TEXAS INSTRUMENTS DRV8824 Technical data

DRV8824

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SLVSA06B –OCTOBER 2009–REVISED APRIL 2010

STEPPER MOTOR CONTROLLER IC

Check for Samples: DRV8824

FEATURES

• PWM Microstepping Motor Driver – Built-In Microstepping Indexer – Five-Bit Winding Current Control Allows Up

to 32 Current Levels

– Low MOSFET On-Resistance

• 1.6-A Maximum Drive Current at 24 V, 25°C

• Built-In 3.3-V Reference Output

• 8-V to 45-V Operating Supply Voltage Range

• Thermally Enhanced Surface Mount Package

DESCRIPTION

The DRV8824 provides an integrated motor driver solution for printers, scanners, and other automated equipment applications. The device has two H-bridge drivers and a microstepping indexer, and is intended to drive a bipolar stepper motor. The output driver block for each consists of N-channel power MOSFET’s configured as full H-bridges to drive the motor windings. The DRV8824 is capable of driving up to 1.6-A of output current (with proper heatsinking, at 24 V and 25°C).

A simple step/direction interface allows easy interfacing to controller circuits. Pins allow configuration of the motor in full-step up to 1/32-step modes. Decay mode is programmable.

Internal shutdown functions are provided for overcurrent protection, short circuit protection, undervoltage lockout and overtemperature.

The DRV8824 is available in a 28-pin HTSSOP package with PowerPAD™ (Eco-friendly: RoHS & no Sb/Br).

APPLICATIONS

• Automatic Teller Machines

• Money Handling Machines

• Video Security Cameras

• Printers

• Scanners

• Office Automation Machines

• Gaming Machines

• Factory Automation

• Robotics

ORDERING INFORMATION

–40°C to 85°C PowerPAD™ (HTSSOP) - PWP Reel of 2000 DRV8824PWPR 8824

(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 testingof all parameters.

PACKAGE

(2)

(1)

ORDERABLE PART TOP-SIDE

NUMBER MARKING

Charge

Pump

Thermal

Shut down

AOUT1

AOUT2

BOUT1

BOUT2

GNDGND

0.1uF

0.01uF

Step

Motor

VMA

VMB

CP1

CP2

VCP

ISENA

ISENB

STEP

DIR

MODE1

MODE2

AVREF

HS Gate

Drive

Internal

Reference &

Regs

Int. VCC

Motor

Driver B

nFAULT

Indexer /

Control

Logic

nRESET

Motor

Driver A

nENBL

nSLEEP

V3P3OUT

3.3V

LS Gate

Drive

3.3V

BVREF

MODE0

nHOME

DECAY

DRV8824

SLVSA06B –OCTOBER 2009–REVISED APRIL 2010

DEVICE INFORMATION

Functional Block Diagram

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Product Folder Link(s): DRV8824

DRV8824

www.ti.com

SLVSA06B –OCTOBER 2009–REVISED APRIL 2010

Table 1. TERMINAL FUNCTIONS

NAME PIN I/O

POWER AND GROUND

GND 14, 28 - Device ground VMA 4 - Bridge A power supply VMB 11 - Bridge B power supply

V3P3OUT 15 O 3.3-V regulator output CP1 1 IO Charge pump flying capacitor

CP2 2 IO Charge pump flying capacitor VCP 3 IO High-side gate drive voltage

CONTROL

nENBL 21 I Enable input

nSLEEP 17 I Sleep mode input

STEP 22 I Step input DIR 20 I Direction input Level sets the direction of stepping

MODE0 24 I Microstep mode 0 MODE1 25 I Microstep mode 1 MODE2 26 I Microstep mode 2

DECAY 19 I Decay mode

nRESET 16 I Reset input AVREF 12 I Bridge A current set reference input Reference voltage for winding current set.

BVREF 13 I Bridge B current set reference input

NC 23 No connect Leave this pin unconnected.

STATUS

nHOME 27 OD Home position Logic low when at home state of step table nFAULT 18 OD Fault

OUTPUT

ISENA 6 IO Bridge A ground / Isense Connect to current sense resistor for bridge A. ISENB 9 IO Bridge B ground / Isense Connect to current sense resistor for bridge B. AOUT1 5 O Bridge A output 1 AOUT2 7 O Bridge A output 2 BOUT1 10 O Bridge B output 1 BOUT2 8 O Bridge B output 2

(1) Directions: I = input, O = output, OZ = tri-state output, OD = open-drain output, IO = input/output

(1)

DESCRIPTION

Connect to motor supply (8 - 45 V). Both pins must be connected to same supply.

Bypass to GND with a 0.47-mF 6.3-V ceramic capacitor. Can be used to supply VREF.

Connect a 0.01-mF 50-V capacitor between CP1 and CP2.

Connect a 0.1-mF 16-V ceramic capacitor to VM.

Logic high to disable device outputs and indexer operation, logic low to enable

Logic high to enable device, logic low to enter low-power sleep mode

Rising edge causes the indexer to move one step

MODE0 - MODE2 set the step mode - full, 1/2, 1/4, 1/8/ 1/16, or 1/32 step

Low = slow decay, open = mixed decay, high = fast decay

Active-low reset input initializes the indexer logic and disables the H-bridge outputs

Normally AVREF and BVREF are connected to the same voltage. Can be connected to V3P3OUT. A 0.01-µF bypass capacitor to GND is recommended.

Logic low when in fault condition (overtemp, overcurrent)

Connect to bipolar stepper motor winding A. Positive current is AOUT1 → AOUT2

Connect to bipolar stepper motor winding B. Positive current is BOUT1 → BOUT2

EXTERNAL COMPONENTS

OR CONNECTIONS

Product Folder Link(s): DRV8824

DRV8824

SLVSA06B –OCTOBER 2009–REVISED APRIL 2010

www.ti.com

ABSOLUTE MAXIMUM RATINGS

over operating free-air temperature range (unless otherwise noted)

VMx Power supply voltage range –0.3 to 47 V

Digital pin voltage range –0.5 to 7 V

VREF Input voltage –0.3 to 4 V

ISENSEx pin voltage –0.3 to 0.8 V Peak motor drive output current, t < 1 mS Internally limited A Continuous motor drive output current

ESD rating V

Continuous total power dissipation See Dissipation Ratings table

stg

Operating virtual junction temperature range –40 to 150 °C Operating ambient temperature range –40 to 85 °C Storage temperature range –60 to 150 °C

(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings

only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating

conditions is not implied. Exposure to absolute maximum rated conditions for extended periods may affect device reliability. (2) All voltage values are with respect to network ground terminal. (3) Power dissipation and thermal limits must be observed.

(3)

HBD (human body model) 2000 CDM (charged device model) 500

(1) (2)

VALUE UNIT

1.6 A

DISSIPATION RATINGS (PRELIMINARY)

BOARD PACKAGE R

(1)

Low-K

(2)

Low-K High-K High-K

(3) (4)

PWP

qJA

67.5°C/W 14.8 mW/°C 1.85 W 1.18 W 0.96 W

39.5°C/W 25.3 mW/°C 3.16 W 2.02 W 1.64 W

33.5°C/W 29.8 mW/°C 3.73 W 2.38 W 1.94 W 28°C/W 35.7 mW/°C 4.46 W 2.85 W 2.32 W

(1) The JEDEC Low-K board used to derive this data was a 76-mm x 114-mm, 2-layer, 1.6-mm thick PCB with no backside copper. (2) The JEDEC Low-K board used to derive this data was a 76-mm x 114-mm, 2-layer, 1.6-mm thick PCB with 25-cm22-oz copper on back

side.

(3) The JEDEC High-K board used to derive this data was a 76-mm x 114-mm, 4-layer, 1.6-mm thick PCB with no backside copper and

solid 1-oz internal ground plane.

(4) The JEDEC High-K board used to derive this data was a 76-mm x 114-mm, 4-layer, 1.6-mm thick PCB with 25-cm21-oz copper on back

side and solid 1-oz internal ground plane.

DERATING FACTOR

ABOVE TA= 25°C

Product Folder Link(s): DRV8824

TA< 25°C TA= 70°C TA= 85°C

DRV8824

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RECOMMENDED OPERATING CONDITIONS

over operating free-air temperature range (unless otherwise noted)

V V I

V3P3

M REF

Motor power supply voltage range VREF input voltage

(2)

V3P3OUT load current 1 mA

(1) All VMpins must be connected to the same supply voltage. (2) Operational at VREF between 0 V and 1 V, but accuracy is degraded.

(1)

ELECTRICAL CHARACTERISTICS

over operating free-air temperature range (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

POWER SUPPLIES

VMQ

UVLO

V3P3OUT REGULATOR

3P3

LOGIC-LEVEL INPUTS

HYS

nHOME, nFAULT OUTPUTS (OPEN-DRAIN OUTPUTS)

DECAY INPUT

H-BRIDGE FETS

DS(ON)

OFF

MOTOR DRIVER

PWM

BLANK

DEAD

PROTECTION CIRCUITS

OCP

TSD

VM operating supply current VM= 24 V, f

< 50 kHz 5 8 mA

PWM

VM sleep mode supply current VM= 24 V 10 20 mA VM undervoltage lockout voltage VMrising 7.8 8.2 V

V3P3OUT voltage IOUT = 0 to 1 mA 3.2 3.3 3.4 V

Input low voltage 0.6 0.7 V Input high voltage 2 5.25 V Input hysteresis 0.45 V Input low current VIN = 0 –20 20 mA Input high current VIN = 3.3 V 100 mA

Output low voltage IO= 5 mA 0.5 V Output high leakage current VO= 3.3 V 1 mA

Input low threshold voltage For slow decay mode 0.8 V Input high threshold voltage For fast decay mode 2 V Input current ±40 µA

HS FET on resistance Ω

LS FET on resistance Ω

VM= 24 V, IO= 1 A, TJ= 25°C 0.63 VM= 24 V, IO= 1 A, TJ= 85°C 0.76 0.90 VM= 24 V, IO= 1 A, TJ= 25°C 0.65 VM= 24 V, IO= 1 A, TJ= 85°C 0.78 0.90

Off-state leakage current –20 20 mA

Internal PWM frequency 37 50 63 kHz Current sense blanking time 3.75 ms Rise time VM= 24 V 100 360 ns Fall time VM= 24 V 80 250 ns Dead time 400 ns

Overcurrent protection trip level 1.8 5 A Thermal shutdown temperature Die temperature 150 160 180 °C

SLVSA06B –OCTOBER 2009–REVISED APRIL 2010

MIN NOM MAX UNIT

8.2 45 V 1 3.5 V

Product Folder Link(s): DRV8824

DRV8824

SLVSA06B –OCTOBER 2009–REVISED APRIL 2010

ELECTRICAL CHARACTERISTICS (continued)

over operating free-air temperature range (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

CURRENT CONTROL

REF

TRIP

ΔI

TRIP

ISENSE

xVREF input current xVREF = 3.3 V –3 3 mA xISENSE trip voltage xVREF = 3.3 V, 100% current setting 635 660 685 mV

xVREF = 3.3 V , 5% current setting –25 25 xVREF = 3.3 V , 10% - 34% current

Current trip accuracy (relative to programmed value)

setting xVREF = 3.3 V, 38% - 67% current

setting xVREF = 3.3 V, 71% - 100% current

setting

Current sense amplifier gain Reference only 5 V/V

TIMING REQUIREMENTS

1 f 2 t 3 t 4 t 5 t 6 t 7 t

STEP WH(STEP) WL(STEP) SU(STEP) H(STEP) ENBL WAKE

Step frequency 250 kHz Pulse duration, STEP high 1.9 ms Pulse duration, STEP low 1.9 ms Setup time, command to STEP rising 200 ns Hold time, command to STEP rising 200 ns Enable time, nENBL active to STEP 200 ns Wakeup time, nSLEEP inactive to STEP 1 mS

–15 15

–10 10

–5 5

MIN MAX UNIT

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Figure 1. Timing Diagram

Product Folder Link(s): DRV8824

DRV8824

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SLVSA06B –OCTOBER 2009–REVISED APRIL 2010

FUNCTIONAL DESCRIPTION

PWM Motor Drivers

The DRV8824 contains two H-bridge motor drivers with current-control PWM circuitry. A block diagram of the motor control circuitry is shown in Figure 2.

Figure 2. Motor Control Circuitry

Note that there are multiple VM motor power supply pins. All VM pins must be connected together to the motor supply voltage.

Product Folder Link(s): DRV8824

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