Data Brief

For further information contact your local STMicroelectronics sales office.

February 2009

Rev 1

1/4

4

STEVAL-ISA036V1

5 W wide range SMPS demonstration board for metering and motor

Features

/ 0.6 A

Vout3=15 V / 66 mA

> 65%

Description

This demonstration board implements a universal

input power supply design for metering and motor

drives applications. It has three outputs: two 15 V

outputs, one of which is isolated and the other has

a primary side ground. There is also a third 5 V

output, which is often used to supply the

microcontroller.

The design is based on the L6565 PWM driver

and the STC04IE170HP, as the main switch.

The design method, however, can also be applied

to an SMPS for other applications working on a

tri-phase mains, and can easily be upgraded for

higher output power.

To achieve very high efficiency, despite the wide

input voltage range, an active start-up network

has been mounted on the board.

For more information regarding the design of an

auxiliary power supply using ESBT

®

in flyback

quasi-resonant (QR) topology with the L6565,

refer to application notes AN2254 and AN2528.

For base driving network design, refer to AN2454.

STEVAL-ISA036V1

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