DRV8411 datasheet(11/53 Pages) TI

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9 Detailed Description

9.1 Overview

The DRV8411A device is a dual H-bridge motor driver for driving two brushed DC motors or one stepper motor

from a 1.65-V to 11-V supply rail. The integrated current regulation feature limits motor current to a predefined

maximum based on the VREF and xIPROPI settings. The xIPROPI signal can provide current feedback to a

microcontroller during both the drive and brake/slow-decay states of the H-bridge.

Two logic inputs control each H-bridge, which consists of four N-channel MOSFETs that have a typical RDS(ON)

of 400 mΩ (including one high-side and one low-side FET). A single power input, VM, serves as both device

power and the motor winding bias voltage. The integrated charge pump of the device boosts VM internally and

fully enhances the high-side FETs. Motor speed can be controlled with pulse-width modulation, at frequencies

between 0 to 100 kHz. The device enters a low-power sleep mode by bringing all four inputs low.

A variety of integrated protection features protect the device in the case of a system fault. These include

undervoltage lockout (UVLO), overcurrent protection (OCP), and overtemperature shutdown (TSD).

9.2 Functional Block Diagram

Power

Logic

Charge

Pump

AOUT1

AIN1

AIN2

Gate

Drive

AOUT2

Gate

Drive

Core Logic

Control

Inputs

Overcurrent

Undervoltage

Thermal

0.1 µF

bulk

VCP

OCP

nFAULT

BOUT1

Gate

Drive

BOUT2

Gate

Drive

VCP

OCP

BIN1

BIN2

VREF

AIPROPI

Current

Sense

AISEN1

AISEN2

IPROPI

Clamp

BIPROPI

Current

Sense

BISEN1

BISEN2

IPROPI

Clamp

GND

VMCU

AISEN1

AISEN2

PGNDA

BISEN1

PGNDB

BISEN2

From

Microcontroller

ADC

Microcontroller

Step

Motor

BDC

www.ti.com

DRV8411A

SLVSGI9A – OCTOBER 2022 – REVISED JULY 2023

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