Car power

[4u2n]

Hi

I am new here.. :shock:

I need to build a power supply

input 10-18 volt
output 12 Volt 5 Amp

best if it is a small switch mode power

 

[Someone Electro]

http://www.discovercircuits.com

 

[mohandessina]

voltage regulator

this is a voltage regulator but i think you should work on it.

 

[Oznog]

There are two ways to do this:
1. Make a transformer or boost converter to guarantee you have at least 12V. The boost converter can't drop voltage, the lowest it goes is to act as a straight wire, so you could do a voltage regulator to drop it. This can generate buttloads of heat, if you have 18V@5 amps to 12V, that's 30 watts of heat!
2. Look up a "buck boost converter" instead. Cascade works well, but requires two inductors and for the currents you mention they'll need to be big 'uns, and two PWM inputs. There's the Cuk converter too, only one PWM stage, but it will invert the output to positive ground.

 

[4u2n]

Hi

I am new here.. :shock:

I need to build a power supply

input 10-18 volt
output 12 Volt 5 Amp

best if it is a small switch mode power

I found a diagram with small help

Now ? is I want to change to 5A