DRV81242-Q1中文资料汽车级、40V、2 通道可配置、4 通道高侧、2 通道低侧驱动器数据手册TI规格书

描述 Description

The DRV81242-Q1 is an 8-channel low and high-side driver with protection and diagnostics. The device is designed to control relays, LEDs, lamps and motors.

A serial peripheral interface (SPI) with daisy chain is utilized for control and diagnosis of the loads and the device. Two input pins with mapping functionality allow direct control of the outputs. The device supports Limp Home for fail-safe activation. Integrated PWM generators enable driving LEDs, and bulb inrush mode enables driving loads with large capacitance. Clamp circuits on each output dissipates the energy during turning OFF inductive loads.

The device supports various protection features such as undervoltage, overvoltage, short circuit and open load detection. A high level of integration with embedded protection and diagnostic features make the DRV81242-Q1 an excellent choice for automotive body and powertrain applications.

特性 Features

AEC-Q100 qualified for automotive applications

Temperature grade 1: –40°C to +125°C, TA



Functional Safety-Capable

Documentation to aid functional safety design



3V to 40V Analog supply voltage

Cranking capability down to 3V

Supports LV124 automotive standard



3V to 5.5V Digital supply voltage

Compatible with 3.3V and 5V microcontrollers



42V minimum drain to source clamping voltage

-18V maximum source to ground clamping voltage

Independent supply (VM_HS) for high-side channels

RDS(ON): 700mΩ typical at 12V, 25 °C

Current: 330mA per output at 85 °C, with all channels ON

2 parallel inputs with mapping functionality

Fail-safe activation in Limp Home mode

Using nSLEEP and IN pins



Two independent internal PWM generators

Bulb Inrush Mode (BIM) to drive lamps

For 2W/5W lamps and other capacitive loads



Low-current sleep mode, < 3µA for TJ ≤ 85 °C

16-bit SPI for control and diagnosis

Daisy Chain capability

Compatible with 8-bit SPI devices



Supports various protection features

Reverse battery protection

Short circuit to ground and battery protection

Stable behavior at under voltage conditions

Over Current latch OFF

Overtemperature warning

Thermal shutdown latch OFF

Overvoltage protection

Loss of battery and loss of ground protection

Electrostatic discharge (ESD) protection



Supports several diagnostic features

Diagnostic information via SPI register

Over Load detection at ON state

Open Load detection in ON and OFF state

Input and output status monitor