STEVAL-ISA019V2: 80W, 24V @ 3.3A, 160 ~ 550VAC

Summary

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.

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.

* Based on eval Board STEVAL-ISA019V2

Specifications

Manufacturer	STMicroelectronics
Category	AC/DC and DC/DC Conversion
Sub-Category	AC/DC SMPS - Single Output
Eval Board Part Number	497-6339-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	24 V
Current Out	3.3 A
Output Power	80 W
Features	Over Current Protection Under Voltage Protection, Brown-Out
Efficiency @ Conditions	>80%, 250V in, 24V @ 20 ~ 80 W >75%, 850V in, 24V @ 25 ~ 80 W
No-load Input Power @ Voltage
Switching Frequency	50 kHz
Internal Switch	No
Component Count + Extras	58 + 2
Voltage In	160 ~ 550 VAC
Design Author	STMicroelectronics
Application / Target Market	Power: Auxiliary Power Supply Welding Machines
Main I.C. Base Part	L6565 STC04IE170
Date Created By Author
Date Added To Library	2017-05