Texas Instruments DRV8833

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PWM

nSLEEP

nFAULT

2.7 to 10.8 V

Controller

+ t

DRV8833

Stepper or

Brushed DC

Motor Driver

1.5 A

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DRV8833

SLVSAR1E –JANUARY 2011–REVISED JULY 2015

DRV8833 Dual H-Bridge Motor Driver

1 Features 3 Description

The DRV8833 device provides a dual bridge motor

• Dual-H-Bridge Current-Control Motor Driver

driver solution for toys, printers, and other

– Can Drive Two DC Motors or One Stepper

mechatronic applications.

Motor

The device has two H-bridge drivers, and can drive

– Low MOSFET ON-Resistance: HS + LS 360

two DC brush motors, a bipolar stepper motor,

mΩ

solenoids, or other inductive loads.

• Output Current (at V

= 5 V, 25°C)

The output driver block of each H-bridge consists of

– 1.5-A RMS, 2-A Peak per H-Bridge in PWP

N-channel power MOSFETs configured as an H-

and RTY Package Options

bridge to drive the motor windings. Each H-bridge

– 500-mA RMS, 2-A Peak per H-Bridge in PW includes circuitry to regulate or limit the winding

current.

Package Option

• Outputs can be in Parallel for

Internal shutdown functions with a fault output pin are

provided for overcurrent protection, short-circuit

– 3-A RMS, 4-A Peak (PWP and RTY)

protection, undervoltage lockout, and

– 1-A RMS, 4-A Peak (PW)

overtemperature. A low-power sleep mode is also

• Wide Power Supply Voltage Range:

provided.

2.7 to 10.8 V

The DRV8833 is packaged in a 16-pin WQFN

• PWM Winding Current Regulation and Current

package with PowerPAD™ (Eco-friendly: RoHS & no

Limiting

Sb/Br).

• Thermally Enhanced Surface-Mount Packages

Device Information

(1)

2 Applications

PART NUMBER PACKAGE BODY SIZE (NOM)

TSSOP (16) 5.00 mm × 4.40 mm

• Battery-Powered Toys

DRV8833 HTSSOP (16) 5.00 mm × 4.40 mm

• POS Printers

WQFN (16) 4.00 mm × 4.00 mm

• Video Security Cameras

(1) For all available packages, see the orderable addendum at

• Office Automation Machines

the end of the data sheet.

• Gaming Machines

• Robotics

Simplified Schematic

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

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The DRV8833 is a dual H-bridge motor driver designed to control two DC motors or one stepper motor. It integrates two NMOS H-bridges and current regulation circuitry, capable of providing an output current up to 1.5-A RMS. This device is suitable for a wide range of applications including battery-powered toys, POS printers, video security cameras, office automation machines, gaming machines, and robotics.

Function Description

The DRV8833 operates as a dual H-bridge motor driver, enabling the control of two DC motors or a single stepper motor. Each H-bridge consists of four N-channel MOSFETs configured to drive the motor windings. The device incorporates internal shutdown functions for overcurrent protection, short-circuit protection, undervoltage lockout, and overtemperature. A low-power sleep mode is also provided for energy efficiency.

The device features current regulation, which can be configured for various current levels. It supports both forward and reverse drive, as well as fast and slow decay modes for current regulation. The PWM input allows for precise control of the motor speed and direction. The DRV8833 can be powered from a wide supply voltage range of 2.7 V to 10.8 V.

Important Technical Specifications

Supply Voltage Range: 2.7 V to 10.8 V
Output Current: Up to 1.5-A RMS (2-A Peak) per H-bridge in PWP and RTY packages; up to 500-mA RMS (2-A Peak) per H-bridge in PW package.
Low MOSFET ON-Resistance: HS + LS 360 mΩ (typical)
PWM Frequency: 50 kHz (internal)
Operating Junction Temperature: -40 °C to 150 °C
ESD Ratings:
- Human body model (HBM): ±4000 V
- Charged device model (CDM): ±1500 V
Thermal Shutdown (TSD): Protects the device from damage due to excessive temperature.
Undervoltage Lockout (UVLO): Prevents operation when the supply voltage is too low.
Overcurrent Protection (OCP): Detects and protects against overcurrent conditions in the H-bridges.
Sleep Mode: Reduces current consumption to 1.6 µA (typical) when not in use.

Usage Features

Dual H-Bridge Configuration: Allows for independent control of two DC motors or coordinated control of a single stepper motor.
Current Regulation: The device uses a fixed frequency PWM scheme to regulate the current through the motor windings. This is achieved by comparing the output current with a set trip point. The current trip point can be adjusted by varying the voltage on the xISEN pin or by changing the sense resistor value.
PWM Control: The AIN1 and AIN2 input pins control the state of the AOUT1 and AOUT2 outputs, respectively. Similarly, the BIN1 and BIN2 input pins control the state of the BOUT1 and BOUT2 outputs. This allows for flexible control of motor direction and speed.
Decay Modes: Supports both fast decay and slow decay modes for current regulation. Fast decay quickly dissipates energy from the motor winding, while slow decay allows the current to recirculate through the H-bridge, resulting in smoother operation and reduced EMI.
nSLEEP Pin: This pin enables or disables the device. Pulling nSLEEP low places the device in a low-power sleep mode, turning off most internal circuits and reducing current consumption. Pulling nSLEEP high enables the device.
Fault Output (nFAULT): An open-drain output that goes low when a fault condition (overtemperature, overcurrent, or undervoltage lockout) is detected. This allows for external monitoring of the device's status.
External Components: Requires minimal external components, primarily bulk capacitance for the power supply and bypass capacitors for VCP and VINT pins. A sense resistor is needed for current regulation.
PowerPAD™ Packaging: The DRV8833 is available in PowerPAD™ packages (PWP, PWP0016C, RTY), which provide an exposed thermal pad on the bottom of the package. This pad should be connected to the PCB ground plane to dissipate heat effectively, ensuring reliable operation.

Maintenance Features

Thermal Management: Proper thermal management is crucial for the DRV8833, especially when operating at higher currents. The PowerPAD™ package requires a good thermal connection to the PCB ground plane, often through thermal vias, to dissipate heat. Adequate copper area on the PCB is essential for maintaining the junction temperature within safe limits.
Bulk Capacitance: A large bulk capacitor (e.g., 10 µF) should be placed close to the VM pin to handle the transient currents drawn by the motor. This capacitor helps to stabilize the supply voltage and reduce ripple.
Bypass Capacitors: Small ceramic bypass capacitors (e.g., 0.01 µF to 2.2 µF) are recommended for the VCP and VINT pins to ensure stable operation of the internal circuitry.
Sense Resistor Selection: The choice of sense resistor (RSENSE) is critical for accurate current regulation. The value of RSENSE determines the current trip point and should be selected based on the desired motor current.
ESD Precautions: As with all semiconductor devices, proper ESD handling procedures should be followed during assembly and handling to prevent damage.
Fault Monitoring: The nFAULT pin provides an indication of internal fault conditions. Monitoring this pin can help in diagnosing issues and implementing protective measures in the system.
Documentation and Support: Texas Instruments provides comprehensive documentation, application notes, and an online community (TI E2E™) for design support and troubleshooting.