Smart Home Audio(325)


KA44370A is a gate driver IC for driving single-phase motors. The output stage, which can directly drive an external power MOSFET at 48V, is assembled in a small 4mm x 4mm QFN package, making it possible to mount the IC on a small motor despite the 48V requirement. The motor current waveform can be selected from a sinusoidal or a trapezoidal wave, which is generated by our unique Auto Phase Control technology, achieving low power consumption, low vibration and high airflow with high-speed rotation. A2PRaS (Advanced Auto Phase & Rapid Softswitch) function is also installed which allows the setting of advanced phase in order to achieve even higher speed rotation. It provides optimal motor drive control for a variety of applications. Stable and reliable motor start-up is possible even in the case of mutual interference when multiple fan motors are used, or when reverse rotation takes place due to external airflow.


PDF iconData Sheet

Item Performance characteristics
Sub-Family Description Single-phase BLDC motor driver
Control Method A2PRaS, PWM Sinusoidal control
Control interface PWM/DC
Ron (Ohm) Pre-Dr
Operating Voltage (V) 12V / 24V / 48V

Operating ambient temperature[min](°C)


Operating ambient temperature[max](°C)

Package QFN32L 4x4mm Body
Lead Pitch_0.4mm




Recommended Circuit






Support tool

We provide information, evaluation tools, etc. to support your design. Please feel free to contact us.

 Evaluation Board

KE-KA44370A  - KA44370A single-phase PWM/VSP motor evaluaton board

The KE-KA44370A is an evaluation board (EVB) equipped with pre-driver KA44370A, and external MOSFET drivers. It is capable of driving a single-phase brushless DC (BLDC) motor with 1.3A Peak current in 48V DC rails or battery powered applications.

This EVB can be used to verify the functionality of our original technology : Advanced Auto Phase & Rapid Softswitch (A2PRaS) installed in KA44370A.

PDF iconUser Manual



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