51204160-175

【廈門莫格電氣自動化有限公司】
★ABBRobots、FANUC Robots、YASKAWA Robots、KUKA Robots、KUKA Robots、
Mitsubishi Robots、OTC Robots、PanasonicRobots、MOTOMAN Robots等。
★ABB：工業機器人備件DSQC系列（中二中三，中四，S4C，IRC5）、Bailey-INFI90
等。
★Westinghouse（西屋）：OVATION系統、WDPF系統、MAX1000系統備件Invensys
★Foxboro（福克斯波羅）：I/A Series系統，FBM（現場輸入/輸出模塊）順序控制、梯形邏輯控制、事故追憶處理、數模轉換、輸入/輸出信號處理、數據通信及處理等。
★Invensys Triconex：余容錯控制系統、基于三重模件冗余（TMR）結構的zui現代化的容錯控制系統。
★Siemens（西門子）：Siemens MOORE，Siemens Simatic C1,Siemens數控系統等。
★Bosch Rexroth（博世力士樂）：Indramat，I/O模塊，PLC控制器，驅動模塊等。
★Motorola（摩托羅拉）：MVME162、MVME167、MVME1772、 MVME177等系
：雷琳（銷售工程師） 電  話 ： 手   機；  
：1982497648     ；    
郵    箱：1982497648     傳    真：（請備注雷琳收）
簡介：
     MAX5974_為寬輸入電壓范圍、有源鉗位、電流模式PWM控制器，為以太網供電(PoE)中的用電設備(PD)提供正激變換。MAX5974A/MAX5974C適用于通用或電信系統的輸入電壓范圍，MAX5974B/MAX5974D則可用于低至10.5V的輸入電壓。
器件包含幾個特性，有助于提高電源效率。AUX驅動器可重復利用電感中的電流，而不是將其損耗在鉗位電路上。AUX與主驅動器之間的可編程死區時間可實現零電壓切換(ZVS)。在輕載條件下，器件降低開關頻率(頻率折返)以減小開關損耗。
MAX5974A/MAX5974B*的電路設計能夠在不需要光耦的前提下獲得穩定的輸出，MAX5974C/MAX5974D則采用傳統的光耦反饋模式。內部誤差放大器帶有1%基準，非常適合非隔離電源設計，能夠節省一路并聯型穩壓器。
器件具有*的前饋zui大占空比鉗位，能夠使瞬變條件下的zui大鉗位電壓獨立于輸入電壓，允許使用具有較低額定電壓的功率MOSFET。可編程頻率加抖功能支持低EMI、擴頻工作。
MAX5974_提供16引腳TQFN-EP封裝，工作在-40°C至+85°C溫度范圍。
關鍵特性51204160-175
·峰值電流模式控制，有源鉗位、正激PWM控制器
·無需光耦即可獲得穩壓輸出(MAX5974A/MAX5974B)
·內置1%誤差放大器
·100kHz至600kHz可編程、±8%抖動控制開關頻率，可同步至高達1.2MHz
·可編程頻率抖動，支持低EMI、擴頻工作
·可編程死區時間、PWM軟啟動、電流斜率補償
·可編程前饋zui大占空比鉗位，zui大限制為80%
·頻率折返支持輕載下的高效工作
·內部自舉UVLO帶有較高滯回
·100uA (典型值)啟動供電電流
·快速、逐周期峰值電流限制，35ns典型傳輸延時
·內部115ns電流檢測邊緣屏蔽
·“打嗝式”輸出短路保護
·反向電流限制避免變壓器由于電流反向而飽和
·3mm x 3mm、16引腳TQFN-EP無鉛封裝
 
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