For further information contact your local STMicroelectronics sales
office
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
Features
Triple output voltage: 15 V @ 0.55 A
rms
(0.7
A peak), 3.3 V @ 200 mA and 5 V @ 100
mA
Extended AC mains input voltage range: 90
V
AC
to 440 V
AC
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.
The power supply provides 15 V @ 550 mA
rms
(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
an extended 90 to 440 V
AC
mains input voltage
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.
