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AL3644 - DUAL 1.5A CURRENT SOURCE CAMERA FLASH LED DRIVER

General Description

The AL3644 is a dual LED flash driver that provides a high level of adjustability within a small solution size.

The AL3644 utilizes a 2MHz or 4MHz fixed frequency synchronous boost converter to provide power to the dual 1.5A constant current LED sources.

Key Features

  • of the AL3644 are controlled via an I2C-compatible interface. These features include: hardware flash and hardware torch pins (STROBE and TORCH/TEMP), a TX interrupt, and an NTC thermistor monitor. The device offers independently programmable currents in each output leg to drive the LEDs in a Flash or Movie Mode (Torch) condition. Pin Assignment A1 A2 A3 B1 B2 B3 C1 C2 C3 D1 D2 D3 Top View The 2MHz or 4MHz switching frequency options, overvoltage protection (OVP), and adjustable cu.

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AL3644 DUAL 1.5A CURRENT SOURCE CAMERA FLASH LED DRIVER Description The AL3644 is a dual LED flash driver that provides a high level of adjustability within a small solution size. The AL3644 utilizes a 2MHz or 4MHz fixed frequency synchronous boost converter to provide power to the dual 1.5A constant current LED sources. The dual 128 level current sources provide the flexibility to adjust the current ratios between LED1 and LED2. An adaptive regulation method ensures the current sources remain in regulation and maximizes efficiency. Features of the AL3644 are controlled via an I2C-compatible interface. These features include: hardware flash and hardware torch pins (STROBE and TORCH/TEMP), a TX interrupt, and an NTC thermistor monitor.