CXMD3281该器件包括一个片内霍尔电压、一个施密特触发器（Schmitt触发器）和两个互补的开集电极驱动器（open-collector drivers），用以补偿霍尔灵敏度的温度漂移。它还包括一个内部带隙稳压器，用于为内部电路提供偏置电压。将该装置置于可变磁场中，如果磁通密度大于防喷器阈值，则将销DO调低（开），销DOB调高（关）。这种输出状态一直保持到磁通密度反转并低于BRP，然后使DO被调高（关）和DOB被调低（开）。CXMD3281在TO-94（SIP-4L）封装中提供。CXMD3281是一个集成霍尔传感器，带有输出驱动器，设计用于无刷直流电机应用的电子换流。
片上霍尔传感器
3.5V至20V电源电压
300mA（平均）输出汇电流
反向供电电压保护
工作温度-20℃至85℃
低剖面TO-94（SIP-4L）封装
高ESD等级
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[ CXMD3281 ]"
目录
7.相关产品
产品概述 返回TOP
The device includes an on-chip Hall voltage, a Schmitt trigger to provide switching hysteresis for noise rejection, a temperature compensation circuit to compensate the temperature drift of Hall sensitivity and two complementary open-collector drivers for sinking large load current. It also includes an internal band-gap regulator which is used to provide bias voltage for internal circuits. Placing the device in a variable magnetic field, if the magnetic flux density is larger than threshold BOP, the pin DO will be turned low (on) and pin DOB will be turned high (off). This output state is held until the magnetic flux density reverses and falls below BRP, then causes DO to be turned high (off) and DOB turned low(on). CXMD3281 is available in TO-94(SIP-4L) package.The CXMD3281 is an integrated Hall sensor with output driver designed for electronic commutation of brush-less DC motor applications.
产品特点 返回TOP
On-Chip Hall Sensor
3.5V to 20V Supply Voltage
300mA (avg) Output Sink Current
Reversed Supply Voltage Protection
-20℃ to 85℃ Operating Temperature
Low Profile TO-94 (SIP-4L) Package
High ESD Rating
应用范围 返回TOP
Dual-Coil Brush-less DC Motor
Dual-Coil Brush-less DC Fan
Revolution counting
Speed measurement
技术规格书（产品PDF) 返回TOP
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产品封装图 返回TOP
电路原理图 返回TOP
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| 直流风扇马达驱动 | ||||||
| 产品系列名 | 输入电压范围（V） | 输出电流（mA） | 工作点Bop（GS） | 管耗（MW） | 工作温度 | 封装形式 |
| CXMD3280 | 3.8～24 | 350 | -35 | 2 | -40~85 | T094 |
| CXMD3281 | 3.8～24 | 350 | -35 | 2 | -40~85 | T094 |
| CXMD3282 | 3.5～20 | 350 | 33 | 2 | -40~85 | T094 |
