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. | |
| Part numbers | 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 |
| Part numbers | |||
|---|---|---|---|
| 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 |
Please review the datasheets to ensure the alternative will work for your application.