51204160-175

51204160-175

【厦门莫格电气自动化有限公司】
★ABBRobots、FANUC Robots、YASKAWA Robots、KUKA Robots、KUKA Robots、
Mitsubishi Robots、OTC Robots、PanasonicRobots、MOTOMAN Robots等。
★ABB：工业机器人备件DSQC系列（中二中三，中四，S4C，IRC5）、Bailey-INFI90
等。
★Westinghouse（西屋）：OVATION系统、WDPF系统、MAX1000系统备件Invensys
★Foxboro（福克斯波罗）：I/A Series系统，FBM（现场输入/输出模块）顺序控制、梯形逻辑控制、事故追忆处理、数模转换、输入/输出信号处理、数据通信及处理等。
★Invensys Triconex：余容错控制系统、基于三重模件冗余（TMR）结构的zui现代化的容错控制系统。
★Siemens（西门子）：Siemens MOORE，Siemens Simatic C1,Siemens数控系统等。
★Bosch Rexroth（博世力士乐）：Indramat，I/O模块，PLC控制器，驱动模块等。
★Motorola（摩托罗拉）：MVME162、MVME167、MVME1772、 MVME177等系
：雷琳（销售工程师） 电  话 ： 手   机；  
：1982497648     ；    
邮    箱：1982497648     传    真：（请备注雷琳收）
简介：
     MAX5974_为宽输入电压范围、有源钳位、电流模式PWM控制器，为以太网供电(PoE)中的用电设备(PD)提供正激变换。MAX5974A/MAX5974C适用于通用或电信系统的输入电压范围，MAX5974B/MAX5974D则可用于低至10.5V的输入电压。
器件包含几个特性，有助于提高电源效率。AUX驱动器可重复利用电感中的电流，而不是将其损耗在钳位电路上。AUX与主驱动器之间的可编程死区时间可实现零电压切换(ZVS)。在轻载条件下，器件降低开关频率(频率折返)以减小开关损耗。
MAX5974A/MAX5974B*的电路设计能够在不需要光耦的前提下获得稳定的输出，MAX5974C/MAX5974D则采用传统的光耦反馈模式。内部误差放大器带有1%基准，非常适合非隔离电源设计，能够节省一路并联型稳压器。
器件具有*的前馈zui大占空比钳位，能够使瞬变条件下的zui大钳位电压独立于输入电压，允许使用具有较低额定电压的功率MOSFET。可编程频率加抖功能支持低EMI、扩频工作。
MAX5974_提供16引脚TQFN-EP封装，工作在-40°C至+85°C温度范围。
关键特性51204160-175
·峰值电流模式控制，有源钳位、正激PWM控制器
·无需光耦即可获得稳压输出(MAX5974A/MAX5974B)
·内置1%误差放大器
·100kHz至600kHz可编程、±8%抖动控制开关频率，可同步至高达1.2MHz
·可编程频率抖动，支持低EMI、扩频工作
·可编程死区时间、PWM软启动、电流斜率补偿
·可编程前馈zui大占空比钳位，zui大限制为80%
·频率折返支持轻载下的高效工作
·内部自举UVLO带有较高滞回
·100uA (典型值)启动供电电流
·快速、逐周期峰值电流限制，35ns典型传输延时
·内部115ns电流检测边缘屏蔽
·“打嗝式”输出短路保护
·反向电流限制避免变压器由于电流反向而饱和
·3mm x 3mm、16引脚TQFN-EP无铅封装
 
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