Scribd
Upload
2K views1 page

300W ATX Power Supply Design

This document provides a diagram and description of the components in a 300W ATX power supply. It includes an EMI filter, input line selector, power transformer, coupled output inductor, magamp chokes, half bridge converter, PWM IC, and opto-isolated feedback for bias supply. The power supply provides 5V/30A, 3.3V/28V, +12V/15A, -12V/0.8A, -5V/0.3A, and 5VSB/2A outputs.

Uploaded by

Widiyatmono St
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
2K views1 page

300W ATX Power Supply Design

This document provides a diagram and description of the components in a 300W ATX power supply. It includes an EMI filter, input line selector, power transformer, coupled output inductor, magamp chokes, half bridge converter, PWM IC, and opto-isolated feedback for bias supply. The power supply provides 5V/30A, 3.3V/28V, +12V/15A, -12V/0.8A, -5V/0.3A, and 5VSB/2A outputs.

Uploaded by

Widiyatmono St
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 1

INRUSH CURRENT INPUT LINE SELECT INPUT VOLTAGE SENSE

POWER
LIMITER (SHORT FOR 115VAC)
TRANSFORMER

8A/250V

COUPLED OUTPUT INDUCTOR

EMI FILTER BASE DRIVE


SIGNAL
TRANSFORMER

MAGAMP
CHOKES

COMBINED
FEEDBACK FOR
5V AND 12V
OUTPUTS
MAGAMP
REGULA-
HALF TOR FOR
BRIDGE 3.3V
CONVERTER

BIAS AND 5V
STANDBY
SUPPLY
PWM IC
BASED ON
FLYBACK
CONVERTER

300W ATX POWER


SUPPLY:

5V/30A, 3.3V/28V
OPTO-ISOLATED +12V/15A, -12V/0.8A,
Annotated by FEEDBACK FOR -5V/0.3A, 5VSB/2A
http://www.smpspowersupply.com/ BIAS SUPPLY

You might also like