SLOSEC6 August   2024 DRV8434A-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
    1. 4.1 Pin Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 STEP and DIR Timing Requirements
      1. 5.6.1 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Stepper Motor Driver Current Ratings
        1. 6.3.1.1 Peak Current Rating
        2. 6.3.1.2 RMS Current Rating
        3. 6.3.1.3 Full-Scale Current Rating
      2. 6.3.2 PWM Motor Drivers
      3. 6.3.3 Microstepping Indexer
      4. 6.3.4 Controlling VREF with an MCU DAC
      5. 6.3.5 Current Regulation and Decay Mode
        1. 6.3.5.1 Smart tune Ripple Control
        2. 6.3.5.2 Blanking time
      6. 6.3.6 Charge Pump
      7. 6.3.7 Linear Voltage Regulators
      8. 6.3.8 Logic Level, Tri-Level and Quad-Level Pin Diagrams
        1. 6.3.8.1 nFAULT and STL_REP Pin
      9. 6.3.9 Protection Circuits
        1. 6.3.9.1 VM Undervoltage Lockout (UVLO)
        2. 6.3.9.2 VCP Undervoltage Lockout (CPUV)
        3. 6.3.9.3 Overcurrent Protection (OCP)
        4. 6.3.9.4 Stall Detection
        5. 6.3.9.5 Open-Load Detection (OL)
        6. 6.3.9.6 Thermal Shutdown (OTSD)
        7.       Fault Condition Summary
    4. 6.4 Device Functional Modes
      1. 6.4.1 Sleep Mode (nSLEEP = 0)
      2.      43
      3. 6.4.2 Disable Mode (nSLEEP = 1, ENABLE = 0)
      4. 6.4.3 Operating Mode (nSLEEP = 1, ENABLE = Hi-Z/1)
      5. 6.4.4 nSLEEP Reset Pulse
      6.      Functional Modes Summary
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Stepper Motor Speed
        2. 7.2.2.2 Current Regulation
        3. 7.2.2.3 Decay Mode
        4. 7.2.2.4 Application Curves
        5. 7.2.2.5 Thermal Application
          1. 7.2.2.5.1 Power Dissipation
          2. 7.2.2.5.2 Conduction Loss
          3. 7.2.2.5.3 Switching Loss
          4. 7.2.2.5.4 Power Dissipation Due to Quiescent Current
          5. 7.2.2.5.5 Total Power Dissipation
          6. 7.2.2.5.6 Device Junction Temperature Estimation
  9. 8 Power Supply Recommendations
    1. 8.1 Bulk Capacitance
  10. 9 Layout
    1. 9.1 Layout Guidelines
    2. 9.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

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

5.5 Electrical Characteristics

Typical values are at TA = 25°C and VVM = 24 V. All limits are over recommended operating conditions, unless otherwise noted.
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
POWER SUPPLIES (VM, DVDD)
IVMVM operating supply currentENABLE = 1, nSLEEP = 1, No motor load56.5mA
IVMQVM sleep mode supply currentnSLEEP = 024μA
tSLEEPSleep timenSLEEP = 0 to sleep-mode

120

μs
tRESETnSLEEP reset pulsenSLEEP low to clear fault

20

40

μs
tWAKEWake-up timenSLEEP = 1 to output transition0.71.2ms
tONTurn-on timeVM > UVLO to output transition0.71.2ms

tEN

Enable time

ENABLE = 0/1 to output transition

1

ms
VDVDDInternal regulator voltageNo external load, 6V < VVM < 48V4.7555.25V
No external load, VVM = 4.5V

4.2

4.4

V

CHARGE PUMP (VCP, CPH, CPL)
VVCPVCP operating voltage6V < VVM < 48VVVM + 5V
f(VCP)Charge pump switching frequencyVVM > UVLO; nSLEEP = 1390kHz
LOGIC-LEVEL INPUTS (STEP, DIR, nSLEEP)
VILInput logic-low voltage00.6V
VIHInput logic-high voltage1.55.5V
VHYSInput logic hysteresis150mV
IILInput logic-low currentVIN = 0 V–11μA
IIHInput logic-high currentVIN = 5 V100μA
TRI-LEVEL INPUTS (M0, ENABLE)
VI1Input logic-low voltageTied to GND00.6V
VI2Input Hi-Z voltageHi-Z1.822.2V
VI3Input logic-high voltageTied to DVDD2.75.5V
IOOutput pull-up current10.5μA
QUAD-LEVEL INPUT (M1, STL_MODE)
VI1Input logic-low voltageTied to GND00.6V
VI2330kΩ ± 5% to GND11.251.4V
VI3Input Hi-Z voltageHi-Z1.822.2V
VI4Input logic-high voltageTied to DVDD2.75.5V
IILOutput pull-up current10.5μA
TORQUE COUNT INPUT/ STALL THRESHOLD OUTPUT (TRQ_CNT/STL_TH)
VO1Output low voltageSTL_MODE = 0V0.2V
VO2Output High voltageSTL_MODE = 0V2.3V
VI1Input low voltageSTL_MODE = DVDD0.2V
VI2Input High voltageSTL_MODE = DVDD2.3V
NBITTorque-count DAC Resolution

12

Bits
CLOADTRQ_CNT/STL_TH pin Capacitive LoadRLOAD = Infinite, Phase margin = 45°1nF
ISHORTTRQ_CNT/STL_TH pin short-circuit currentFull scale output shorted to GND

3

mA
CONTROL OUTPUTS (nFAULT, STL_REP)
VOLOutput logic-low voltageIO = 5 mA0.5V
IOHOutput logic-high leakage–11μA
VILInput logic-low voltageSTL_REP, pulled low to disable stall reporting00.6V
VIHInput logic-high voltageSTL_REP, pulled high to enable stall reporting1.55.5V
MOTOR DRIVER OUTPUTS (AOUT1, AOUT2, BOUT1, BOUT2)
RDS(ON)High-side FET on resistanceTJ = 25 °C, IO = -1 A165200mΩ
TJ = 125 °C, IO = -1 A240300mΩ
TJ = 150 °C, IO = -1 A260350mΩ
RDS(ON)Low-side FET on resistanceTJ = 25 °C, IO = 1 A165210mΩ
TJ = 125 °C, IO = 1 A240300mΩ
TJ = 150 °C, IO = 1 A260350mΩ
tSROutput slew rateVVM = 24 V, IO = 1 A, Between 10% and 90%240V/µs
PWM CURRENT CONTROL (VREF)
KVTransimpedance gain

VREF = 3.3 V

1.2541.321.386V/A

IVREF

VREF Leakage Current

VREF = 3.3 V

8.25

μA
ΔITRIPCurrent trip accuracy0.25 A < IO < 0.5 A–1212%
0.5 A < IO < 1 A–6

6

1 A < IO < 2.5 A–4

4

IO,CHAOUT and BOUT current matchingIO = 2.5 A–2.52.5%
PROTECTION CIRCUITS
VUVLOVM UVLO lockoutVM falling, UVLO falling4.14.24.35V
VM rising, UVLO rising4.24.34.45
VUVLO,HYSUndervoltage hysteresisRising to falling threshold120mV
VCPUVCharge pump undervoltageVCP falling; CPUV reportVVM + 2V
IOCPOvercurrent protectionCurrent through any FET4A
tOCPOvercurrent deglitch time2μs
tRETRYOvercurrent retry time4ms
tOLOpen load detection time65ms
IOLOpen load current threshold100mA
TOTSDThermal shutdownDie temperature TJ150165180°C
THYS_OTSDThermal shutdown hysteresisDie temperature TJ20°C