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• BLDC Motor Flash MCU( ❋ Items in this solution Δ Other related products )
  Part Number VDD IO / ADC Interface TIMER ROM/RAM/EEP CLOCK OCP/Comp. PACKAGE
  HT66FM5230 4.5 ~ 5.5V 18 / 10bitx6 I²C 4 2K / 256 / 32 20MHz HIRC 1 / 3 16NSOP/20SSOP
HT66FM5240 4.5 ~ 5.5V 26 / 12bitx8 I²C / UART 5 4K / 256 / 64 20MHz HIRC 1 / 3 20/28SSOP
  HT45FM30 3.3 ~ 5.5V 18 / 10bitx5 - 3 2K / 192 / 64 16MHz HIRC - / 4 16/20TSSOP
  HT45FM2C 3.3 ~ 5.5V 28 / 10bitx9 - 8 4K / 256 / 128 20MHz HIRC - / 2 16NSOP/28SOP/
28SSOP/44LQFP
  HT45FM03B 4.5 ~ 5.5V 26 / 12bitx8 - 2 4K / 192 / - 12/16/20 HIRC - / 1 28SOP
• Tiny PowerTM LDO( ❋ Items in this solution Δ Other related products )
  Part Number Maximum Input Voltage Output Voltage Output Current Tolerance Current Consumption Protections Package
  HT75xx-1 30V 2.1~4.4V 100mA ±3% 2.5uA Soft-Start TO92
SOT23-5
SOT89
5.0~12V 150mA
  HT75xx-2 2.1~4.4V 100mA ±1%
5.0~12V 150mA
  HT75xx-3 2.1~4.4V 100mA ±2% 1.0uA
5.0~12V 150mA
HT75xx-7 2.1~4.4V 100mA 2.5uA Soft-Start
OCP
OTP
5.0~12V 150mA
• Integrated Power MOSFET Buck Type AC to DC LED Lighting ( ❋ Items in this solution Δ Other related products )
  Part Number Topology Power MOSFET RDS(on) Output Power Frequency OTHERS Operating Current PACKAGE
  HT7A6312 Flyback 730V 19Ω 8W/13W 60KHz UVLO, OTP, OVP, OCP, open/Short 0.7mA 8SOP
  HT7A6322 Flyback 730V 12Ω 12W/20W 60KHz UVLO, OTP, OVP, OCP, open/Short 0.7mA 8SOP

Compared with traditional fan products, DC energy saving fans use brushless motor control technology, which provides the advantages of longer product life, controllable air speed and improved power savings, greatly enhancing the value and competitiveness of such products.

One of Holtek’s DC Brushless Motor Control Flash MCUs, the HT66FM5240, is specifically directed at single-phase and three-phase Brushless DC Motor control applications. This device fully supports square wave and sinusoidal wave generation solutions. Among these, square wave control can support Hall Sensor and Sensor-less control methodologies. As Brushless DC Motor control operation requires the processing of feedback signals for protection against over current and over voltage situations, this Holtek device includes integrated protection circuits along with an A/D converter, which are used together to ensure smooth rotational control as well as implementing the necessary protection features.

To help users develop related products rapidly, Holtek has provided a block diagram, application circuits, PCB layout, component list and other technical information. For more details, click on “Learn more about our solutions”.

1

Application Areas

Single-phase/three-phase DC brushless motor energy saving fans, motor drive control, industrial fans, etc.

2

Power saving and quiet running

this device includes integrated protection circuits along with an A/D converter, which are used together to ensure smooth rotational control as well as implementing the necessary protection features.

3

Full range of protection mechanisms

over current protection and over voltage protection, extends product lifecycle, controls the air speed and for power saving.

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System Architecture and Connection Diagram

This application solution provides a highly integrated DC Brushless Motor Fan reference design using a minimum of external components. The solution includes power circuit, Intelligent Power Module (IPM) circuit, voltage regulator circuit, Hall Sensor current detect circuit, etc.

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