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In Reply to: Switching power supply, any downsides? posted by rlinder on April 18, 2003 at 12:47:44:
Switching power supplies are less reliable than linear, owing primarily to much higher component count and high operating voltages (switchers with power factor correctors step up the rectified line voltage to ~400VDC) in the primary converter circuits.Switchers also require a lot more AC input filtering to keep conducted noise from exiting the power supply down the input power cable. They generate more RFI as well, sometimes hard to tame in other circuit design that is powered by them. This RFI can possibly have some effect on other equipment in your system.
Upsides are small size/lighter weight/lower cost (those huge transformers in linear supplies cost a lot) and switchers with power factor correctors do a good job of looking like a resistive load to the power line which your utility company likes.
IMHO, switching power supplies have no useful purpose in any high end audio equipment. Switching power supplies are great in computers and other non-audio equipment.
G.
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Follow Ups
- Downsides... - Gepetto 16:25:48 04/19/03 (1)
- Re: Downsides... - NEAR SOTA 23:05:26 04/19/03 (0)
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