SMPS 14V@20A

SMPS (Switch Mode Power Supply) is an electronic power supply. These are classified into four types based on the input and output voltages.
• DC to DC
• AC to DC
• AC to AC
• DC to AC
In this post we will concentrate only on AC to DC (also called off-line DC power supply) converter. The input voltage is normal AC mains and the output rating is 14V@20A. The main blocks in this SMPS are Controller card and Switching Circuit . The functionality of the card is to Sense the output Voltage and Current. We used N-Channel Power MOSFETS (IRFP460) for Switching purpose. It has HY3845 which is fixed frequency current mode PWM controller.
The preview of controller card schematic and image is given below:-

                                                             a. Schematic of Controller Card

                                                                  B. Picture of Controller card
Pictures of the SMPS is given below:-

This power supply can also be used for SSB Transmitter.
We shall keep updating the post for more information. Suggestions are most welcome.