are plenty of "automotive"
solutions components. The major decision will be based on the type of
load (resistive, inductive, etc).
Some possible designs include: Linear Regulation, Pulse Width
Modulation - PWM (Dutty-Cycle or TDM), Switching Power Supply - SPS, and
other.
All of them should include a "regulation feedback" using one of several
choices from your load.
But again, your load characteristics will dictate how it could be done.
Ken Godee wrote:
{Quote hidden}>
> A little knowledge makes a guy dangerous (me).
> The load to be controlled will use varying 0-10 +vdc and 0-20 Amps.
> The 0-10 +vdc is no problem using a pic/dac combo, but I'm a little
> confused on what I should be using/doing to handle that kind of
> current?
> Any suggestions we be great.
>
> The Perfect Image Graphics Co.
> 2429 W. 12th St.
> Tempe, AZ 85281
>
> 800-533-8732
