AN4164 datasheet(5/38 Pages) STMICROELECTRONICS

5 / 38 page

AN4164

List of figures

Doc ID 023660 Rev 1

5/38

List of figures

Figure 1.

Demonstration board image . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2.

Application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 3.

VDD waveforms IC externally biased (J1 selected) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 4.

VDD waveforms IC self-biased (J1 not selected) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 5.

Transformer, pin distances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 6.

Transformer, electrical diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 7.

Transformer side view 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 8.

Transformer side view 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 9.

Drain current/voltage at 115 Vac, max. load. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 10.

Drain current/voltage at 230 Vac, max. load. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 11.

Drain current/voltage at 90 Vac, max. load. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 12.

Drain current/voltage at 265 Vac, max. load. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 13.

Line regulation, IC externally biased (J1 selected) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 14.

Line regulation, IC self-biased (J1 not selected) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 15.

Load regulation, IC externally biased (J1 selected) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 16.

Load regulation, IC self-biased (J1 not selected). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 17.

Output voltage ripple at 115 VAC no load. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 18.

Output voltage ripple at 230 VAC no load. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 19.

Output voltage ripple at 115 VAC 25 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 20.

Output voltage ripple at 230 VAC 25 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 21.

Active mode efficiency of the demonstration board and comparison

with energy efficiency standards (IC externally biased) . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 22.

PIN vs. VIN at no load and light load; IC externally biased (J1 selected) . . . . . . . . . . . . . . 17

Figure 23.

PIN vs. VIN at no load and light load, IC self-biased (J1 not selected) . . . . . . . . . . . . . . . . 17

Figure 24.

Efficiency at PIN = 1 W; IC externally biased (J1 selected) . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 25.

Efficiency at PIN = 1 W; IC self biased (J1 not selected) . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 26.

PIN at POUT = 250 mW; IC externally biased (J1 selected) . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 27.

PIN at POUT = 250 mW; IC self biased (J1 not selected) . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 28.

Soft-start @ startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 29.

Soft-start @ startup (zoom) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 30.

OLP short-circuit applied: OLP tripping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 31.

Output short-circuit maintained: OLP steady-state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 32.

Output short-circuit maintained: OLP steady-state (zoom) . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 33.

Output short-circuit removal and converter restart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 34.

Feedback loop failure protection: tripping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 35.

Feedback loop failure protection: steady-state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 36.

Feedback loop failure protection: steady-state, zoom . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 37.

Feedback loop failure protection: converter restart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 38.

Control loop block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 39.

Thermal measurement at VIN = 90 VAC, full load, IC externally biased . . . . . . . . . . . . . . . 26

Figure 40.

Thermal measurement at VIN = 115 VAC, full load, IC externally biased . . . . . . . . . . . . . . 26

Figure 41.

Thermal measurement at VIN = 230 VAC, full load, IC externally biased . . . . . . . . . . . . . . 27

Figure 42.

Thermal measurement at VIN = 265 VAC, full load, IC externally biased . . . . . . . . . . . . . . 27

Figure 43.

Thermal measurement at VIN = 90 VAC, Iout = 310 mA, IC self biased . . . . . . . . . . . . . . . 27

Figure 44.

Thermal measurement at VIN = 115 VAC, Iout = 310 mA, IC self biased . . . . . . . . . . . . . . 28

Figure 45.

Thermal measurement at VIN = 230 VAC, full load, IC self biased . . . . . . . . . . . . . . . . . . . 28

Figure 46.

Thermal measurement at VIN = 265 VAC, full load, IC self biased . . . . . . . . . . . . . . . . . . . 28

Figure 47.

Average measurements at full load, TAMB=25 ×C, 115 VAC, IC externally biased . . . . . . 29

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