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MC121-Q1
  • MC121-Q1

MC121-Q1

PREVIEW

Automotive, 40-V, 1-A peak single-phase BLDC Motor Driver with integrated hall sensor

Texas Instruments MC121-Q1 Product Info

1 April 2026 0

Parameters

Rating

Automotive

Architecture

Integrated FET

Vs (min) (V)

3.3

Vs ABS (max) (V)

40

Operating temperature range (°C)

-40 to 125

Package

SOT-23-THN (DYM)-6-11.02 mm² 2.9 x 3.8

Features

  • AEC-Q100 qualified for automotive applications
    • Temperature Grade-1 : –40°C ≤ TA ≤ 125°C
  • N-channel H-bridge driver with internal Hall sensor
  • 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: 20 Hz to 90 kHz
    • 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 output (RD)
  • Configurable PWM modes
    • Synchronous, asynchronous and hybrid
  • Auto-demag for high efficiency across speed
  • One-time programming (2 pages) over I2C
  • Protection features
    • Overcurrent protection for short between VM/GND and OUTx
    • Locked rotor protection (LRP) with auto-restart
    • VM undervoltage lockout (UVLO)
    • VM overvoltage protection (OVP)
    • Thermal shutdown (TSD)
    • Configurable fault retry time
  • Functional features (Opeartion continues)
    • when short between FG/RD and GND
    • 100% input during short between PWM/DC and VM
  • AEC-Q100 qualified for automotive applications
    • Temperature Grade-1 : –40°C ≤ TA ≤ 125°C
  • N-channel H-bridge driver with internal Hall sensor
  • 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: 20 Hz to 90 kHz
    • 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 output (RD)
  • Configurable PWM modes
    • Synchronous, asynchronous and hybrid
  • Auto-demag for high efficiency across speed
  • One-time programming (2 pages) over I2C
  • Protection features
    • Overcurrent protection for short between VM/GND and OUTx
    • Locked rotor protection (LRP) with auto-restart
    • VM undervoltage lockout (UVLO)
    • VM overvoltage protection (OVP)
    • Thermal shutdown (TSD)
    • Configurable fault retry time
  • Functional features (Opeartion continues)
    • when short between FG/RD and GND
    • 100% input during short between PWM/DC and VM

Description

The MC121-Q1 is a 40V, 850mΩ rated motor driver with integrated N-channel full-bridge, charge pump, Hall sensor, commutation control logic, and protection circuitry for single phase brushless DC motors. The Hall sensor provides rotor position information to the commutation logic to maintain continuous rotor motion. The commutation logic can be programmed for square and soft PWM waveforms to reduce acoustic noise or maximize speed/efficiency.

The duty cycle of a pulse-width modulated signal or a (0-3)V DC voltage on the PWM/DC pin controls the motor speed. FG/RD pin can be configured to report the motor speed or a locked rotor condition to an external controller. The PWM/DC and FG/RD pins can be temporarily configured as an I2C interface to support a programming (OTP) mode to configure the OTP during production.

The MC121-Q1 integrates protection features for motor and device protection. These include supply undervoltage lockout, overvoltage protection, output overcurrent protection, device overtemperature shutdown, and locked rotor protection.

The MC121-Q1 is available in two 6-pin packages: SOT23-FL and X2SON. SOT23-FL is a flat lead package with a maximum height of 1.1mm. X2SON is a non-leaded package with a max. height of 0.4mm.

The MC121-Q1 is a 40V, 850mΩ rated motor driver with integrated N-channel full-bridge, charge pump, Hall sensor, commutation control logic, and protection circuitry for single phase brushless DC motors. The Hall sensor provides rotor position information to the commutation logic to maintain continuous rotor motion. The commutation logic can be programmed for square and soft PWM waveforms to reduce acoustic noise or maximize speed/efficiency.

The duty cycle of a pulse-width modulated signal or a (0-3)V DC voltage on the PWM/DC pin controls the motor speed. FG/RD pin can be configured to report the motor speed or a locked rotor condition to an external controller. The PWM/DC and FG/RD pins can be temporarily configured as an I2C interface to support a programming (OTP) mode to configure the OTP during production.

The MC121-Q1 integrates protection features for motor and device protection. These include supply undervoltage lockout, overvoltage protection, output overcurrent protection, device overtemperature shutdown, and locked rotor protection.

The MC121-Q1 is available in two 6-pin packages: SOT23-FL and X2SON. SOT23-FL is a flat lead package with a maximum height of 1.1mm. X2SON is a non-leaded package with a max. height of 0.4mm.

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