LTC4264/5 Interface Controller - Analog Devices

DigiKey电子元器件新产品信息 > LTC4264/LTC4265 High-Power PD Interface Controllers

            LTC4264/LTC4265 High-Power PD Interface Controllers
                    Analog Devices’ controllers are designed for RFID reader systems, PTZ security, and 802.11n access points
    

Image of Analog Devices LTC4264/LTC4265 High Power PD Interface Controller Analog Devices' LTC4264 and LTC4265 are powered device (PD) interface controllers intended for IEEE 802.3at high-power Power over Ethernet (PoE) applications up to 35 W and 25.5 W, respectively.

By including a precision dual current limit, the LTC4264 keeps inrush below the IEEE802.3af current limit levels to ensure interoperability success while allowing for high power PD operation. The LTC4264 includes a ﬁeld-proven power MOSFET delivering up to 750 mA to the PD load while maintaining compliance with the IEEE802.3af standard. Complementary power good outputs allow the LTC4264 to interface directly with a host of DC/DC converter products. The LTC4264 provides a complete signature and power interface solution for PD designs by incorporating the 25k signature resistor, classiﬁcation circuitry, input current limit, undervoltage lockout, thermal overload protection, signature disable, and power good signaling.

By supporting 1-event and 2-event classification signaling as defined by IEEE 802.3, the LTC4265 can be used in a wide range of product configurations. A 100 V MOSFET isolates the DC/DC converter during detection and classification and provides 100 mA inrush current for a smooth power-up transition. The LTC4265 also includes complementary power good outputs, an onboard signature resistor, undervoltage/overvoltage lockout, and comprehensive thermal protection. All PD solutions from ADI include a shutdown pin with signature corrupt to provide flexible auxiliary power options.

The LTC4264 and LTC4265 PD interface controllers can be used along with a variety of DC/DC converter products to provide a complete, cost-effective power solution for high-power PD applications. The controllers are available in a low profile (4 mm × 3 mm) DFN package. The LTC4264 and LTC4265 are ideal for RFID reader systems, PTZ security, and 802.11n access points.

Image of Analog Devices LTC4264/LTC4265 High Power PD Interface Controller Diagram (click to enlarge)

Image of Analog Devices LTC4264/LTC4265 High Power PD Interface Controller Graph

Features
IEEE 802.3af/at PD controller IEEE 802.3at 2-event classification signaling Complete high-power PD interface controller Programmable classification current Flexible auxiliary power support using SHDN pin Onboard 100 V MOSFET with 100 mA inrush current limit Onboard 750 mA power MOSFET		Complementary power good outputs Onboard signature resistor Comprehensive thermal protection Undervoltage and overvoltage lockout Flexible auxiliary power options Precision dual current limit with disable Programmable classiﬁcation current to 75 mA Onboard 25k signature resistor with disable
Applications
RFID reader systems 802.11n access points		High-power VoIP video phones PTZ security cameras and surveillance equipment

LTC4264/LTC4265 High-Power PD Interface Controllers

制造商零件编号	描述	辅助作用	电流 - 供电	工作温度	可供货数量	价格	查看详情
LTC4264CDE#PBF	IC POE CNTRL 1 CHANNEL 12DFN	无	3mA（最大）	0°C ~ 70°C	478 - 立即发货	$49.26	查看详情
LTC4264IDE#PBF	IC POE CNTRL 1 CHANNEL 12DFN	无	3mA（最大）	-40°C ~ 85°C	176 - 立即发货	$52.29	查看详情
LTC4265CDE#PBF	IC POE CNTRL 1 CHANNEL 12DFN	无	1.35mA	0°C ~ 70°C	890 - 立即发货	$33.62	查看详情