This Product Selection Guide contains information to help select products in the Power Over Ethernet (PoE) Controllers category on DigiKey.com
Power over Ethernet (PoE) controllers allow designers to transmit electrical current and data over a single Ethernet connection. Remote devices are powered through Ethernet cabling, eliminating the need for batteries, local power adaptors, and additional power cabling. A bridge rectifier and an N+1 O-Ring are two types of PoE controllers. Available features may include N and P-channel FETs, internal switches, and automotive certification.
SelectionCharacteristics
Type: Defines the primary construction style of the device, indicating which type of part it is and determining its general usage.
Number of Channels: The number of communication channels the item has.
Power - Max: Typically this represents the maximum power rating to which a device will meet its given specifications. Exceeding this power rating may damage the device and other system components.
Internal Switch(s): Indicates whether or not a device integrates the power transistor(s) needed for manipulation of the power source a device is intended to control.
Auxiliary Sense: Indicates whether or not the IC provides accommodations for the use of auxiliary (non-PoE) power sources.
Standards: Enumerates protocol, format, form factor, or similar standards with a device conforms.
Voltage - Supply: Typically represented by a range, this indicates the low and high voltage limits which one can expect standard operation. Voltages outside this range may damage the device and other system components.
Current - Supply: This represents the maximum current to which a device will meet its given specifications. Exceeding this current may damage the device and/or other system components.
Operating Temperature: Recommended operating temperature, typically given in a range or as a maximum. Exceeding these temperatures may affect performance or damage the device and other system components.
Mounting Type: Indicates how the device is attached.
Package / Case: Indicates the type of protective case used on an electronic component to allow easy handling, installation, and protection. This selection was determined to be the closest industry standard applicable to the supplier device packaging. Typically it is best to check the actual dimensions from the datasheet rather than depend on this terminology when designing your circuit.
Supplier Device Package: This is what the manufacturer calls the package of this device. They are manufacturer specific. It is typically best to use the actual dimensions from the datasheets rather than to go by this terminology when designing your circuit.
ProductExamples
| MFR PART # | LTC4257CS8#PBF |
|---|---|
| DIGI-KEY PART # | LTC4257CS8#PBF-ND |
| MANUFACTURER | Analog Devices Inc. |
| DESCRIPTION | Power Over Ethernet Controller 1 Channel 802.3af (PoE) 8-SO |
| DATASHEET | Click Here |
| MFR PART # | SI3471A-A01-IMR |
|---|---|
| DIGI-KEY PART # | 336-SI3471A-A01-IMRTR-ND - Tape & Reel (TR) |
| MANUFACTURER | Skyworks Solutions Inc. |
| DESCRIPTION | Power Over Ethernet Controller 1 Channel 802.3at (PoE), 802.3af (PoE), 802.3bt 38-QFN (5x7) |
| DATASHEET | Click Here |
| MFR PART # | TPS23751PWPR |
|---|---|
| DIGI-KEY PART # | 296-46376-2-ND - Tape & Reel (TR) |
| MANUFACTURER | Texas Instruments |
| DESCRIPTION | Power Over Ethernet Controller 1 Channel 802.3at (PoE+), 802.3af (PoE) 16-HTSSOP |
| DATASHEET | Click Here |
| MFR PART # | NCP1093MNRG |
|---|---|
| DIGI-KEY PART # | NCP1093MNRGOSTR-ND - Tape & Reel (TR) |
| MANUFACTURER | onsemi |
| DESCRIPTION | Power Over Ethernet Controller 1 Channel 802.3at (PoE+), 802.3af (PoE) 10-DFN (3x3) |
| DATASHEET | Click Here |
MediaLinks
Videos
Next Generation Power Over Ethernet
Articles
An Introduction to Power-over-Ethernet
Product Training Modules
Power over Ethernet - Analog Devices
TechForum
Why Power over Ethernet