DRV8818PWPRG4.B中文资料德州仪器数据手册PDF规格书

1 Features

• Pulse Width Modulation (PWM) Microstepping

Motor Driver

– Built-In Microstepping Indexer

– Up to 8 Microsteps/Step

– Step and Direction Control

– Programmable Mixed Decay, Blanking, and Off

Time

• Up to 2.5A Current Per Winding

• Low 0.37Ω (HS + LS) MOSFET RDS(ON) (25°C)

• 8V to 35V Operating Supply Voltage Range

• Pin to Pin Upgrade for DRV8811 With Lower

RDS(ON)

• Thermally-Enhanced Surface Mount Package

• Protection Features

– VM Undervoltage Lockout (UVLO)

– Overcurrent Protection (OCP)

– Thermal Shutdown (TSD)

2 Applications

• Printers

• Textile Machinery

• Positioning/Tracking

• Factory Automation

• Robotics

3 Description

The DRV8818 provides an integrated stepper motor

driver for printers, scanners, and other automated

equipment applications. The device has two H-bridge

drivers, as well as microstepping indexer logic to

control a stepper motor.

The output driver block for each consists of N-channel

power MOSFETs configured as full H-bridges to drive

the motor windings.

A simple STEP/DIRECTION interface allows easy

interfacing to controller circuits. The mode pins allow

for configuration of the motor in full-step, half-step,

quarter-step, or eighth-step modes. Decay mode and

PWM off time are programmable.

Internal shutdown functions are provided for over

current protection, short circuit protection, undervoltage

lockout and overtemperature.

The DRV8818 is packaged in a 28-pin HTSSOP

package with PowerPAD™.