Three-Phase Sensorless BLDC Motor Control Chip
Brand: Princeton TechnologyVoltage Range: 9V ~ 28V
Integrated PNMOS pre-driver
180° sine wave current operation
PWM or VSP input open-loop control
PWM, VSP or CLK input closed-loop control
Maximum speed limit and angle compensation setting
Lock-rotor protection, current limiting and overcurrent protection functions
Applications: Three-phase sensorless BLDC motor drive, small fans, water pumps, circulating fans, pedestal fans, bathroom heater fans, fan lights, etc.
Application Scenarios
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Product Description

Overview of PT2504

PT2504 is an integrated three-phase sensorless BLDC motor control chip that can directly drive external PNMOS. It is equipped with advanced protection functions, including a soft-start circuit, lock-rotor protection and output current limiting.
PT2504 adopts sine wave current control to reduce electromagnetic noise during operation, making it suitable for high-efficiency fan motor drive applications. In terms of speed control, PT2504 supports open-loop control; besides open-loop control, it can also achieve closed-loop control through parameter configuration. Utilizing BCD manufacturing process, PT2504 only requires a single VDD power supply and a minimal number of external components.
Packaged in TSSOP24, this chip delivers excellent energy efficiency, making it an ideal solution for compact, cost-effective and sensorless BLDC motor drive systems.



Functional Block Diagram:



Applications of PT2504

  • Three-phase sensorless BLDC motor drive

  • Small fans

  • Water pumps

  • Circulating fans

  • Pedestal fans

  • Bathroom heater fans

  • Fan lights



Product Features
  • Operating Voltage Range: 9V ~ 28V

  • Integrated PNMOS Pre-driver

  • 180° Sine Wave Current Operation

  • PWM or VSP Input for Open-loop Control

  • PWM, VSP or CLK Input for Closed-loop Control

  • Maximum Speed Limit and Angle Compensation Configuration

  • Lock-rotor Protection, Current Limiting and Overcurrent Protection Functions

  • FG Speed Signal Output Configuration