SMSC公司的EMC2305是多转速5风扇PWM控制器,SMBus2.0兼容,每个风扇驱动器由可编程频率的PWM驱动器和风扇速度控制算法来控制,高速PWM频率26kHz,低速PWM频率从9.5Hz到2240Hz,基于RPM的控制算法从500RPM到16kRPM(外接晶振)的精度为0.5%,从500RPM到16kRPM(内部时钟)的精度为1%,可用于服务器,投映仪,工业和网络设备以及笔记本电脑.本文介绍了EMC2305的主要特性,方框图以及EMC2305参考设计电路图.EMC2305:MultipleRPM-BasedPWMFanControll
SMSC 公司的EMC2305是多转速5风扇PWM控制器, SMBus 2.0兼容,每个风扇驱动器由可编程频率的PWM驱动器和风扇速度控制算法来控制,高速PWM频率26kHz,低速PWM频率从9.5Hz到2240Hz,基于RPM的控制算法从500 RPM 到
16k RPM(外接晶振)的精度为0.5%,从500 RPM 到16k RPM(内部时钟)的精度为1%,可用于服务器,投映仪,工业和网络设备以及
笔记本电脑.本文介绍了EMC2305的主要特性,方框图以及EMC2305参考设计电路图.
EMC2305: Multiple RPM-B
ased PWM Fan Controller for Five Fans
The EMC2305 is an SMBus compliant fan controller with up to five independently controlled PWM fan drivers. Each fan driver is controlled by a programmable frequency PWM driver and Fan Speed Control algorithm that operates in either a closed loop fashion or as a directly PWM-controlled device.
The closed loop Fan Speed Control algorithm (
FSC) has the capability to detect aging fans and alert the system. It will likewise detect and stalled or locked fans and trigger an interrupt.
