LTC9101-2 Series

8/16-Port IEEE 802.3at PoE PSE Controller with Power Management and LED Control

Catalog

8/16-Port IEEE 802.3at PoE PSE Controller with Power Management and LED Control

Part	Number of Channels	Mounting Type	Package / Case	Supplier Device Package	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Supply [Max]	Voltage - Supply [Min]	Standards	Current - Supply	Type
Analog Devices LTC9101AUF-3#TRPBF	16	Surface Mount	24-WFQFN Exposed Pad	24-QFN (4x4)	85 °C	-40 °C	57 V	51 V	802.3at (PoE)	40 mA	Controller (PSE)
Analog Devices LTC9101AUF-2#TRPBF	24	Surface Mount	24-WFQFN Exposed Pad	24-QFN (4x4)	85 °C	-40 °C	57 V	53 V	802.3af (PoE) 802.3at (PoE+) 802.3bt	40 mA	Controller (PSE)
Analog Devices LTC9101AUF-2#PBF	24	Surface Mount	24-WFQFN Exposed Pad	24-QFN (4x4)	85 °C	-40 °C	57 V	53 V	802.3af (PoE) 802.3at (PoE+) 802.3bt	40 mA	Controller (PSE)

Catalog

8/16-Port IEEE 802.3at PoE PSE Controller with Power Management and LED Control

Key Features

• Fully Compliant IEEE 802.3at (Type 2) PSE

• Up to 16 PSE Ports

• Fully Autonomous System-Level Power ManagerNo Host Processor Required

• No Host Processor Required

• System-Level PoE LED ControllerPer-Port Status and Fault LEDsSupply Overload LED with Hysteresis

• Per-Port Status and Fault LEDs

• Supply Overload LED with Hysteresis

• eFlash-Programmable System SettingsPort- and System-Level Power ThresholdsLED Mapping and Blink RatePort Power Priority

• 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 Dissipation100mΩ Sense Resistance57mΩ or Lower MOSFET RDS(ON)

• 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

Description

The LTC®9101-2/LTC9102 chipset is a 12/24-port power sourcing equipment (PSE) controller designed for use in IEEE 802.3bt Type 3 and 4 compliant Power over Ethernet (PoE) systems. The LTC9101-2/LTC9102 is designed to power compliant 802.3af, 802.3at, and 802.3bt PDs. The LTC9101-2/LTC9102 chipset delivers lowest-in-industry heat dissipation by utilizing low RDS(ON)external MOSFETs and 0.1Ω sense resistance per power channel. A transformer-isolated communication protocol replaces expensive opto-couplers and complex isolated 3.3V supply, resulting in significant BOM cost savings.Advanced power management features include per-port 14‑bit current/voltage monitoring, programmable power limits, and versatile fast shut down of preselected ports. An advanced power management host software layer is available. PD detection uses a proprietary multipoint detection mechanism ensuring excellent immunity from false PD identification. Autoclass and 5-event physical classification are supported. The LTC9101-2/LTC9102 includes an I2C serial interface operable up to 1MHz. The LTC9101-2/LTC9102 is pin or I2C programmable to negotiate PD delivered power up to 71.3W.APPLICATIONSPoE PSE Switches/Routers and Midspans