On Semiconductor NCP5623: Triple-output LED driver targets RGB lighting and LCD backlighting in portable devices
Driving tricolor RGB LEDs for enhanced LCD backlighting, the NCP5623 triple-output LED driver has an I2C interface and built-in gradual dimming. The device suits portable-system applications, including cell phones and MP3 players. With a ±0.5% typical matching tolerance and 32 current levels, the unit’s three independently controlled outputs allow 32,000 colors with a tricolor RGB LED. The device includes an integrated gradual-dimming function that progressively increases or decreases output current, producing a theatrical fade-in/fade-out effect. The driver has 94% peak efficiency with less-than-1-μA standby current over a lithium-based-battery operating range. Available in a 2×2×0.55-mm LLGA-12 package, the NCP5623 costs 55 cents (3000).
On Semiconductor, www.onsemi.com
