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AN4376 Scheda tecnica(PDF) 4 Page - STMicroelectronics

Il numero della parte AN4376
Spiegazioni elettronici  10 W wide range non-isolated high power factor LED driver using HVLED815PF
PDF  37 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4376 Scheda tecnica(HTML) 4 Page - STMicroelectronics

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List of figures
AN4376
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DocID025380 Rev 1
List of figures
Figure 1.
EVLHVLED815W10A demonstration board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2.
Flyback (FL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3.
Buck-boost topology (BB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 4.
TM (transition mode) flyback currents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 5.
TM (transition mode) buck-boost currents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 6.
TM (transition mode) flyback waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 7.
TM (transition mode) buck-boost waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 8.
ILED pin modulation with the input mains voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 9.
EVLHVLED815W10A demonstration board schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 10.
Top side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 11.
Bottom side. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 12.
LED current vs. AC line voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 13.
Power factor vs. AC line voltage at nominal load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 14.
Total harmonic distortion vs. AC line voltage at nominal load . . . . . . . . . . . . . . . . . . . . . . 17
Figure 15.
Efficiency vs. AC line voltage at nominal load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 16.
Line regulation at different LED load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 17.
Power factor versus AC line voltage at different LED load . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 18.
THD versus AC line voltage at different LED load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 19.
Efficiency versus AC line voltage at different LED load . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 20.
Input and output PFC waveforms at 100 VAC - 50 Hz - PF = 0.9889 . . . . . . . . . . . . . . . . 23
Figure 21.
Input and output PFC waveforms at 230 VAC - 50 Hz - PF = 0.9211 . . . . . . . . . . . . . . . . 23
Figure 22.
Transition mode operation at 100 VAC - 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 23.
Transition mode operation at 100 VAC - 50 Hz -zoom of signals . . . . . . . . . . . . . . . . . . . . 24
Figure 24.
Transition mode operation at 230 VAC - 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 25.
Transition mode operation at 230 VAC - 50 Hz - zoom of signals . . . . . . . . . . . . . . . . . . . 24
Figure 26.
ILED pin operation at 85 VAC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 27.
ILED pin operation at 100 VAC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 28.
ILED pin operation at 130 VAC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 29.
ILED pin operation at 175 VAC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 30.
ILED pin operation at 230 VAC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 31.
ILED pin operation at 265 VAC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 32.
Startup at 100 VAC - 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 33.
Startup at 230 VAC - 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 34.
Load disconnection at 100 VAC - 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 35.
No load behavior at 100 VAC - 50 Hz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 36.
Load disconnection at 230 VAC - 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 37.
No load behavior at 230 VAC - 50 Hz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 38.
Short-circuit of the output connector at 100 VAC - 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 39.
Short-circuit removal at 100 VAC - 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 40.
Short-circuit of the output connector at 230 VAC - 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 41.
Short-circuit removal at 230 VAC - 50 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 42.
Top side thermal map with 23 LED load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 43.
Bottom side thermal map with 23 LED load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 44.
Top side thermal map with 25 LED load - 10.5 W output . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 45.
Bottom side thermal map with 25 LED load - 10.5 W output . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 46.
Measurement at 100 VAC, 50 Hz, PIN = 10.95 W, POUT = 9.5 W, PF = 0.9880. . . . . . . . . 34
Figure 47.
Measurement at 230 V, 50 Hz, PIN = 10.88 W, POUT = 9.48 W, PF = 0.9220 . . . . . . . . . . 34
Figure 48.
100 VAC and 23 LED load - phase. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35



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