2

www.irf.com

Electrical Characteristics

Note: Measurements performed with input AC line voltage = 120Vrms

Fault

Ballast

Restart Operation

Line voltage low

Deactivates

Increase line voltage

Upper filament broken

Deactivates

Lamp exchange

Lower filament broken

Deactivates

Lamp exchange

Failure to ignite

Deactivates

Lamp exchange

Open circuit (no lamp)

Deactivates

Lamp exchange

Fault Protection Characteristics

Fault Protection

Overview

The IRPLDIM1U 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 conduction mode , 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 IRPLDIM1U schematic diagram.

Parameter

Units

Lamp Type

Input Power (100%)

[W]

Input Current (100%)

[Arms]

Filament Preheat Current

[Arms]

Preheat Mode Lamp Voltage

[Vrms]

Preheat Time

[s]

Input AC Voltage Range

[VACrms]

Input DC Voltage Range

[VDC]

Power Factor

Total Harmonic Distortion

[%]

Maximum Output Voltage

[Vpk]

Value (IRPLDIM1U)

32W T8

32

0.27

0.6

220

1.0

90..140/50..60Hz

100..180

0.99

<10

750