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IPM1781 — BLDC Ceiling Fan Driver Module

PCBA DESIGN · OEM / ODM

IPM1781 is a field-oriented control (FOC) driver PCBA for three-phase brushless DC fans and ceiling fans, with a 24 V DC supply and 125 W power specification. Integrate the board with a matched motor, supply, control panel and enclosure. Motor parameters, startup, blade load and cooling affect performance; validate continuous power and temperature rise in the intended system.

24 V DC | 125 W Specification | FOC | Three-Phase BLDC

IPM1781 — BLDC Ceiling Fan Driver Module

Board views and ceiling fan application

Key Features

  • Field-oriented control for three-phase BLDC fan motors
  • 24 V DC supply and 125 W specification; validate continuous operation under actual loads
  • Five main terminals: VDD, U, V, W and GND
  • SPEED, FNR, BREAK and STOP control markings; definitions depend on the project
  • RXD and TXD debug markings; confirm protocol, levels and baud rate
  • Agreed control configuration, prototype commissioning and system matching

Technical Specifications

Technical Specifications
ModelIPM1781 BLDC Fan Driver PCBA
Supply24 V DC; never connect directly to AC mains
Power specification125 W; validate continuous operation and temperature rise with the motor, fan load and cooling
ControlFOC, Field-Oriented Control
MotorThree-phase BLDC fan and ceiling fan motors; match ratings, pole pairs and target speed
Components shownIPM1781 controller; AP07F741 MOSFETs in the illustrated TO-252 version
Main connectionsVDD: 24 V positive; GND: negative; U / V / W: motor phases. Follow actual board markings and approved drawings
ControlsSPEED: speed; FNR: direction; BREAK: brake; STOP: stop. Confirm input modes, ranges, active levels and timing in the project interface specification
Auxiliary and debug5V / GND / RXD / TXD / NC. Confirm 5V direction and current capacity, serial protocol and levels; leave NC unconnected unless specified
Mechanical dataUse approved drawings for outline, holes, component heights and terminal sizes; images are not dimensional drawings
ProtectionOvercurrent, stall, overtemperature and undervoltage protection are not verified features; confirm availability, triggers and recovery with the supplied hardware and firmware

Integration and delivery

Provide motor specifications or samples, pole pairs, target speed, blade load, speed and start/stop controls, supply conditions, installation space and quantity. Confirm interfaces and firmware before power-off checks, current-limited power-up, low-speed testing and gradual load testing. Recheck temperature rise and repeated starts in the final enclosure. Do not connect 24 V to low-level signal ports or power the 5V terminal before confirming its direction. Motor, complete ceiling fan, supply, cables and enclosure are included only as agreed in the order.

Applications

  • Three-phase BLDC ceiling fan integration
  • 24 V brushless DC fan control systems
  • Fan manufacturer prototype matching and OEM/ODM projects

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