1 Features

• AEC-Q100 qualified for automotive applications

– Temperature grade 1: –40°C to 125°C

– Device HBM ESD classification level 2

– Device CDM ESD classification level C5

– Withstands 36V load dump

• Dual-channel SPI controlled smart high-side switch

with integrated nFETs.

• Integrated wire-harness protection without MCU

involvement and a SPI programmable fuse curve

– Protection against persistent overload condition

• Improve system level reliability through SPI

programmable adjustable overcurrent protection

• SPI configurable capacitive charging mode to drive

a wide range of capacitive input ECUs load current

needs.

• Low quiescent current, low power ON-state to

supply always-ON loads with automatic wake on

load current increase with wake signal to MCU

• Robust integrated output protection:

– Integrated thermal protection

– Protection against short-to-ground

– Protection against reverse battery events

including automatic switch on of FET with

reverse supply voltage

– Automatic shut off on loss of battery and

ground

– Integrated output clamp to demagnetize

inductive loads

• Digital sense output via SPI can be configured to

measure:

– Load current accurately with integrated ADC

– Output or supply voltage, FET temperature

• Provides full fault diagnostics through SPI interface

and indication through FLT pin

– Detection of open load and short-to-battery

2 Applications

• Automotive zone ECU

• Power distribution modules

• Body control modules

3 Description

The TPS2HCS08-Q1 device is a dual channel,

smart high-side switch controlled through a serial

peripheral interface (SPI) and is intended for power

distribution and actuator drive applications. The

device integrates robust protection to ensure output

wire and load protection against short circuit or

overload conditions. The device features overcurrent

protection configurable via SPI with sufficient flexibility

to support loads that require large inrush currents

and provide improved protection. The device also

integrates a programmable fuse profile (current

versus time) that turns off the switch under persistent

overload condition. The two features together allow

optimization of the wire harness for any load profile

with full protection.

The device supports a SPI-configurable capacitive

charging mode for ECU loads in power distribution

switch applications. The device also includes two low

power mode (LPM) states, an auto entry mode or

a manual entry mode, that enables the device to

provide current to the load ECU while only consuming

about 10–20μA of current.

The TPS2HCS08-Q1 device also provides a high

accuracy digital current sense over SPI that allows for

improved load diagnostics. By reporting load current

and the channel output voltage and output FET

temperature to a system MCU, the device enables

diagnosis of switch and load failures.

The TPS2HCS08-Q1 is available in a HTSSOP

package which allows for reduced PCB footprint.