Datasheet > EUM6801

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

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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.

3-Phase Sensorless Drive Function

(No Hall Sensor Needed)

Few External Components

(3 CAP Only)

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)

RoHS Compliant and 100% Lead (Pb)-Free

Halogen-Free

APPLICATIONS

NB Fan, Low Noise Fan and Low Power

Consumption Fan

Application Circuit

Figure 1.

DS6801 Ver1.1 Dec. 2010

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