News Release from: Catalyst Semiconductor
Edited by the Electronicstalk Editorial Team on 18 October 2005
Drivers promise flexible backlight design
Optimised for mobile LED lighting and backlight applications, the CAT4x37 family operate down below 2.5V and drive up to eight white LEDs in series from a 3V source.
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Catalyst Semiconductor has expanded its family of solid state illumination products with the CAT4137 and CAT4237. Optimised for mobile LED lighting and backlight applications, the CAT4x37 family operate down below 2.5V and drive up to eight white LEDs in series from a 3V source. Power efficiency as high as 87% and a 'zero' shutdown current feature extend battery life in both operation and sleep modes.
A novel overvoltage circuit protects against open LED faults, reducing pin count and eliminating the need for large, costly external Zener diodes.
Further savings in board layout area result from the CAT4x37's high frequency switching operation.
For applications requiring greater luminous intensity, the CAT4237 is designed to drive up to 40mA.
This allows system designers to use higher power LEDs or a larger number of standard LEDs.
Backlight integrity is maintained with current regulation typically better than 0.1% across supply and 1.0% across temperature.
'Backlight module designers are challenged with sourcing the changing requirements of their end customers'.
'The flexibility and performance of the CAT4x37 family eliminates the headache and cycle time of qualifying new LED drivers for each new backlight design', comments Jamie White, Mixed Signal Marketing Manager.
The CAT4237 and CAT4137 are available in a 5-pin ThinSOT package; pricing in 1000 piece quantities is $0.85 and $0.80, respectively.
The CAT4237 and CAT4137 are available in RoHS compliant, environment friendly 'green' packages that are halogen and lead free.
Samples, evaluation kits and production quantities are available at the time of this publication.
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