DRV8876RGTR.A中文资料德州仪器数据手册PDF规格书

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 DRV887x family of devices are flexible motor

drivers for a wide variety of applications. The devices

integrate an N-channel H-bridge, charge pump

regulator, current sensing and regulation, current

proportional output, and protection circuitry. The

charge pump improves efficiency by allowing for both

high-side and low-side N-channels MOSFETs and

100% duty cycle support. The family of devices come

in pin-to-pin, scalable RDS(on) options to support

different loads with minimal design changes.

Integrated current sensing allows for the driver to

regulate the motor current during start up and high

load events. A current limit can be set with an

adjustable external voltage reference. Additionally,

the devices provide an output current proportional to

the motor load current. This can be used to detect

motor stall or change in load conditions. The

integrated current sensing uses an internal current

mirror architecture, removing the need for a large

power shunt resistor, saving board area and reducing

system cost.

A low-power sleep mode is provided to achieve ultralow

quiescent current draw by shutting down most of

the internal circuitry. Internal protection features are

provided for supply undervoltage lockout (UVLO),

charge pump undervoltage (CPUV), output

overcurrent (OCP), and device overtemperature

(TSD). Fault conditions are indicated on nFAULT.