STEVAL-ISA007V1| Datasheet

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STEVAL-ISA007V1
High power 3-phase auxiliary power supply evaluation board Based on L5991 and ESBT STC08DE150HV
Preliminary Data

Features

3-phase 150W auxiliary dual output SMPS Input: 400Vac +/- 20% Output voltage 1: 24V, 6.25A @ 90kHz Output voltage 2: 5V, 0.075A @ 90kHz Auxiliary output voltage: 15V, 0.01A Maximum output power : 150W Efficiency > 85% Switching frequency > 90kHz Stand-by switching frequency > 35kHz Feedback: secondary regulation STEVAL-ISA007V1

Description
Auxiliary SMPS is particularly affected since it is the entry point for all the biasing of control ICs and cooling system powering. Standardization towards "universal input" is reflected in more stressful conditions for the power transistor used as the main switch both in terms of blocking voltage or current capability. Since almost all auxiliary power supplies are based on fly-back converters, the need for a blocking voltage as high as 1500V and over, coupled with high switching frequency operations, make the ESBTs the perfect choice for such power supplies. The STC08DE150HV, in conjunction with the PWM L5991, perfectly fulfills the requirements and brings high efficiency to the system

ST components

STC08DE150HV Emitter Switched Bipolar Transistor, 5A, 1500V, TO247-4L HV leads L5991A PWM SMPS controller, DIP-16 TL431AI shunt reference, 2.5V, 1mA...100mA, TO-91 PN2222A small signal bipolar transistor, NPN, 40V, 0.6A, 330mW,TO-92 STTH102 high voltage ultrafast diode, 200V, 1A, DO-41 1.5KE400A transil, 400V, 1.5kW, DO-201 STTH108 high voltage ultrafast diode, 800V, 1A, DO-41 STTH3002CT high efficiency ultrafast diode, 200V, 30A, TO-220AC

June 2007

Rev 2

1/5
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This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.