AH9279中文资料Two Phase 5V/12V BLDC All-In-One Fan and Motor Driver with Output Zener Clamp数据手册Diodes规格书

描述 Description

The AH9279 is a most advanced fan control and
drive Hall IC manufactured by special CMOS
process. This IC consists of voltage reference, Hall
sensor, signal amplifier, wave shaping circuit, locked
rotor detector, locked rotor protection and restart
circuit, output drive circuit, etc.. To allow survival in
a harsh environment and in consideration of low cost,
the AH9279 has been designed with many functions
internally, and requires less external components.

When there is no motion for one second, the IC will
detect locked rotor conditions, enter protection mode
automatically and disable two outputs for five
seconds. Then, it will turn on drive current from one
channel for one second. If it still fails to detect fan
rotation, the AH9279 will shut off the outputs for five
seconds again. This sequence will be repeated until
rotation condition is detected and the IC enters
normal operation mode. This function prevents the
chip from overheating and damage due to long time
locked rotor.

The power dissipation decides allowable maximum
ambient temperature. Low power dissipation of
AH9279 and the output MOSFET power transistor
enable it to be used at ambient temperature up to
125°C on condition that the drive power is lower than
100mW or drive current is less than 200mA.

特性 Features

On Chip Hall SensorBuilt-in Zener Diodes Protection for Output
DriverPower Efficient CMOS and Power MOSFET
Drivers Allow 400mA Without Overheating5V and 12V OperationHigh Sensitivity for Switching SymmetryLocked Rotor Shutdown and Auto RestartESD Rating: 4000V(Human Body Model)
400V(Machine Model)

应用 Application

Dual-coil Brushless DC Fan

简介

AH9279属于集成电路（IC）的电机驱动器控制器。由制造生产的AH9279电机驱动器，控制器产品属于电机驱动器和控制器电源管理集成电路 (PMIC) 系列，可用于控制或操作从某电源施加到电机或相关机电执行器的电源。所实现的具体功能和特性集根据预期负载和预期应用的特性有很大差异，范围从用于有刷电机的简单开环速度控制到基于步进电机的高级闭环运动控制。