PoE Powered Device (PD)
Analog Devices powered device (PD) controllers support multiple power levels of power over Ethernet: IEEE PoE (13W), IEEE PoE+ (25.5 W), IEEE PoE++ (71 W), and ADI LTPoE++ (up to 90 W) standard. PD controllers are ultimately responsible for providing the correct signature and classification to power sourcing equipment (PSE), so that PSEs source the right amount of power to PDs over the Ethernet cables. Some of our PD controllers integrate efficient dc-to-dc converters to simplify designs, while our other PD controllers give designers the ability to choose their own dc-to-dc converters, which helps designers achieve unique cost-efficiency requirements.
Product Selection Table
Latest Resources
Product Selector Card
LT Journal
- September 2009 - PD Controller ICs with Integrated Flyback or Forward Controllers Meet Demands of 25.5W PoE+ PDF
- Jan 2009 -PD Interface for PoE+ Includes 25.5W Classification and Protection Features in a Low Profile 4mm × 3mm DFN PDF
- March 2005 - Simplify PoE Implementation with Complete PD Interface and Integrated Switching Regulator PDF
Technical Articles
Videos
Design Notes
- DN361 - Simple Battery Circuit Extends Power over Ethernet (PoE) Peak Current PDF
- DN338 - Power over Ethernet Isolated Power Supply Delivers 11.5W at 90% Efficiency PDF
- DN519 - Active Bridge Rectifiers Reduce Heat Dissipation within PoE Security Cameras PDF
- DN425 - High Power PoE PD Interface with Integrated Flyback Controller PDF
PoE Powered Device (PD)
| SortOrder | Part# | # of Channels | PoE Type | Topology | Max Power (typ) (W) | IEEE-Compliant Classification | IEEE-Compliant Detection | Comments | US Price 1000 to 4999 ($ US) |
|---|---|---|---|---|---|---|---|---|---|
| 1 | LT4294 | 1 | 1, 2, 3, 4 | - | 71 | Five Event, Four Event, One Event, Three Event, Two Event | Yes (Internal 25k resistor) | IEEE 802.3bt PD Interface Controller | $1.95 (LT4294IDD#PBF) |
| 2 | LT4295 | 1 | 1, 2, 3, 4 | Flyback, Forward | 71 | Five Event, Four Event, One Event, Three Event, Two Event | Yes (Internal 25k resistor) | IEEE 802.3bt PD Interface with Forward/Flyback Controller | $2.75 (LT4295IUFD#PBF) |
| 3 | LT4276 | 1 | 1, 2, LTPoE++ | Flyback, Forward | 90 | One Event, Two Event | Yes (Internal 25k resistor) | LTPoE++/PoE+/PoE PD Forward/Flyback Controller | $2.25 (LT4276CIUFD#PBF) |
| 4 | LT4275 | 1 | 1, 2, LTPoE++ | - | 90 | One Event, Two Event | Yes (Internal 25k resistor) | LTPoE++/PoE+/PoE PD Controller | $1.45 (LT4275CIDD#PBF) |
| 5 | LTC4278 | 1 | 2 | Flyback | 25.5 | One Event, Two Event | Yes (Internal 25k resistor) | IEEE 802.3at PD with Synchronous No-Opto Flyback Controller and 12V Aux Support | $2.60 (LTC4278CDKD#PBF) |
| 6 | LTC4269-2 | 1 | 2 | Forward | 25.5 | One Event, Two Event | Yes (Internal 25k resistor) | IEEE 802.3at High Power PD and Sychronous Forward Controller with AUX Support | $2.60 (LTC4269CDKD-2#PBF) |
| 7 | LTC4269-1 | 1 | 2 | Flyback | 25.5 | One Event, Two Event | Yes (Internal 25k resistor) | IEE 802.3at PD with Synchronous No-Opto Flyback Controller | $2.40 (LTC4269CDKD-1#PBF) |
| 8 | LTC4265 | 1 | 2 | - | 25.5 | One Event, Two Event | Yes (Internal 25k resistor) | IEEE 802.3 at High Power PD Interface Controller with 2-Event Classification Recognition | $1.80 (LTC4265CDE#PBF) |
| 9 | LTC4267-3 | 1 | 1 | Flyback | 13 | One Event | Yes (Internal 25k resistor) | Power over Ethernet IEEE 802.3af PD Interface with Integrated 300kHz Switching Regulator | $2.10 (LTC4267CGN-3#PBF) |
| 10 | LTC4267-1 | 1 | 1 | Flyback | 13 | One Event | Yes (Internal 25k resistor) | Power over Ethernet IEEE 802.3af PD Interface with Integrated Switching Regulator | $2.10 (LTC4267CGN-1#PBF) |
| 11 | LTC4267 | 1 | 1 | Flyback | 13 | One Event | Yes (Internal 25k resistor) | Power over Ethernet IEEE 802.3af PD Interface with Integrated Switching Regulator | $2.10 (LTC4267CGN#PBF) |
| 12 | LTC4257-1 | 1 | 1 | - | 13 | One Event | Yes (Internal 25k resistor) | 100V, 400mA internal FET, dual current limit for legacy applications | $1.75 (LTC4257CS8-1#PBF) |
| 13 | LTC4257 | 1 | 1 | - | 13 | One Event | Yes (Internal 25k resistor) | 100V, 400mA internal FET | $1.65 (LTC4257CS8#PBF) |
