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IR21571 Ballast Control IC Design Kit

Features

= Drives:

1 x 32W T8 Lamp (IRPLLNR2U)

1 x 36W T8 Lamp (IRPLLNR2)

= Input:

90-140VAC/60Hz (IRPLLNR2U)

185-265VAC/50Hz (IRPLLNR2)

= High Power Factor/Low THD

= High Frequency Operation (42kHz)

= Lamp Filament Preheating

= Lamp Fault Protection with Auto-Restart

= Brownout Protection

= IR21571 HVIC Ballast Controller

Description

The IRPLLNR2 is a high efficiency, high power factor, fixed output

electronic ballast designed for driving rapid start fluorescent lamp types. The design contains an EMI

filter, active power factor correction and a ballast control circuit using the IR21571. This demo board is

intended to ease the evaluation of the IR21571 Ballast Control IC, demonstrate PCB layout techniques

and serve as an aid in the development of production ballast’s using the International Rectifier IR21571.

Ballast Block Diagram

EMI Filter

Rectifier

PFC

Half-Bridge

Output Stage

Line

Lamp

PFC Control

IR21571

UVLO

Lamp Fault

International Rectifier

• 233 Kansas Street, El Segundo, CA 90245 USA

IRPLLNR2