A8434

www.DataSheet4U.com A8434 6-Channel High Efficiency Charge Pump White LED Driver Features and Benefits ▪ Proprietary adaptive control scheme (1×, 1.5×, 2×) ▪ 0.5% typical WLED current matching ▪ Drives up to 6 white LEDs ▫ Main display backlight (up to 6 WLEDs) ▫ Main display and sub display backlight ▫ Main display and low-current flash/torch ▪ 30 mA per WLED ▪ 2× serial dimming interfaces ▪ 320 mA charge pump capability ▪ Low EMI design and soft start function ▪ Short circuit, overvoltage, thermal shutdown protection ▪ 0.75 mm nominal height (very thin profile), 3 × 3 mm footprint packages Description The A8434 high efficiency charge pump ICs offer a simple, low-cost WLED (white LED) driver solution for driving up to six WLEDs in various application configurations, either all six backlighting a single display, or for multiple displays, such as four WLEDs as the main display backlight, with the other two WLEDs used for backlighting a sub display or a low-current flash/torch. Using a proprietary control scheme (1×, 1.5×, and 2×), the A8434 can deliver well-matched WLED current while maintaining the highest efficiency and low EMI. The WLED current is regulated over the entire range of Li+ battery voltage to provide uniform intensity. WLED brightness and on/off can be controlled for the main display and sub display/torch through 2 single-wire serial interface pins. The A8434 is available in an QFN/MLP-16 space-conserving (3 × 3 mm footprint) ES package. Applications include: ...