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DRV8811

www.ti.com

SLVS865G –SEPTEMBER 2008–REVISED MAY 2010

STEPPER MOTOR CONTROLLER IC

Check for Samples: DRV8811

FEATURES

APPLICATIONS

• Printers

• Pulse Width Modulation (PWM) Microstepping

Motor Driver

• Scanners

• Office Automation Machines

– Built-In Microstepping Indexer

• Gaming Machines

– Up to 2.5-A Current Per Winding

• Factory Automation

– Three-Bit Winding Current Control Allows

• Robotics

up to Eight Current Levels

– Low MOSFET On-Resistance

• 8-V to 38-V Operating Supply Voltage Range

• Thermally Enhanced Surface Mount Package

DESCRIPTION/ORDERING INFORMATION

The DRV8811 provides an integrated stepper motor driver solution for printers, scanners, and other automated

equipment applications. The device has two H-bridge drivers, as well as microstepping indexer logic to control a

stepper motor.

The output driver block for each consists of N-channel power MOSFETs configured as full H-bridges to drive the

motor windings.

A simple step/direction interface allows easy interfacing to controller circuits. Pins allow configuration of the

motor in full-step, half-step, quarter-step, or eighth-step modes. Decay mode and PWM off time are

programmable.

Internal shutdown functions are provided for over current protection, short circuit protection, under-voltage

lockout and overtemperature.

The DRV8811 is packaged in a PowerPAD™ 28-pin HTSSOP package with thermal pad (Eco-friendly: RoHS

and no Sb/Br).

ORDERING INFORMATION

(1)

PACKAGE

(2)

ORDERABLE PART NUMBER TOP-SIDE MARKING

Reel of 2000 DRV8811PWPR

–40°C to 85°C PowerPAD™ (HTSSOP) – PWP DRV8811

Tube of 50 DRV8811PWP

(1) For the most current package 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)

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DRV8811 www.ti.com SLVS865G – SEPTEMBER 2008 – REVISED MAY 2010 STEPPER MOTOR CONTROLLER IC Check for Samples: DRV8811 FEATURES APPLICATIONS • • • • • • • 1 Pulse Width Modulation (PWM) Microstepping Motor Driver – Built-In Microstepping Indexer – Up to 2.
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DRV8811 SLVS865G – SEPTEMBER 2008 – REVISED MAY 2010 www.ti.com FUNCTIONAL BLOCK DIAGRAM VM VCC CP1 Internal VCC VCC 0.22 µF Internal VGD Reference Charge CP2 Internal Ref VM Pump and VCC LS Gate Drive Regulator VCP Thermal 0.
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DRV8811 www.ti.com SLVS865G – SEPTEMBER 2008 – REVISED MAY 2010 TERMINAL FUNCTIONS NAME NO. I/O (1) DESCRIPTION EXTERNAL COMPONENTS OR CONNECTIONS POWER AND GROUND GND 7, 21 - Device ground VMA 28 - Bridge A power supply Connect to motor supply (8 V to 38 V). Both pins must be connected to same supply. VMB 15 - Bridge B power supply Connect to motor supply (8 V to 38 V). Both pins must be connected to same supply. VCC 10 - Logic supply voltage Connect to 3-V to 5-V logic supply.
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DRV8811 SLVS865G – SEPTEMBER 2008 – REVISED MAY 2010 www.ti.com PWP (HTSSOP) PACKAGE ISENA HOME DIR AOUT1 DECAY RCA GND VREF RCB VCC BOUT1 USM1 USM0 ISENB ABSOLUTE MAXIMUM RATINGS (1) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 GND (PPAD) 28 27 26 25 24 23 22 21 20 19 18 17 16 15 VMA SLEEPn ENABLEn AOUT2 CP2 CP1 VCP GND VGD STEP BOUT2 RESETn SRn VMB (2) (3) over operating free-air temperature range (unless otherwise noted) MIN MAX UNIT VMX Power supply voltage range –0.
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DRV8811 www.ti.com SLVS865G – SEPTEMBER 2008 – REVISED MAY 2010 RECOMMENDED OPERATING CONDITIONS over operating free-air temperature range (unless otherwise noted) MIN NOM MAX UNIT VM Motor power supply voltage range (1) 8 38 V VCC Logic power supply voltage range 3 5.5 V VREF VREF input voltage VCC V (1) All VM pins must be connected to the same supply voltage.
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DRV8811 SLVS865G – SEPTEMBER 2008 – REVISED MAY 2010 www.ti.com ELECTRICAL CHARACTERISTICS over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Power Supplies IVM VM operating supply current VM = 35 V, fPWM < 50 KHz 4.5 8 mA IVCC VCC operating supply current fPWM < 50 KHz 0.
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DRV8811 www.ti.
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DRV8811 SLVS865G – SEPTEMBER 2008 – REVISED MAY 2010 www.ti.com FUNCTIONAL DESCRIPTION PWM H-Bridge Drivers DRV8811 contains two H-bridge motor drivers with current-control PWM circuitry, and a microstepping indexer. A block diagram of the motor control circuitry is shown below. VM OCP VGD VMA VCP AOUT1 + RCA Predrive Step Motor AOUT2 – PWM + – OCP ISENA A=8 DAC OCP VGD VCP Control / Indexer Logic VM VMB BOUT1 Predrive BOUT2 PWM OCP ISENB A=8 DAC RCB DECAY VREF Figure 1.
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DRV8811 www.ti.com SLVS865G – SEPTEMBER 2008 – REVISED MAY 2010 Current Regulation The PWM chopping current is set by a comparator, which compares the voltage across a current sense resistor, multiplied by a factor of 8, with a reference voltage. The reference voltage is input from the VREF pin. The full-scale (100%) chopping current is calculated as follows: ICHOP = VREFX 8 · RISENSE (1) Example: If a 0.22-Ω sense resistor is used and the VREFx pin is 3.
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DRV8811 SLVS865G – SEPTEMBER 2008 – REVISED MAY 2010 www.ti.com VM 1 Drive current 1 xOUT2 xOUT1 3 2 Fast decay (reverse) 3 Slow decay (brake) 2 Figure 2. Decay Mode The DRV8811 also supports a mixed decay mode. Mixed decay mode begins as fast decay, but after a period of time switches to slow decay mode for the remainder of the fixed off time. Fast and mixed decay modes are only active if the current through the winding is decreasing; if the current is increasing, then slow decay is always used.
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DRV8811 www.ti.com SLVS865G – SEPTEMBER 2008 – REVISED MAY 2010 PWM ON Q PWM OFF ON ITRIP ON 0.6 × VCC Q (tOFF) PWM_ON S R ITRIP VBLANK BLANK RCx Winding Current PWM R 0.6 × VBLANK RCx VCC C VCC PWM_OFF 0.21 × VCC VDECAY Voltage 0.21 × VCC FAST BLANK (tFD) SLOW FAST_DECAY DECAY DECAY To other PWM Figure 3. PWM Microstepping Indexer Built-in indexer logic in the DRV8811 allows a number of different stepping configurations.
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DRV8811 SLVS865G – SEPTEMBER 2008 – REVISED MAY 2010 FULL STEP USM = 00 www.ti.com 1/4 STEP USM = 10 1/8 STEP USM = 11 1 1 1 100 0 0 2 98 20 11.325 3 92 38 22.5 4 83 56 33.75 5 71 71 45 (home state) 6 56 83 56.25 7 38 92 67.5 8 20 98 78.75 9 0 100 90 10 –20 98 101.25 11 –38 92 112.5 12 –56 83 123.75 13 –71 71 135 14 –83 56 146.25 15 –92 38 157.5 16 –98 20 168.75 17 –100 0 180 18 –98 –20 191.25 19 –92 –38 202.
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DRV8811 www.ti.com SLVS865G – SEPTEMBER 2008 – REVISED MAY 2010 Protection Circuits Overcurrent Protection (OCP) If the current through any FET exceeds the preset overcurrent threshold, all FETs in the H-bridge will be disabled until the ENABLEn pin has been brought inactive high and then back low, or power is removed and re-applied. Overcurrent conditions are sensed in both directions; i.e., a short to ground, supply, or across the motor winding will all result in an overcurrent shutdown.
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DRV8811 SLVS865G – SEPTEMBER 2008 – REVISED MAY 2010 www.ti.com THERMAL INFORMATION Thermal Protection The DRV8811 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 thermal shutdown is an indication of either excessive power dissipation, insufficient heatsinking, or too high an ambient temperature.
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DRV8811 www.ti.com SLVS865G – SEPTEMBER 2008 – REVISED MAY 2010 PD - Max Power Dissipation - Watts POWER DISSIPATION (2-LAYER) POWER DISSIPATION (4-LAYER) A A 2 TA - Ambien Temperature - °C Figure 4. Figure 5. TYPICAL RDS(ON) vs TEMPERATURE THERMAL RESISTANCE vs COPPER AREA RDS(ON) - mΩ θJA Temperature - °C Figure 6. Figure 7.
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PACKAGE OPTION ADDENDUM www.ti.com 14-May-2010 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Eco Plan (2) Qty DRV8811PWP ACTIVE HTSSOP PWP 28 DRV8811PWPR ACTIVE HTSSOP PWP 28 50 Lead/Ball Finish MSL Peak Temp (3) Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HR (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device DRV8811PWPR 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.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) DRV8811PWPR HTSSOP PWP 28 2000 367.0 367.0 38.
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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 JESD46C and to discontinue any product or service per JESD48B. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.