800mA BTL线性控制风扇马达驱动芯片800mA BTL Linear Fan Motor Driver CXMD3269是一款用于单相无刷直流马达的驱动芯片。作为HALL IC和单相直流无刷马达的接口，它通过BTL线性控制输出对马达进行驱动，具有低导通压降、低噪声、高效率的特点。CXMD3269内置线性控制模式、风扇转速输出、锁定保护、自动重启以及热关断等功能，并能为Hall IC提供

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       CXMD3269是一款用于单相无刷直流马达的驱动芯片。作为HALL IC和单相直流无刷马达的接口，它通过BTL线性控制输出对马达进行驱动，具有低导通压降、低噪声、高效率的特点。CXMD3269内置线性控制模式、风扇转速输出、锁定保护、自动重启以及热关断等功能，并能为Hall IC提供偏置。当输出电压由低到高或由高到低变化时，线性控制模式会根据转速快慢调整其变化斜率，使马达能应用在对静音和可靠性要求较高的电子设备中。如果马达在运转过程中被卡住，过驱动电流会引起温度升高而损坏马达。为防止此现象，马达卡住时CXMD3269会切断驱动电流，几秒钟后再尝试恢复驱动。风扇转动时RD为低电平，停转时为高电平。FG为转速输出，HB为Hall偏置。CXMD3269 is a single-phase full wave DC fan motor driver. It is used as an interface between a HALL IC and a single coil brushless motor. With its BTL linear control and low saturation output stages, CXMD3269 silently and efficiently drives a fan motor. The functions built in CXMD3269 are linear control drive mode, fan tachometer, lock detection, automatic restart, Hall Bias and thermal shutdown. When output voltage changes from L to H (or H to L), linear control mode gently drives the output stage. This makes CXMD3269suitable for the electronics equipment which required low noise and high reliability. If the motor is stalled by the external force, overdrive current may incur coil overheat or burning. To prevent this, the lock detection circuit shuts off the driver. The automatic restart circuit resumes powering up the driver after a few seconds. Rotation detection open drain output is pulled down when a motor runs. FG is the Fan tachometer output, and HB provides bias supply for a Hall sensor.

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• 线性控制，单相全波驱动wi1嘉泰姆

• 宽应用电压1.8V～13.8Vwi1嘉泰姆

• 低导通压降（0.5V @ 250mA）</p>

• FG转速检测输出</p>

• 锁定检测，自动重启wi1嘉泰姆

RD低电平正常运转，高电平锁定</p>

• 1.5V Hall偏置wi1嘉泰姆

• 热关断保护</p>

• MSOP-10封装wi1嘉泰姆

• 符合RoHS规范及Pb-Freewi1嘉泰姆

􀁺 Linear Control for Single-Phase Full Wave Drivewi1嘉泰姆

􀁺 Wide Input Range 1.8V~13.8Vwi1嘉泰姆

􀁺 Low Saturation Output Voltage 0.5V @250mAwi1嘉泰姆

􀁺 FG Tachometer Outputwi1嘉泰姆

􀁺 Lock Detection, Automatic Restartwi1嘉泰姆

- RD = L when Rotation; RD = H when Stopwi1嘉泰姆

􀁺 1.5V Hall Biaswi1嘉泰姆

􀁺 Thermal Shutdown Protectionwi1嘉泰姆

􀁺 Available in MSOP-10 Packagewi1嘉泰姆

􀁺 RoHS Compliant and 100% Lead (Pb)-Freewi1嘉泰姆

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