AN2495 datasheet(1/36 Pages) STMICROELECTRONICS

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AN2495 Datasheet(PDF) 1 Page - STMicroelectronics

Part #	AN2495

Description	The purpose of this application note is to explain the design

PDF	36 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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1 / 36 page

April 2011

Doc ID 13127 Rev 5

1/36

AN2495

Application note

3-phase 80 W SMPS with very wide-range input voltage

based on the L6565 and ESBT® STC04IE170HV

Introduction

The purpose of this application note is to explain the design of an 80 W 3-phase auxiliary

power supply for motor drives and welding applications. To reach a high level system in

terms of both efficiency and cost, the L6565 PWM controller has been selected as well as

the STC04IE170HV as the main switch. The combination of these STMicroelectronics™

parts provides a highly efficient solution for high DC input voltage, a typical requirement of

any three-phase application. The L6565 driver is a variable frequency PWM driver suitable

for a design flyback converter working in quasi-resonant mode. It also includes some very

useful additional features.

The frequency response study reported in the this document is carried out using MATLAB.

All the design choices are thoroughly discussed to allow the user to adapt the project to

specific needs. The input voltage can also be extended up to 1000 VDC as enough margin

exists to do so. Finally, the experimental results are analyzed to better understand the

benefits offered by the use of ESBT® in this application.

The document is associated with demonstration boards STEVAL-ISA019V1, STEVAL-

ISA019V2 and STEVAL-ISA019V3 (Figure 1).

Figure 1.

80 W 3-phase SMPS (working prototype)

www.st.com

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