Competitive Comparisons of IEEE 802.3at Power-over-Ethernet (PoE) Power Sourcing Equipment (PSE)

Competitive Comparisons of IEEE 802.3at Power-over-Ethernet (PoE) Power Sourcing Equipment (PSE) Controllers with Power Management and LED Control

Manufacturer
Analog Devices Inc. Microchip Technology Texas Instruments Skyworks Solutions Inc.
Partnumbers PD69210C-022319
PD69204T4ILQ-TR-LE
LTC9101AUF-1#TRPBF PD69220C-022419 TPS23880RTQR SI3474A-A01-IMR
LTC9103AUKJ#TRPBF PD69208MILQ-TR-LE TPS23881ARTQT SI3474B-A01-IMR
# Channels 8 4-Aug 8 8
# Ports 8 / 16 ports (2-pair) 8 / 4 ports (2-pair) 8 ports (2-pair) 8 ports (2-pair)
4 / 2 ports (4-pair) 4 ports (4-pair) 4 ports (4-pair)
Integrated Power Management Yes Yes No No
Integrated LED control Yes No No
Scalable Chipset Yes, 2x analog ICs Yes, 12x analog ICs No No
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 Yes Yes Yes No
Abs Max OUT 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
Isolation Medium Ethernet Transformer Optocouplers/Digital Isolators Optocouplers/Digital Isolators Optocouplers/Digital Isolators
Power MOSFETs External (57mΩ 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 Yes Yes Yes Yes
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
Partnumbers LTC9101AUF-1#TRPBF LTC4271IUF#PBF LTC4270AIUKG#PBF
LTC9103AUKJ#TRPBF LTC4290CIUJ#PBF LTC4271IUF#TRPBF
PoE Standard 802.3at 802.3at 802.3at
# Ports Up to 8 (2-pair) Up to 8 (2-pair) 12 (2-pair)
Up to 16 (2-pair)
Integrated Power Management Yes No No
Integrated LED Control Yes No No
Scalable Chipset Yes, 2× analog ICs No No
Firmware Image Storage Flash (non volatile memory) RAM RAM
Stored Configurations Yes No No
Abs Max OUT / SENSE Pins -20V to +80V -0.3V to +80V -0.3V to +80V
OUT / Sense Resistor Value 100 mΩ 150 mΩ 250 mΩ
Parallel Detect/Class/Power On Yes No No
Bottom-Side Steering Diode Not Required Required Required
Port Output Capacitor 0.1μ‎F, 100V 0.22μ‎F, 100V 0.22μ‎F, 100V
VSSK Filter Not Required Required Required
10 Ω AGND Resistor Not Required Required Required

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