文档介绍：Computer Power Supply- Reviews, Wiring, Repair, Schematics
A GUIDE PUTER POWER SUPPLIES:
TYPES, REVIEWS, SCHEMATICS, REPAIR GUIDES, AND OTHER INFORMATION
Computer power supply unit (PSU) is the device that converts the input AC
Home
voltage to the DC voltages needed by the puter. Since the
Tutorial
introduction of IBM PC/XT there have been about a dozen of different PC
Topologies
types (such as AT, Baby AT, LPX, ATX, BTX, SFX, PS3, WTX, TFX, LFX,
SMPS design
CFX, EPS) that differ by their structure, form factors, connectors and volt/amp
Software
ratings. Output rating of a puter power supply is ranging
PCB design
anywhere from 185 W to two kilowatt. PSU over 400W are used mainly for
Computer PSU
Extreme Gaming & Media Entertainment PC, SLI support, as well as servers
UPS
and industrial PCs.
ics
EE Reference Today's standard desktop PC PSU produces the following DC outputs: +5V,
Inverters +, +12V1, +12V2, -12V and standby 5V. Additional "point of load" DC-DC
Thermal converters step down 12V to the CPU core voltage and other low voltages
Generators needed for ponents. All outputs should have a separate
Links current limit to meet 240VA safety requirements of EN 60950, although in
Terms of use practice 12V rails usually have bined current limit. To support PCI
Express requirements in the new systems the old 2x10 main power connector
has been replaced by a 2x12 connector. An extra cable with 2x2 power
connector is used for the second 12V rail that supports the processor's
voltage regulator. There are also peripheral, floppy drive, and serial
ATA connectors. The PSUs for high-end discrete graphics cards have an
additional 2x3 or 2x4 connector to supply extra power to graphics card that
require more than 75 Watts of total power. Older motherboards also used an
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Computer Power Supply- Reviews, Wiring, Rep