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MAX5981B

更新时间： 2024-02-19 06:21:18
品牌 Logo 应用领域
美信 - MAXIM /
页数 文件大小 规格书
16页 1571K
描述
IEEE 802.3af/at-Compliant, Powered Device Interface

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MAX5981B 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：QFN
包装说明：HVQCCN, LCC16,.2SQ,32针数：16
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.31.00.01Factory Lead Time：6 weeks
风险等级：2.25其他特性：RESET THRESHOLD VOLTAGE IS 4V
可调阈值：NO模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUIT
JESD-30 代码：S-XQCC-N16长度：5 mm
湿度敏感等级：1信道数量：1
功能数量：1端子数量：16
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：UNSPECIFIED封装代码：HVQCCN
封装等效代码：LCC16,.2SQ,32封装形状：SQUARE
封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度（摄氏度）：NOT SPECIFIED
电源：48 V认证状态：Not Qualified
座面最大高度：0.8 mm子类别：Power Management Circuits
最大供电电流 (Isup)：0.55 mA最大供电电压 (Vsup)：60 V
标称供电电压 (Vsup)：48 V表面贴装：YES
技术：BICMOS温度等级：INDUSTRIAL
端子形式：NO LEAD端子节距：0.8 mm
端子位置：QUAD处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：5 mmBase Number Matches：1

MAX5981B 数据手册

 浏览型号MAX5981B的Datasheet PDF文件第2页浏览型号MAX5981B的Datasheet PDF文件第3页浏览型号MAX5981B的Datasheet PDF文件第4页浏览型号MAX5981B的Datasheet PDF文件第5页浏览型号MAX5981B的Datasheet PDF文件第6页浏览型号MAX5981B的Datasheet PDF文件第7页 
19-5732; Rev 2; 8/11  
IEEE 802.3af/at-Compliant, Powered Device Interface  
Controllers with Integrated Power MOSFET  
General Description  
Features  
The MAX5981 provides a complete interface for a pow-  
S Sleep Mode and Ultra-Low Power  
S IEEE 802.3af/at Compliant  
®
ered device (PD) to comply with the IEEE 802.3af/at  
standard in a power-over-ethernet (PoE) system. The  
MAX5981 provides the PD with a detection signature,  
classification signature, and an integrated isolation  
power switch with inrush current control. During the  
inrush period, the MAX5981 limits the current to less  
than 180mA before switching to the higher current limit  
(720mA to 880mA) when the isolation power MOSFET is  
fully enhanced. The device features an input UVLO with  
wide hysteresis and long deglitch time to compensate for  
twisted-pair cable resistive drop and to assure glitch-free  
transition during power-on/-off conditions. The MAX5981  
can withstand up to 100V at the input.  
S 2-Event Classification or an External Wall Adapter  
Indicator Output  
S Simplified Wall Adapter Interface  
S PoE Classification 0–5  
S 100V Input Absolute Maximum Rating  
S Inrush Current Limit of 180mA Maximum  
S Current Limit During Normal Operation Between  
720mA and 880mA  
S Current Limit and Foldback  
S Legacy UVLO at 36V  
The MAX5981 supports a 2-Event classification method  
as specified in the IEEE 802.3at standard and provides a  
signal to indicate when probed by a Type 2 power sourc-  
ing equipment (PSE). The device detects the presence  
of a wall adapter power source connection and allows  
a smooth switch over from the PoE power source to the  
wall power adapter.  
S LED Driver with Programmable LED Current  
S Overtemperature Protection  
S Thermally Enhanced, 5mm x 5mm, 16-Pin TQFN  
Applications  
The MAX5981 also provides a power-good (PG) signal,  
two-step current limit and foldback, overtemperature  
protection, and di/dt limit. A sleep mode feature in  
the MAX5981 provides low power consumption while  
supporting Maintain Power Signature (MPS). An ultra-  
low-power sleep mode feature in the MAX5981 further  
reduces power consumption while still supporting MPS.  
The MAX5981 also features an LED driver that is auto-  
matically activated during sleep mode. During sleep  
IEEE 802.3af/at Powered Devices  
IP Phones, Wireless Access Nodes, IP Security  
Cameras  
WiMAXK Base Stations  
Ordering Information  
PIN-  
PACKAGE  
SLEEP  
MODE  
mode, the LED driver sources a periodic current (I  
250Hz (MAX5981A) or 15.625kHz (MAX5981B).  
) at  
LED  
PART  
TEMP RANGE  
MAX5981AETE+  
MAX5981BETE+  
-40NC to +85NC 16 TQFN-EP*  
-40NC to +85NC 16 TQFN-EP*  
Yes  
Yes  
The MAX5981 is available in a 16-pin, 5mm x 5mm TQFN  
power package. The device is rated over the -40°C to  
+85°C extended temperature range.  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
*EP = Exposed pad.  
WiMAX is a trademark of WiMAX Forum.  
IEEE is a registered service mark of the Institute of Electrical  
and Electronics Engineers, Inc.  
_______________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,  
or visit Maxim’s website at www.maxim-ic.com.  
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与MAX5981B相关器件

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MAX5981BETE+ MAXIM

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 		IEEE 802.3af/at-Compliant, Powered Device Interface
MAX5982A MAXIM

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 		IEEE 802.3af/at-Compliant, Powered Device Interface
MAX5982A ADI

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 		IEEE 802.3af/at兼容PD接口控制器，集成70W大功率MOSFET
MAX5982AETE+ MAXIM

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 		Power Supply Support Circuit, Fixed, 1 Channel, BICMOS, 5 X 5 MM, ROHS COMPLIANT, TQFN-16
MAX5982AETE+T MAXIM

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 		Power Supply Support Circuit, Adjustable, 1 Channel, BICMOS, TQFN-16
MAX5982B MAXIM

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 		IEEE 802.3af/at-Compliant, Powered Device Interface
MAX5982B ADI

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 		IEEE 802.3af/at兼容PD接口控制器，集成70W大功率MOSFET
MAX5982BETE+ MAXIM

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 		Power Supply Support Circuit, Fixed, 1 Channel, BICMOS, 5 X 5 MM, ROHS COMPLIANT, TQFN-16
MAX5982C MAXIM

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 		IEEE 802.3af/at-Compliant, Powered Device Interface
MAX5982C ADI

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 		IEEE 802.3af/at兼容PD接口控制器，集成70W大功率MOSFET

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