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ADP1653:  Compact, High Efficiency, High Power, Flash/Torch LED Driver with Dual Interface

Product Details


The ADP1653 is a very compact, high efficiency, high power, camera flash LED driver optimized for cellular phones. The high efficiency and dynamic LED current control of the device improve flash brightness and picture quality in dimly lit environments. Efficiency peaks at 92% and is higher than charge pump solutions over the Li-Ion battery range.

The device has a dual-mode interface that is configurable to 2-bit logic or an I2C® interface. The indicator and high power LED currents are programmable with external resistors or through the I2C interface. To maximize overall flash brightness, the ADP1653 offers an input to reduce flash LED current in less than 50 μs, referred to as the Tx mask. Tx masking reduces battery stress by scaling back flash LED current during an RF transmission.

The ADP1653 solution requires only four external components in I2C mode and fits in a 6.4 mm × 7.2 mm space. The part integrates multiple safety features such as soft start, flash timeout, output current limit, thermal protection, and overvoltage protection.

The ADP1653 operates over the −40°C to +125°C junction temperature range.

Applications

  • Camera-enabled cellular phones, smart phones
  • Digital still cameras, camcorders, PDAs
  • Data Sheet, Rev. B, 9/07

    FEATURES and BENEFITS

    • Small 6.4 mm × 7.2 mm solution
    • 2.2 μH power inductor
    • 92% peak efficiency
    • Tx masking within 50 μs
    • 2.1 A, 12 V power switch
    • Pin-selectable interface: 2-bit logic or I2C
    • Programmable flash and torch current
      Up to 200 mA in torch mode
      Up to 500 mA in flash mode
    • Programmable indicator LED current up to 20 mA
    • Programmable timer register: up to 820 ms flash timeout
    • 2.75 V to 5.5 V input voltage range
    • Low noise, 1.2 MHz PWM operation
    • Safety features
      Interrupt output pin
      Fault condition register Short-circuit protection
      Output overvoltage protection
      Thermal overload protection
      Integrated current limit and soft start

    Typical Application Circuit/PCB Layout for ADP1653

    Documentation

    Title Content Type File Type
    ADG1653: Compact, High Efficiency, High Power, Flash/Torch LED Driver with Dual Interface Data Sheet (Rev B, 09/2007) (pdf, 972 kB) Data Sheets PDF
    AN-861: ADP1653 Evaluation and Test Methods  (pdf, 937 kB) Application Notes 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
    Led Driver (Photonics, 2/2007) Product Reviews HTML
    We measure portable performance in µA and MHz. In handheld designs, analog is everywhere. Overview HTML
    ICs for Enhanced Handset User Experience Overview HTML
    ADP1653 High Brightness Flash LED Driver with I2C® Interface  (pdf, 1629 kB) Overview PDF
    ADP1652 High Brightness Flash LED Driver with I2C Interface  (pdf, 745 kB)
    (February 2006)
    Overview PDF
    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

    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.

    ADP1653 Evaluation Board
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    ADP1653-EVALZ Status: Production Evaluation Board - Yes - Contact ADI

    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.

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