Datasheet

SPI Driver for Enhanced Relay Control
SPIDER - TLE7231G
Overview
Datasheet 4 Rev. 1.1, 2011-04-12
Protection Functions
• Short circuit
• Over load
• Over temperature
• Electrostatic discharge (ESD)
Application
• All types of resistive, inductive and capacitive loads
• Especially designed for driving relays in automotive applications
Description
The TLE7231G is a four channel low-side relay switch (1 Ω per channel) in PG-DSO-14-1 package providing
embedded protective functions. It is especially designed as a relay driver for automotive applications. The 8 bit
serial peripheral interface (SPI) is provided for control and diagnostics of the device and the loads. The SPI
interface provides daisy-chain capability.
The TLE7231G is equipped with an input pin that can be individually routed to the output control of each channel
and therefore offer complete flexibility in design and PCB layout. The input multiplexer is controlled via SPI.
The device provides many diagnostics of the load enabling both open load and short circuit detection. The SPI
diagnostic bits indicate any eventual latched fault condition.
Each output stage is protected against short circuit. In case of over load, the affected channel switches off.
Temperature sensors are available for each channel in order to protect the device against over temperature.
The power transistors are made of N-channel vertical power MOSFETs. The inputs CMOS compatible referenced
to Ground. The device is monolithically integrated in Smart Power Technology.