The output of this power supply is an isolated 3.3V/10A output, produced from an input is 36-72V DC. Airflow is required at higher ambient temperatures to get the full rated power.
The topology used is a single transistor forward, with a reset winding on the transformer to reset the core. The maximum duty cycle is less [...]
This is the DC switching regultor Voltage 5V at current 3A. It is make for digital circuit.
The important part of the circuit is LM2673, it is 3A Step-Down Voltage Regulator with Adjustable Current Limit. View Circuit
The LM2673 is Simple and easy to design with using off-the-shelf external components.
please see circuit diagram and read more source.
http://www.national.com/pf/LM/LM2673.html
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When i want 5V switching regulator (mini project),so i am used input is 9V battery.
The good circuit for work is the IC LT1073-5 (see detail in www.linear.com), it out put 100mA current.
The zener diode is 1N5818,L1 = 100uH
Detail more please see in image.
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