April 2016

DocID029273 Rev 1

1/5

For further information contact your local STMicroelectronics sales

office

www.st.com

STEVAL-ISA175V1

9.4 W, 15 V-5 V-3.3 V, three output isolated flyback converter for

smart meter and power line systems using the VIPER26HD

Data brief

Features



A peak), 3.3 V @ 200 mA and 5 V @ 100

mA



Extended AC mains input voltage range: 90



Meets STCOMET smart meter and power

line communication system specs



EMC with EN55022, EN61000, EN61000-4-

4, EN61000-4-5, EN61000-4-6



RoHS compliant

Description

The STEVAL-ISA175V1 evaluation board

implements a three output isolated flyback

specifically designed to supply the STCOMET

smart meter and powerline communication

system.

The board is developed using the VIPER26HD

offline high-voltage converter by

STMicroelectronics. The device features an

800 V avalanche-rugged power section, PWM

operation at 115 kHz with frequency jittering for

lower EMI, current limiting with adjustable set

point, on-board soft-start, safe auto-restart after a

fault condition and low standby power.

(700 mA peak) to the power line modem (PLM)

and the analog circuitry, a post-regulated 5 V @

100 mA and a 3.3 V @ 200 mA supply through a

dedicated DC-DC converter connected on the 15

V rail for digital circuitry and other low voltage

parts.

The power supply is designed to operate across

range to also be used with a phase-to-phase

connection in a three-phase network.

The board can be used in a stand-alone

configuration or with the dedicated STCOMET

development kit and the PCB layout is

specifically designed to fit inside a real meter.