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MAX6639

2-Channel Temperature Monitor with Dual, Automatic, PWM Fan-Speed Controller

GeneralDescription TheMAX6639monitorsitsowntemperatureandoneexternaldiode-connectedtransistororthetemperaturesoftwoexternaldiode-connectedtransistors,typicallyavailableinCPUs,FPGAs,orGPUs. Features ?TwoThermal-DiodeInputs ?Upto25kHzPWMOutputFrequency ?Three

MAX6639

2-Channel Temperature Monitor with Dual, Automatic, PWM Fan-Speed Controller

MAX6639

2-Channel Temperature Monitor with Dual, Automatic, PWM Fan-Speed Controller

MAX6639

Evaluation Kit

MAX6639AEE

2-Channel Temperature Monitor with Dual, Automatic, PWM Fan-Speed Controller

GeneralDescription TheMAX6639monitorsitsowntemperatureandoneexternaldiode-connectedtransistororthetemperaturesoftwoexternaldiode-connectedtransistors,typicallyavailableinCPUs,FPGAs,orGPUs. Features ?TwoThermal-DiodeInputs ?Upto25kHzPWMOutputFrequency ?Three

MAX6639ATE

2-Channel Temperature Monitor with Dual, Automatic, PWM Fan-Speed Controller

GeneralDescription TheMAX6639monitorsitsowntemperatureandoneexternaldiode-connectedtransistororthetemperaturesoftwoexternaldiode-connectedtransistors,typicallyavailableinCPUs,FPGAs,orGPUs. Features ?TwoThermal-DiodeInputs ?Upto25kHzPWMOutputFrequency ?Three

MAX6639F

2通道溫度監(jiān)測器，提供雙路、自動PWM風(fēng)扇速度控制器; \n? 兩個熱敏二極管輸入 \n? 高達25kHz的PWM輸出頻率 \n? 三個可選擇的SMBus地址 \n? 本地溫度檢測 \n? 1°C遠程測量溫度精度 \n? 兩個PWM輸出用于風(fēng)扇驅(qū)動(開漏，可上拉至+13.5V) \n? 可編程風(fēng)扇控制 \n? 自動風(fēng)扇旋轉(zhuǎn)確保風(fēng)扇啟動 \n? 受控的轉(zhuǎn)速變化確保平穩(wěn)的風(fēng)扇轉(zhuǎn)速調(diào)節(jié) \n? ±3%風(fēng)扇轉(zhuǎn)速測量精度 \n? 溫度檢測始于POR，具有系統(tǒng)失效保護 \n? /OT和/THERM輸出用于禁止或關(guān)斷控制 \n? 測量溫度高達+150°C \n? MAX6639F針對n = 1.021進行優(yōu)化，實現(xiàn)Penryn兼容;

MAX6639可以監(jiān)視自身溫度和一路外部連接成二極管的晶體管溫度，或兩路外部連接成二極管的晶體管溫度，這種晶體管通常內(nèi)置于CPU、FPGA或GPU。2線串口采用標(biāo)準(zhǔn)的系統(tǒng)管理總線(SMBus?)，可執(zhí)行寫字節(jié)、讀字節(jié)、發(fā)送字節(jié)以及接收字節(jié)命令，以讀取溫度數(shù)據(jù)、設(shè)置報警門限?？稍谌我鈺r刻通過SMBus讀取溫度數(shù)據(jù)，三個可編程報警輸出用于產(chǎn)生中斷、禁止或高溫關(guān)斷信號。\n 內(nèi)部雙路PWM風(fēng)扇轉(zhuǎn)速控制器根據(jù)溫度數(shù)據(jù)可調(diào)節(jié)兩個冷卻風(fēng)扇的轉(zhuǎn)速，系統(tǒng)運行在致冷狀態(tài)時能夠?qū)L(fēng)扇噪聲降至最小，而在功耗上升時還可提供最大的致冷效果。通過風(fēng)扇轉(zhuǎn)速反饋實現(xiàn)速率調(diào)節(jié)，以便控制風(fēng)扇轉(zhuǎn)速，而不僅僅是PWM占空比。速率測量精度為±4%。\n MAX6639采用16引腳QSOP和16引腳薄型QFN、5mm x 5mm封裝。工作在3.0V至3.6V電源電壓，僅消耗500μA的電源電流。

MAX6639_07

2-Channel Temperature Monitor with Dual, Automatic, PWM Fan-Speed Controller

MAX6639_08

2-Channel Temperature Monitor with Dual, Automatic, PWM Fan-Speed Controller

MAX6639_09

Evaluation Kit