This reference design implements an IEEE802.3bt compliant Class 5 Power over Ethernet (PoE) Powered Device (PD) with smooth transition between the PoE input and an auxiliary supply connected to the output. The design consists of a 12-V/2.5-A active clamp forward converter utilizing the UCC2897A controller and allows one PoE Power Source Equipment (PSE) supply and one AC/DC wall adapter auxiliary supply to be used in order to decrease the probability of power and data loss in your system. An IEEE802.3bt compliant TPS2373-4 high power PD controller is utilized to control all PoE functions.
In need of an IEEE802.3bt-ready PSE controller? Check out the TPS23881.
| Output voltage options | PMP21103.1 |
|---|---|
| Vin (Min) (V) | 42.5 |
| Vin (Max) (V) | 57 |
| Vout (Nom) (V) | 12 |
| Iout (Max) (A) | 2.5 |
| Output Power (W) | 30 |
| Isolated/Non-Isolated | Isolated |
| Input Type | DC |
| Topology | Forward- Active Clamp^POE |
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Test results for the reference design, including efficiency graphs, test prerequisites and more
Detailed schematic diagram for design layout and components
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | Test report | Class 5 PoE PD (12 V/2.5 A) supply reference design with smooth transition | Jan. 25, 2019 |
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