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AN1894 - APPLICATION NOTE

The PCB layout of the copper connections is depicted in Figure 4. The holes for through-hole

components are not seen in the picture.

The physical appearance of the converter can be observed from Figure 5.

Figure 5: Picture of the Converter

2.1.5 Buck Converter Evaluation and Measurements

The output regulation characteristics can be seen in Figure 6. It shows the variation of the output voltage

with output current at specific DC input voltage. The zener diode D6 was not connected during the

measurements

Using the same measured values, Figure 6 can be redrawn using a different parameter. Figure 7 shows

the variation of the output voltage with input DC voltage change. The output current is the parameter in

this case.

14

15

16

17

18

19

0

0.020.040.060.08

0.1

Output Current [A]

125VDC

150VDC

200VDC

250VDC

300VDC

350VDC

375VDC