TLE7234EM Datasheet, PDF (34/36 Pages) Infineon Technologies AG – SPI Driver for Enhanced Relay Control

SPI Driver for Enhanced Relay Control
TLE7234EM
Application Information
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 shows a simplified application circuit. Vdd need to be externally reverse polarity protected.
Vbat
VDD
PWM
PWM
LHO
SPI uC
VDD
VBB
C2
IN1
IN2
LHI
CS
SCLK
SI
SO
GND
OUT0
OUT1
OUT2
OUT3
D4
S4
D5
S5
OUT6
OUT7
Lowside
Loads
D1
Highside
Loads
Application _LG.emf
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.
For further information you may contact http://www.infineon.com/spider
Data Sheet
35
Rev. 1.0, 2010-02-18