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ADP1655:  Dual LED Flash Driver with I2C Compatible Interface

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
  • 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

    ADP1655 Functional Block Diagram

    Documentation

    Title Content Type File Type
    ADP1655: Dual LED Flash Driver with I2C-Compatible Interface Data Sheet (Rev 0, 06/2009) (pdf, 658 kB) Data Sheets PDF
    Isolating Power in Communication Bus and Gate Drive Applications
    Starting with a communications application overview of small power options through the process of selecting the right power products this webcast is a great resource for your communications applications designs.
    Webcasts WEBCAST
    Innovative Power Reduction Techniques Enable Handset Manufacturers to Provide Media Rich Devices
    The demand for mobile devices with high-end features has been rapidly increasing. Features like text messaging, gaming, GPS navigation, web browsing and video playback on high resolution color displays are becoming the norm in today’s portable consumer electronics market.
    (LED Journal, August/September 2009)
    Technical Articles HTML
    RAQs index Rarely Asked Questions HTML
    Glossary of EE Terms Glossary HTML

    Evaluation Kits & Symbols & Footprints

    Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

    Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

    SampleSample & Buy

    Price, packaging, availability

    ADP1655 Model Options
    Model Package Pins Temp.
    Range
    Packing,
    Qty
    Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    ADP1655ACBZ-R7 Status: Production CHIPS W/SOLDER BUMPS/WLCSP 12 Ind Reel, 3000 - $0.95 Y  Material Info PCN Purchase Sample
    Price Table Help

    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.

    ADP1655 Evaluation Board
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    ADP1655-EVALZ Status: Production Evaluation Board $100.00 Yes -

    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.

    Check Inventory & Purchase

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