SLVS997G October   2009  – October 2015 DRV8812

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and 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 Diagram
    3. 7.3 Feature Description
      1. 7.3.1 PWM Motor Drivers
    4. 7.4 Device Functional Modes
      1. 7.4.1 Bridge Control
      2. 7.4.2 Current Regulation
      3. 7.4.3 Decay Mode
      4. 7.4.4 Blanking Time
      5. 7.4.5 nRESET and nSLEEP Operation
      6. 7.4.6 Protection Circuits
        1. 7.4.6.1 Overcurrent Protection (OCP)
        2. 7.4.6.2 Thermal Shutdown (TSD)
        3. 7.4.6.3 Undervoltage Lockout (UVLO)
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Current Regulation
        2. 8.2.2.2 Decay Modes
        3. 8.2.2.3 Sense Resistor
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
    1. 9.1 Bulk Capacitance
    2. 9.2 Power Supply and Logic Sequencing
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Thermal Consideration
      1. 10.3.1 Thermal Protection
      2. 10.3.2 Power Dissipation
      3. 10.3.3 Heatsinking
  11. 11Device and Documentation Support
    1. 11.1 Third-Party Products Disclaimer
    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
DRV8812 po_lvs997.gif
RHD Package
28-Pin VQFN
Top View
DRV8812 po_rhd_slvs997.gif

Pin Functions

PIN I/O(1) DESCRIPTION EXTERNAL COMPONENTS
OR CONNECTIONS
NAME PWP RHD
POWER AND GROUND
GND 14, 28 3, 17 - Device ground
VMA 4 7 - Bridge A power supply Connect to motor supply (8.2-V to 45-V). Both pins must be connected to the same supply, bypassed with a 0.1uF capacitor to GND, and connected to appropriate bulk capacitance.
VMB 11 14 - Bridge B power supply
V3P3OUT 15 18 O 3.3-V regulator output Bypass to GND with a 0.47-μF 6.3-V ceramic capacitor. Can be used to supply VREF.
CP1 1 4 IO Charge pump flying capacitor Connect a 0.01-μF 50-V capacitor between CP1 and CP2.
CP2 2 5 IO Charge pump flying capacitor
VCP 3 6 IO High-side gate drive voltage Connect a 0.1-μF 16-V ceramic capacitor and a 1-MΩ resistor to VM.
CONTROL
AENBL 21 24 I Bridge A enable Logic high to enable bridge A
APHASE 20 23 I Bridge A phase (direction) Logic high sets AOUT1 high, AOUT2 low
AI0 24 27 I Bridge A current set Sets bridge A current: 00 = 100%,
01 = 71%, 10 = 38%, 11 = 0
AI1 25 28 I
BENBL 22 25 I Bridge B enable Logic high to enable bridge B
BPHASE 23 26 I Bridge B phase (direction) Logic high sets BOUT1 high, BOUT2 low
BI0 26 1 I Bridge B current set Sets bridge B current: 00 = 100%,
01 = 71%, 10 = 38%, 11 = 0
BI1 27 2 I
DECAY 19 22 I Decay mode Low = slow decay, open = mixed decay,
high = fast decay
nRESET 16 19 I Reset input Active-low reset input initializes internal logic and disables the H-bridge outputs
nSLEEP 17 20 I Sleep mode input Logic high to enable device, logic low to enter low-power sleep mode
AVREF 12 15 I Bridge A current set reference input Reference voltage for winding current set. Can be driven individually with an external DAC for microstepping, or tied to a reference (e.g., V3P3OUT). A 0.01-µF bypass capacitor to GND is recommended.
BVREF 13 16 I Bridge B current set reference input
STATUS
nFAULT 18 21 OD Fault Logic low when in fault condition (overtemp, overcurrent)
OUTPUT
ISENA 6 9 IO Bridge A ground / Isense Connect to current sense resistor for bridge A
ISENB 9 12 IO Bridge B ground / Isense Connect to current sense resistor for bridge B
AOUT1 5 8 O Bridge A output 1 Connect to motor winding A
AOUT2 7 10 O Bridge A output 2
BOUT1 10 13 O Bridge B output 1 Connect to motor winding B
BOUT2 8 11 O Bridge B output 2
(1) Directions: I = input, O = output, OZ = tri-state output, OD = open-drain output, IO = input/output