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IRPLDIM1U

IR21592 Dimming Ballast Control IC Design Kit

International Rectifier 

Electrical Characteristics

Parameter

Lamp Type

Input Power (100%)

Input Current (100%)

Filament Preheat Current

Preheat Mode Lamp Voltage

Preheat Time

Input AC Voltage Range

Input DC Voltage Range

Power Factor

Total Harmonic Distortion

Maximum Output Voltage

Units

[W]

[Arms]

[Arms]

[Vrms]

[s]

[VACrms]

[VDC]

[%]

[Vpk]

Value (IRPLDIM1U)

32W T8

32

0.27

0.6

220

1.0

90..140/50..60Hz

100..180

0.99

<10

750

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

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

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.

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