SPI Driver for Enhanced Relay Control

TLE7239SL

Application Information

Data Sheet

35

Rev. 1.0, 2010-02-18

11

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 14

Application Diagram

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

The circuit above shows a example of using this device in a automotive target application.

D1 is optional for loss of battery or loss of ground if no other circuit on this battery feed can limit the voltage to the

max. rating of the device (-40 V) .

C2 is for EMC and to stabilize the digital driver, recommended value is 47nF.

There are no resistors to the µC needed due to the internal reverse polarity protection.

SO

SCLK

SI

CS

GND

VDD

Application _7GS.emf

OUT0

OUT1

OUT6

OUT7

Vbat

Lowside

Loads

SPI uC

PWM

C2

VBB

Highside

Loads

OUT2

OUT3

D4

S4

D5

S5

PWM

PWM

IN2

IN1

IN3

SUB

Cooling area

D1