MAX5940, MAX5940A, MAX5940B
IEEE 802.3af PD接口控制器，用于以太网供电
业内首款符合IEEE 802.3af标准的用电设备接口控制器，具有可调节的欠压锁存门限
概述
完整的数据资料
(PDF, 248kB)
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MAX5940A/MAX5940B/MAX5940C/MAX5940D为用电设备(PD)提供完整的接口功能，遵从IEEE® 802.3af标准，用于以太网供电系统中。MAX5940A/MAX5940B/MAX5940C/MAX5940D为PD提供带有检测签名、分类签名和带可编程浪涌电流控制的集成隔离开关。该类器件还具有供电模式、宽滞回的欠压锁定(UVLO)功能，和供电正常状态指示。MAX5940A/MAX5940B具有80V的最大绝对额定值，MAX5940C/MAX5940D的最大绝对额定值为90V。
关键特性
应用/使用
完全集成的IEEE 802.3af PD接口
PD检测和可编程的分类签名
检测期间低于10µA的漏电流偏差
集成的MOSFET用于隔离和浪涌电流限制
90V绝对最大额定值(MAX5940C/MAX5940D)
栅极输出允许外部控制内部隔离MOSFET
可编程的浪涌电流控制
可编程的欠压琐定功能(仅MAX5940B/MAX5940D)
宽UVLO滞回适应双绞线电缆电压降
PGOOD//PGOOD输出启动下游DC-DC转换器
-40°C至+85°C工作温度范围
Key Specifications:
Powered Devices
Part Number
IEEE Compliance
PD MOSFET RDS(ON) (Ω)
Includes PWM
Protection Features
Programmable UVLO
RoHS Available
Package
Smallest Available Package (max w/pins) (mm2 )
Operating Temp. Range (°C)
Price**
MAX5940
802.3af
0.6
No
Programmable Inrush Current
Yes
Yes
SOIC(N)/8
31
-40 to +85
$0.98 @ 1k
See All Powered Devices (4)
Notes:
** This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
参考文献： 19-2991;
Rev. 2;
2006-03-27
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