POEPHYTEREV-I National Semiconductor, POEPHYTEREV-I Datasheet - Page 23

• Manufacturer Part Number: POEPHYTEREV-I
• Description: BOARD EVAL LM5072, DP83848I
• Manufacturer: National Semiconductor
• Series: PHYTER®r

Specifications of POEPHYTEREV-I

• Main Purpose: Special Purpose DC/DC, Power Over Ethernet
• Outputs And Type: 1, Isolated
• Power - Output: 24W
• Voltage - Output: 3.3V
• Current - Output: 7.3A
• Voltage - Input: 39 ~ 57V
• Regulator Topology: Flyback
• Frequency - Switching: 250kHz
• Board Type: Fully Populated
• Utilized Ic / Part: DP83848, LM5072
• Lead Free Status / RoHS Status: Not applicable / Not applicable

Application Example #3:
Figure 20 shows an application example of the non-isolated version of Figure 18 . This non-isolated version saves many parts
used in the isolated feedback example shown in Figure 18. Similar simplification also applies to the non-isolated version of Figure
19.
Application Example #4
Figure 21 shows an application example of a PD solution using the buck topology. Q2, a dual PNP transistor, is employed in the
output voltage sensing to achieve temperature compensation for the regulated output.
FIGURE 20. PD Solution with Non-Isolated Flyback Topology
FIGURE 21. PD Solution with Buck Topology
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