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Electrical Characteristics
Parameter
Lamp Type
Input Power
Input Current
Preheat Mode Frequency
Preheat Mode Lamp Voltage
Preheat Time
Ignition Ramp Mode Frequency
Run Mode Frequency
Lamp Run Current
Input AC Voltage Range
Input DC Voltage Range
Power Factor
Total Harmonic Distortion
Maximum Output Voltage
Units
[W]
[Arms]
[kHz]
[Vrms]
[s]
[kHz]
[kHz]
[Arms]
[VACrms]
[VDC]
[%]
[Vpk]
Value (IRPLLNR2)
36W T8
36
0.300
44
220
0.9
38
42
0.34
185..255/50..60Hz
250..350
0.98
<15
600
Value (IRPLLNR2U)
32W T8
32
0.300
44
220
0.6
38
42
0.34
90..140/50..60Hz
100..180
0.99
<10
600
Note: Measurements performed with input AC line voltage = 120Vrms (IRPLDIM1U)
230Vrms (IRPLDIM1)
Fault Protection Characteristics
Fault
Line voltage low
Upper filament broken
Lower filament broken
Failure to ignite
Open circuit (no lamp)
Ballast
Deactivates
Deactivates
Deactivates
Deactivates
Deactivates
Restart Operation
Increase line voltage
Lamp exchange
Lamp exchange
Lamp exchange
Lamp exchange
Functional Description
Overview
he IRPLDIM1 Demo Board consists of an EMI filter, an active power factor correction front end, a
ballast control section and a resonant lamp output stage. The active power factor correction section
is a boost converter operating in critical mode conduction, free-running frequency mode. The ballast
control section provides frequency modulation control of a traditional RCL lamp resonant output
circuit and is easily adaptable to a wide variety of lamp types. The ballast control section also pro-
vides the necessary circuitry to perform closed-loop dimming, lamp fault detection, shutdown and
auto-restart. All functional descriptions refer to the IRPLDIM1 schematic diagram.
2
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