1

Introduction

TD350 is an advanced IGBT/MOSFET driver with integrated control and protection functions. Principles

of operation and application examples for the TD350 are described extensively in application note

AN1944. The present application note concerns the characteristics and use of the demoboard available

for testing the TD350.

2

Printed circuit board presentation

The demoboard is a 26x35mm double-sided PCB with the TD350 and its peripheral components

mounted in a typical configuration (pictured in Figure 2). To aid in the understanding and easy

modification of the board, the PCB top-side and bottom-side layers, as well as the silk-screen previews

are shown in Figure 3.

The demoboard electrical schematic is presented on Figure 4, and the associated bill of material can be

found on Table 1 on page 5.

Let’s study step by step the demoboard original configuration, and the way it can be modified to be

adapted to the application.

Figure 1: TD350 pinout

7

2

4

5

1

3

FAULT

6

IN

VREF

NC

COFF

LVOFF

NC

13

12

9

11

10

8

14

VH

OUT

CLAMP

GND

VL

OUTL

DESAT

Bevelled edge

indicates pin 1

location

AN2002

APPLICATION NOTE

Using the Demoboard for the TD350 Advanced IGBT Driver

Revision A

1/8

July 2004