MC33039 3 Phase Brushless DC Motor Controller IC SOP-8

MC33039 3 Phase Brushless DC Motor Controller IC SOP-8 is a specialized high-performance adapter designed to provide closed-loop speed control for brushless DC (BLDC) motor systems. This integrated circuit functions by processing the three sensor rotor position information from Hall Effect sensors to produce a constant amplitude output pulse train. Consequently, the device enables precise speed regulation even under varying load conditions without the need for complex digital processing. Furthermore, the MC33039 allows engineers to implement an economical velocity feedback loop by converting commutated sensor signals into a DC voltage proportional to the motor speed. Therefore, you can achieve highly stable motor performance in compact industrial and consumer applications by integrating this SOP-8 package into your drive electronics.

Key Features:

• Closed-Loop Speed Control: The IC provides a dedicated solution for maintaining precise motor velocity regardless of fluctuations in voltage or mechanical load.
• Internal Monostable Timer: It features a built-in timer that generates a fixed-width pulse for every transition of the Hall sensor inputs.
• Wide Supply Voltage Range: The device operates reliably across a broad power spectrum, making it versatile for various battery-powered and industrial systems.
• High-Current Output: The output driver can source or sink sufficient current to interface directly with frequency-to-voltage converters or error amplifiers.
• Space-Saving SOP-8 Package: Its surface-mount footprint minimizes PCB real estate, which is vital for modern, compact motor drive modules.

Technical Specifications:

• Supply Voltage (V_CC): 5.5 V to 15 V
• Output Pulse Width: Adjustable via external Resistor (R_T) and Capacitor (C_T)
• Input Threshold Voltage: Typical 2.2 V (Compatible with standard Hall Effect sensors)
• Operating Current (I_CC): ≈ 3.0 mA to 5.5 mA
• Output High Voltage: V_CC − 1.5 V (minimum)
• Operating Temperature Range: −40°C to +85°C

Mechanical Specifications:

• Package Type: SOP-8 (Small Outline Package)
• Mounting Style: Surface Mount Technology (SMT)
• Lead Finish: Matte Tin / Lead-Free (RoHS Compliant)
• Case Material: Molded Plastic (UL 94 V-0 Flammability Rating)

Dimensions:

• Body Length: ≈ 4.9 mm
• Body Width: ≈ 3.9 mm (Excluding leads)
• Total Width: ≈ 6.0 mm (Including leads)
• Height: ≈ 1.75 mm
• Lead Pitch: 1.27 mm (Standard SOP spacing)

Pinout and Wiring:

• Pin 1, 2, 3 (Sensor Inputs A, B, C): Connect these pins to the outputs of the motor Hall Effect sensors to detect rotor position.
• Pin 4 (GND): Connect to the common system ground (0 V).
• Pin 5 (Output): This pin provides the pulse train output; however, you must filter this signal to create a DC feedback voltage.
• Pin 6 (C_T): Connect an external timing capacitor to define the pulse width duration.
• Pin 7 (R_T): Connect an external timing resistor to set the discharge current for the timer.
• Pin 8 (V_CC): Positive power supply input.

Datasheet Reference:

• Download ON Semiconductor MC33039 Datasheet

Commonly Used in:

• BLDC Motor Drivers: Acting as the feedback element in high-efficiency brushless motor controllers.
• Industrial Fan Controllers: Ensuring constant airflow by regulating fan RPM against backpressure changes.
• Power Tool Electronics: Providing steady torque and speed maintenance in cordless drills and saws.

Applications:

• Precision Velocity Loops: Implementing closed-loop speed regulation without using an expensive tachometer.
• Pumps and Compressors: Managing motor speed to maintain consistent fluid or air pressure.
• Automotive Accessories: Controlling electric fuel pumps or HVAC blowers in vehicle systems.

Equivalent Models:

• MC33035: A complementary brushless motor controller that often works alongside the MC33039 for full system management.
• NXP MC33039: The same functional part produced by NXP, consequently sharing the same pinout and electrical parameters.
• LM2907 / LM2917: While these are frequency-to-voltage converters, they can perform similar speed-to-voltage tasks in certain motor circuits.

Package Includes:

• 1 x MC33039 3 Phase Brushless DC Motor Controller IC SOP-8