The TPS2HCS08-Q1 device is a dual-channel smart high-side switch intended for use with 12V automotive batteries. The TPS2HCS08-Q1 device integrates SPI control and configuration as well digital readout with an ADC of key device and load diagnostics. The device incorporates all of the specific features needed for a power distribution switch as well as the traditional protective and diganostic functions seen in high side switches for actuator drive applications.

Diagnostics features include a digital current, output voltage and FET temperature sense output that can be read over the SPI serial interface. The high-accuracy load current sense allows for diagnostics of complex loads. The output voltage sense and FET temperature sense fearures in the device enables diagnosis of the switch and load failures.

This device includes protection through thermal shutdown, overcurrent protection, transient withstand, and reverse battery operation. In addition, the device also includes an SPI-configurable wire-harness protection function through a defined fuse or tme-current curve. The protection works in conjunction with an immediate switch-off overcurrent protection with an SPI-configurable threshold to fully protect against overload and short circuit faults.

The TPS2HCS08-Q1device also integrates a low quiescent current mode where the device can provide currents in the 100s of mA range while consuming only micro-amps of current. The device automatically switches to the high-current mode on an increase in load current and provide a wake signal to the MCU. Further, the device includes a capacitive charging mode that reduces the peak current load on the supply. Together, the two features support power distribution switch to off-board ECU applications.

For more details on the diagnosis, power distribution and protection features, refer to the Feature Description and Application Information sections of the document.

The TPS2HCS08-Q1 is one device in a family of TI high side switches. For each device, the part number indicates elements of the device behavior. Figure 8-1 gives an example of the device nomenclature.

Figure 8-1 Naming Convention