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NCL30000
Performance Data for 90 to 305 Vac LED Driver
Shown below in Figure 31 is the line regulation and
efficiency with a 36.9 V, 12 LED load. Note the output
350
345
340
335
330
325
320
315
current does not vary much over the entire input voltage
range. The data is based on the use of an EFD25 transformer.
87%
86%
85%
84%
83%
82%
81%
80%
310
305
300
LED Current
Efficiency
79%
78%
77%
90
115
140 165 190 215 240 265 290
Input Voltage (Vac)
Figure 31. Output Current and Efficiency with 36.9 V Load
315
Power factor and Total Harmonic Distortion are shown in Figure 32 below.
20
18
16
14
12
10
8
6
4
1.00
0.99
0.98
0.97
0.96
0.95
0.94
0.93
0.92
2
0
THD
PF
0.91
0.90
90
115
140
165
190 215
Input Voltage (Vac)
240
265
290
315
Figure 32. THD and Power Factor with 36.9 V Load
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