Although AC motor fans have dominated in the market, brushless DC (BLDC) motor fans also have many advantages and are becoming increasingly popular. BLDC motor fans overcome the challenges of regular (AC induction motor) fans, such as overheating, speed fluctuation, lack of remote control features, and inefficiency. BLDC motor fans have higher energy efficiency, a longer service life, lower power consumption and low noise. These BLDC motors can also provide more than 10 levels of multi-stage speed control or stepless speed regulation.

This design incorporates the RL78/G14 microcontroller with three-phase complementary PWM outputs that are suitable for BLDC motor control. Additionally, the high-performance power and analog system utilizes Renesas DC/DC, op amps, and MOSFETs to ensure the quality and stability of this application.

System Benefits:

  • High-function general-purpose microcontrollers suitable for BLDC motor control
  • High-performance DC/DC, op amps, and MOSFETs for an integrated solution



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Template 1 LED Driver LED Driver LED Driver MOSFET Driver MOSFET Driver MOSFET Driver Current/Speed Feedback Current/Speed Feedback Current/Speed Feedback Hall Sensor Hall Sensor Hall Sensor Connector Arrow Connector Arrow.19 Connector Arrow.20 Remote Control Icon Sheet.22 Sheet.23 Sheet.24 Sheet.25 Sheet.26 Sheet.27 Sheet.28 Sheet.29 Sheet.30 LCD/LED Segment Display Sheet.32 Sheet.33 Sheet.34 Sheet.35 Sheet.36 Sheet.37 Sheet.38 Sheet.39 Sheet.40 Sheet.41 Sheet.42 Sheet.43 Sheet.44 Sheet.45 Sheet.46 Sheet.47 Sheet.48 Sheet.49 Sheet.50 Sheet.51 Sheet.52 Sheet.53 Sheet.54 Sheet.55 Sheet.56 Sheet.57 Sheet.58 Sheet.59 Sheet.60 Sheet.61 ON ON Sheet.62 OFF OFF Sheet.63 Sheet.64 Sheet.65 Sheet.66 Sheet.67 Sheet.68 Sheet.69 Sheet.70 Remote Control Remote Control Remote Control Connector Arrow.72 Touch Key Sheet.74 Sheet.75 Sheet.76 Sheet.77 Sheet.78 Sheet.79 Sheet.80 Sheet.81 Sheet.82 Control Key Control Key Control Key Connector Arrow.84 Connector Arrow.87 Buck Regulator Buck Regulator Buck Regulator AUX Power AUX Power AUX Power Connector Arrow.88 15V 15V 15V 5V 5V 5V Connector Arrow.91 Connector 1.160 Connector Arrow.94 Op Amp Op Amp Op Amp MOSFET x6 MOSFET x6 MOSFET x6 Connector Arrow.98 Connector Arrow.101 15 V 15V 15V Connector Arrow.103 Motor Sheet.105 Sheet.106 M M BLDC BLDC BLDC Connector Arrow.108 Connector Line Connector Arrow.111 Connector Arrow.112 Connector Line.113 Connector Arrow.114 Connector 1.160.115 CN085 CN085 CN085 MCU EP Multi-function block MCU MCU GPIO1 GPIO GPIO GPIO2 GPIO GPIO GPIO3 GPIO GPIO PWM PWM PWM ADC 1 10-bit ADC 10-bit ADC GPIO4 GPIO GPIO
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