STEVAL-ISA029V1: 12V @ 1A, 3.3V @ 100mA, -24V @ 40mA

Summary

The STEVAL-ISA029V1 evaluation board is an isolated triple-output flyback converter, suitable for wide-range input voltage operation. The converter is based on the smart power VIPer53-E, which integrates, in the same package, an enhanced current-mode PWM controller with a high-voltage MDmesh™ Power MOSFET.

The switching frequency is set to 60 kHz by means of an external RC network connected to a dedicated pin on the IC. The closed loop regulation is performed on the 12 V output using an optocoupler, which drives the COMP pin of the VIPer. The 3.3 V output is post regulated using a non-integrated low drop linear voltage regulator to achieve the required accuracy. The negative 24 V output is achieved by means of a discrete linear voltage regulator, made up of a Zener diode, a resistor and a PNP transistor.

Specifications

Manufacturer	STMicroelectronics
Category	AC/DC and DC/DC Conversion
Sub-Category	AC/DC SMPS - Multi Output
Eval Board Part Number	497-6458-ND
Eval Board Supplier	STMicroelectronics
Eval Board	Board not Stocked
AC Voltage	115 V 230 V Universal (115 / 230V)
Outputs and Type	3 Isolated
Voltage Out: Highest Current First	12V, 3.3V, -24V
Current Out	1A, 100mA, 40mA
Output Power	13 W
Efficiency @ Conditions	- Not Given
No-load Input Power @ Voltage	- Not Given
Features	Current Limit (Adj. or Fixed) Short Circuit Protection Thermal Protection Under Voltage Protection, Brown-Out
Switching Frequency	60 kHz
Internal Switch	Yes
Component Count + Extras	50 + 2
Voltage In	85 ~ 300 VAC
Application / Target Market	DVD/Blu-ray Players Set-Top Boxes
Design Author	STMicroelectronics
Main I.C. Base Part	VIPer53
Date Created By Author
Date Added To Library	2017-05