Data Brief
For further information contact your local STMicroelectronics sales office
Rev 1
February 2006 1/5
5
STEVAL-ISA002V1
6W Single Output Supply using VIPer12A
Features
Q Switch mode General Purpose Power Supply
Q Input: 85 to 264 VAC @ 50/60 Hz
Q Output: 12V @ 0.5A
Q Output power (peak): 6W
Q Burst Mode Operation in Standby for Blue
Angel operation
Q Switching Frequency 60 kHz
Q 75% Efficiency
Q Auxiliary Undervoltage Lockout with Hysteresis
Q Output Short Circuit Protection
Q Thermal Shutdown Protection
Q Meets EN55022 Class B EMI specification
Applications
This board is an off-line wide range single output
general-purpose power supply capable of
delivering up to 6W of total output power. In low
load condition, it operates in the automatic burst
mode while in an overvoltage condition it will
operate in hiccup mode.
Other output voltages can easily be achieved by
changing the transformer and a few components
on the board, as shown in the application note.
Transformers are readily available for the
following configurations:
Q 5V @ 1.2A
Q 12V @ 0.5A
Q 15V @ 0.4A
Q 24V @ 0.25A.
Blue angels
When working in standby, the reference board
consumes less than 1W total power consumption
and therefore, meets the “Blue Angel” Norm. This
unit operates in burst mode when the output load
is reduced to zero and normal operation will
resume automatically when the power gets back
to a level higher than the standby power. The
output voltage remains regulated even when the
board operates in burst mode. The total power
consumption measured at 115Vac input with zero
load at output is approximately 168mW, while at
230Vac input this value is about 248mW. At
120Vac input, a minimum load of 52mA is needed
to keep the input power consumption at less than
1W.
STEVAL-ISA002V1
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