|
 |
DiscoverCircuits.com -- Hobby Corner
Last Updated on:
Tuesday, June 01, 2021 03:06 PM
Hobby Circuits List
The contents &
graphics of Discovercircuits.com are copyright protected.
LINK to Dave's circuit, but DO NOT COPY any files to your WEB
SITE server |
|
|
|
|
More
Line Power
|
|
Miniature 5v Line-Powered
Isolated Supply July 20, 2009 |
Often a circuit requires a 5v DC supply to power some logic circuits. The
conventional method is to use an AC wall adapter. But, many systems, which
bring AC power onto a circuit board, need a small AC to DC power supply right on the
circuit board. The circuit below provides such a supply. It uses a
classic series capacitor charge pump which acts as a current limiting device.
A full wave rectifier, a filter capacitor and a zener diode provide an off-the-shelf
isolated DC to DC converter with a 24v DC input. The miniature converter from
CUI generates a regulated +5v output, rated at 100ma. By doubling the size of
the capacitor C1 the circuit can be pushed to produce 200ma of output current.
Also, the same front end circuit can be used with other CUI converters. They
sell 3.3v, 12v and 15v supplies as well as the 5v unit shown. |
|
|
|
|
Click on Circuit Below to view PDF of Schematic |
|
 |
|
|
|
|
|
|
