IRPLCFL5U Datasheet, PDF (1/15 Pages) International Rectifier – CFL Ballast for 26W/Spiral Lamp, 120VAC Input

IRPLCFL5U
International Rectifier • 233 Kansas Street, El Segundo, CA 90245 ^! USA
CFL Ballast for 26W/Spiral Lamp, 120VAC Input
By Cecilia Contenti
TOPICS COVERED
Overview
Features
Electrical Characteristics
IR2520D Ballast Control IC
Circuit Description
Functional Description
Fault Conditions
RPLCFL5U Layout
Design Procedure to adapt the
design to different lamp types
1. Overview
The IRPLCFL5U reference design is an electronic ballast for driving 26W compact fluorescent
lamps from 120VAC. The circuit provides all of the necessary functions for preheat, ignition and on-
state operation of the lamp and also includes the EMI filter and the rectification stage. The circuit is
built around the IR2520D Ballast Control IC. The IR2520D provides adjustable preheat time, adjust-
able run frequency to set the lamp power, high starting frequency for soft start and to avoid lamp
flash, fault protection for open filament condition and failure to strike, low AC line protection and
auto-restart after line brownout conditions. The IR2520D is a low-cost solution specific for CFL
applications. The IR2520D has only 8 pins and allows the component count for the complete ballast
to be reduced down to 20 components.
2. Features
Programmable run frequency
Programmable preheat time
Open filaments and no-lamp protection
Failure to Strike and deactivated-lamp protection
Low AC line protection
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