STEVAL-ISA081V1: 12V @ 1A, 3.3V @ 100mA, 85 ~ 305Vin

Summary

(From User Guide) The purpose of this document is to provide information on the STEVAL-ISA081V1 switched mode power supply (SMPS) demonstration board. The STEVAL-ISA081V1 is an isolated SMPS capable of delivering a 12 W output over a wide input voltage range. It is designed for a mains application focused on providing a cost-effective and space-saving solution.

The STEVAL-ISA081V1 SMPS generates 12 V nominal output voltage using primary regulation. This board is based on VIPer™26LD - a monolithic converter integrating a high voltage MOSFET and PWM controller in one package.

This document contains a fundamental technical description of the demonstration board (schematic diagram, PCB details, and bill of materials) as well as basic measurements (load regulation, efficiency, standby behavior, EMI and thermal behavior data).

The last section of this document contains short recommendations on how to set different output voltages in the range of 10 V - 18 V and how to improve efficiency up to 86%.

Specifications

Manufacturer STMicroelectronics
Category AC/DC and DC/DC Conversion
Sub-Category AC/DC SMPS - Multi Output
Eval Board Part Number 497-11124-ND
Eval Board Supplier STMicroelectronics
Eval Board Normally In Stock
AC Voltage 115 V
230 V
Universal (115 / 230V)
Outputs and Type 2 Isolated
Voltage Out: Highest Current First 12V, 3.3V
Current Out 1A, 100mA
Output Power 12 W
Efficiency @ Conditions >81%, 230V in, 12V @ 0.4 ~ 1 A
>81%, 120V in, 12V @ 0.3 ~ 1 A
No-load Input Power @ Voltage 120 mW @ 230 V
Features Current Limit (Adj. or Fixed)
Frequency Jitter for EMI
Light Load Mode
Short Circuit Protection
Soft Start
Thermal Protection
Under Voltage Protection, Brown-Out
Switching Frequency 60 kHz
Internal Switch Yes
Component Count + Extras 27 + 2
Voltage In 85 ~ 305 VAC
Application / Target Market DVD/Blu-ray Players
Power: Auxiliary Power Supply
RF: Metering
Set-Top Boxes
White Goods
Design Author STMicroelectronics
Main I.C. Base Part VIPer26LD
Date Created By Author 2010-11
Date Added To Library 2012-02

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