TLE7232G Datasheet, PDF (5/36 Pages) Infineon Technologies AG – SPI Driver for Enhanced Relay Control

SPI Driver for Enhanced Relay Control
SPIDER - TLE 7232G
Overview
1
Overview
The SPIDER - TLE 7232G is an eight channel low-side relay switch (1.2 Ω per channel)
in P-DSO-24-3 package providing embedded protective functions. The 16 bit serial
peripheral interface (SPI) is utilized for control and diagnosis of the device and the loads.
The SPI interface provides daisy-chain capability in order to assemble multiple devices
in one SPI chain by using the same number of micro-controller pins.
The SPIDER - TLE 7232G is equipped with one input pin that can be individually routed
to the output control of each channel thus offering complete flexibility in design and PCB-
layout. The input mapping as well as the boolean operation between input signal an
output control signal is configured via SPI.
The device provides full diagnosis of the load, which is open load, short to GND as well
as short circuit to V_bat detection and over load / over temperature indication. The SPI
diagnosis flags indicate latched fault conditions that may have occurred.
Each output stage is protected against short circuit. In case of over load, the current of
the affected channel is limited. There is a temperature sensor available for each channel
to protect the device in case of over temperature. The shut down behavior in case of over
load or over temperature can be configured via SPI for each channel individually.
1.1
Block Diagram
VDD
IN
RST
CS
SCLK
SI
VSO
SO
input map
boolean operation
output control
reset / stand-by
SPI
hardware
configuration
output monitor
diagnosis register
control,
diagnostic
and
protective
functions
temperature
sensor
short circuit
detection
gate
control
open load
detection
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
Figure 1 Block Diagram
Data Sheet
5
GND
Overview .emf
V1.0, 2005-09-30