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A8434 Datasheet 6-Channel High Efficiency Charge Pump White LED Driver

Manufacturer: Allegro MicroSystems

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General 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.

Overview

www.DataSheet4U.com A8434 6-Channel High Efficiency Charge Pump White LED.

Key Features

  • 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 profil.

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