an-1062| Application Note
Application Note AN-1062
IRPLMB1E - 25W 230VAC Small Size Ballast Using IR2520D
By Cecilia Contenti
Table of Contents
Page Overview ..............................................................................................1 Features ...............................................................................................2 Electrical Characteristics ......................................................................2 IR2520D Ballast Control IC ..................................................................2 Circuit Description ................................................................................3 Miniballast 1 Bill of Materials ................................................................4 Functional Description .........................................................................5 Fault Conditions ...................................................................................6 Open Filaments Protection...................................................................7 Low AC Line Protection .......................................................................8 Miniballast Layout ....
............................................................................9 Design Tip: Auto Restart Option...........................................................11 Different Procedure to Adapt the Design..............................................12
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.
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