STEVAL-ISA017V1 datasheet(1/4 Pages) STMICROELECTRONICS

Part #	STEVAL-ISA017V1

Description	Switch mode Quasi-Resonant Flyback Power Supply

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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Data Brief

For further information contact your local STMicroelectronics sales office.

March 2007

Rev 3

1/4

4

STEVAL-ISA017V1

Power supply for STB based on L6565 (US-110 V)

Features

■ Switch mode Quasi-Resonant Flyback Power

Supply

■ Input: 88 to 138 Vac (US version)

■ Switching frequency: 50/60 Hz

■ Output1: 12 V @ 500 mA delivering 6 W with

± 10% of stability

■ Output2: 8 V @ 40 mA delivering 0.32 W with

± 15% of stability

■ Output3: 5 V @ 1 A delivering 5 W with

±5% of

stability

■ Output4: 3.3 V @ 450 mA delivering 1.485 W

with

± 2% of stability

■ Output5: 1.23 V @ 1 A delivering 5 W with

± 5% of stability

■ Output6: 2.5 V @ 0.7A delivering 1.75 W with

± 2% of stability

General description

This document describes a reference design of a

17 W Switch Mode Power Supply dedicated to

Set-Top Box applications. The board accepts US

input voltages (90 to 265 Vrms) and delivers up to

6 W outputs. It is based on the L6565 quasi

resonant SMPS controller, working in variable

frequency mode.

The Quasi-resonant operation and the high

flexibility of the L6565 make it a very suitable

device, able to satisfy all the requirements with

only few external components.

ST components

■ STTH108 High Voltage Ultrafast Rectifier, 1 A,

800 V

■ SMBYW02-200 High Efficiency Fast Recovery

Rectifier Diode, 2 A, 200 V

■ STPS5L40 Power Schottky Rectifier, 5 A, 40 V

■ STPS5L25B low drop power Schottky Rectifier,

3 A, 40 V

■ STPS340 Power Schottky Rectifier, 3 A, 40 V

■ L6565 Quasi Resonant SMPS controller

■ L5973D step down switching regulator up to

2.5 A

■ LD29080DT25, 800 mA fixed and adjustable

output, very low dropout voltage regulator

■ STD5NK50Z, N-channel zener protected

SuperMESH Power MOSFETs, 500 V,

1.22 Ohm, 4.4 A

STEVAL-ISA017V1

www.st.com

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