SC4539: High Efficiency Boost Converter for up to 6 LEDS
The SC4539 is designed to regulate current for a series chain of white LEDs in LCD backlighting applications where small size and high efficiency are priorities.
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- Input voltage range — 2.8V to 5.5V
- Current-mode PWM control — 800kHz
- Programmable LED current up to 30mA
- Soft-start to reduce in-rush current
- PWM dimming — 100Hz to 50kHz
- PWM dimming at ISET — Analog and fi ltered
- Over-voltage protection — 25V (max.)
- Under-voltage lockout (UVLO)
- Thermal shutdown
- Shutdown current — <1μA
- Ultra-thin package — 2mm x 2mm x 0.6mm
- Lead-free package, WEEE and RoHS compliant
- DSLR, DSC, and Video Cameras
- Cellular handsets
- Portable media players
- Personal navigation systems
- Satellite radio
- Handheld video games
- SC4539ULTRT: Lead-free, RoHS and WEEE compliant, 3000 pcs. Tape & Reel
