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Application circuit for high-voltage brushless DC motor fan drive

Block Diagram
Block Diagram


  • Brushless motor controller IC TC78B041FNG is used for fan motor control.
  • High Voltage 3-phase motor driver IC TPD4204F is used for fan motor drive.
  • Hall elements (HU/HV/HW) are mounted on the bottom side of the board.


  • The board is designed to a doughnut shape according to the fan form.
  • Brushless DC motor controller IC TC78B041FNG and high Voltage 3-phase motor driver IC TPD4204F are mounted on the board.
  • Built-in regulator circuit, protection feature and detection function in IC help to simplify peripheral circuit design.

Reference design files

Design, Document

“Design・Document” contains the documents listed below.

Name Date

Toshiba items

Part Number Device Category Quantity Description


Brushless DC Motor Controller IC


  • Incorporating "Intelligent Phase Control" secures high-level efficiency for a wide range of rotation speeds without any need for phase adjustment.
  • Use of a sine wave drive system with a smooth current waveform reduces noise, and generates less noise and vibration than motors with a rectangular wave drive system.


High Voltage 3-phase motor driver IC


  • High Voltage 3-phase brushless DC motor driver fabricated by high voltage MOSFET(600 V).
  • Included over-current and under-voltage protection and shutdown, and thermal shutdown.


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