Data Brief

For further information contact your local STMicroelectronics sales office.

November 2007

Rev 1

1/4

4

STEVAL-ISA012V1

3 phase power supply with VIPer and Power MOSFETs

Features

IEC62053-21)

– 1-phase with neutral

– 2-phase without neutral

– 3-phase with neutral

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

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.

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,

currently used.

STEVAL-ISA012V1

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