DC Energy Saving Upright Fan ‒ Sine-wave Control HT66FM5230 Characteristics BLDCM ASSP Flash MCU : HT66FM5230 Human Machine Interface (HMI) : VR controls speed Power : adaptor – input AC 100V ~ 240V, output DC 24V Solutions ◆ ◆ ◆ ◆ ◆ Power : DC 8V / 12V / 24V Motor drive control : SVPWM Sine-wave Control Hall Sensor Solution Motor speed control : VR stepless speed control Speed : 200rpm ~ 1000rpm PCBA : semicircle single panel solution, low cost, best cost performance PCBA solution VR HMI 24V DC Motor : U, V, W HT66FM5230 Hall : H1, H2, H3 MOS : U1, U2, U3 System Block Diagram HT66FM5230 : 3-Phase_BLDCM_Hall Solution (VB = 24V / 12V / 8V)