Ceramic Capacitors minimize flicker in LED lighting.
Press Release Summary:
Incorporated in LED lighting circuits immediately following bridge rectification stage, GR3 and RDE Series provide DC smoothing and acoustic noise reduction. GR3 Series, for reflow soldering use, provides capacitance from 10-1,000 nF for 250 Vdc range, 560 nF for 450 Vdc, and 270 nF for 630 Vdc. For radial leaded insertion production, RDE Series features capacitances of 10 nF to 2.2 µF for 250 Vdc part, 1.2 µF for 450 Vdc, and 560 nF for 630 Vdc component.
Original Press Release:
Murata MLCC Reduces Flicker and Acoustic Noise in LED Lighting Applications
Hoofddorp, Netherlands: Murata today announced the introduction of a series of capacitors specifically designed to provide DC smoothing and acoustic noise reduction in LED lighting applications. As the market for LED lighting has steadily grown customers have recognized that a capacitive DC bias, that results in less actual capacitive value, and a piezo-electronic phenomenon within capacitors has been the cause of light flickering and acoustic noise. Previously, many designers have avoided the use of ceramic capacitors in LED lighting applications even though they have superior size and higher temperature reliability.
The GR3 and RDE series of multi layer ceramic capacitors (MLCC) have been designed by Murata to be incorporated in LED lighting circuits, immediately following the bridge rectification stage, to provide DC supply smoothing and EMI filtering. The GR3 family is for reflow soldering use and the RDE family provides radial leaded insertion production. Compared to standard ceramic capacitors, tests by Murata showed a 10dB reduction in acoustic noise by using the new GR3 MLCC capacitors. Further noise reductions are possible with the RDE leaded parts. Both families provide better DC bias and acoustic noise reduction performance than X7R series.
The GR3 is available in 250, 450 or 630 VDC rating and popular capacitances starting from 10nF and up to 1,000nF for the 250 VDC range, to 560nF for 450 VDC and 270nF for the 630 VDC. Package sizes for the GR3 series include 0805, 1206, 1210, 1812 and 2220. The RDE leaded series has the same voltage rating as the GR3 series with capacitances of 10nF to a maximum of 2.2uF for the 250 VDC part, 1.2uF for the 450 VDC, and 560nF for the 630 VDC component.
For further information and reader enquiries:
Aya Tonooka, Murata Electronics (UK) Ltd., Oak House, Ancells Road, Ancells Business Park, Fleet, Hampshire GU51 2QW , United Kingdom
Tel: +44 (0) 1252 811666
Fax: +44 (0) 1252 811777
Web: www.murata.eu
E-mail: ayatonooka@murata.co.uk
About Murata
Murata is a leading manufacturer of electronic components, modules, and devices. The complete range of this Ceramics Technology house includes ceramic capacitors, resistors/thermistors, inductors/chokes, ceramic resonators, buzzers, sensors and EMI suppression filters. Whilst the company gets 40% of its revenue from its ceramic capacitor products, it is also the world leader in Bluetooth & WiFi Modules, and a key manufacturer of power supplies. Murata also designs and manufactures mobile handset antenna families, piezoelectric actuators for fuel injection systems, short focal length ceramic lenses and speaker products.
Established in 1944, Murata is headquartered in Japan and has European offices in Germany, the Netherlands, the UK, Switzerland, Italy, France, Spain, Denmark, Sweden, Finland and Hungary.
For more information on Murata, please visit: www.murata.eu
