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LED drivers target high-visual impact lighting apps

Posted: 18 Nov 2008 ?? ?Print Version ?Bookmark and Share

Keywords:LED driver? lighting application? RGB high-brightness?


ON Semiconductor has expanded its line of constant-current, low dropout driver products with two new high-brightness RGB LED pixel drivers.

The CAT4103 and CAT4109 are three-channel, linear-based constant-current LED drivers for RGB LED pixel control in emerging high-brightness, high-visual impact LED architectural lighting.

The CAT4103 is designed for high-end, multi-color, "intelligent" LED architectural lighting applications. It features a high-speed serial interface, which can support data rates up to 25MHz and offers fully buffered data outputs to ensure the highest data integrity is maintained over distributed (long distance), daisy-chained lighting systems.

The CAT4109 uses a parallel interface with each channel having a dedicated pulse-width modulation control, making it suitable for the more conventional LED visual effects applications, such as color-mixing and accent architectural lighting.

Both the CAT4103 and CAT4109 support a wide range of LED constant current drive of up to 175mA on each channel, with dropout levels down to 0.3V at 60mA. This ensures maximum performance in driving long strings of LEDs. With voltage compliance levels of 25V on each channel, these drivers are capable of supporting RGB pixels with brightness power levels in excess of 10W.

�Other features of the drivers include three independent constant-current sinks rated to 25V, set by external resistors and wide LED current range to 175mA per channel. The CAT4103 also provides buffered output to ensure data integrity for distributed lighting systems.

Pricing for the CAT4103 constant-current, low dropout driver is 65 cents each in 10,000-piece quantities. The CAT4109 is priced at 62 cents each in 10,000-piece quantities. Samples are available now. Projected lead-time for production quantities is currently six to eight weeks ARO.

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