Overview

Features and Benefits

  • Ultracompact solution
    Please see data sheet for deatails
  • High efficiency: 88% peak
    Reduces high levels of input battery current during flash
    Limits battery current drain in torch mode
  • I2C programmable
    Please see data sheet for deatails
  • Control
    I2C-compatible control registers, External STROBE pin
    External direct TORCH pin, TX_MASK input to prevent high input battery current levels
  • Safety
    Thermal overload protection, Flash timeout, Inductor fault detection
    Output overvoltage, Short circuit protection, Soft start reduces inrush input current

Product Details

The ADP1655 is a very compact, highly efficient, dual white LED flash driver for high resolution camera phones, which improves picture and video quality in low light environments. The device integrates a 2 MHz synchronous inductive boost convertor, an I2C-compatible interface and a 500 mA current source. The high switching frequency enables the use of a tiny, low profile 2.2 μH power inductor, and the current source permits LED cathode grounding for thermally enhanced, low EMI and compact layouts.

The efficiency is high over the entire battery voltage range to maximize the input power to LED power conversion and minimize battery current draw during flash events. In addition, a Tx-mask input permits the flash LED current to reduce quickly and, therefore, the battery current reduces quickly, during a GSM power amplifier current burst.

The I2C-compatible interface enables the programmability of timers, currents, and status bit readback for operation monitoring and safety control.

The ADP1655 comes in a compact 12-ball 0.5 mm pitch WLCSP package and is specified over the full −40°C to +125°C junction temperature range.

Applications

  • Camera-enabled cellular phones and smart phones
  • Digital still cameras, camcorders, and PDAs
  • Power by Linear

    Product Categories

    Product Lifecycle icon-not-recommended Not Recommended for New Designs

    This designates products ADI does not recommend broadly for new designs.

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    ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

    PCN-PDN Information

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    The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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    Evaluation Boards Pricing displayed is based on 1-piece.
    Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.