AN3407

List of figures

Doc ID 018857 Rev 1

3/25

List of figures

Figure 1.

STEVAL-ILL038V1 demonstration board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2.

Application example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Figure 3.

Multiplier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 4.

Oscillator characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 5.

Half-bridge protection thresholds during run mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 6.

Electrical schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 7.

STEVAL-ILL038V1 demonstration board: efficiency vs. load . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 8.

STEVAL-ILL038V1 demonstration board: full-load efficiency vs. VAC . . . . . . . . . . . . . . . . 10

Figure 9.

STEVAL-ILL038V1 demonstration board: power factor vs. load . . . . . . . . . . . . . . . . . . . . 10

Figure 10.

EN61000-3-2 Class-D standard - 185 VAC/50 Hz, THD=4.86%, PF=0.993 at full load . . . 11

Figure 11.

EN61000-3-2 Class-D standard - 230 VAC/50 Hz, THD=5.98%, PF=0.980 at full load . . . 11

Figure 12.

Input current waveforms - full load at 115 VAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 13.

Input current waveforms - full load at 230 VAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 14.

PFC stage waveforms at 115 VAC - full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 15.

PFC stage waveforms at 230 VAC - full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 16.

PFC stage waveforms at 115 VAC - full load - detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 17.

PFC stage waveforms at 230 VAC - full load - detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 18.

Primary side LLC waveforms at

115 VAC - full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 19.

Secondary side LLC waveforms at 230 VAC - full load . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 20.

High-frequency ripple on output voltage at 115 VAC - 60 Hz - full load . . . . . . . . . . . . . . . 15

Figure 21.

Low-frequency ripple on output voltage at 115 VAC - 60 Hz - full load . . . . . . . . . . . . . . . 15

Figure 22.

Wake-up at 115 VAC - 60 Hz - full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 23.

Wake-up at 230 VAC - 60 Hz - full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 24.

PCB: topside and through-hole components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 25.

PCB: bottomside and SMD components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 26.

PCB: topside placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 27.

PCB: bottomside placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 28.

EMI: OTC21V-4S vertical type EMI choke . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 29.

PFC: QP2520V-vertical type for PFC choke. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 30.

Transformer: LP2920H - horizontal type for LLC transformer. . . . . . . . . . . . . . . . . . . . . . . 22