STEVAL-ISA012V1 Datasheet, PDF (1/4 Pages) STMicroelectronics – 3 phase power supply with VIPer and Power MOSFETs

STEVAL-ISA012V1
Features
3 phase power supply with VIPer and Power MOSFETs
Data Brief
■ Minimum AC input voltage = 90 V_AC
■ Maximum AC input voltage = 450 V_AC
■ Time of hold up capability > 50 ms
■ Mean input power < 6 W (in compliance with
IEC62053-21)
■ Input connections allowed:
– 1-phase with neutral
– 2-phase without neutral
– 3-phase with neutral
■ V_OUT1 = 5 V, I_OUT1 = 10 mA
■ V_OUT2 = 3.3 V, I_OUT2 = 100 mA
■ Maximum precision error = 3%
■ Maximum ripple voltage = 50 mV
■ Line regulation = +/- 1%
■ Load regulation = +/- 1%
■ Output power (peak) = 550 mW
STEVAL-ISA012V1
Typical end applications for this solution can be
found in the industrial market in the range below 5
W, such as three-phase and single-phase power
meters, industrial bias power supplies and
auxiliary SMPS for high voltage street lighting,
where the input voltage can range from 90 V_AC to
450 V_AC and 1000 V Power MOSFETs are
currently used.
Description
This reference design represents a cost effective
solution for low power high voltage power
supplies. It has been developed to cover
applications requiring an ultra-wide input voltage
range (between 90 and 450 V_AC), typical of three-
phase applications. This requires the use of very
high voltage components, which increases cost,
size, weight and the overall complexity of the
power supply. The circuit includes a switching
transistor connected between the input rectifier
and the DC bulk capacitor (STMicroelectronics
patent). The series switch limits the DC input
voltage of the power converter by means of a
driving circuit; thus the SMPS primary transistor
can be selected as a standard part as well as a
smart power primary IC.
November 2007
Rev 1
For further information contact your local STMicroelectronics sales office.
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