AN2521

List of figures

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List of figures

Figure 1.

L6668 and L6563-75W adapter evaluation board (EVAL6668-75W) . . . . . . . . . . . . . . . . . . 1

Figure 2.

Electrical diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 3.

EVAL6668-75W global efficiency measurements at full load . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 4.

L6563 tracking boost and voltage feed-forward blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 5.

EVAL6668-75W PFC output voltage vs. ac input voltage . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 6.

PFC efficiency with and without TBO function at full load . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 7.

Flyback converter efficiency with and without TBO function at full load . . . . . . . . . . . . . . . 10

Figure 8.

Comparison between the global efficiency with and without TBO . . . . . . . . . . . . . . . . . . . 11

Figure 9.

EVAL6668-75W compliance to EN61000-3-2 standard @230 V, 50 Hz - full load . . . . . . 11

Figure 10.

EVAL6668-75W compliance to JEIDA-MITI standard @100 V, 60 Hz - full load . . . . . . . . 11

Figure 11.

EVAL6668-75W compliance to EN61000-3-2 standard @230 V, 50 Hz - half load . . . . . 12

Figure 12.

EVAL6668-75W compliance to JEIDA- MITI standard @100 V, 60 Hz - half load . . . . . . . 12

Figure 13.

EVAL6668-75W input current waveform @100 V, 60 Hz - full load . . . . . . . . . . . . . . . . . . 12

Figure 14.

EVAL6668-75W input current waveform @230 V, 50 Hz - full load . . . . . . . . . . . . . . . . . . 12

Figure 15.

EVAL6668-75W flyback stage waveforms @115 V, 60 Hz-full load. . . . . . . . . . . . . . . . . . 13

Figure 16.

EVAL6668-75W flyback stage waveforms @230 V, 50 Hz-full load. . . . . . . . . . . . . . . . . . 13

Figure 17.

Adapter circuit primary side waveforms 265 V, 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 18.

EVAL6668-75 W no-load operation waveforms @90 V, 60 Hz . . . . . . . . . . . . . . . . . . . . . 14

Figure 19.

EVAL6668-75 W no-load operation waveforms @265 V, 50 Hz . . . . . . . . . . . . . . . . . . . . 14

Figure 20.

EVAL6668-75 W transition full load-to-no load at 265 V, 50 Hz . . . . . . . . . . . . . . . . . . . . . 15

Figure 21.

EVAL6668-75 W transition no load-to-full load at 265 V, 50 Hz . . . . . . . . . . . . . . . . . . . . . 15

Figure 22.

EVAL6668-75 W short circuit at full load & 230 Vac-50 Hz . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 23.

EVAL6668-75 W short circuit removal at full load & 230 Vac-50 Hz . . . . . . . . . . . . . . . . . 17

Figure 24.

EVAL6668-75 W short circuit at no-load & 230 Vac-50 Hz . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 25.

EVAL6668-75 W short circuit removal at no-load & 230 Vac-50 Hz. . . . . . . . . . . . . . . . . . 18

Figure 26.

EVAL6668-75W Open loop at 115 Vac-60 Hz - full load . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 27.

Thermal map at 115 Vac-60 Hz - full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 28.

Thermal map at 230 Vac-50 Hz - full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 29.

CE peak measure at 100 Vac and full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 30.

CE peak measure at 230 Vac and full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 31.

Electrical diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 32.

Mechanical aspect and pin numbering of PFC coil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 33.

Electrical diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 34.

Winding position on coil former. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 35.

Mechanical aspect and pin numbering of flyback transformer . . . . . . . . . . . . . . . . . . . . . . 32