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Texas Instruments TPS2373-4RGWR | Demoboard PMP21103
Class 5 PoE PD (12 V/2.5 A) supply reference design with smooth transition to auxiliary
Overview
| Topology | Other Topology |
| Input voltage | 42.5-57 V |
| Output 1 | 12 V / 2.5 A |
| IC revision | B |
Description
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.
Features
- Smooth transition when switching between PoE input and 12-V adapter on output
- 89% efficiency with 12-V/2.5-A output and PoE input (FET OR-ing)
- Diode OR-ing option for lower cost
Typical applications
- Outdoor backhaul unit, Small cell base station, WLAN/Wi-Fi access point
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | C | Tol. C | Size | DF(%) | RISO | Ceramic Type | L(mm) | W(mm) | H(mm) | Fl(mm) | Packaging | Winding Style | Number of windings | L1(µH) | Zmax(Ω) | IR(mA) | RDC max.(Ω) | VR(V (DC)) | Z(Ω) | Data rate | Ports | PoE | Improved CMRR | Operating Temperature | VT(V (AC)) | Mount | L(µH) | LSmin.(nH) | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WCAP-CSGP MLCCs 25 V(DC), 10 µF, ±10% | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 25 V(DC) | Capacitance10 µF | Capacitance±10% | Size1210 | Dissipation Factor5 % | Insulation Resistance0.01 GΩ | Ceramic TypeX7R Class II | Length3.2 mm | Width2.5 mm | Height2 mm | Pad Dimension0.3 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | Rated Voltage25 V (DC) | – | – | – | – | – | Operating Temperature -55 °C up to +125 °C | – | – | – | – | |||||
 | WE-SL5 SMT Common Mode Line Filter, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-SL5 SMT Common Mode Line Filter | – | – | – | – | – | – | Length10 mm | Width8.7 mm | Height6.5 mm | – | – | Winding Stylesectional | Number of windings2 | Inductance [1]250 µH | Maximum Impedance1200 Ω | Rated Current2000 mA | DC Resistance [1]0.035 Ω | Rated Voltage80 V (DC) | – | – | – | – | – | Operating Temperature -40 °C up to +125 °C | Insulation Test Voltage1000 V (AC) | MountSMT | Inductance250 µH | Leakage Inductance [min.]1500 nH | ||||
 | WE-SL5 HC SMT Common Mode Line Filter, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-SL5 HC SMT Common Mode Line Filter | – | – | – | – | – | – | Length9.5 mm | Width8.3 mm | Height5 mm | – | – | Winding Stylesectional | Number of windings2 | Inductance [1]9 µH | – | Rated Current3500 mA | DC Resistance [1]0.011 Ω | Rated Voltage80 V (DC) | Impedance800 Ω | – | – | – | – | Operating Temperature -40 °C up to +125 °C | Insulation Test Voltage500 V (AC) | MountSMT | Inductance9 µH | Leakage Inductance [min.]970 nH | ||||
 | WE-LAN LAN Transformer, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LAN LAN Transformer | – | – | – | – | – | – | Length17.55 mm | Width16 mm | Height98.8 mm | Pad Dimension13.97 mm | – | – | – | Inductance [1]350 µH | – | – | – | – | – | Data rate10/100/1000BASE-T | Ports1 | PoE4PPoE (up to 1000 mA) | Improved Common Mode RejectionNo | Operating Temperature -40 °C up to +105 °C | Insulation Test Voltage1500 V (AC) | MountSMT | Inductance350 µH | – |