Allegro MicroSystems A8434
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. The WLED current is regulated over the entire range of Li+ battery voltage to provide uniform intensity. The A8434 is available in an QFN/MLP-16 space-conserving (3 × 3 mm footprint) ES package.| Part No. | A8434 |
|---|---|
| Datasheet | A8434 Download |
| Manufacturer |  Allegro MicroSystems |
| Description | 6-Channel High Efficiency Charge Pump White LED Driver |
| Buy | Stock & Price |
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
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. WLED brightness and on/off can be controlled for the main display and sub display/torch through 2 single-wire serial interface pins.APPLICATIONS
include:●
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● White LED backlights for cellular phones, PDAs Digital cameras, camcorders Portable audio devices and MP3s Other portable device white LED backlightin...
