Capacitors reduce flicker and acoustic noise in led lighting applications

The GR3 and RDE ranges have been designed to be incorporated in led lighting circuits immediately following the bridge rectification stage, to provide dc supply smoothing and EMI filtering. According to the company, the GR3 series is optimised for reflow soldering use and the RDE family is designed to provide radial leaded insertion production. Compared to standard ceramic capacitors, tests by Murata showed a 10dB reduction in acoustic noise by using the new GR3 capacitors. The company says further noise reductions are possible with the RDE leaded parts and claims both families provide better dc bias and acoustic noise reduction performance than the X7R series.