Pda Dual

March 26, 2011 12:01 pm | Uncategorized | No comments

What is the circuit in a car phone charger-dual voltage input?
I have several multi-voltage (12/24) power supplies, phone, PDA, etc, and I wonder what kind of circuit is used to regulate the output voltage. Since the 24 volt input can vary from 19 26volts how to regulate the output of 5 volts or whatever? [...]