AH9479数据手册Diodes中文资料规格书

描述 Description

The AH9479/80/81 is a single chip solution for driving single coil brushless DC motors. It combines a motor driver with a high sensitivity Hall sensor, which simplifies the PCB design and makes the fabrication of small-size motors possible.

When there is no motion about 0.4 second, the IC will automatically detect the locked rotor conditions, and enter protection mode, shutting off the motor driver for 4 seconds. Then, the IC will turn on the motor driver for 0.4 second to detect whether there is rotation condition, if fails, the IC will shut off motor driver for four seconds again. This sequence will be repeated until rotation condition is detected, and the IC enters normal operation. This feature can effectively prevent the IC from overheating and damage due to long-time locked rotor condition. “Soft-switch” is used to reduce the vibration and acoustic noise. Thermal-shutdown protection ensures that the motor driver operates under specified temperature ranges.

特性 Features

Full Bridge DriverHigh Sensitivity Integrated Hall SensorSoft-switching for Low NoiseLow Supply Voltage: 2.5VLocked Rotor Protection and Auto-restartThermal ProtectionOutput Over-current ProtectionShort Circuit Protection

应用 Application

5V/12V Low Noise BLDC Cooling FansLow Voltage / Low Power BLDC MotorsNotebook DC Fans / BlowersAutomotive Low Noise Climate Control FansMicro-motors