目录

1.产品概述       2.产品特点     wHU嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）wHU嘉泰姆

5.产品封装       6.电路原理图  wHU嘉泰姆

7.相关产品wHU嘉泰姆

   产品概述 返回TOPwHU嘉泰姆

    CXMD3265是三相Sensorless风扇马达驱动芯片，通过检测三相马达反电动势实现对马达的换相驱动。采用Sensorless技术后驱动控制不再需要霍尔传感器，这将使马达制造生产更容易，尤其适合马达驱动的小型化。CXMD3265具有PWM调速、换相软切换、锁定保护、自动重启、转速检测、欠压保护和正反转控制功能。CXMD3265通过改变PWM占空比，实现马达转速控制。内置换相软切换实现了风扇运转的低噪声、低抖动。CXMD3265通过外部调节OSC与VSS之间的电容容值，可优化马达启动。当外力或障碍等原因导致电机锁定不转时，过驱动电流可能会引起温度升高而损坏马达。为了防止此类现象，当马达锁死后，锁定保护电路将关断内部功率管，切断马达驱动电流。几秒钟后自动重启电路将尝试重新打开功率管恢复马达驱动，如果锁定状态依然存在，CXMD3265将再次关断驱动电流几秒钟。CXMD3265锁定保护和自动重启时间内置，无需额外元件。正常工作时，FG输出马达转速信号，且可通过设定FR高低电位实现马达的正反转控制。CXMD3265 is a 3-phase sensorless BLDC fan motor driver. It senses the Back Electromotive Force of the motor in rotation and provides corresponding commutation current to the motor. The use of sensorless technology means no Hall sensors are needed. The absence of the Hall sensor makes the fabrication of the motor easier and is especially suitable for ultra-small motors. CXMD3265 integrates PWM speed control, soft switching, lock protection, auto restart, fan tachometer, under voltage lock out circuit and forward/reverse functions. 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. CXMD3265can drive motor from stop mode to rotation mode by adjusting the external capacitor between OSC pin and VSS pin. If a motor is stalled by external force or obstacles, over drive 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, CXMD3265shuts down power devices for another few seconds. The lock protection time is built-in and does not need external components. During rotation, FG outputs motor speed feedback signal. The motor rotation direction can be changed by setting FR to high or low.

   产品特点 返回TOPwHU嘉泰姆

• 三相Sensorless驱动wHU嘉泰姆

• 工作电压1.8V～6.0VwHU嘉泰姆

• RON 小于950mΩwHU嘉泰姆

• 欠压保护wHU嘉泰姆

• PWM调速和换相软切换wHU嘉泰姆

• 外围元件少wHU嘉泰姆

• 20μA待机电流wHU嘉泰姆

• 内置过温保护wHU嘉泰姆

• UDFN-10封装wHU嘉泰姆

• 无铅、无卤wHU嘉泰姆

3-Phase Sensorless DrivewHU嘉泰姆

(No Hall Sensor Needed)wHU嘉泰姆

Input Voltage Range:1.8V~6.0VwHU嘉泰姆

Total Driver H+L RON less than 950m
wHU嘉泰姆

UVLO ProtectionwHU嘉泰姆

PWM Speed Control and Soft SwitchingwHU嘉泰姆

Few External ComponentswHU嘉泰姆

20μA Low Standby CurrentwHU嘉泰姆

Built in TSDwHU嘉泰姆

UDFN Small Package with Thermal PadwHU嘉泰姆

(3mm×3mm×0.5mm for Small Fan)wHU嘉泰姆

RoHS Compliant and 100% Lead (Pb)-FreewHU嘉泰姆

Halogen-FreewHU嘉泰姆

   应用范围 返回TOPwHU嘉泰姆

• 笔记本散热风扇, 低噪声风扇和低功耗风扇wHU嘉泰姆

NB Fan, Low Noise Fan and Low PowerwHU嘉泰姆

Consumption FanwHU嘉泰姆

   技术规格书（产品PDF) 返回TOP wHU嘉泰姆

     需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！wHU嘉泰姆

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产品封装图 返回TOPwHU嘉泰姆

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电路原理图 返回TOPwHU嘉泰姆

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