For further information contact your local STMicroelectronics sales office.

February 2013

Doc ID 024124 Rev 1

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STEVAL-ISA122V1

Wide input-range, single-output 5 V / 11 W power supply

demonstration board based on the VIPer27

Data brief

Features

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Precision of output regulation: ±5%

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High frequency output voltage ripple

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60 °C

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RoHS compliant

Description

The STEVAL-ISA122V1 demonstration board

meets the specifications of a wide range of

auxiliary power supplies for applications including

LCD or plasma TVs and desktop computers,

where the power supply that converts the energy

from the mains often includes two modules.

One module is the main power supply which

provides most of the power, and is off when the

application is shut down or in standby mode.

The other is the auxiliary power supply, which

only provides energy to specific parts of the

equipment such as the USB ports, remote

receivers, or modems, but stays on when the

application is in standby mode.

It is optimized for very low standby consumption,

which allows it to satisfy the most stringent

energy-saving requirements.

The VIPer27 has a switching frequency of 115

kHz, which helps to reduce the transformer size.

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