SC441: High Efficiency Integrated Driver For 4-Strings Of 150mA LEDs | Semtech

The SC441 is a high-eiciency multiple string WLED driver with an integrated boost converter. It operates over a wide input range from 4.5V to 21V with a maximum out- put voltage of 36V and a 2.5A internal power Switch It CAN drive up to forty WLEDs in 4 strings with current up to 150mA per string. The string-to-string current match- ing is 2% typical, 3% maximum. The overall ei ciency is greater than 90% due to the low Current Sense voltage and a low-impedance internal power Switch The wide PWM dimming range boasts a ratio of 500: 1. The SC441 also features comprehensive open and short- circuit LED protection functions. It disables the corre- sponding strings with LED open or LED short conditions while maintaining normal operation of other, unaf ected LED strings. This feature allows LCD panels to remain view- able even under LED failure, wire disconnect, or short-cir- cuit conditions. The internal thermal shutdown protects the IC from overheating at abnormal conditions. By Semtech Corporation
SC441 's PackagesSC441 's pdf datasheet

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SC441 Application circuits
SC441 circuits
This is one application circuit of SC441,If you need more circuits,please download SC441's pdf datasheet.

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