1 Features

• Qualified for automotive applications

• AEC-Q100 qualified with the following results:

– Device temperature grade 1: –40°C to 125°C

ambient operating temperature range

• Functional safety capable

– Documentation available to aid functional safety

system design

• Dual-channel 85mΩ smart high-side switch with

full diagnostics

• Wide operating voltage: 6V to 58V

• Ultra-low standby current, < 2μA per channel

• High-accuracy current sense: 50mA

• Selectable current limit levels with external resistor

• Protection features:

– Short-to-GND protection by current limit

– Absolute and relative thermal shutdown

– Inductive Load negative voltage clamp with

optimized slew rate

– Loss-of-ground, loss-of-battery, and reverse

battery protection

• Diagnostics features:

– Overcurrent and short-to-ground detection

– Open-load and short-to-battery detection

– Accurate current sense

• 3.5mm × 3mm small form factor 12-pin QFN

package

2 Applications

• Body control module

• Zone control module

• ADAS modules

• Automotive lighting

3 Description

The TPS4H82H85-Q1 device is fully protected dualchannel

smart high-side switch with two integrated

85mΩ NMOS power FETs, intended for 24V and

48V automotive systems. The low RON minimizes the

device power dissipation when driving a wide range

of output load current up to 2.2A when both channels

are enabled or 3A when only one channel is enabled.

Protection and diagnostic features include accurate

current sense, selectable current limit levels, OFFstate

open-load, short-to-battery detection, output

clamp, and thermal shutdown.

The device provides an accurate load current

sense that allows for improved load diagnostics

such as overload and open-load detection, which

enables better predictive maintenance, without further

calibration. The device also implements a selectable

current limiting circuit that improves the reliability

of the system by reducing inrush current when

driving large capacitive loads and minimizing overload

current. The TPS4H82H85-Q1 device can be used

as a high-side power switch for a wide variety of

resistive, inductive, and capacitive loads, including

low-wattage bulbs, LEDs, relays, solenoids, and

heaters.