MCT8316A Texas Instruments Integrated Circuit (Quad Flat No-Lead) In Stock
Texas Instruments MCT8316A is a sensorless trapezoidal BLDC motor driver with integrated FETs supporting up to 8 A peak phase current and 4.5 V to 35 V supply in a compact QFN package. From $3.50 in stock worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Quad Flat No-Lead
- Pin Count
- 41
- Lifecycle
- ACTIVE
- Datasheet
- MCT8316A Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Sensorless trapezoidal (6-step) commutation algorithm eliminates Hall-effect sensors, reducing system cost by 3 components and simplifying BLDC motor mechanical assembly
- Integrated power MOSFETs capable of up to 8 A peak phase current and 4.5 V to 35 V input supply enable direct drive of sub-50 W BLDC motors without external gate drivers or discrete FETs
- Hardware-configurable speed and protection thresholds via analog input pins allow closed-loop speed control and overcurrent protection without a dedicated microcontroller firmware update
Applications
The MCT8316A drives sensorless BLDC motors in power tools, cooling fans, pumps, and home appliances where eliminating Hall sensors reduces wiring complexity and improves reliability in dusty or wet environments. Its 4.5 V to 35 V input range and 8 A peak current capability suit 12 V to 24 V brushless motor systems found in robotic vacuum cleaners, e-bike pedal-assist units, and industrial conveyor drives. Designers targeting compact, single-board motor controllers benefit from integrating gate driver and FETs in a single QFN package, reducing PCB area and thermal management complexity.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for MCT8316A:
Frequently Asked Questions
What supply voltage range and peak phase current does the MCT8316A support for BLDC motor drive applications?
The MCT8316A operates from a 4.5 V to 35 V supply and delivers up to 8 A peak phase current through its integrated power MOSFETs, covering 12 V and 24 V BLDC motor systems up to approximately 50 W without any external gate-driver ICs or discrete FETs on the power stage.
How does sensorless commutation in the MCT8316A eliminate Hall-effect sensors, and what motor types benefit most?
The MCT8316A uses back-EMF zero-crossing detection to perform trapezoidal (6-step) commutation without Hall sensors, removing 3 sensor ICs, their pull-up resistors, and the associated wiring harness, which benefits axial-flux and outer-rotor BLDC motors in fans and pumps where mounting Hall sensors inside the motor is mechanically impractical.
Can the MCT8316A control motor speed without a microcontroller, and what interface is used to set speed?
Yes — the MCT8316A accepts an analog voltage or PWM duty-cycle signal on its speed-command input pin to set target RPM, and hardware-configurable resistor or pin-strap options set acceleration ramp, braking mode, and current-limit threshold, enabling standalone operation at a fixed duty cycle without any firmware-running host processor for simple fan or pump speed profiles.
What protection features does the MCT8316A integrate to safeguard the motor and power stage during fault conditions?
The MCT8316A includes overcurrent protection with a configurable threshold up to 8 A, undervoltage lockout activating below 4.5 V, thermal shutdown triggered at approximately 150°C junction temperature, and motor lock detection with automatic restart, all of which latch or auto-recover to protect both the integrated FETs and the 35 V-rated motor winding insulation.
How does the MCT8316A compare to a discrete gate-driver plus external FET solution in terms of PCB area and BOM complexity?
The MCT8316A integrates a 3-phase gate driver and 6 power MOSFETs in a single QFN package under 5 mm x 5 mm, replacing at least 7 discrete components (1 gate-driver IC + 6 FETs) that would occupy roughly 150 mm² on a 2-layer board, resulting in over 60% PCB area saving and reducing solder joint count by more than 40 joints, which improves production yield in high-volume assembly.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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