DRV8434A-Q1数据手册TI中文资料规格书

描述 Description

The DRV8434-Q1 is a stepper motor driver for automotive applications. The device is fully integrated with two N-channel power MOSFET H-bridge drivers, a microstepping indexer, and integrated current sensing. The DRV8434-Q1 is capable of driving up to 2.5A full-scale output current (dependent on PCB thermal design).

The DRV8434-Q1 uses an internal current sense architecture to eliminate the need for two external power sense resistors, saving PCB area and system cost. The device uses an internal PWM current regulation scheme with smart tune ripple control decay. Smart tune automatically adjusts for optimal current regulation, compensates for motor variation and aging effects and reduces audible noise from the motor.

A simple STEP/DIR interface allows an external controller to manage the direction and step rate of the stepper motor. The device can be configured in full-step to 1/256 microstepping. A low-power sleep mode is provided using a dedicated nSLEEP pin.

The DRV8434-Q1 features advanced stall detection algorithm configurable by two digital IO and one analog IO pins, and does not require an SPI interface to detect stall. By detecting motor stall, system designers can identify if the motor was obstructed and take action as needed which can improve efficiency, prevent damage and reduce audible noise. Other protection features include supply undervoltage, charge pump faults, overcurrent, short circuits, open load, and overtemperature. Fault conditions are indicated by the nFAULT pin.

特性 Features

AEC-Q100 Qualified for Automotive

Functional Safety-Capable

Documentation available to aid functional safety system design



PWM Microstepping Stepper Motor Driver

Simple STEP/DIR Interface

Up to 1/256 Microstepping Indexer



Integrated Current Sense Functionality

No Sense Resistors Required

±4% Full-Scale Current Accuracy



Smart tune ripple control decay

Stall Detection using GPIO pins

4.5 to 48V Operating Supply Voltage Range

Low RDS(ON): 330mΩ HS + LS at 24V, 25°C

High Current Capacity: 2.5A Full-Scale, 1.8A rms

Supports 1.8V, 3.3V, 5.0V Logic Inputs

Low-Current Sleep Mode (2 µA)

Spread spectrum clocking for low EMI

Small Package and Footprint

Protection Features

VM Undervoltage Lockout (UVLO)

Charge Pump Undervoltage (CPUV)

Overcurrent Protection (OCP)

Sensorless stall detection

Open Load Detection (OL)

Thermal Shutdown (OTSD)

Fault Condition Output (nFAULT)