Datasheet

25

Rev. 1.0, 2009-09-30

SPI Driver for Enhanced Relay Control

SPIDER - TLE7243SL

Application Information

9

Application Information

Note: The following information is given as a hint for the implementation of the device only and shall not be

regarded as a description or warranty of a certain functionality, condition or quality of the device.

Figure 13 shows a simplified application circuit. VDD and VDDA need to be externally reverse polarity protected.

Figure 13

Application Diagram

Note: This is a very simplified example of an application circuit. The function must be verified in the real application.

For further information you may contact http://www.infineon.com/spider

GND

SPI

GND

GND

VCC

+5V

VDD

VDD

100nF

SO

SCLK

SI

CS

IN2

IN1

TLE7243SL.emf

SPI

OUT1

OUT2

OUT3

OUT4

OUT8

low-side

gate control

IN3

LHI

Limp Home Signal

(eg WD out of SBC TLE 8264 G Hermes)

IN4

OUT5

OUT6

OUT7

VDDA

µC

XC2000

RST

KL15 Relay

KL50 Relay

Wiper Relay

Horn Relay

GPIO

Limp Home Circuit

Possibility to control OUT 1-

4 via Inputs IN1-4 during

malfunction of µC