Issue 1 – October, 2011

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© Diodes Incorporated, 2011

ZXGD3104EV2 USER GUIDE

Introduction

The purpose of this board is to demonstrate the driving of a synchronous MOSFET as a Schottky

replacement in isolated power supplies. The circuit is suitable for use in AC/DC Flyback converters.

End applications include external power adaptors for laptops greater than 90W, and LED monitors.

When used to drive a low on-resistance MOSFET, the board increases power efficiency whilst still

maintaining simplicity of design.

Performance

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Recommended supply voltage VIN: 19V

•

Gate voltage clamped to 12V maximum

•

Ideal for Quasi Resonant operation

•

Switching frequency up to 250KHz

Ordering Information

Order Number

ZXGD3104EV2

Caution: Do not connect the evaluation board to a

supply voltage, VIN, greater than 25V!

Figure 1. Evaluation board layout