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
Outputs and Type	2 Isolated
Voltage Out: Highest Current First	12, 3.3 V
Current Out	1 A, 100 mA
Output Power	12 W
Efficiency @ Conditions	>81%, 230V in, 12V @ 0.4 ~ 1 A Out >81%, 120V in, 12V @ 0.3 ~ 1 A Out
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	Auxiliary Power Supply DVD Players Metering Set-Top Boxes White Goods
Main I.C. Base Part	Viper26LD
Date Created By Author	2010-11
Date Added To Library	2019-04