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ADP1655:  Dual LED Flash Driver with I2C Compatible Interface

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 ...More

ADP1655:  Dual LED Flash Driver with I2C Compatible Interface

Product Description

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

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    EVALUATION BOARDS & DEVELOPMENT KITS

    • 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
    • Input Voltage Range (Vcc): 2.75 to 5.5 V
    • Package: 12-WLCSP

    ADP1655 Functional Block Diagram

    Similar Products

    arrow View Full Interactive Product Selection Table
    Part# Input Voltage Range (Vcc) Vout Adjust Options Iout (max) (mA) Switching Frequency (MHz) Package Price* (1000-4999)
    ADM8843 2.6 to 5.5V - 20 1.5 16-LFCSP $0.50
    ADM8845 2.6 to 5.5V - 30 - 16-LFCSP $0.71
    ADP1610 2.5 to 5.5 V Vin to 12 V 1.2 1.2 8-MSOP $1.12
    ADP1611 2.5 to 5.5 V Vin to 20 V 1.2 1.2 8-MSOP -
    ADP1653 2.75 to 5.5 V - 500 1.2 16-LFCSP $1.45
    ADP1655 2.75 to 5.5 V - 500 2 12-WLCSP $0.95
    ADP5520 2.27 to 5.5 V - 30 1 - $1.66
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    * The pricing listed here is provided only for budgetary purposes as recommended list price in U.S. Dollars in the United States ex factor per unit for the stated volume. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
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    Pricing, Packaging & Availability

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    Temperature Range
    This is the acceptable operating range of the device. The various ranges specified are as follows:
    • Commercial: 0 to +70 degrees Celsius
    • Military : -55 to +125 degrees Celsius
    • Industrial: Temperature ranges may vary by model. Please consult the datasheet for more information.
    • Automotive: -40 to +125 degrees Celsius
    Price
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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.
    **Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.