LT-101A User’s Manual
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test the input and output of the LED driver simultaneously.
2.3 Main functions
2.3.1 Steady state characteristics test of LED drivers
The test mode for input and output characteristics at steady state can be set in RMS or
DC individually, and it also has power-down protection function.
(1) Input characteristics test
The input electrical quantities measured of LED drivers at steady state include RMS
values of voltage and current, peak values of voltage and current, total harmonic
distortion of voltage and current, harmonic current at one watt, frequency, active
power, power factor, waveform of voltage and current, the initial phase, peak phase
and end phase of current. The order of harmonic analysis can be up to 50 times.
(2) Output characteristics test
The output electrical quantities measured of LED drivers at steady state including
voltage, current, active power, frequency and power efficiency.
2.3.2 Start-up characteristics test of LED drivers
(1) Input characteristics test
Measure the input peak values of voltage and current at 0~40ms after starting LED
drivers. The software can draw the curves of voltage and current during this time to
calculate and display the start-up time according to related standards .
(2) Output characteristics test
Measure the Max.Voltage, Max.Current and the time to Max.Current within 0~3s
from startup. The software provides two testing modes: conventional start-up mode
and transient start-up mode. Under conventional start-up mode, it can draw the 0~3s
start-up curves of voltage and current; while under transient start-up mode, it can
draw the 0~40ms start-up curves of voltage and current.
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