MX3212B Motor Driver IC SOP-8

MX3212B Motor Driver IC SOP-8 is a highly integrated, dual-channel H-bridge motor driver specifically engineered to control small DC brush motors in battery-powered applications. This compact integrated circuit utilizes a low-voltage power supply system while maintaining high efficiency through its low on-resistance power MOSFETs. Consequently, it generates minimal heat during operation, which extends the battery life of portable electronic devices. Utilizing an advanced CMOS process, the MX3212B offers a robust solution for driving bidirectional motors with simple logic inputs. Furthermore, the chip includes built-in thermal protection to prevent damage under stall conditions. Therefore, you can implement this driver in space-constrained designs to achieve reliable and precise motor control without the need for complex external circuitry.

Key Features:

• Dual H-Bridge Configuration: The internal architecture allows for independent control of two DC motors or one 4-wire stepper motor in both forward and reverse directions.
• Low Quiescent Current: The IC draws negligible power when in standby mode, which significantly optimizes energy consumption for portable toys and gadgets.
• Integrated Thermal Shutdown: Features a dedicated thermal protection circuit that automatically disables the outputs if the junction temperature exceeds safe limits.
• Low Saturation Voltage: The low internal resistance minimizes voltage drops across the driver, ensuring maximum power delivery to the motor terminals.
• Compact Surface Mount Design: The SOP-8 package facilitates automated assembly and reduces the overall footprint on the printed circuit board.

Technical Specifications:

• Supply Voltage Range (V_CC): 1.8 V to 6.0 V
• Continuous Output Current: ≈ 0.8 A per channel
• Peak Output Current: 1.5 A (Non-repetitive pulse)
• Standby Current: < 0.1 μA (Typical)
• Input Logic High: 2.0 V to V_CC
• Input Logic Low: 0 V to 0.5 V
• Thermal Protection Threshold: ≈ 150°C

Mechanical Specifications:

• Package Type: SOP-8 (Small Outline Package)
• Number of Pins: 8 Pins
• Lead Frame: Alloy 42 or Copper based
• Encapsulation: Molded plastic epoxy (UL 94 V-0 rated)

Dimensions:

• Body Length: ≈ 4.90 mm
• Body Width: ≈ 3.90 mm (Excluding leads)
• Total Width: ≈ 6.00 mm (Including leads)
• Height: ≈ 1.55 mm
• Pin Pitch: 1.27 mm

Pinout and Wiring:

• Pin 1 (OUTA): Connects to the first terminal of the DC motor.
• Pin 2 (VCC): Connects to the positive power supply (1.8V – 6.0V).
• Pin 3 (OUTB): Connects to the second terminal of the DC motor.
• Pin 4 (INA): Logic input to control the direction and speed of the motor.
• Pin 5 (INB): Logic input to control the direction and speed of the motor.
• Pin 6 (GND): Common ground for both power and logic stages.
• Pin 7 & 8: Usually serve as additional ground or output channels depending on the specific internal wiring of the B-variant.
• Wiring Note: However, always ensure that you place a decoupling capacitor near the VCC pin to filter out electrical noise from the motor.

Datasheet Reference:

• Download MX3212 Series Motor Driver Datasheet

Commonly Used in:

• Electronic Toys: Driving small motors in remote-controlled cars, robotic dolls, and moving action figures.
• Smart Door Locks: Powering the small internal actuators used in automated locking mechanisms.
• Portable Fans: Providing efficient speed control for handheld or USB-powered cooling fans.

Applications:

• H-Bridge Motor Control: Facilitating bidirectional rotation of DC brushed motors via PWM signals.
• Precision Actuation: Controlling camera focus motors or lens zoom mechanisms in small electronics.
• Valve Control: Driving small solenoids or fluid valves in automated irrigation or medical dispensers.

Equivalent Models:

• TC6242B: A functionally similar low-voltage motor driver often used as a direct replacement.
• DRV8833 (SOP Version): A dual H-bridge driver with comparable voltage ranges, although pin configurations may vary.
• L9110S: A standard choice for hobbyist electronics that provides similar drive current and logic compatibility.

Package Includes:

• 1 x MX3212B Motor Driver IC SOP-8