DESCRIPTION

The LTC?9101-3/LTC9103 chipset is a 8/16-port power

sourcing equipment (PSE) controller and power manager

designed for use in IEEE 802.3at compliant Power

over Ethernet (PoE) systems. The LTC9101-3 manages a

user-defined system-level power budget across all ports.

Port power is automatically assigned based on system

power availability, initial physical classification and after

power up, port dynamic power consumption.

The LTC9101-3 prioritizes port power by port number (port 1

is highest priority) and automatically removes power from

lower priority ports to accommodate higher priority ports.

The LTC9101-3 features an interface to control an external

serial LED driver. LED indications include Port On, Port

Off, Port Power Denied, and Port Fault states. A Supply

Overload LED indicates system power usage is near

power limit or a port is being denied power.

The LTC9101-3 operates without a host present.

Configuration is accomplished by pin settings and I2Cbased

flash programming.

The LTC9101-3 autonomously performs compliant

802.3at detection, classification power up, power on, and

fault management.

FEATURES

- Fully Compliant IEEE 802.3at (Type 2) PSE

- Up to 16 PSE Ports

- Fully Autonomous System-Level Power Manager

- No Host Processor Required

- System-Level PoE LED Controller

- Per-Port Status and Fault LEDs

- Supply Overload LED with Hysteresis

- eFlash-Programmable System Settings

- Port- and System-Level Power Thresholds

- LED Mapping and Blink Rate

- Port Power Priority

- ECC-Protected eFlash and Data RAMs

- Very High Reliability Multipoint PD Detection

- Lowest Per-Port Power Path Dissipation

- 100mΩ Sense Resistance

- 57mΩ or Lower MOSFET RDS(ON)

- Chipset Isolation Eliminates Isolated 3.3V Supply

- Available in a 64-Lead 7mm × 11mm (LTC9103) and

24-Lead 4mm × 4mm (LTC9101-3) QFN Packages

APPLICATIONS

- Small Business PoE PSE Switches/Routers

LTC4278屬于集成電路（IC） > 以太網供電（PoE）控制器。亞德諾半導體技術有限公司制造生產的LTC4278以太網供電（PoE）控制器以太網供電 (PoE) 控制器允許設計人員通過單個以太網連接傳輸電流和數(shù)據(jù)。遠程設備通過以太網電纜供電，因此無需電池、本地電源適配器和其他電源電纜。橋式整流器和 N+1 O-Ring 是兩種 PoE 控制器類型?？捎锰匦钥赡馨?N 和 P 溝道 FET、內部開關和汽車認證。