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Charge Pump Drives up to Six LEDs

Sun, 03/16/2008 - 1:49pm

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Catalyst Semiconductor, Inc. introduced the CAT3637 fractional charge pump LED drivers which address the requirements for high-efficiency and easy LED programming in portable devices.Catalyst Semiconductor, Inc. introduced the CAT3637 fractional charge pump LED drivers which address the requirements for high-efficiency and easy LED programming in portable devices. It is optimized for applications with one bank of five or six identical LED channels, a typical configuration for larger LED screen portable products. It incorporates a simplified version of the company’s 1-wire EZDim interface, which supports 16 output power levels, from from zero to 30 mA full brightness 2 mA resolution steps. The device boasts efficiency levels as high as 92 percent, no added capacitors required, and a tiny 3 mm x 3 mm, low-profile TQFN package. The CAT3637 LED driver is priced at $0.82 each in 10,000 piece quantities.  Samples and evaluation boards are also available.  Projected lead-time for production quantities is currently 6 to 8 weeks ARO.

Catalyst Semiconductor, Inc.
408-542-1000, www.catsemi.com

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