DRV8874集成电路（IC）的电机驱动器控制器规格书PDF中文资料

DRV8874属于集成电路（IC）的电机驱动器控制器。由德州仪器制造生产的DRV8874电机驱动器，控制器产品属于电机驱动器和控制器电源管理集成电路 (PMIC) 系列，可用于控制或操作从某电源施加到电机或相关机电执行器的电源。所实现的具体功能和特性集根据预期负载和预期应用的特性有很大差异，范围从用于有刷电机的简单开环速度控制到基于步进电机的高级闭环运动控制。

1 Features

1• N-channel H-bridge motor driver

– Drives one bidirectional brushed DC motor

– Two unidirectional brushed DC motors

– Other resistive and inductive loads

• 4.5-V to 37-V operating supply voltage range

• Pin to pin RDS(on) variants

– DRV8874: 200-mΩ (High-Side + Low-Side)

– DRV8876: 700-mΩ (High-Side + Low-Side)

• High output current capability

– DRV8874: 6-A Peak

– DRV8876: 3.5-A Peak

• Integrated current sensing and regulation

• Proportional current output (IPROPI)

• Selectable current regulation (IMODE)

– Cycle-by-cycle or fixed off time

• Selectable input control modes (PMODE)

– PH/EN and PWM H-bridge control modes

– Independent half-bridge control mode

• Supports 1.8-V, 3.3-V, and 5-V logic inputs

• Ultra low-power sleep mode

– <1-μA @ VVM = 24-V, TJ = 25°C

• Spread spectrum clocking for low electromagnetic

interference (EMI)

• Integrated protection features

– Undervoltage lockout (UVLO)

– Charge pump undervoltage (CPUV)

– Overcurrent protection (OCP)

– Automatic retry or outputs latched off

(IMODE)

– Thermal shutdown (TSD)

– Automatic fault recovery

– Fault indicator pin (nFAULT)

2 Applications

• Brushed DC motors

• Major and small home appliances

• Vacuum, humanoid, and toy robotics

• Printers and scanners

• Smart meters

• ATMs, currency counters, and EPOS

• Servo motors and actuators

3 Description

The DRV8874 is an integrated motor driver with Nchannel

H-bridge, charge pump, current sensing and

proportional output, current regulation, and protection

circuitry. The charge pump improves efficiency by

supporting N-channel MOSFET half bridges and

100% duty cycle driving. The family of devices come

in pin-to-pin RDS(on) variants to support different loads

with minimal design changes.

An internal current mirror architecture on the IPROPI

pin implements current sensing and regulation. This

eliminates the need for a large power shunt resistor,

saving board area and reducing system cost. The

IPROPI current-sense output allows a microcontroller

to detect motor stall or changes in load conditions.

Using the external voltage reference pin, VREF,

these devices can regulate the motor current during

start-up and high-load events without interaction from

a microcontroller.

A low-power sleep mode achieves ultra-low quiescent

current draw by shutting down most of the internal

circuitry. Internal protection features include supply

undervoltage lockout, charge pump undervoltage,

output overcurrent, and device overtemperature.

Fault conditions are indicated on nFAULT.

View our full portfolio of brushed motor drivers on

ti.com.