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12
FEBFL77944_L80L012A_B
• Rev. 1.0
6.4.
Normal Operation
Table 7.
Normal Operation Waveform According to Variable Input Voltage and Frequency
108 V
AC
120 V
AC
132 V
AC
50Hz
60Hz
Figure 4.
Ch2: V
IN.ac
, 100 V/div, Ch4: I
IN.ac
50.0 mA/div
Table 7 shows the normal operation waveform of low-line without SVF evaluation board at the variable
input voltage with 50 / 60 Hz when no dimmer is connected. The condition of the LED 4 pin is turned on
when the input voltage is larger than at least all string LED forward voltage (35 V * 4 ea = 140 V). Also
the conduction time of the LED 4 pin is depend on the input voltage.