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Renesas tool simplifies design of LED lamp control circuits

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By eeNews Europe


Renesas said it plans to increase production of the R2A20134 LED driver IC to 10 million units per month in 2014, backed by the system design support provided by the new R2A20134EVB design support tool.

The market for LED lighting is expected to grow substantially moving forward, with the replacement of incandescent light bulbs playing a central role. With this market in mind Renesas Electronics launched development work on LED driver IC devices that are designed to be incorporated into LED lamps and perform functions such as on-off switching and dimming of the LEDs. The R2A20134, announced in December 2010 and entering mass production in March 2011, achieves improved conversion efficiency when commercial AC power is converted to DC and used to drive the LEDs while also helping reduce the overall system cost. The new R2A20134EVB design support tool for the R2A20134 simplifies the design of complex LED drive IC control circuits, enabling customers to realize highly efficient control circuits that extract the full potential of the R2A20134.

A variety of circuit configurations can be used for DC drive of LEDs, but they can generally be divided into the following broad categories: electrically isolated configurations employing transformers, non-isolated configurations employing inductors, and configurations with or without support for TRIAC dimmers. The six product versions of the R2A20134EVB correspond to these various configurations, so the customer can choose the one that matches the intended application.

For improved usability, the new design support tool come bundled with application notes containing board description and evaluation files, parts lists, etc., and a supplementary tool for setting external constants.

The features of the R2A20134 LED driver IC, which is mounted on the design support tool, are as follows:

  • Contributes to reduced system cost. LED driver MOSFETs typically have a voltage tolerance of 700 V, but the R2A20134 enables use of MOSFETs with tolerances in the 500 V to 300 V range. This contributes to lower system cost overall.
  • High efficiency and high power factor. The R2A20134 delivers efficiency of 92 percent and a power factor of 0.94, both among the highest in the industry, contributing to greater power savings.

Renesas will present its lighting portfolio at Strategies in Light Europe 2011 in September in Milan.


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