MCT8316A - 40V, 8A Sensorless BLDC Driver | Texas Instruments
MPN: MCT8316A β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.46 | $34.60 |
| 100 | $2.98 | $298.00 |
| 500 | $2.61 | $1,305.00 |
| 1,000 | $2.35 | $2,350.00 |
Drop-in alternatives for MCT8316A β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
MCT8316Z
β Drop-Inπ Reference alternative (not in catalog)
MCT8316A-Q1
β Drop-Inπ Reference alternative (not in catalog)
MCT8316A1VRGFR
β Drop-Inπ Reference alternative (not in catalog)
MCT8316AT1VRGFR
β Drop-Inπ Reference alternative (not in catalog)
DRV10987
β Drop-Inπ Reference alternative (not in catalog)
DRV10970
β Drop-Inπ Reference alternative (not in catalog)
MCT8316A Maximum Ratings & Electrical Characteristics
| Motor Type | 3-Phase BLDC |
| Control Interface | I2C (MCT8316AV) or Hardware (MCT8316AT) |
| Supply Voltage (VM) | 4.5 V to 40 V |
| Peak Motor Current | 8 A |
| Continuous Motor Current | [DATA_NEEDED: continuous current rating] |
| Control Method | Sensorless Trapezoidal |
| Maximum Electrical Speed | 3 kHz |
| Startup Time | <50 ms |
| Output Drivers | 3x NMOS Half-Bridge |
| RDS(on) (High-Side + Low-Side) | [DATA_NEEDED: RDS(on) value] |
| DAC Outputs | 2x 12-bit, max 3 V |
| Protection Features | UVLO, OCP, OTW, OTSD, AVS |
| Package | VQFN-40 (7x5 mm) |
| Operating Temperature Range | -40C to +125C |
| RoHS Status | Compliant |
MCT8316A Pin Configuration
| Pin 1 | VM β Motor supply voltage |
| Pin 2 | GND β Ground |
| Pin 3 | OUT1 β Phase A output |
| Pin 4 | OUT2 β Phase B output |
| Pin 5 | OUT3 β Phase C output |
| Pin 6 | VCP β Charge pump capacitor connection |
| Pin 7 | VREG β Internal regulator output |
| Pin 8 | SCL β I2C clock (I2C variant) |
| Pin 9 | SDA β I2C data (I2C variant) |
| Pin 10 | DACOUT1 β DAC output 1 |
| Pin 11 | DACOUT2 β DAC output 2 |
| Pin 12 | nFAULT β Fault indicator (active low) |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
MCT8316A is suitable for 6 applications: Power Tools, Drones and UAVs, Robotics, Fans and Pumps, Home Appliances, Automotive (12V/24V systems).
Power Tools
The MCT8316A's 8-A peak current and fast startup (<50 ms) make it ideal for cordless power tools like drills and impact drivers. Its sensorless trapezoidal control eliminates Hall sensors, reducing cost and improving reliability in high-vibration environments. The 40-V rating supports 12- to 24-V battery packs, and the integrated FETs simplify PCB design. With UVLO and OCP protections, the driver ensures safe operation under heavy loads and stall conditions.
Recommended
Drones and UAVs
For drone propulsion, the MCT8316A provides high-speed operation up to 3 kHz electrical frequency, enabling rapid motor response for stable flight. Its small VQFN-40 package and integrated FETs save board space, crucial for weight-constrained designs. The sensorless control reduces component count, and the fast startup time allows quick spool-up of propellers. The device's thermal performance supports continuous operation in demanding flight conditions.
Recommended
Robotics
In robotics, the MCT8316A drives BLDC motors for joint actuation and wheel drives. Its code-free operation simplifies firmware development, while the I2C interface (MCT8316AV) allows real-time tuning and diagnostics via the two 12-bit DACs. The 8-A peak current handles dynamic loads, and the integrated protections prevent damage during stalls. The wide supply range accommodates various battery chemistries.
Recommended
Fans and Pumps
The MCT8316A is well-suited for fans and pumps in HVAC, automotive cooling, and industrial equipment. Its sensorless trapezoidal control provides reliable startup and operation, while the low acoustic noise can be optimized with configurable modulation schemes. The device's 40-V rating supports 24-V systems, and the integrated FETs reduce BOM cost. The hardware interface variant (MCT8316AT) enables standalone operation without a microcontroller.
Recommended
Home Appliances
In home appliances like vacuum robots and washing machines, the MCT8316A offers efficient and quiet motor control. Its fast startup and high-speed capability improve performance, while the code-free operation reduces development time. The I2C interface allows integration with system MCUs for advanced features like speed control and fault reporting. The device's small footprint is ideal for space-constrained designs.
Recommended
Automotive (12V/24V systems)
The MCT8316A-Q1 variant is AEC-Q100 qualified for automotive applications such as electric pumps, fans, and seat adjusters. It operates from 12- to 24-V automotive supplies and provides robust protection against load dump and other transients. The sensorless control eliminates Hall sensors, improving reliability in harsh environments. The device's thermal performance and small package make it suitable for under-hood installations.
Recommended
Recommended Products Summary
Engineering reference data for MCT8316A β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MCT8316Z | MCT8316A-Q1 | DRV10987 |
|---|---|---|---|---|
| Package | VQFN-40 (7x5) | VQFN-40 (7x5) | VQFN-40 (7x5) | VQFN-40 (7x5) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Supply Voltage (VM) | 4.5 V to 40 V | 4.5 V to 40 V | 4.5 V to 40 V | 4.5 V to 40 V |
| Peak Current | 8 A | 8 A | 8 A | 2 A |
| Control Method | Sensorless Trapezoidal | Sensorless Trapezoidal | Sensorless Trapezoidal | Sensorless Sinusoidal |
| Interface | I2C or Hardware | I2C or Hardware | I2C or Hardware | I2C |
| Automotive Grade | No | No | Yes (AEC-Q100) | No |
| DAC Outputs | 2x 12-bit | 2x 12-bit | 2x 12-bit | None |
Key Differentiators
- High-speed operation up to 3 kHz electrical frequency (vs DRV10987)
- 8-A peak current capability (vs DRV10987)
- Automotive-grade option (MCT8316A-Q1) (vs MCT8316Z)
Design Notes
Place a 100-uF electrolytic capacitor and a 0.1-uF ceramic capacitor close to the VM pin to handle peak currents and reduce voltage transients. The MCT8316A can draw up to 8 A peak, so the power supply must be capable of delivering this current without significant voltage droop. Use low-ESR capacitors to minimize ripple.
For optimal thermal performance, solder the exposed thermal pad of the VQFN-40 package to a large copper area on the PCB. Use multiple vias to connect the pad to inner ground planes. Keep motor output traces short and wide to reduce inductance and resistance, which helps minimize voltage spikes during switching.
Do not exceed the absolute maximum supply voltage of 40 V. Ensure the charge pump capacitor is placed close to the VCP pin and has the correct value as specified in the datasheet. For the I2C variant, pull-up resistors on SCL and SDA are required; choose values appropriate for the bus speed and capacitance.
Compliance Information
RoHS compliant per TI product page. AEC-Q100 qualified for MCT8316A-Q1 variant only.
