The ZXBM1004 is a single-chip, self-oscillating brushless DC (BLDC) motor driver manufactured by Zetex Semiconductors (now Diodes Incorporated). It's designed for low-voltage, low-power BLDC motor applications, integrating all the necessary control and drive circuitry into a single IC.

Applications

• Cooling fans: CPU coolers, case fans, and graphics card coolers.
• Small pumps: Miniature fluid pumps for various applications.
• Toy motors: Driving small motors in toys and hobby projects.
• Portable devices: Fans and motors in handheld devices.
• Instrumentation: Small BLDC motors in measurement equipment.

Features

• Single-chip solution: Integrates all necessary control and drive circuitry.
• Self-oscillating design: Eliminates the need for external Hall sensors.
• Low voltage operation: Operates from a low voltage supply (typically 1.8V to 5.5V).
• High efficiency: Minimizes power consumption.
• Built-in protection features: Includes over-current protection and thermal shutdown.
• Soft start: Reduces inrush current during startup.

Benefits

• Simplified circuit design: The single-chip solution simplifies circuit design and reduces component count.
• Reduced cost: Eliminates the need for external Hall sensors and other components.
• Improved efficiency: The self-oscillating design and low voltage operation minimize power consumption.
• Enhanced reliability: Built-in protection features protect the motor and driver from damage.
• Compact size: The small package size allows for use in space-constrained applications.

Additional Details

The ZXBM1004 typically provides a maximum output current of a few hundred milliamperes. The operating frequency is determined by external components. The device is available in various small packages, such as SOT23 and DFN. The operating temperature range is typically -40°C to +85°C. It typically uses a simple control scheme based on back-EMF sensing.