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AN2708 Fiches technique(PDF) 23 Page - STMicroelectronics

No de pièce AN2708
Description  2X36 W digital dimmable ballast with L6574 and ST7FDALI
PDF  42 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2708 Fiches technique(HTML) 23 Page - STMicroelectronics

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AN2708
High-frequency ballast
23/42
Figure 16.
Lamps running at 230 Vac - full power
The efficiency of the system is a little bit lower than a standard HF ballast due to the supply
section of the slave and the resistors in series to the lamp’s cathode used to ensure a
minimum current at low dimming level.
Table 9.
Ballast performances
Vin (Vac)
Pin (W)
PF
THD (%)
Po (W)
η(%)
90
76.5
0.999
3.9
66
86.2
110
75.5
0.999
3.6
66
87.4
140
74.2
0.998
5.5
66
89
176
73.7
0.997
7.2
66
90
230
73
0.997
7.3
66
90
265
72.8
0.996
8.3
66
91
CH1 (yellow): lamp1 voltage
CH2 (blue): lamp1 current
Ch3 (magenta): lamp2 voltage
CH4 (green): lamp2 current



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