STMicroelectronics AN2272 VIPer12A-based Low Power AC/DC Adapter Application Note

AN2272 is an ST application note that describes the design of a low power AC/DC adapter based on the Viper12A monolithic device. The adapter has an output power of 4.1W and can handle a wide range input voltages (88VAC to 265VAC).

Brand: STMicroelectronics
Category: Other Electronics
Document type: Application Note
Language: English
Pages: 33
File format: PDF
File size: 1.3 MB
Published: 06 August, 2012
Updated: 01 October, 2023
Model: STEVAL-ISA011V1
MD5 checksum: A502985CDAF0D572F6F57ACF83419D29
PDF: STMicroelectronics AN2272 VIPer12A-based Low Power AC/DC Adapter Application Note PDF

About this manual

The document details the design of the STEVAL-ISA011V1 evaluation board, which implements a current mode flyback converter using the VIPer12A chip. It covers primary and secondary side component selection, including input capacitors, transformers, and output diodes, with specific calculations for operating in Discontinuous Conduction Mode (DCM).

What's inside

Board Design
Primary Side Design
Transformer Selection
Secondary Side Design
Feedback Loop
Board Tests
Start-up Tests
Temperature Tests
Dynamic Load Regulation
EMI Tests

Specifications

Output Power	4.1W
Input Voltage Range	88VAC to 265VAC
Switching Frequency	60kHz
Operating Mode	Discontinuous Conduction Mode (DCM)

Frequently asked questions

What is the output power of the adapter described in this note?

The adapter has an output power of 4.1W.

What is the input voltage range supported by the adapter?

The adapter handles a wide range of input voltages from 88VAC to 265VAC.

In which conduction mode does the converter operate?

The flyback converter is designed to work in Discontinuous Conduction Mode (DCM) in all operating conditions.

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