SMSC公司的EMC2305是多轉(zhuǎn)速5風(fēng)扇PWM控制器,SMBus2.0兼容,每個(gè)風(fēng)扇驅(qū)動(dòng)器由可編程頻率的PWM驅(qū)動(dòng)器和風(fēng)扇速度控制算法來控制,高速PWM頻率26kHz,低速PWM頻率從9.5Hz到2240Hz,基于RPM的控制算法從500RPM到16kRPM(外接晶振)的精度為0.5%,從500RPM到16kRPM(內(nèi)部時(shí)鐘)的精度為1%,可用于服務(wù)器,投映儀,工業(yè)和網(wǎng)絡(luò)設(shè)備以及筆記本電腦.本文介紹了EMC2305的主要特性,方框圖以及EMC2305參考設(shè)計(jì)電路圖.EMC2305:MultipleRPM-BasedPWMFanControll
SMSC 公司的EMC2305是多轉(zhuǎn)速5風(fēng)扇PWM控制器, SMBus 2.0兼容,每個(gè)風(fēng)扇驅(qū)動(dòng)器由可編程頻率的PWM驅(qū)動(dòng)器和風(fēng)扇速度控制算法來控制,高速PWM頻率26kHz,低速PWM頻率從9.5Hz到2240Hz,基于RPM的控制算法從500 RPM 到
16k RPM(外接晶振)的精度為0.5%,從500 RPM 到16k RPM(內(nèi)部時(shí)鐘)的精度為1%,可用于服務(wù)器,投映儀,工業(yè)和網(wǎng)絡(luò)設(shè)備以及
筆記本電腦.本文介紹了EMC2305的主要特性,方框圖以及EMC2305參考設(shè)計(jì)電路圖.
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.
