Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - motor controllers Half-bridge (4) Step/polarity HTSSOP 28

DRV8825

www.ti.com

SLVSA73E –APRIL 2010–REVISED AUGUST 2013

STEPPER MOTOR CONTROLLER IC

Check for Samples: DRV8825

FEATURES

APPLICATIONS

• PWM Microstepping Motor Driver

• Automatic Teller Machines

– Built-In Microstepping Indexer • Money Handling Machines

– Five-Bit Winding Current Control Allows Up • Video Security Cameras

to 32 Current Levels

• Printers

– Low MOSFET On-Resistance

• Scanners

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

• Office Automation Machines

• Built-In 3.3-V Reference Output

• Gaming Machines

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

• Factory Automation

• Thermally Enhanced Surface Mount Package

• Robotics

DESCRIPTION

The DRV8825 provides an integrated motor driver solution for printers, scanners, and other automated

equipment applications. The device has two H-bridge drivers, and can drive a bipolar stepper motor or two DC

motors. The output driver block for each consists of N-channel power MOSFET’s configured as full H-bridges to

drive the motor windings. The DRV8825 can supply up to 2.5-A peak or 1.75-A RMS 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 DRV8825 is available in a 28-pin HTSSOP package with PowerPAD™ (Eco-friendly: RoHS & no Sb/Br).

ORDERING INFORMATION

(1)

ORDERABLE PART TOP-SIDE

PACKAGE

(2)

NUMBER MARKING

PowerPAD™ (HTSSOP) - PWP Reel of 2000 DRV8825PWPR 8825

(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 (22 pages)

PAGE 1
DRV8825 www.ti.com SLVSA73E – APRIL 2010 – REVISED AUGUST 2013 STEPPER MOTOR CONTROLLER IC Check for Samples: DRV8825 FEATURES APPLICATIONS • • • • • • • • • • 1 2 • • • • PWM Microstepping Motor Driver – Built-In Microstepping Indexer – Five-Bit Winding Current Control Allows Up to 32 Current Levels – Low MOSFET On-Resistance 2.5-A Maximum Drive Current at 24 V, 25°C Built-In 3.3-V Reference Output 8.
PAGE 2
DRV8825 SLVSA73E – APRIL 2010 – REVISED AUGUST 2013 www.ti.com DEVICE INFORMATION Functional Block Diagram CP1 Internal Reference & Regs Int. VCC LS Gate Drive V3P3OUT 0.01mF CP2 VM Charge Pump VCP 3.3 V 0.1mF 3.
PAGE 3
DRV8825 www.ti.com SLVSA73E – APRIL 2010 – REVISED AUGUST 2013 Table 1. TERMINAL FUNCTIONS NAME PIN I/O (1) EXTERNAL COMPONENTS OR CONNECTIONS DESCRIPTION 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 Connect a 0.1-μF 16-V ceramic capacitor and a 1-MΩ resistor to VM.
PAGE 4
DRV8825 SLVSA73E – APRIL 2010 – REVISED AUGUST 2013 4 www.ti.
PAGE 5
DRV8825 www.ti.com SLVSA73E – APRIL 2010 – REVISED AUGUST 2013 ABSOLUTE MAXIMUM RATINGS (1) (2) VMx VREF VALUE UNIT Power supply voltage range –0.3 to 47 V Digital pin voltage range –0.5 to 7 V Input voltage –0.3 to 4 V –0.3 to 0.8 V Peak motor drive output current, t < 1 μS Internally limited A Continuous motor drive output current (3) 2.
PAGE 6
DRV8825 SLVSA73E – APRIL 2010 – REVISED AUGUST 2013 www.ti.com ELECTRICAL CHARACTERISTICS over operating free-air temperature range of -40°C to 85°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT POWER SUPPLIES IVM VM operating supply current VM = 24 V 5 8 mA IVMQ VM sleep mode supply current VM = 24 V 10 20 μA VUVLO VM undervoltage lockout voltage VM rising 7.8 8.2 V 3.3 3.4 V V3P3OUT REGULATOR V3P3 V3P3OUT voltage IOUT = 0 to 1 mA 3.
PAGE 7
DRV8825 www.ti.com SLVSA73E – APRIL 2010 – REVISED AUGUST 2013 ELECTRICAL CHARACTERISTICS (continued) over operating free-air temperature range of -40°C to 85°C (unless otherwise noted) PARAMETER AISENSE Current sense amplifier gain TEST CONDITIONS Reference only MIN TYP MAX UNIT 5 V/V TIMING REQUIREMENTS MIN MAX UNIT 250 kHz 1 fSTEP Step frequency 2 tWH(STEP) Pulse duration, STEP high 1.9 μs 3 tWL(STEP) Pulse duration, STEP low 1.
PAGE 8
DRV8825 SLVSA73E – APRIL 2010 – REVISED AUGUST 2013 www.ti.com FUNCTIONAL DESCRIPTION PWM Motor Drivers The DRV8825 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.
PAGE 9
DRV8825 www.ti.com SLVSA73E – APRIL 2010 – REVISED AUGUST 2013 Current Regulation The current through the motor windings is regulated by a fixed-frequency PWM current regulation, or current chopping. When an H-bridge is enabled, current rises through the winding at a rate dependent on the DC voltage and inductance of the winding. Once the current hits the current chopping threshold, the bridge disables the current until the beginning of the next PWM cycle.
PAGE 10
DRV8825 SLVSA73E – APRIL 2010 – REVISED AUGUST 2013 www.ti.com The DRV8825 supports fast decay, slow decay and a mixed decay mode. Slow, fast, or mixed decay mode is selected by the state of the DECAY pin - logic low selects slow decay, open selects mixed decay operation, and logic high sets fast decay mode. The DECAY pin has both an internal pullup resistor of approximately 130 kΩ and an internal pulldown resistor of approximately 80 kΩ. This sets the mixed decay mode if the pin is left open or undriven.
PAGE 11
DRV8825 www.ti.com SLVSA73E – APRIL 2010 – REVISED AUGUST 2013 Table 3.
PAGE 12
DRV8825 SLVSA73E – APRIL 2010 – REVISED AUGUST 2013 www.ti.com Table 3.
PAGE 13
DRV8825 www.ti.com SLVSA73E – APRIL 2010 – REVISED AUGUST 2013 Table 3.
PAGE 14
DRV8825 SLVSA73E – APRIL 2010 – REVISED AUGUST 2013 www.ti.com Overcurrent Protection (OCP) An analog current limit circuit on each FET limits the current through the FET by removing the gate drive. If this analog current limit persists for longer than the OCP time, all FETs in the H-bridge will be disabled and the nFAULT pin will be driven low. The device will remain disabled until either nRESET pin is applied, or VM is removed and re-applied. Overcurrent conditions on both high and low side devices; i.
PAGE 15
DRV8825 www.ti.com SLVSA73E – APRIL 2010 – REVISED AUGUST 2013 THERMAL INFORMATION Thermal Protection The DRV8825 has thermal shutdown (TSD) as described above. If the die temperature exceeds approximately 150°C, the device will be disabled until the temperature drops to a safe level. Any tendency of the device to enter TSD is an indication of either excessive power dissipation, insufficient heatsinking, or too high an ambient temperature.
PAGE 16
PACKAGE OPTION ADDENDUM www.ti.
PAGE 17
PACKAGE MATERIALS INFORMATION www.ti.com 13-Aug-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device DRV8825PWPR Package Package Pins Type Drawing SPQ HTSSOP 2000 PWP 28 Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 330.0 16.4 Pack Materials-Page 1 6.9 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 10.2 1.8 12.0 16.
PAGE 18
PACKAGE MATERIALS INFORMATION www.ti.com 13-Aug-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) DRV8825PWPR HTSSOP PWP 28 2000 367.0 367.0 38.
PAGE 19
PAGE 20
PAGE 21
PAGE 22
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.