SLOSE48 December   2020 DRV8434A

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1. 5.1 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 Indexer Timing Requirements
      1. 6.6.1 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 Stepper 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 Microstepping Indexer
      4. 7.3.4 Controlling VREF with an MCU DAC
      5. 7.3.5 Current Regulation and Decay Mode
        1. 7.3.5.1 Smart tune Ripple Control
        2. 7.3.5.2 Blanking Time
      6. 7.3.6 Charge Pump
      7. 7.3.7 Linear Voltage Regulators
      8. 7.3.8 Logic Level, tri-level and quad-level Pin Diagrams
        1. 7.3.8.1 nFAULT Pin
      9. 7.3.9 Protection Circuits
        1. 7.3.9.1 VM Undervoltage Lockout (UVLO)
        2. 7.3.9.2 VCP Undervoltage Lockout (CPUV)
        3. 7.3.9.3 Overcurrent Protection (OCP)
        4. 7.3.9.4 Stall Detection
        5. 7.3.9.5 Open-Load Detection (OL)
        6. 7.3.9.6 Thermal Shutdown (OTSD)
        7.       Fault Condition Summary
    4. 7.4 Device Functional Modes
      1. 7.4.1 Sleep Mode (nSLEEP = 0)
      2.      43
      3. 7.4.2 Disable Mode (nSLEEP = 1, ENABLE = 0)
      4. 7.4.3 Operating Mode (nSLEEP = 1, ENABLE = Hi-Z/1)
      5. 7.4.4 nSLEEP Reset Pulse
      6.      Functional Modes Summary
  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 Stepper Motor Speed
        2. 8.2.2.2 Current Regulation
        3. 8.2.2.3 Decay Mode
        4. 8.2.2.4 Application Curves
        5. 8.2.2.5 Thermal Application
          1. 8.2.2.5.1 Power Dissipation
          2. 8.2.2.5.2 Conduction Loss
          3. 8.2.2.5.3 Switching Loss
          4. 8.2.2.5.4 Power Dissipation Due to Quiescent Current
          5. 8.2.2.5.5 Total Power Dissipation
          6. 8.2.2.5.6 Device Junction Temperature Estimation
  9. 9 Power Supply Recommendations
    1. 9.1 Bulk Capacitance
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Support 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

5.1 Pin Functions

PINI/OTYPEDESCRIPTION
NAMENO.
HTSSOPVQFN
AOUT14, 53OOutputWinding A output. Connect to stepper motor winding.
AOUT26, 74OOutputWinding A output. Connect to stepper motor winding.
PGND3, 122, 7—PowerPower ground. Connect to system ground.
BOUT28, 95OOutputWinding B output. Connect to stepper motor winding
BOUT110, 116OOutputWinding B output. Connect to stepper motor winding
CPH2823—PowerCharge pump switching node. Connect a X7R, 0.022-µF, VM-rated ceramic capacitor from CPH to CPL.
CPL2722
DIR2419IInputDirection input. Logic level sets the direction of stepping; internal pulldown resistor.
ENABLE2520IInputLogic low to disable device outputs; logic high to enable device outputs; Hi-Z to enable 8x torque count scaling.
DVDD1510—PowerLogic supply voltage. Connect a X7R, 0.47-μF to 1-μF, 6.3-V or 10-V rated ceramic capacitor to GND.
GND149—PowerDevice ground. Connect to system ground.
VREF1712IInputCurrent set reference input. Maximum value 3.3 V. DVDD can be used to provide VREF through a resistor divider.
M01813IInputMicrostepping mode-setting pins. Sets the step mode.
M12217
STL_MODE2116IInput

Pin input level programs the stall detection mode:

0 = Torque count mode, torque count analog voltage is output on the TRQ_CNT/STL_TH pin.

Hi-Z = Learning mode, learning result analog voltage is output on the TRQ_CNT/STL_TH pin.

1 = Stall threshold mode, stall threshold is set by an input voltage on the TRQ_CNT/STL_TH pin.

Tied to ground with a 330k resistor = Stall detection disabled.

TRQ_CNT/STL_TH2015I/OInput/OutputTorque count analog output or stall threshold analog input depending on STL_MODE pin input level. A 1nF capacitor must be connected from this pin to ground.
STEP2318IInputStep input. A rising edge causes the indexer to advance one step; internal pulldown resistor.
VCP124—PowerCharge pump output. Connect a X7R, 0.22-μF, 16-V ceramic capacitor to VM.
VM2, 131, 8—PowerPower supply. Connect to motor supply voltage and bypass to PGND with two 0.01-µF ceramic capacitors (one for each pin) plus a bulk capacitor rated for VM.
STL_REP1914OOpen DrainStall fault report output. Requires a pullup resistor. A low to high transition indicates a stall. A high to low transition indicates a successful learning. If this pin is connected to ground, stall fault reporting is disabled.
nFAULT1611OOpen DrainFault output. Pulled logic low when a fault is detected; open-drain output. Requires a pullup resistor.
nSLEEP2621IInputSleep mode control. Logic high to enable device; logic low to enter low-power sleep mode; internal pulldown resistor. An nSLEEP low pulse clears faults.
PAD----Thermal pad. Connect to system ground.