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DRV8834

www.ti.com

SLVSB19C –FEBRUARY 2012–REVISED JUNE 2013

DUAL BRIDGE STEPPER OR DC MOTOR DRIVER

Check for Samples: DRV8834

FEATURES

• Dual-H-Bridge Current-Control Motor Driver

• Dynamic t

BLANK

and Mixed Decay Modes for

Smooth Microstepping

– Capable of Driving Two DC Motors or One

Stepper Motor • PWM Winding Current Regulation and Limiting

• Two Control Modes: • Thermally Enhanced Surface Mount Package

– Built-In Indexer Logic With Simple

APPLICATIONS

STEP/DIRECTION Control and Up to

1/32-Step Microstepping

• Battery-Powered Toys

– PHASE/ENABLE Control, With the Ability to

• POS Printers

Drive External References for > 1/32-Step

• Video Security Cameras

Microstepping

• Office Automation Machines

• Output Current 1.5-A Continuous, 2.2-A Peak

• Gaming Machines

per H-Bridge (at V

= 5 V, 25°C)

• Robotics

• Low R

DS(ON)

: 305-mΩ HS + LS

(at V

= 5 V, 25°C)

• Wide Power Supply Voltage Range:

2.5 V – 10.8 V

DESCRIPTION

The DRV8834 provides a flexible motor driver solution for toys, printers, cameras, and other mechatronic

applications. The device has two H-bridge drivers, and is intended to drive a bipolar stepper motor or two DC

motors.

The output driver block of each H-bridge consists of N-channel power MOSFET’s configured as an H-bridge to

drive the motor windings. Each H-bridge includes circuitry to regulate or limit the winding current.

With proper PCB design, each H-bridge of the DRV8834 is capable of driving up to 1.5-A RMS (or DC)

continuously, at 25°C with a V

supply of 5 V. It can support peak currents of up to 2.2 A per bridge. Current

capability is reduced slightly at lower V

voltages.

Internal shutdown functions with a fault output pin are provided for over current protection, short circuit

protection, under voltage lockout and overtemperature. A low-power sleep mode is also provided.

The DRV8834 is packaged in a 24-pin HTSSOP or VQFN package with PowerPAD™ (Eco-friendly: RoHS & no

Sb/Br).

ORDERING INFORMATION

(1)

ORDERABLE PART TOP-SIDE

PACKAGE

(2)

NUMBER MARKING

Reel of 2000 DRV8834PWPR

PowerPAD™ (HTSSOP) - PWP DRV8834

Tube of 60 DRV8834PWP

Reel of 3000 DRV8834RGER

PowerPAD™ (VQFN) - RGE 8834

Reel of 250 DRV8834RGET

(1) For the most current packaging and ordering information, see the Package Option Addendum at the end of this document, or see the TI

web site at www.ti.com.

(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2PowerPAD is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (32 pages)

PAGE 1
DRV8834 www.ti.com SLVSB19C – FEBRUARY 2012 – REVISED JUNE 2013 DUAL BRIDGE STEPPER OR DC MOTOR DRIVER Check for Samples: DRV8834 FEATURES 1 • 2 • • • • Dual-H-Bridge Current-Control Motor Driver – Capable of Driving Two DC Motors or One Stepper Motor Two Control Modes: – Built-In Indexer Logic With Simple STEP/DIRECTION Control and Up to 1/32-Step Microstepping – PHASE/ENABLE Control, With the Ability to Drive External References for > 1/32-Step Microstepping Output Current 1.5-A Continuous, 2.
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DRV8834 SLVSB19C – FEBRUARY 2012 – REVISED JUNE 2013 www.ti.com DEVICE INFORMATION Functional Block Diagram VM VM + 0.01µF VM VM VM 10µF VCP VINT 2.2µF VREFO Internal Ref & Regs VINT, refs, Int. supp. Charge Pump VCP 0.
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DRV8834 www.ti.com SLVSB19C – FEBRUARY 2012 – REVISED JUNE 2013 Table 1. TERMINAL FUNCTIONS NAME PIN (PWP) PIN (RGE) I/O (1) EXTERNAL COMPONENTS OR CONNECTIONS DESCRIPTION POWER AND GROUND GND 21, PPAD 18, PPAD - Device ground Both the GND pin and device PowerPAD must be connected to ground VM 18, 19 15, 16 - Bridge A power supply Connect to motor supply. A 10-µF (minimum) capacitor to GND is recommended. VINT 20 17 - Internal supply Bypass to GND with 2.2-μF (minimum), 6.
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DRV8834 SLVSB19C – FEBRUARY 2012 – REVISED JUNE 2013 www.ti.com Table 1.
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DRV8834 www.ti.com SLVSB19C – FEBRUARY 2012 – REVISED JUNE 2013 ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range (unless otherwise noted) VM Power supply voltage range AVREF, BVREF, VINT, ADECAY, BDECAY Analog input pin voltage range (1) (2) Digital input pin voltage range xISEN pin voltage Peak motor drive output current, t < 1 µs VALUE UNIT –0.3 to 11.8 V -0.5 to 3.6 V –0.5 to 7 V –0.3 to 0.
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DRV8834 SLVSB19C – FEBRUARY 2012 – REVISED JUNE 2013 www.ti.com ELECTRICAL CHARACTERISTICS TA = 25°C, over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX VM = 5 V, excluding winding current 2.4 4 VM = 10 V, excluding winding current 2.75 UNIT POWER SUPPLY IVM VM operating supply current IVMQ VM sleep mode supply current VUVLO VM undervoltage lockout voltage VM = 5 V 0.6 VM = 10 V 9.6 VM falling 2 mA μA 2.
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DRV8834 www.ti.com SLVSB19C – FEBRUARY 2012 – REVISED JUNE 2013 ELECTRICAL CHARACTERISTICS (continued) TA = 25°C, over operating free-air temperature range (unless otherwise noted) PARAMETER tTSD TEST CONDITIONS Thermal shutdown temperature Die temperature MIN TYP MAX UNIT 150 160 180 °C 1 µA CURRENT CONTROL IREF VREF input current VREF = 3.
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DRV8834 SLVSB19C – FEBRUARY 2012 – REVISED JUNE 2013 www.ti.com FUNCTIONAL DESCRIPTION Device Configuration The DRV8834 supports two configurations: phase/enable mode, where the outputs are controlled by phase (direction) and enable signals for each H-bridge, and indexer mode, which allow control of a stepper motor using simple step and direction inputs. DC motors can only be controlled in phase/enable mode; indexer mode is not applicable to DC motors.
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DRV8834 www.ti.com SLVSB19C – FEBRUARY 2012 – REVISED JUNE 2013 With stepping motors, current control is normally used at all times. Often it is used to vary the current in the two windings in a sinusoidal fashion to provide smooth motion. This is referred to as microstepping. The DRV8834 can provide up to 1/32 step microstepping, using internal 5-bit DACs. Finer microstepping can be implemented using the xPHASE/xENBL signals to control the stepper motor, and varying the xVREF voltages.
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DRV8834 SLVSB19C – FEBRUARY 2012 – REVISED JUNE 2013 www.ti.com xVM 1 Drive Current 1 2 Fast decay xOUT2 xOUT1 3 Slow decay 2 3 Figure 2. Decay Modes The DRV8834 supports fast, slow, and also mixed decay modes. With DC motors, slow decay is nearly always used to minimize current ripple and optimize speed control; with stepper motors, the decay mode is chosen for a given stepper motor and operating conditions to minimize mechanical noise and vibration.
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DRV8834 www.ti.com SLVSB19C – FEBRUARY 2012 – REVISED JUNE 2013 Figure 3 illustrates the current waveforms in slow, 25% mixed, and fast decay modes. I ITRIP Slow 25% Mixed Fast 0mA 25% 50% PWM on 75% 100% t PWM off (tOFF) PWM cycle Figure 3. Current Decay Modes Decay mode is selected by the voltage present on the xDECAY pins. Internal current sources of 10 µA (typical) are connected to the pins, which allows setting of the decay mode by a resistor connected to ground if desired.
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DRV8834 SLVSB19C – FEBRUARY 2012 – REVISED JUNE 2013 www.ti.com Phase/Enable Mode In phase/enable mode, the xPHASE input pins control the direction of current flow through each H-bridge. This sets the direction of rotation of a DC motor, or the direction of the current flow in a stepper motor winding. Driving the xENBL input pins active high enables the H-bridge outputs. This can be used as PWM speed control of a DC motor, or to enable/disable the current in a stepper motor.
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DRV8834 www.ti.com SLVSB19C – FEBRUARY 2012 – REVISED JUNE 2013 Table 5.
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DRV8834 SLVSB19C – FEBRUARY 2012 – REVISED JUNE 2013 www.ti.com Table 5.
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DRV8834 www.ti.com SLVSB19C – FEBRUARY 2012 – REVISED JUNE 2013 Table 5.
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DRV8834 SLVSB19C – FEBRUARY 2012 – REVISED JUNE 2013 www.ti.com When exiting sleep mode, the nFAULT pin will be briefly driven active low as the internal power supplies turn on. nFAULT will return to inactive high once the internal power supplies (including charge pump) have stabilized. This process takes some time (up to 1 ms), before the motor driver becomes fully operational. Protection Circuits The DRV8834 is fully protected against undervoltage, overcurrent and overtemperature events.
PAGE 17
DRV8834 www.ti.com SLVSB19C – FEBRUARY 2012 – REVISED JUNE 2013 APPLICATIONS INFORMATION The DRV8834 is a very flexible motor driver. It can be used to drive two DC motors or a stepper motor, in a number of different configurations. The following applications schematics show various configurations and connections for the DRV8834. Note that component values, especially for RSENSE and the DECAY pins, may be different depending on your motor and application.
PAGE 18
DRV8834 SLVSB19C – FEBRUARY 2012 – REVISED JUNE 2013 www.ti.com Phase/Enable Mode Driving a Stepper Motor Phase/enable mode can be used with a simple interface to a controller to operate a stepper motor in full, half, or quarter step modes. The decay mode can be set by changing the values of the resistors connected to the ADECAY and BDECAY pins. The M1 pin is driven to logic high (by connecting to the VINT supply), to allow a zero-current (off) state when the xENBL pin is set low.
PAGE 19
DRV8834 www.ti.com SLVSB19C – FEBRUARY 2012 – REVISED JUNE 2013 Indexer Mode Driving a Stepper Motor In indexer mode, only a rising edge on the STEP pin is needed to move the motor to the next step. The DIR pin sets which direction the motor rotates, by reversing the step sequence. The internal indexer can operate in fullstep, half-step, and smaller microsteps up to 1/32-step, depending on the state of the M0 and M1 pins.
PAGE 20
DRV8834 SLVSB19C – FEBRUARY 2012 – REVISED JUNE 2013 www.ti.com High-Resolution Microstepping Using a Microcontroller to Modulate VREF Signals Using a microcontroller with two DAC outputs, very high resolution microstepping can be performed with the DRV8834. In this mode, the coil current direction is controlled by the PHASE pins, and the current in each coil is independently set using the two VREF input pins, which are connected to DACs.
PAGE 21
DRV8834 www.ti.com SLVSB19C – FEBRUARY 2012 – REVISED JUNE 2013 THERMAL INFORMATION Maximum Output Current In actual operation, the maximum output current achievable with a motor driver is a function of die temperature. This in turn is greatly affected by ambient temperature and PCB design.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 29-May-2013 continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
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PACKAGE MATERIALS INFORMATION www.ti.com 29-May-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) DRV8834PWPR HTSSOP PWP 24 2000 330.0 16.4 DRV8834RGER VQFN RGE 24 3000 330.0 DRV8834RGET VQFN RGE 24 250 180.0 6.95 8.3 1.6 8.0 16.0 Q1 12.4 4.25 4.25 1.15 8.0 12.0 Q2 12.4 4.25 4.25 1.15 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 29-May-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) DRV8834PWPR HTSSOP PWP 24 2000 367.0 367.0 38.0 DRV8834RGER VQFN RGE 24 3000 367.0 367.0 35.0 DRV8834RGET VQFN RGE 24 250 210.0 185.0 35.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.