List of figures

AN4214

4/37

DocID023991 Rev 1

List of figures

Figure 1.

Block diagram of L6564 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 2.

Output voltage setting, OVP and FFP functions: internal block diagram . . . . . . . . . . . . . . . 7

Figure 3.

Input OVP protection network to bias PFC_OK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 4.

Voltage feedforward: squarer-divider (1/V2) block diagram and transfer characteristic . . . . 9

Figure 5.

L6562A and L6564 comparison (package and features) . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 6.

Transformer construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 7.

Current THD vs. mains voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 8.

Power factor vs. mains voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 9.

Full load efficiency vs. mains voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 10.

Ch: 4-input voltage; Ch: 2-input current waveforms at 140 Vac . . . . . . . . . . . . . . . . . . . . . 14

Figure 11.

Ch: 4-input voltage; Ch: 2-input current waveforms at 190 Vac . . . . . . . . . . . . . . . . . . . . . 15

Figure 12.

Ch: 4-input voltage; Ch: 2-input current waveforms at 220 Vac . . . . . . . . . . . . . . . . . . . . . 15

Figure 13.

Ch: 4-input voltage; Ch: 2-input current waveforms at 265 Vac . . . . . . . . . . . . . . . . . . . . . 16

Figure 14.

Ch: 2-output load current waveform at 220 Vac pk-pk current ripple = 112 mA . . . . . . . . . 17

Figure 15.

Ch: 4-drain-source voltage; Ch: 1-drain current; Ch: 2-COMP at 140 Vac . . . . . . . . . . . . . 18

Figure 16.

Ch: 4-drain-source voltage; Ch: 1-drain current; Ch: 2-COMP at 140 Vac (zoom view) . . . 18

Figure 17.

Ch: 4-drain-source voltage; Ch: 1-drain current; Ch: 2-COMP at 230 Vac . . . . . . . . . . . . . 19

Figure 18.

Ch: 4-drain-source voltage; Ch: 1-drain current; Ch: 2-COMP at 230 Vac (zoom view) . . . 19

Figure 19.

Ch: 4-drain-source voltage; Ch: 1-drain current; Ch: 2-COMP at 265 Vac . . . . . . . . . . . . 20

Figure 20.

Figure 21.

Output short-circuit at 140 Vac. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Figure 22.

Output short-circuit at 140 Vac (zoom view 1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 23.

Output short-circuit at 140 Vac (zoom view 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 24.

Output short-circuit at 230 Vac. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Figure 25.

Output short-circuit at 230 Vac (zoom view 1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 26.

Output short-circuit at 230 Vac (zoom view 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 27.

Output short-circuit at 265 Vac. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Figure 28.

Output short-circuit at 265 Vac (zoom view 1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Figure 29.

Output short-circuit at 265 Vac (zoom view 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Figure 30.

No load waveforms at 140 Vac . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Figure 31.

No load waveforms at 265 Vac . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Figure 32.

Current THD at 150 Vac mains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 33.

Current THD at 190 Vac mains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 34.

Current THD at 230 Vac mains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 35.

Current THD at 265 Vac mains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 36.

Schematic of SMPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 37.

SEA05 internal circuit and its application in flyback topology . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 38.

SEA05 package and pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35