irplmb1e| Application Note
IRPLMB1E
International Rectifier 233 Kansas Street, El Segundo, CA 90245 USA
IRPLMB1E - 25W 230VAC small size ballast using IR2520D
By
Cecilia Contenti
Topics Covered
Overview Features Electrical Characteristics IR2520D Ballast Control IC Circuit Description Miniballast Circuit Diagram Functional Description Fault Conditions Miniballast Layout Design Tip: AUto-restart Option Design Procedure to adapt the design to different lamp types
1. Overview
Small sizes ballasts (often called Matchbox ballasts) are becoming very common in Europe to drive a wide range of lamps with power between 18W and 26W like PLC 18W, PLT 18W, TC-L 18W, TC-L 24W, TC-F 18W, TC-F 24W, TC-DEL/TEL 26W, T5 24W, T8 18W, T5C 22W and TR 22W. Limiting the maximum power to 25W the design does not need to conform to THD and PF requirements and this allows saving the PFC stage reducing the components count and maintaining a very small size. The MINIBALLAST1 is an electronic ballast for driving 26W compact fluorescent lamps from 220VAC. 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 ballast size is 36mmx55mm. The circuit is built around the IR2520D Ballast Control IC. The IR2520D provides adjustable preheat time, adjustable run frequency to set the lamp power, high starting frequency for soft start and to avoid lamp flash, fault protection for open filament condit
ion and failure to strike, low AC line protection and auto-restart after line brownout conditions. The IR2520D is a low-cost solution with only 8 pins and allows the component count for the complete solution to be reduced down to 19 components.
1
irplmb1e Application Note irf Download PDF
Add this permalink to your bookmarks for future download of irplmb1e ApplicationNote
Permalink: http://application.emcelettronica.com/irf/irplmb1e
