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TLE7233G Datasheet(PDF) 4 Page - Infineon Technologies AG |
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TLE7233G Datasheet(HTML) 4 Page - Infineon Technologies AG |
4 / 32 page SPI Driver for Enhanced Relay Control SPIDER - TLE7233G Overview Datasheet 4 Rev. 1.0, 2008-02-28 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 TLE7233G is a four channel low-side relay switch (1 Ω per channel) in PG-SSOP-24-5 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 TLE7233G is equipped with four input pins that can be individually routed to the output control of their corresponding channel and therefore offer complete flexibility in design and PCB layout. The input multiplexer is controlled via SPI. A limp home pin (LHI) provides a simple use of the input pins; this enables a direct connection between the input pins and their corresponding outputs. The limp home function works under V DDA in order to ensure functionality even with a missing digital supply. 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. |
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