This document describes the application of ESBT STC03DE170HV in a 3-phase auxiliary power supply. It discusses the theory and evolution of ESBTs, as well as the characteristics and requirements of this application.
The document details the realization of a 50 W, three-phase auxiliary power supply starting from a bulk voltage of 750 V. It addresses the need for high breakdown voltage devices (up to 1700 V) and efficiency in such applications. The solution utilizes Emitter Switched Bipolar Transistors (ESBTs), specifically the STCO3DE170HV, which offer a cost-effective alternative to traditional power bipolar transistors or Power MOSFETs by combining high voltage capability with high switching frequencies.
| Power Output | 50 W |
|---|---|
| Input Bulk Voltage | 750 V |
| Main Switch Type | ESBT (STCO3DE170HV) |
| Converter Topology | Fly-back |
The STCO3DE170HV ESBT is used as the main switch for the fly-back converter.
The design starts from a bulk voltage of 750 V.