STEVAL-ISA011V1: 4.1W, 4.5V @ 900 mA, 88 ~ 265VAC

Summary

This application note describes a low power, (output power of 4.1W) general purpose adapter which is able to handle a wide range input voltages (88VAC to 265VAC). The adapter (Order Code STEVAL-ISA011V1) is based on the Viper12A monolithic device that has the power switch as well as the basic control function needed to implement a current mode flyback converter.

The flyback converter is designed to work in Discontinuous Conduction Mode (DCM) in all operating conditions (i.e. Minimum Input Voltage, Maximum Load), because it provides better dynamic performance.

Specifications

Manufacturer STMicroelectronics
Category AC/DC and DC/DC Conversion
Sub-Category AC/DC SMPS - Single Output
Eval Board Part Number 497-6413-ND
Eval Board Supplier STMicroelectronics
Eval Board Board not Stocked
AC Voltage 115 V
230 V
Universal (115 / 230V)
Outputs and Type 1 Isolated
Voltage Out 4.5 V
Current Out 900 mA
Output Power 4.1 W
Features Light Load Mode
Over Current Protection
Over Voltage Protection
Short Circuit Protection
Thermal Protection
Under Voltage Protection, Brown-Out
Zero Load Regulation
Efficiency @ Conditions >70%, 230V in, 4.5V @ 900 mA
>70%, 115V in, 4.5V @ 900 mA
No-load Input Power @ Voltage
Switching Frequency 60 kHz
Internal Switch Yes
Component Count + Extras 31 + 2
Voltage In 88 ~ 265 VAC
Design Author STMicroelectronics
Application / Target Market Power: AC Adapters
Set-Top Boxes
Main I.C. Base Part VIPer12A
Date Created By Author
Date Added To Library 2011-03

Support Documents & Media

VIPer12A-E - Datasheet STEVAL-ISA011V1 - User Guide AN2272

Media

STEVAL_ISA011V1_Schematic.JPG STEVAL_ISA011V1_Board.jpg