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QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1335A-B

HIGH POWER, HIGH EFFICIENCY POE PD INTERFACE WITH INTEGRATED SWITCHING

REGULATOR

6

Figure 7.

Temp Data (37Vport, 5A, Top)

Figure 8.

Temp Data (37Vport, 5A, Bottom)

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Summary of Contents for 1335A-B

Page 1: ...n files for this circuit board are available Call the LTC factory LTC and LT are registered trademarks of Linear Technology Corporation Table 1 Performance Summary TA 25 C PARAMETER CONDITION VALUE Port Voltage VPORT At Ethernet port 37V 57V Auxiliary Voltage VAUX From Aux to Aux terminals 44V 57V Output Voltage VOUT Initial Set point VPORT 37V to 57V IOUT 0A to 5A 5 0V 1 Maximum Output Current VP...

Page 2: ...input filter C5 L2 and C6 and output filter C1 3 L1 and C10 are the reasons that this PoE flyback supply has exceptionally low differential mode conducted emissions QUICK START PROCEDURE Demonstration circuit 1335A B is easy to set up to evaluate the performance of the LTC4269IDKD 1 in a PoE PD application Refer to Figure 1 for proper equipment setup and follow the procedure below NOTE When measur...

Page 3: ...ART GUIDE FOR DEMONSTRATION CIRCUIT 1335A B HIGH POWER HIGH EFFICIENCY POE PD INTERFACE WITH INTEGRATED SWITCHING REGULATOR 3 Figure1 Proper Measurement Equipment Setup Figure2 Measuring Input or Output Ripple ...

Page 4: ...are measured data for a typical DC1335A B 72 74 76 78 80 82 84 86 88 90 92 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 5 0 Output Current A E f fic ie n c y 42V 50V 57V Figure3 Efficiency not including Diode Bridge Figure4 Regulation 4 75 4 80 4 85 4 90 4 95 5 00 5 05 5 10 5 15 5 20 5 25 0 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 5 0 Output Current A E f f ic ie n c y 42V 50V 57V ...

Page 5: ... FOR DEMONSTRATION CIRCUIT 1335A B HIGH POWER HIGH EFFICIENCY POE PD INTERFACE WITH INTEGRATED SWITCHING REGULATOR 5 Figure5 Input and Output Ripple 48Vport 5A Figure6 Load Transient Response 48Vport 2 5A to 5A to 2 5A ...

Page 6: ...QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1335A B HIGH POWER HIGH EFFICIENCY POE PD INTERFACE WITH INTEGRATED SWITCHING REGULATOR 6 Figure7 Temp Data 37Vport 5A Top Figure8 Temp Data 37Vport 5A Bottom ...

Page 7: ...QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1335A B HIGH POWER HIGH EFFICIENCY POE PD INTERFACE WITH INTEGRATED SWITCHING REGULATOR 7 Figure9 Stresses 57Vport 5A Figure10 Stresses 37Vport 5A ...

Page 8: ...QUICK START GUIDE FOR DEMONSTRATION CIRCUIT 1335A B HIGH POWER HIGH EFFICIENCY POE PD INTERFACE WITH INTEGRATED SWITCHING REGULATOR 8 ...

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