Infineon TLE7233EM

The TLE7233EM is a four channel low-side relay switch (high impedance per channel) in PG-SSOP-24-4 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 TLE7233EM 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 also with VDDA only in order to ensure functionality even without the 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 are CMOS compatible and are referenced to Ground. The device is monolithically integrated in Smart Power Technology.

• 4 channel low-side relay driver
• 8-bit SPI for diagnostics and control
• SPI providing Daisy Chain Capability
• Limp Home functionality
• Very wide range for digital Supply Voltage
• Four input pins provide flexible and straightforward PWM operation
• Stable behavior at Under Voltage
• Green Product (RoHS compliant)
• AEC Qualified

• All types of resistive, inductive and capacitive loads
• Especially designed for driving relays in automotive applications