Boosting Power Supply Efficiency for Desktop Computers

Focus:

The efficiency of ATX power supplies can be improved by 1) switching from passive power factor correction (PFC) to active PFC, 2) changing from traditional single-switch forward topology with reset winding to a forward topology with active clamp reset or a half-bridge topology in the main power stage 3) switching from Schottky rectifiers to synchronous MOSFET rectifiers and 4) other component improvements.

What you’ll learn:

• How to improve the efficiency of ATX (desktop computer) power supplies
• How to meet 80PLUS energy efficiency requirements
• How to make an ATX power supply lighter, smaller, and quieter

View the Source

Author & Publication:

Dhaval Dalal, Technical Marketing Director, Power Supplies, ON Semiconductor, Phoenix, Power Electronics Technology, Feb 01 2005

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