Concept : To develop a efficient low power supply we need to cut looses of general supply available in the market.
In this Idea , I am giving you the link of award winning design of power supply and few other links so you can complete this project and will able to develop low cost and efficient power supply.
Award winning Power Supply Design
High-Efficiency Power Amplifier Using Dynamic Power-Supply Voltage for CDMA Applications
The Design of a High Efficiency RF Power Amplifier for an MCM Process
An Efficient Digital Sliding Controller for AdaptivePower-Supply Regulation