AN2640 Datasheet, PDF (31/36 Pages) STMicroelectronics – Intelligent multipower digital ballast for fluorescent lamps

AN2640
Board description
6.3.2
PF, THD and ballast efficiency
The power factor, total harmonic distortion of current and ballast efficiency are measured
and the results are shown in Table 4, 5, 6, and 7.
Table 4. 24 W lamp power
Mains
PF
THD
η%
185 V at 50 Hz
0.968
17.6
88.2
230 V at 50 Hz
0.949
20.0
89.3
265 V at 50 Hz
0.923
22.0
89.9
Table 5. 39 W lamp power
Mains
PF
THD
η%
185 V at 50 Hz
0.983
13.5
90.4
230 V at 50 Hz
0.970
15.7
90.6
265 V at 50 Hz
0.956
17.4
90.6
Table 6. 54 W lamp power
Mains
PF
THD
η%
185 V at 50 Hz
0.989
11.3
94.1
230 V at 50 Hz
0.982
13.0
94.4
265 V at 50 Hz
0.972
14.4
94.6
6.3.3
Table 7. 80 W lamp power
Mains
PF
THD
η%
185 V at 50 Hz
0.992
10.9
97.6
230 V at 50 Hz
0.988
11.1
98.0
265 V at 50 Hz
0.980
14.6
98.2
Electromagnetic compatibility
The EMC tests have been performed according to the EN55015 standard (Limits and
methods of measurement of radio disturbance characteristics of electrical lighting and
similar equipment).
The Agilent E7401A EMC Analyzer has been used as test equipment.
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