February 2011

Doc ID 14923 Rev 1

1/25

AN2813

Application note

TDE1708DFT in IO-Link applications

1

Introduction

This application note investigates the possibility of using a TDE1708DFT switch for the

physical layer transmitter realization of 3-wire IO-Link sensors.

The TDE1708DFT is an integrated power switch especially dedicated to proximity detectors.

It can deliver up to 250 mA, enables high-side and low-side configurations and includes

a number of protections.

configurations were tested (see Figure 1):

Figure 1.

P-switching slave drive and p-switching with n-switching slave drive

represents the average master current sink value specified for a 3-wire system. The master

maximum parasitic capacitance of the system.

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