参数资料
| 型号： | LTC4266IGW#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/30页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR IEEE 802.3AT 36-SSOP |
| 产品培训模块： | Power over Ethernet |
| 标准包装： | 32 |
| 控制器类型： | 以太网控制器（IEEE 802.3） |
| 接口： | I²C，2 线串口 |
| 电源电压： | 3.3V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-BSOP（0.295"，7.50mm 宽） |
| 供应商设备封装： | 36-SSOP |
| 包装： | 管件 |
| 产品目录页面： | 1338 (CN2011-ZH PDF) |
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LTC4266
1
4266fd
n High Power PSE Switches/Routers
n High Power PSE Midspans
APPLICATIONS
FEATURES
DESCRIPTION
Quad IEEE 802.3at Power
over Ethernet Controller
The LTC4266 is a quad PSE controller designed for use
in IEEE 802.3 Type 1 and Type 2 (high power) compliant
Power over Ethernet systems. External power MOSFETs
enhance system reliability and minimize channel resis-
tance, cutting power dissipation and eliminating the need
for heatsinks even at Type 2 power levels. External power
components also allow use at very high power levels while
remaining otherwise compatible with the IEEE standard.
80V-rated port pins provide robust protection against
external faults.
The LTC4266 includes advanced power management
features, including current and voltage readback and pro-
grammable ICUT and ILIM thresholds. Available C libraries
simplify power-management software development; an
optional AUTO pin mode provides fully IEEE-compliant
standalone operation with no software required. Proprietary
4-point PD detection circuitry minimizes false PD detec-
tion while supporting legacy phone operation. Midspan
operation is supported with built-in 2-event classification
and backoff timing. Host communication is via a 1MHz
I2C serial interface.
The LTC4266 is available in a 5mm
× 7mm QFN package
that significantly reduces board space compared with
competing solutions. A legacy-compatible 36-pin SSOP
package is also available.
n Four Independent PSE Channels
n Compliant with IEEE 802.3at Type 1 and 2
n 0.34Ω Total Channel Resistance
130mW/Port at 600mA
n Advanced Power Management
8-Bit Programmable Current Limit (ILIM)
7-Bit Programmable Overload Currents (ICUT)
Fast Shutdown of Preselected Ports
14.5-Bit Port Current/Voltage Monitoring
2-Event Classification
n Very High Reliability 4-Point PD Detection:
2-Point Forced Voltage
2-Point Forced Current
n High Capacitance Legacy Device Detection
n LTC4259A-1 and LTC4258 Pin and SW Compatible
n 1MHz I2C Compatible Serial Control Interface
n Midspan Backoff Timer
n Supports Proprietary Power Levels Above 25W
n Available in 38-Pin 5mm
× 7mm QFN and 36-Pin
SSOP Packages
TYPICAL APPLICATION
Complete 4-Port Ethernet High Power Source
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
4266 TA01
SCL
SDAIN
SDAOUT
AD0
AD1
AD2
AD3
AGND VEE SENSE1
–50V
1μF
SMAJ58A
GATE1 OUT1
OUT2
OUT3
SENSE2 GATE2
SENSE3 GATE3
SENSE4 GATE4 OUT4
PORT1
–50V
0.22μF 100V
×4
S1B
×4
S1B
×4
PORT2
PORT3
PORT4
DGND
VDD
INT
SHDN1 SHDN2
AUTO
MSD
RESET
SHDN3 SHDN4
MID
0.1μF
3.3V
LTC4266
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4266IUHF#PBF | 制造商:Linear Technology 功能描述:POE Controller 25.5W 38-Pin QFN EP 制造商:Linear Technology 功能描述:IC POE 802.3AT QUAD PSE 38-QFN 制造商:Linear Technology 功能描述:POE CNTRL QUAD 25.5W 1MHZ 制造商:Linear Technology 功能描述:IC, POE CONTROLLER, 3.3V, QFN-38; Input Voltage:3.3V; Supply Current:-2.4mA; UVLO:25V; Digital IC Case Style:QFN; No. of Pins:38; Frequency:1MHz; Operating Temperature Min:-40C; Operating Temperature Max:85C; MSL:MSL 1 - Unlimited ;RoHS Compliant: Yes |
| LTC4266IUHF#TRPBF | 制造商:Linear Technology 功能描述:POE Controller 25.5W 38-Pin QFN EP |
| LTC4267 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Quad IEEE 802.3at Power over Ethernet Controller |
| LTC4267-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Power over Ethernet IEEE 802.3af PD Interface with Integrated Switching Regulator |
| LTC4267-3 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Power over Ethernet IEEE 802.3af PD Interface with Integrated Switching Regulator |
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