STEVAL-IPB001V1: 2W, 24V @ 83mA, 106 ~ 848 VAC


This document describes how to design a 3-phase (106 ~ 848 VAC) power supply with the UC3845B PWM driver and the new STC04IE170 ESBT as main switch. It is associated with the release of the STEVAL-IPB001V1 demo board.

The design is a complete solution for the 2 W single output SMPS, which is widely used as a power supply in breaker applications. However, the design method can also be applied to an SMPS suitable for 3-phase power metering applications, as it can easily be upgraded for higher output power.

In this report particular attention has been paid to the ESBT base driving circuit, where some useful methods have been investigated to better optimize power dissipation.


Manufacturer STMicroelectronics
Category AC/DC and DC/DC Conversion
Sub-Category AC/DC SMPS - Single Output
Eval Board Normally In Stock
AC Voltage 115 V
230 V
Universal (115 / 230V)
190 V
208 V
277 V
347 V
380 V
400 V
415 V
480 V
600 V
Outputs and Type 1 Isolated
Voltage Out 24 V
Current Out 83 mA
Output Power 2 W
Features Under Voltage Protection, Brown-Out
Voltage Reference
Efficiency @ Conditions >80%, 110V in, 24V @ 83 mA
>60%, 760V in, 24V @ 83 mA
No-load Input Power @ Voltage - Not Given
Switching Frequency 50 kHz
Internal Switch No
Component Count + Extras 37 + 2
Voltage In 106 ~ 848 VAC
Design Author STMicroelectronics
Application / Target Market Breaker
Power: Auxiliary Power Supply
RF: Metering
Main I.C. Base Part STC04IE170
Date Created By Author
Date Added To Library 2022-03