Competitive Comparisons of Power-over-Ethernet (PoE) Controllers from Analog Devices Incs

Competitive Comparisons of Power-over-Ethernet (PoE) Power Sourcing Equipment (PSE) Controllers from ADI

Manufacturers Linear Technology Corp. / now ADI Microsemi / now Microchip Texas Instruments (TI) Skyworks
Power-over-Ethernet (PoE) Controller Part Numbers LTC9101AUF-2#PBF PD69210R-022420 TPS23880RTQR SI3474A-A01-IMR
LTC9102AUKJ#TRPBF PD69220C-022419 TPS23881ARTQT SI3474B-A01-IM
# Channels 8-Dec 4-Aug 8 8
# Ports 12 / 8 ports (2-pair) 8 / 4 ports (2-pair) 8 ports (2-pair) 8 ports (2-pair)
6 / 4 ports (4-pair) 4 / 2 ports (4-pair) 4 ports (4-pair) 4 ports (4-pair)
Scalable Chipset Yes, 4x analog ICs Yes, 12x analog ICs No No
Up to 24/48 Ports Up to 48/96 Ports
Non-Volatile Memory Yes, Flash Memory (ECC/CRC, 2 copies) Yes No, SRAM Yes, Flash Memory
PD Detection Scheme 4-point 4-point 4-point 2-point
(force 2 currents, force 2 voltages) (force voltages) (force currents) (force voltages)
PD Legacy Detection ü ü ü û
Abs Max PORT Pins -20V to 80V -0.3V to 72.5V -0.3V to 70V -3V to 80V
Abs Max SENSE Pins -20V to 80V n/a (internal sense) -0.3V to 3V -0.3V to 3V
Abs Max GATE Pins -0.3V to 80V n/a (internal FET) -0.3V to 13V -0.3V to 20V
Isolation Medium Ethernet Transformers Optocouplers/Digital Isolators Optocouplers/Digital Isolators Optocouplers/Digital Isolators
Power MOSFETs External (30mΩ typ) Internal 0.24Ω External External
Sense Resistor Compatibility 0.1Ω Internal 0.1Ω 0.255Ω / 0.200Ω 0.255Ω / 0.200Ω
Autonomous/Semi-Auto/ Manual Mode Operation ü ü ü ü
Host Digital Interface I²C UART/I²C I²C I²C
Temperature Range (ambient) -40°C to 85°C -40°C to 85°C -40°C to 125°C (junction) -40°C to 85°C
Package 24-Lead 4mm × 4mm QFN 32-pin, 5 mm × 5 mm QFN 56-pin, 8 x 8 mm VQFN 56-pin, 8 x 8 mm QFN
64-Lead 7mm × 11mm QFN 56-pin, 8 x 8 mm QFN

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