SLVSD19A June   2015  – July 2015 DRV8881

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      DRV8881E Simplified System Diagram
      2.      DRV8881P Simplified System Diagram
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
    2.     DRV8881E PH/EN Pin Functions
    3.     DRV8881P PWM Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagrams
    3. 7.3 Feature Description
      1. 7.3.1  Motor Driver Current Ratings
        1. 7.3.1.1 Peak Current Rating
        2. 7.3.1.2 RMS Current Rating
        3. 7.3.1.3 Full-Scale Current Rating
      2. 7.3.2  PWM Motor Drivers
      3. 7.3.3  Bridge Control
      4. 7.3.4  Current Regulation
      5. 7.3.5  Decay Modes
        1. 7.3.5.1 Mode 1: Slow Decay
        2. 7.3.5.2 Mode 2: Fast Decay
        3. 7.3.5.3 Mode 3: 30%/70% Mixed Decay
      6. 7.3.6  Smart tune
      7. 7.3.7  Adaptive Blanking Time
      8. 7.3.8  Parallel Mode
      9. 7.3.9  Charge Pump
      10. 7.3.10 LDO Voltage Regulator
      11. 7.3.11 Logic and Tri-Level Pin Diagrams
      12. 7.3.12 Protection Circuits
        1. 7.3.12.1 VM Undervoltage Lockout (UVLO)
        2. 7.3.12.2 VCP UVLO (CPUV)
        3. 7.3.12.3 Overcurrent Protection (OCP)
        4. 7.3.12.4 Thermal Shutdown (TSD)
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 DRV8881P Typical Application
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Current Regulation
          2. 8.2.1.2.2 Stepper Motor Speed
          3. 8.2.1.2.3 Decay Modes
          4. 8.2.1.2.4 Sense Resistor
        3. 8.2.1.3 Application Curve
      2. 8.2.2 Alternate Application
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
          1. 8.2.2.2.1 Current Regulation
        3. 8.2.2.3 Application Curves
  9. 9 Power Supply Recommendations
    1. 9.1 Bulk Capacitance Sizing
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5 Pin Configuration and Functions

PWP Package
28-Pin HTSSOP
Top View DRV8881E
DRV8881 po_E_PWP_lvsd19.gif
RHR Package
28-Pin WQFN
Top View DRV8881E
DRV8881 po_E_RHR_lvsd19.gif
PWP Package
28-Pin HTSSOP
Top View DRV8881P
DRV8881 po_P_PWP_lvsd19.gif
RHR Package
28-Pin WQFN
Top View DRV8881P
DRV8881 po_P_RHR_lvsd19.gif

Pin Functions

PIN TYPE DESCRIPTION
NAME PWP RHR
CPL 1 27 PWR Charge pump output Connect a VM rated, 0.1-µF ceramic capacitor between CPH and CPL
CPH 2 28
VCP 3 1 O Charge pump output Connect a 16-V, 0.47-µF ceramic capacitor to VM
VM 4, 11 2, 9 PWR Power supply Connect to motor supply voltage; bypass to GND with two 0.1 µF (for each pin) plus one bulk capacitor rated for VM
AOUT1 5 3 O Winding A output H-bridge outputs, drives one winding of a stepper motor
AOUT2 7 5
AISEN 6 4 O Winding A sense Requires sense resistor to GND; value sets peak current in winding A
BOUT2 8 6 O Winding B output H-bridge outputs, drives one winding of a stepper motor
BOUT1 10 8
BISEN 9 7 O Winding B sense Requires sense resistor to GND; value sets peak current in winding B
GND 12, 28 10, 26 PWR Device ground Must be connected to ground
AVREF 13 11 I Reference voltage input Voltage on this pin sets the full scale chopping current in H-bridge A
BVREF 14 12 Voltage on this pin sets the full scale chopping current in H-bridge B
V3P3 15 13 — Internal regulator Internal supply voltage; bypass to GND with a 6.3-V, 0.47-µF ceramic capacitor; up to 10-mA external load
TOFF 16 14 I Decay mode off time set Sets the off-time during current chopping; tri-level pin
nSLEEP 17 15 I Sleep mode input Logic high to enable device; logic low to enter low-power sleep mode; internal pulldown
nFAULT 18 16 O Fault indication pin Pulled logic low with fault condition; open-drain output requires an external pullup
BDECAY 19 17 I Decay mode setting pins Set the decay mode for bridge B; see Decay Modes; tri-level pin
ADECAY 20 18 Set the decay mode for bridge A; see Decay Modes; tri-level pin
TRQ1 26 24 I Torque DAC current scalar Scales the current by 100%, 75%, 50%, or 25%; internal pulldown
TRQ0 27 25
PAD PAD PAD PWR Thermal pad Must be connected to ground

DRV8881E PH/EN Pin Functions

PIN TYPE DESCRIPTION
NAME PWP RHR
BEN 21 19 I Bridge B enable input Logic high enables bridge B; logic low disables the bridge Hi-Z
BPH 22 20 I Bridge B phase input Logic high drives current from BOUT1 → BOUT2
AEN 23 21 I Bridge A enable input Logic high enables bridge A; logic low disables the bridge Hi-Z
APH 24 22 I Bridge A phase input Logic high drives current from AOUT1 → AOUT2
ATE 25 23 I Smart tune enable pin Logic high enables smart tune operation; when logic low, the decay mode is set through the DECAYx pins; smart tune must be pulled high prior to power-up or coming out of sleep, or else tied to V3P3 in order to enable smart tune; internal pulldown; see Smart tune

DRV8881P PWM Pin Functions

PIN TYPE DESCRIPTION
NAME PWP RHR
BIN2 21 19 I Bridge B PWM input Logic controls the state of H-bridge B; internal pulldown
BIN1 22 20
AIN2 23 21 I Bridge A PWM input Logic controls the state of H-bridge A; internal pulldown
AIN1 24 22
PARA 25 23 I Parallel mode input Logic high enables parallel mode

External Components

COMPONENT PIN 1 PIN 2 RECOMMENDED
CVM1 VM GND 0.1-µF ceramic capacitor rated for VM per VM pin
CVM1 VM GND Bulk electrolytic capacitor rated for VM, recommended value is 100 µF, see Bulk Capacitance Sizing
CVCP VCP VM 16 V, 0.47 µF ceramic capacitor
CSW CPH CPL 0.1-µF X7R capacitor rated for VM
CV3P3 V3P3 GND 6.3 V, 0.47-µF ceramic capacitor
RnFAULT VMCU(1) nFAULT > 5 kΩ
RAISEN AISEN GND Optional sense resistor, see Sense Resistor
RBISEN BISEN GND
(1) VMCU is not a pin on the DRV8881, but a supply voltage pullup is required for open-drain output nFAULT; nFAULT may be pulled up to V3P3