SLVSI46 July   2025 DRV8818A

ADVANCE INFORMATION  

  1.   1
  2. 1Features
  3. 2Applications
  4. 3Description
  5. 4Pin Configuration and Functions
  6. 5Specifications
    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 Timing Requirements
    7.     13
    8. 5.7 Typical Characteristics
  7. 6Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 PWM H-Bridge Drivers
      2. 6.3.2 Current Regulation
      3. 6.3.3 Decay Mode
      4. 6.3.4 Microstepping Indexer
      5. 6.3.5 Protection Circuits
        1. 6.3.5.1 Overcurrent Protection (OCP)
        2. 6.3.5.2 Thermal Shutdown (TSD)
        3. 6.3.5.3 Undervoltage Lockout (UVLO)
    4. 6.4 Device Functional Modes
      1. 6.4.1 Sleep Mode
      2. 6.4.2 Disable Mode
      3. 6.4.3 Active Mode
  8. 7Application 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 VREF and RSENSE
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
      1. 7.3.1 Bulk Capacitance
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
        1. 7.4.1.1 Heat Sinking
      2. 7.4.2 Layout Example
      3. 7.4.3 Thermal Considerations
        1. 7.4.3.1 Power Dissipation
  9. 8Device and Documentation Support
    1. 8.1 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
    6. 8.6 Documentation Support
      1. 8.6.1 Related Documentation
  10.   Mechanical, Packaging, and Orderable Information

5.5 Electrical Characteristics

Typical values are at TA = 25°C. All limits are over recommended operating conditions, unless otherwise noted.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
POWER SUPPLIES
IVM VM operating supply current VM = 35V, fPWM < 50kHz 7 10 mA
IVCC VCC operating supply current fPWM < 50kHz 0.4 4 mA
IVMQ VM sleep mode supply current VM = 35V 3 20 μA
IVCCQ VCC sleep mode supply current 0.5 20 μA
VUVLO VM undervoltage lockout voltage VM rising 6.7 7.5 V
VCC undervoltage lockout voltage VCC rising 2.75 2.95
VREF INPUT/CURRENT CONTROL ACCURACY
IREF VREF input current VREF = 3.3V -3 3 μA
ΔICHOP Chopping current accuracy VREF = 2.0V, 70% to 100% current -5 5 %
VREF = 2.0V, 20% to 56% current -10 10
LOGIC-LEVEL INPUTS
VIL Input low voltage 0.3 × VCC V
VIH Input high voltage 0.7 × VCC V
VHYS Input hysteresis 300 mV
IIL Input low current VIN = 0.3 × VCC -20 20 µA
IIH Input high current VIN = 0.7 × VCC, all CONTROL pins except SLEEPn -20 20 µA
IIH_SLEEPn Input high current on SLEEPn pin VIN = 0.7 × VCC, SLEEPn pin -60 60 µA
RPU Pullup resistance ENABLEn, RESETn 1 MΩ
RPD Pulldown resistance DIR, STEP, USM1, USM0, SRn 1 MΩ
RPD_SLEEPn Pulldown resistance on SLEEPn pin SLEEPn 100 kΩ
HOMEn OUTPUT
VOL Output low voltage IO = 200μA 0.3 × VCC V
VOH Output high voltage  IO = -200μA 0.7 × VCC V
DECAY INPUT
VIL Input low threshold voltage For fast decay mode 0.21 × VCC V
VIH Input high threshold voltage For slow decay mode 0.6 × VCC V
H-BRIDGE FETS
RDS(onH) High-side MOSFET on resistance TA = 25°C, VVM = 24V, IO = 2.5A 180 300 mΩ
TA = 85°C, VVM = 24V, IO = 2.5A 220
TA = 150°C, VVM = 24V, IO = 2.5A 280
RDS(onL) Low-side MOSFET on resistance TA = 25°C, VVM = 24V, IO = 2.5A 130 210 mΩ
TA = 85°C, VVM = 24V, IO = 2.5A 160
TA = 150°C, VVM = 24V, IO = 2.5A 190
ILEAK Output leakage current to ground in Disable mode VVM = 35V, OUTx = GND 4400 μA
tOFF PWM off-time Rx = 56kΩ, Cx = 680pF 31 40 49 μs
PWM off-time in Smart Tune Dynamic Decay mode RCA = GND, RCB = GND 32 μs
RCA = GND, RCB = High-Z 16
tBLANK Pulse duration, STEP high Rx = 56kΩ, Cx = 680pF 800 1000 1300 ns
tDT Dead time SRN = 0 50 475 800 ns
tR Rise time 10 80 ns
tF Fall time 10 80 ns
PROTECTION CIRCUITS
TTSD Thermal shutdown temperature Die temperature 150 160 180 °C
IOCP OCP protection level 3.5 A
tOCP OCP deglitch time 1.5 µs
tRETRY OCP retry time 800 µs