AN3329
Application note
170 W power supply with PFC and standby supply for flat TV
using the L6564, L6599A, and Viper27LN
Introduction
This application note describes the characteristics and features of a 170 W, wide input
mains range, power-factor-corrected, demonstration board for flat TVs or industrial
applications. The electrical specifications are tailored to a typical flat TV.
The architecture is made up of three stages: a front-end PFC pre-regulator based on the
L6564 TM (transition mode) boost PFC controller and a downstream LLC resonant half
bridge converter stage, built around the new L6599A resonant controller, which provides two
regulated output voltages at 12 V and 24 V. In addition, a flyback-based standby supply
delivers 10 W to a 5 V output. Thanks to the chipset used, this design achieves very high
efficiency, compliant with ENERGY STAR
®
eligibility criteria (EPA rev. 2.0 EPS), as well as
very low input consumption during standby operation.
Figure 1.
EVL170W-FTV: 170 W demonstration board
February 2011
Doc ID 18376 Rev 1
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www.st.com
List of figures
AN3329
List of figures
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EVL170W-FTV: 170 W demonstration board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Electrical diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Overall efficiency vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Average efficiency acc. ES-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Standby supply efficiency vs. output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Standby supply efficiency vs. light load output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
EN61000-3-2 compliance at 230 Vac - 50 Hz, full load . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
JEITA-MITI compliance at 100 Vac - 50 Hz, full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
EN61000-3-2 compliance at 230 Vac - 50 Hz, 75 W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
JEITA-MITI compliance at 100 Vac - 50 Hz, 75 W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Input voltage and current at 100 Vac, full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Input voltage and current at 230 Vac, full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Standby supply waveforms at 115 Vac - 60 Hz, full load . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Standby supply waveforms at 230 Vac - 50 Hz, full load . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Standby supply waveforms at 400 Vdc, full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Standby supply output rectifiers PIV at 400 Vdc, full load . . . . . . . . . . . . . . . . . . . . . . . . . 14
Standby supply 5 V ripple at 115 Vac - 60 Hz, full load . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Standby supply startup at 115 Vac - 60 Hz, full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Standby supply burst mode operation at 230 Vac - 50 Hz - 10 mA load . . . . . . . . . . . . . . 15
Standby supply burst mode operation at 230 Vac - 50 Hz - 10 mA load-detail . . . . . . . . . 15
Standby supply OVP at 115 Vac - 60 Hz, full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Standby supply OVP at 230 Vac - 50 Hz - 0.5 A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Standby supply OVP at 115 Vac - 60 Hz - PFC on - 1 A . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Standby supply OVP at 115 Vac - 60 Hz - PFC on - 1 A . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Standby supply output short-circuit at 230 Vac - 50 Hz, full load . . . . . . . . . . . . . . . . . . . . 16
Standby supply output short-circuit at 230 Vac - 50 Hz, full load - detail . . . . . . . . . . . . . . 16
Standby supply dynamic load at 115 Vac - 60 Hz - PFC off . . . . . . . . . . . . . . . . . . . . . . . . 17
Standby supply dynamic load at 115 Vac - 60 Hz - PFC on . . . . . . . . . . . . . . . . . . . . . . . . 17
PFC Vds and inductor current at 115 Vac - 60 Hz, full load . . . . . . . . . . . . . . . . . . . . . . . . 18
PFC Vds and inductor current at 115 Vac - 60 Hz, full load - detail . . . . . . . . . . . . . . . . . . 18
PFC Vds and inductor current at 230 Vac - 50 Hz, full load . . . . . . . . . . . . . . . . . . . . . . . . 19
PFC Vds and inductor current at 230 Vac - 50 Hz, full load - detail . . . . . . . . . . . . . . . . . . 19
L6564 signals-1 at 115 Vac - 60 Hz, full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
L6564 signals-2 at 115 Vac - 60 Hz, full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
PFC signals-1 at 115 Vac - 60 Hz, full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
PFC signals-2 at 115 Vac - 60 Hz, full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Resonant stage waveforms at 115 V - 60 Hz, full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Resonant stage waveforms at 115 V - 60 Hz, full load . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Output rectifiers PIV waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
No load operation at 115 Vac - 60 Hz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
No load operation at 115 Vac - 60 Hz - L6599A signals . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
12 V - 2 A; 24 V 0 ÷ 6 A transition at 115 Vac - 60 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
24 V - 6 A; 12 V 0 ÷ 2 A transition at 115 Vac - 60 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
12 V - 2 A; 24 V 0 ÷ 6 A - 300 Hz transition at 115 Vac - 60 Hz . . . . . . . . . . . . . . . . . . . . . 24
24 V - 6 A; 12 V 1 ÷ 2 A - 300 Hz transition at 115 Vac - 60 Hz . . . . . . . . . . . . . . . . . . . . . 24
12 V short-circuit at full load and 115 Vac - 60 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
12 V short-circuit at full load and 115 Vac - 60 Hz - detail . . . . . . . . . . . . . . . . . . . . . . . . . 25
24 V short-circuit at full load and 115 Vac - 60 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
24 V short-circuit at full load and 115 Vac - 60 Hz - detail . . . . . . . . . . . . . . . . . . . . . . . . . 25
Doc ID 18376 Rev 1
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List of figures
Startup by on-off signal at full load and 115 Vac - 60 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Startup by on-off signal at full load and 115 Vac - 60 Hz - L6599A signals . . . . . . . . . . . . 26
Startup by on/off signal at full load and 115 Vac - 60 Hz O/P voltage rising . . . . . . . . . . . 27
Turn-off at full load and 115 Vac - 60 Hz by on/off signal . . . . . . . . . . . . . . . . . . . . . . . . . . 27
OVP at full load and 115 Vac - 60 Hz on 12 V - 24 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
OVP at full load and 115 Vac - 60 Hz on 12 V - 24 V - outputs detail . . . . . . . . . . . . . . . . 27
Half cycle mains dip at full load and 115 Vac - 60 Hz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Full cycle mains dip at full load and 115 Vac - 60 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
CE peak measurement at 115 V - 60 Hz and full load - phase wire . . . . . . . . . . . . . . . . . . 29
CE peak measurement at 115 V - 60 Hz and full load - neutral wire . . . . . . . . . . . . . . . . . 29
CE peak measurement at 230 V - 50 Hz and full load - phase wire . . . . . . . . . . . . . . . . . . 30
CE peak measurement at 230 V - 50 Hz and full load - neutral wire . . . . . . . . . . . . . . . . . 30
PFC coil electrical diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
PFC coil mechanical aspect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Transformer overall drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Transformer electrical diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Transformer construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Mechanical aspect and pin numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Mechanical aspect and pin numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
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