Datasheet

13

Rev. 1.0, 2008-02-28

SPI Driver for Enhanced Relay Control

SPIDER - TLE7233G

Power Stages

6

Power Stages

The TLE7233G is a four channel low-side relay switch.

The power stages are made of N-channel vertical power MOSFET transistors.

6.1

Input Circuit

The TLE7233G has four input pins, that can be configured to be used for control of the output stages. The INn

parameter of the SPI provide the following operation modes:

•

channel is in off mode without diagnosis

(if all channels are programmed to this mode, the device goes into idle mode)

•

channel is switched according to signal level at input pin INx

•

channel is switched on

•

channel is switched off with active diagnosis

Figure 5 shows the input circuit of TLE7233G.

Figure 4

Input signal conditioning circuit on all input and limp home pins

IN

I

IN

InputStage.emf