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EUM6801

更新时间: 2024-10-28 11:44:51
品牌 Logo 应用领域
德信 - EUTECH 驱动器风扇传感器电机
页数 文件大小 规格书
1页 137K
描述
3-Phase Sensorless Fan Motor Driver

EUM6801 数据手册

  
EUM6801  
3-Phase Sensorless Fan Motor Driver  
DESCRIPTION  
FEATURES  
EUM6801 is a 3-phase sensorless fan motor driver. It  
senses the BEMF (Back Electromotive Force) of the  
motor in rotation and provides corresponding  
commutation current to the motor. The sensorless  
technology doesn’t need Hall sensors. The absence of  
the Hall sensor makes the fabrication of the motor  
easier, especially suitable for ultra-small motors.  
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3-Phase Sensorless Drive Function  
(No Hall Sensor Needed)  
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Few External Components  
(3 CAP Only)  
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Low Startup Voltage: <1.8V  
PWM Speed Control and Soft Switching  
20μA Low Standby Current  
Built in FG Outputs  
EUM6801 integrates PWM speed control, soft  
switching, lock protection, auto restart, fan tachometer  
and forward/reverse functions.  
Built in Thermal Protection  
As applying 3-phase driver method, PWM mode  
controls fan speed by adjusting duty cycle of PWM  
signal. Internal soft switching function drives fan  
motor in low noise and low vibration ways. EUM6801  
can drive motor from stop mode to rotation mode by  
adjusting the external capacitor between OSC pin and  
GND pin. If a motor is stalled by external force or  
obstacles, over-driving current may incur coil overheat  
and burning. To prevent motor from overheating, the  
lock protection circuit shuts down the internal power  
devices for a few seconds after the motor lock is  
detected. Then the auto restart circuit resumes to power  
up the internal power devices. If the lock still persists,  
EUM6801 shuts down power devices for another few  
seconds. The lock protection time is built-in and need  
no external components. During rotation, FG outputs  
signal which represents motor speed. The motor  
rotation direction is controlled by setting FR to high or  
low.  
UDFN Small Package with Thermal Pad  
(3mm×3mm×0.5mm for Small Fan)  
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RoHS Compliant and 100% Lead (Pb)-Free  
Halogen-Free  
APPLICATIONS  
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NB Fan, Low Noise Fan and Low Power  
Consumption Fan  
Application Circuit  
Figure 1.  
DS6801 Ver1.1 Dec. 2010  
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