MAX5969B

IEEE 802.3af/at兼容、受电设备接口控制器,集成功率MOSFET

IEEE 802.3af/at兼容用电设备接口控制器,支持PoE+应用


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说明

MAX5969A/MAX5969B为用电设备(PD)提供符合以太网供电(PoE)系统IEEE® 802.3af/at标准的完整接口。MAX5969A/MAX5969B为PD提供检测信号、分级信号以及带有浪涌电流控制的集成隔离功率开关。发生浪涌期间,MAX5969A/MAX5969B将电流限制在180mA以内,直到隔离功率MOSFET完全开启后切换到较高的限流值(720mA至880mA)。器件具有输入UVLO,带有滞回和长周期干扰脉冲屏蔽,以补偿双绞线电缆的阻性衰减,确保上电/掉电期间无干扰传输。MAX5969A/MAX5969B输入端能够承受高达100V的电压。

MAX5969A/MAX5969B支持IEEE 802.3at标准规定的2级事件分级方法,并提供一个信号用于指示2类供电设备(PSE)的侦测情况。器件检测墙上适配器电源的连接状态,允许从PoE电源平滑切换到墙上适配器电源。

MAX5969A/MAX5969B还提供电源就绪(PG)信号、2级电流限制和折返式热保护以及di/dt限制。

MAX5969A/MAX5969B采用节省空间的10引脚、3mm × 3mm、TDFN封装,工作在-40°C至+85°C扩展级温度范围。
MAX5969A、MAX5969B:典型应用电路 MAX5969A、MAX5969B:典型应用电路 放大+

关键特性

  • 兼容于IEEE 802.3af/at
  • 2级事件分级
  • 简易的墙上适配器接口
  • 0至5级PoE分级
  • 100V绝对最大额定输入
  • 180mA最大浪涌电流限制
  • 正常工作期间电流限制在720mA至880mA
  • 电流限制和折返式保护
  • 传统的36V UVLO (MAX5969A)
  • IEEE 802.3af/at兼容,40V UVLO (MAX5969B)
  • 过热保护
  • 增强散热的3mm × 3mm、10引脚TDFN封装

应用

  • IEEE 802.3af/at用电设备
  • IP电话、无线接点、IP安全摄像机
  • WiMAX™基站
Part NumberComplianceRDS(ON)
(Ω)
PWMUVLO Threshold
(V)
Package/PinsOper. Temp.
(°C)
Budgetary
Price
PD MOSFETSee Notes
MAX5969A 
IEEE 802.3af
IEEE 802.3at
0.5No35.4
TDFN/10
-40 to +85$1.90 @1k
MAX5969B 38.6
TDFN/10
查看所有Powered Devices (31)
Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。


MAX5969BEVKIT: MAX5969A和MAX5969B评估板
MAX5969AEVKIT: MAX5969A和MAX5974A评估板

CAD Symbols and Footprints

  • MAX5969BETB+
  • MAX5969BETB+T
  • MAX5969BETE+T
  • 型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

    备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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