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16 W triple output quasi resonant flyback converter for air
conditioning applications using VIPer35LD
Features
AC main input voltage range : 175 V
AC
to
275 V
AC
Triple output voltages: 12 V - 1 A (isolated),
15 V - 200 mA (non-isolated), 5 V - 200 mA
(non-isolated), continuous operation
High performance at low load conditions:
< 50 mW at no-load condition and < 1.5 W
input power at minimum operative output
power (0.91 W)
Efficiency at full load: > 81%
EMI: According to EN55022-Class-B, using
low cost input filter
RoHS compliant
Description
The STEVAL-ISA183V1 evaluation board
implements a 16 W triple output power supply
designed in quasi-resonant flyback topology,
specifically designed as an auxiliary PSU for air
conditioning systems.
The core of the application is the VIPER35LD
high voltage converter from the VIPerPlus
product family which integrates an 800 V rugged
power MOSFET with a quasi-resonant PWM
current-mode control.
The power supply provides an isolated 12 V / 1 A
output a two non-isolated outputs, 15 V / 200 mA
and 5 V / 200 mA respectively.
Other key features include high conversion
efficiency, the extremely low consumption at no-
load and at minimum operative output conditions
and excellent EMI performance using a low cost
input filter.
All of these features are concentrated in a small
PCB footprint and a minimal bill of materials.
