音影先锋亚洲天堂网|电影世界尽头的爱完整版播放|国产 熟女 91|高清无码免费观看欧美日韩|韩国一区二区三区黄色录像|美女亚洲加勒比在线|亚洲综合网 开心五月|7x成人在线入口|成人网站免费日韩毛片区|国产黄片?一级?二级?三级

LTC4259ACGW Datasheet

  • LTC4259ACGW

  • Quad IEEE 802.3af Power over Ethernet Controller with AC Dis...

  • 32頁

  • LINER

掃碼查看芯片數(shù)據(jù)手冊

上傳產(chǎn)品規(guī)格書

PDF預覽

FEATURES
s
s
LTC4259A
Quad IEEE 802.3af
Power over Ethernet Controller
with AC Disconnect
DESCRIPTIO
The LTC
廬
4259A is a quad 鈥?8V Hot Swap
TM
controller
designed for use in IEEE 802.3af compliant Power
Sourcing Equipment (PSE). It consists of four independent
ports, each with output current limit, short-circuit protec-
tion, complete Powered Device (PD) detection and classi-
fication capability, and programmable PD disconnect using
AC or DC sensing. Used with power MOSFETs and passives
as in Figure 1, the LTC4259A can implement a complete IEEE
802.3af-compliant PSE.
The LTC4259A can operate autonomously or be controlled
by an I
2
C serial interface. Up to 16 LTC4259As may coexist
on the same data bus, allowing up to 64 powered Ethernet
ports to be controlled with only two digital lines. Fault con-
ditions are optionally signaled with the INT pin to eliminate
software polling.
External power MOSFETs, current sense resistors and di-
odes allow easy scaling of current and power dissipation
levels and provide protection against voltage and current
spikes and ESD events.
The LTC4259A is available in a 36-pin SSOP package.
Linear Technology also provides solutions for 802.3af PD
applications with the LTC4257 and LTC4257-1.
s
s
s
s
s
Controls Four Independent 鈥?48V Powered
Ethernet Ports
Each Port Includes:
鈥?IEEE 802
廬
.3af Compliant PD Detection and
Classification
鈥?Output Current Limit with Foldback
鈥?Short-Circuit Protection with Fast Gate Pull-Down
鈥?PD Disconnect Using AC or DC Sensing
鈥?Power Good Indication
Operates Autonomously or Controlled by I
2
C
TM
Serial Interface
4-Bit Programmable Digital Address Allows Control
of Up to 64 Ports
Programmable INT Pin Eliminates Software Polling
Current and Duty Cycle Limits Protect External FETs
Available in a 36-Pin SSOP Package
APPLICATIO S
s
s
s
IEEE 802.3af Compliant Endpoint and Midspan
Power Sources
IP Phone Systems
DTE Power Distribution
, LTC and LT are registered trademarks of Linear Technology Corporation.
Hot Swap is a trademark of Linear Technology Corporation. 802 is a registered trademark of
Instutute of Electrical and Electronics Engineers, Inc. I
2
C is a trademark of Philips Electronics N.V.
TYPICAL APPLICATIO
INT
SCL
SDAIN
SDAOUT
AD0
AD1
AD2
AD3
3.3V
0.1碌F
0.1碌F
100V X7R
SHDN1 SHDN2 SHDN3 SHDN4
V
DD
OSCIN
AUTO BYP
RESET
DETECT1
DETECT2
DETECT3
DETECT4
LTC4259A
CMPD3003
脳4
1k
脳4
0.47碌F
100V
脳4
X7R
DGND AGND V
EE
SENSE1 GATE1 OUT1 SENSE2 GATE2 OUT2 SENSE3 GATE3 OUT3 SENSE4 GATE4 OUT4
R
S1
鈥?8V
0.1碌F
Q1
10k
R
S2
10k
10k
10k
Q2
R
S3
PORT3
Q3
R
S4
Q4
PORT4
S1B
脳4
4259A F01
RS1 TO RS4: 0.5鈩?/div>
Q1 TO Q4: IRFM120A
Figure 1. Complete 4-Port Powered Ethernet Power Source
4259Af
U
U
U
0.1碌F 100V
脳4
SMAJ58A
脳4
PORT1
PORT2
1

LTC4259ACGW 產(chǎn)品屬性

  • LTC4259A

  • 32

  • 集成電路 (IC)

  • 接口 - 控制器

  • -

  • 以太網(wǎng)供電控制器（POE）

  • I²C

  • 3 V ~ 4 V

  • 2.5mA

  • 0°C ~ 70°C

  • 表面貼裝

  • 36-BSOP（0.295"，7.50mm 寬）

  • 36-SSOP

  • 管件

LTC4259ACGW相關(guān)型號PDF文件下載

  • 型號
    版本
    描述
    廠商
    下載
  • 英文版
    Low Power RS485 Interface Transceiver
    LINER
  • 英文版
    Low Power RS485 Interface Transceiver
    Linear
  • 英文版
    Quad Low Power RS485 Driver
    LINER
  • 英文版
    Quad Low Power RS485 Driver
    Linear
  • 英文版
    Quad Low Power RS485 Driver
    LINER
  • 英文版
    Quad Low Power RS485 Driver
    Linear
  • 英文版
    Quad RS485 Line Receiver
    LINER
  • 英文版
    Quad RS485 Line Receiver
    Linear
  • 英文版
    Quad RS485 Line Receiver
    LINER
  • 英文版
    Quad RS485 Line Receiver
    Linear
  • 英文版
    Differential Driver and Receiver Pair
    LINER
  • 英文版
    Differential Driver and Receiver Pair
    Linear
  • 英文版
    Differential Driver and Receiver Pair
    LINER
  • 英文版
    Differential Driver and Receiver Pair
    Linear
  • 英文版
    2A Synchronous Buck Li-Ion Charger
    LINER [Lin...
  • 英文版
    Standalone Linear Li-lon Battery Charger with Thermistor Inp...
    LINER
  • 英文版
    Standalone Li-Ion Switch Mode Battery Charger
    Linear
  • 英文版
    4A, High Efficiency, Standalone Li Battery Charger
    LINER
  • 英文版
    4A, High Efficiency, Standalone Li-Ion Battery Charger
    LINER [Lin...
  • 英文版
    4A High Efficiency Standalone Li-Ion Battery Charger
    Linear

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務：
賣家服務：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時間周一至周五
9:00-17:30

關(guān)注官方微信號，
第一時間獲取資訊。

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫提出的寶貴意見，您的參與是維庫提升服務的動力！意見一經(jīng)采納，將有感恩紅包奉上哦！