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Designing 45W flasher with short circuit protection

Posted: 14 Aug 2014     Print Version  Bookmark and Share

Keywords:Automobile  flashers  electromechanical  flasher circuit  short circuit protection 

Automobiles use flashers for turn indications. Traditionally such control has been through electromechanical devices. However, the same functionality can be implemented using electronics at a fraction of the cost.

This design proposes such a scheme, which can be used for a load of 45 W. This application note presents the design of a low cost, flasher circuit with short circuit protection. The design incorporates the entire recommended design feature set for two wheeler flashers and includes low/high voltage operation, half load frequency doubling, and short circuit protection.

View the PDF document for more information.

Originally published by Texas Instruments Inc. at as "Design of a Low Cost, 45W Flasher with Short Circuit Protection Using LM2902 (Quad Op-Amp) and CSD18534".

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