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LTC4263IS

更新时间： 2024-02-23 12:42:54
品牌 Logo 应用领域
凌特 - Linear 开关微控制器和处理器外围集成电路uCs集成电路uPs集成电路光电二极管
页数 文件大小 规格书
24页 337K
描述
Single IEEE 802.3af Compliant PSE Controller with Internal Switch

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LTC4263IS 技术参数

是否无铅： 含铅是否Rohs认证： 符合
生命周期：Active包装说明：SOP,
针数：14Reach Compliance Code：compliant
风险等级：5.06JESD-30 代码：R-PDSO-G14
JESD-609代码：e3长度：8.649 mm
湿度敏感等级：1端子数量：14
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：1.752 mm最大供电电压：5.5 V
最小供电电压：4.5 V标称供电电压：5 V
表面贴装：YES技术：CMOS
温度等级：INDUSTRIAL端子面层：Matte Tin (Sn)
端子形式：GULL WING端子节距：1.27 mm
端子位置：DUAL处于峰值回流温度下的最长时间：30
宽度：3.899 mmuPs/uCs/外围集成电路类型：MICROPROCESSOR CIRCUIT
Base Number Matches：1

LTC4263IS 数据手册

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LTC4263  
Single IEEE 802.3af  
Compliant PSE Controller  
with Internal Switch  
DESCRIPTION  
The LTC®4263 is an autonomous single-channel PSE  
controller for use in IEEE 802.3af compliant Power over  
Ethernet systems. It includes an onboard power MOSFET,  
internal inrush, current limit, and short-circuit control,  
IEEE 802.3af compliant PD detection and classification  
circuitry, and selectable AC or DC disconnect sensing.  
OnboardcontrolalgorithmsprovidecompleteIEEE802.3af  
compliantoperationwithouttheneedofamicrocontroller.  
The LTC4263 simplifies PSE implementation, needing  
only a single 48V supply and a small number of passive  
support components.  
FEATURES  
IEEE 802®.3af Compliant  
n
n
Operation from a Single 48V Supply  
n
Fully Autonomous Operation without  
Microcontroller  
n
Internal MOSFET with Thermal Protection  
n
Power Management Works Across Multiple Ports  
with Simple RC Network  
n
Precision Inrush Control with Internal Sense Resistor  
n
Powered Device (PD) Detection and Classification  
n
AC and DC Disconnect Sensing  
Robust Short-Circuit Protection  
n
n
Pin-Selectable Detection Backoff for Midspan PSEs  
Programmable onboard power management circuitry  
permits multiple LTC4263s to allocate and share power  
in multi-port systems, allowing maximum utilization of  
the 48V power supply—all without the intervention of a  
host processor. The port current limit can be configured  
to automatically adjust to the detected PD class. Detec-  
tion backoff timing is configurable for either Endpoint or  
Midspanoperation.Built-infoldbackandthermalprotection  
provide comprehensive fault protection.  
n
Classification Dependent I  
Current Threshold  
CUT  
n
LED Driver Indicates Port On and Blinks  
Status Codes  
n
Available in 14-Pin SO and 4mm × 3mm DFN Packages  
APPLICATIONS  
n
IEEE 802.3af Compliant Endpoint/Midspan PSEs  
n
Single-Port or Multi-Port Power Injectors  
n
Power Forwarders  
An LED pin indicates the state of the port controlled by  
the LTC4263. When run from a single 48V supply, the LED  
pin can operate as a simple switching current source to  
reduce power dissipation in the LED drive circuitry.  
n
Low-Port Count PSEs  
n
Environment B PSEs  
n
Standalone PSEs  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of  
Linear Technology Corporation. Hot Swap and ThinSOT are trademarks of Linear Technology  
Corporation. All other trademarks are the property of their respective owners.  
The LTC4263 is available in 14-pin 4mm × 3mm DFN and  
14-pin SO packages.  
TYPICAL APPLICATION  
Single-Port Fully Autonomous PSE  
1A  
+
0.1μF  
100V  
0.1μF  
100V  
LTC4263  
LED  
V
DD5  
TO PORT  
MAGNETICS  
ISOLATED  
48V SUPPLY  
0.1μF  
SMAJ58A  
LEGACY  
ENFCLS  
MIDSPAN  
PWRMGT  
SD  
V
DD48  
OUT  
–
V
V
SS  
SS  
OUT  
ACOUT  
OSC  
4263 TA01  
4263fe  
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