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MC121-Q1

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

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Data sheet

MC121-Q1

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Data sheet Order now

Product details

Rating Automotive Architecture Integrated FET Vs (min) (V) 3.3 Vs ABS (max) (V) 40 Operating temperature range (°C) -40 to 125
Rating Automotive Architecture Integrated FET Vs (min) (V) 3.3 Vs ABS (max) (V) 40 Operating temperature range (°C) -40 to 125
SOT-23-THN (DYM) 6 11.02 mm² 2.9 x 3.8 X2SON (DEZ) 6 5 mm² 2.5 x 2
  • 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

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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* Data sheet MC121-Q1 Automotive 40V , Single Phase BLDC Driver with Integrated Hall Sensor datasheet PDF | HTML 20 Nov 2025

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

MCF8316DEVM — MCF8316D evaluation module

The MCF8316D evaluation module (EVM) enables users to evaluate the performance of the MCF8316D motor driver. The EVM includes an onboard FTDI chip to convert USB communication, from the micro-USB connector, into UART. An onboard MSP430FR2355 microcontroller (MCU) translates the UART communication (...)

User guide: PDF | HTML
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GUI for evaluation module (EVM)

MOTORSTUDIO — Motor Studio GUI for tuning and evaluating BLDC motor drivers

Motor Studio is an easy-to-use graphical user interface (GUI) that simplifies the tuning process of our brushless DC (BLDC) motor drivers to reduce device evaluation and product development time. The GUI allows users to quickly spin up their motors and optimize various stages of motor operation to (...)

Supported products & hardware

Supported products & hardware

Products
Integrated control BLDC drivers
MCF8315A — 40-V max, 4-A peak, sensorless FOC control three-phase BLDC motor driver MCF8315C — 40V max, 4A peak, sensorless field-oriented control (FOC) three-phase BLDC motor driver MCF8315C-Q1 — Automotive, 40V max, 4A peak, sensorless field-oriented control (FOC) three-phase BLDC motor driver MCF8315D — 40V (max) 4A (peak), sensorless FOC three-phase BLDC motor driver with UL-recognized variant MCF8316A — 40-V max, 8-A peak, sensorless FOC control 3-phase BLDC motor driver MCF8316C-Q1 — Automotive, 40-V max, 8-A peak, sensorless field oriented control (FOC) 3-phase BLDC motor driver MCF8316D — 40V (max) 8A (peak), sensorless FOC three-phase BLDC motor driver with UL-recognized variant MCF8329A — 60-V, sensorless, field-oriented control (FOC) three-phase BLDC gate driver MCF8329A-Q1 — Automotive, 12V and 24V, sensorless, field-oriented control (FOC) three-phase BLDC gate driver MCF8329HS-Q1 — Automotive, 12V and 24V, sensorless field-oriented control (FOC) three-phase BLDC gate driver MC121-Q1 — Automotive, 40-V, 1-A peak single-phase BLDC Motor Driver with integrated hall sensor
Hardware development
Evaluation board
MCF8315EVM — MCF8315 evaluation module for three-phase sensorless FOC integrated MOSFET BLDC motor driver MCF8315PWPEVM — MCF8315 evaluation module for 24-pin plastic small-outline package (PWP) MCF8316AEVM — MCF8316 evaluation module for three-phase sensorless FOC integrated MOSFET BLDC motor driver MCF8316DEVM — MCF8316D evaluation module MCF8329EVM — MCF8329 evaluation module for 60-V, sensorless FOC three-phase BLDC gate driver MCF8329RRYEVM — MCF8329A-Q1 evaluation module for 32-pin WQFN package MCF8329HSRRYEVM — MCF8329HS evaluation module
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SOT-23-THN (DYM) 6 Ultra Librarian
X2SON (DEZ) 6 Ultra Librarian
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