ADI LT4275BIMS#PBF

Контроллер (PD)25.5 W802.3at (PoE+), 802.3af (PoE)

Overview

The LT4275BIMS#PBF is a pin-for-pin compatible family of IEEE 802.3 and LTPoE++ Powered Device (PD) Controller employs a proprietary LTPoE++ classification scheme. The LT4275A is fully compatible with IEEE 802.3. The LT4275B is an IEEE 802.3 at compliant, Type 2 (PoE+) PD delivering up to 25.5W. The LT4275BIMS#PBF internal charge pump provides an N-channel MOSFET solution, eliminating a larger and more costly P-channel MOSFET. A low RDS(ON) MOSFET also maximizes power delivery and efficiency, reduces power and heat dissipation and eases thermal design. Startup inrush current is adjustable with an external capacitor. The LT4275BIMS#PBF also includes a power good output, on-board signature resistor, undervoltage lockout and thermal protection. It drives a single opto-coupler to indicate the power level of the attached PSE. Pin-selectable support for non-standard low voltage operation is provided.

Features

Applications

• WLAN Access Points
• Security Cameras
• Internet Appliances
• POS Terminals
• IEEE 802.3af Compliant PoE Powered Devices
• Non-Compliant, Application Specific Devices
• Higher Power Ethernet Powered Devices
• IP Phone Power Management
• Wireless Access Points
• Security Cameras