STMicroelectronics AN2844 Application Note: 15 W SMPS for Metering

This document describes a 15-W flyback switched mode power supply (SMPS) application that uses an emitter-switched bipolar transistor (ESBT™) switch (STC03DE220HV) and L6565 quasi-resonant pulse-width modulation (PWM) controller. The application is a universal, cost-effective flyback converter used in metering applications, with an excellent wide-voltage input range from 125 to 1250 VDC, achieved using the ESBT as the main switch and a quasi-resonant PWM driver.

Brand: STMicroelectronics
Document type: Application Note
Language: English
Pages: 37
File format: PDF
File size: 1.4 MB
Published: 06 August, 2012
Updated: 29 September, 2023
MD5 checksum: 79314F99B5BF20C556BCC87B04978FF0
PDF: STMicroelectronics AN2844 Application Note: 15 W SMPS for Metering PDF

About this manual

The document details a cost-effective, non-galvanic isolated flyback converter suitable for metering applications. It features an emitter-switched bipolar transistor (ESBT) switch and operates with a wide input voltage range from 125 VDC to 1250 VDC.

What's inside

Introduction
Adapter features
Circuit description
Waveforms and results
Electrical performances
Functional check
Thermal measurements
Bill of materials
PCB layout
Transformer specification

Specifications

Minimum input voltage	125 VDC
Maximum input voltage	1250 VDC
Output voltage	5V-3.0A
Maximum output power	15 W
Minimum switching frequency	30 kHz
Overall converter efficiency	> 60%

Frequently asked questions

What is the input voltage range for this application?

The operational voltage ranges from 125 to 1250 VDC.

Which controller and switch are used in this design?

It uses an L6565 PWM controller and an ESBT STCO3DE220HV switch.

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