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 | |
| LTC9103AUKJ#TRPBF | PD69204T4ILQ-TR-LE | |||
| PD69208T4ILQ-TR-LE | ||||
| # 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 |
Please review the datasheets to ensure the alternative will work for your application.