DRV8874-Q1开发板套件编程器的评估演示板及套件规格书PDF中文资料

DRV8874-Q1属于开发板套件编程器的评估演示板及套件。由德州仪器制造生产的DRV8874-Q1评估和演示板及套件该系列产品提供了一种方便的方法，在经过验证的实施环境中评估某些重点器件的性能或特性。评估方法通常有完善的文档说明，并且视乎具体情况由评估软件提供支持。产品通常由印刷电路板组成，板上已装有重点器件以及必要或有用的支持元器件，另外也可能包括其他组件，例如电缆或电源。对于数量特别多或类别独特的器件类别(如 ADC、DAC 和开关模式电源)，评估平台可组合为一个单独的产品系列。

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.