SY21604HHC - Three Phase Sensorless Sine Wave Motor Driver with Integrated Power MOSFETs


  • Power Supply Voltage Range from 5V to 40V
  • Integrated Three Half-H-Bridge Motor Driver
  • Low MOSFET on-Resistance: HS + LS < 250mΩ
  • Maximum Drive Current of 2A RMS, 3A Peak Current
  • Sensorless or Single Hall Sensor/Element Control
  • Sine Wave Driver
  • Integrated 5V or 3.3V Buck Regulator
  • I2C Interface
  • Speed Setting: PWM/ Analog/I2C
  • Forward/Reverse Control
  • Sleep Mode
  • Over Current Protection
  • Motor Lock Protection
  • Under Voltage Protection
  • Thermal Shutdown
  • TSSOP24E Package

Typical Application


The SY21604 is designed for sensorless control of three-phase brushless DC (BLDC) motor, especially for low noise, low external component count and high efficiency applications. The SY21604 also integrates three half-H-bridges, which have low turn on resistances. A 180° modified SPWM is used for reducing the motor noise and torque ripple. The device can be easily configured through an I2C interface to drive different motors.

The SY21604 provides several protections and abnormal state detections to ensure reliable operation of the motor.  Such as over current protection, short circuit protection, under voltage lockout, thermal shutdown and abnormal motor states protection. A low-power sleep mode is also provided.

To be compatible with industry-standard devices, the SY21604 package is 24-pin TSSOP24E


  • Appliance Fan
  • HVAC