DRV81242-Q1中文资料德州仪器数据手册PDF规格书

1 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

2 Applications

• Zone Control Module (ZCM)

• Automotive Body Control Module (BCM)

• Automotive Lighting

• Gasoline and Diesel Engine

• Vehicle Control Unit (VCU)

• Programmable Logic Controller (PLC)

3 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.