SLLSFT3B November   2025  – November 2026 MC121-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and 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 I2C Timing Requirements
    7. 5.7 Timing Diagrams
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Motor Control
        1. 6.3.1.1 Duty Input
        2. 6.3.1.2 Duty Curve
        3. 6.3.1.3 Motor Start, Speed Change, and Stop
        4. 6.3.1.4 Open-Loop (Duty Cycle) Control
        5. 6.3.1.5 Closed-Loop (Speed) Control
        6. 6.3.1.6 Commutation
          1. 6.3.1.6.1 Hall Sensor
            1. 6.3.1.6.1.1 Field Direction Definition
            2. 6.3.1.6.1.2 Internal Hall Latch Sensor Output
          2. 6.3.1.6.2 Hall Offset
          3. 6.3.1.6.3 Square Commutation
          4. 6.3.1.6.4 Soft Commutation
        7. 6.3.1.7 PWM Modulation Modes
      2. 6.3.2 Protections
        1. 6.3.2.1 Locked Rotor Protection
        2. 6.3.2.2 Current Limit
        3. 6.3.2.3 Overcurrent Protection (OCP)
        4. 6.3.2.4 VM Undervoltage Lockout (UVLO)
        5. 6.3.2.5 VM Over Voltage Protection (OVP)
        6. 6.3.2.6 Thermal Shutdown (TSD)
        7. 6.3.2.7 Integrated Supply (VM) Clamp
    4. 6.4 Device Functional Modes
      1. 6.4.1 Active Mode
      2. 6.4.2 Sleep and Standby Mode
      3. 6.4.3 Fault Mode
      4. 6.4.4 Test Mode and One-Time Programmable Memory
    5. 6.5 Programming
      1. 6.5.1 I2C Communication
        1. 6.5.1.1 I2C Read
        2. 6.5.1.2 I2C Write
  8. 7 Register Map
    1. 7.1 USR_OTP Registers
    2. 7.2 USR_TM Registers
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 External Components
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
      1. 8.3.1 Bulk Capacitance
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
    5. 8.5 Hall Element Position
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

1 Features

  • AEC-Q100 qualified for automotive applications
    • Temperature Grade-1 : –40°C ≤ TA ≤ 125°C
  • N-channel H-bridge driver with internal Hall sensor
  • Functional Safety Quality-Managed
    • Documentation available to aid functional safety system design
  • RDS(ON): 850mΩ (HS+LS)
  • Current rating
    • Configurable current limit up to 1.21A
    • 0.5A rms (TA = 105oC, RθJA = 100oC/W)
  • Integrated supply (VM) clamp
  • Configurable speed curve and starting duty cycle
  • Commutation schemes: square or soft (up to 90o)
    • Square: maximum torque/speed
    • Soft: optimized speed and acoustics
  • Configurable speed reference input: PWM or DC
    • Input PWM frequency range: 20Hz to 90kHz
    • Input DC voltage range: (0-3)V
  • Configurable output PWM frequency: 25 or 50kHz
  • Closed loop speed control accuracy: ±3%
  • PWM dithering to reduce EMI
  • Configurable soft start time
  • Configurable hall offset angle and time
  • Speed output with 0.5x, 1x, 2/3x, or 2x multipliers
  • Rotor lock detection and fault output (RD)
  • Configurable PWM modes
    • Hybrid, synchronous, and asynchronous
  • Auto-demag for high efficiency across speed
  • One-time programming (2 pages) over I2C
  • Protection features
    • Output Overcurrent protection with auto-restart
    • Locked rotor protection (LRP) with auto-restart
    • VM undervoltage lockout (UVLO)
    • VM overvoltage protection (OVP)
    • Thermal shutdown (TSD)
    • Configurable fault retry time
  • Functional features (Operation continues)
    • when FG/RD shorts GND
    • when PWM/DC shorts to VM