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ADP1660:  Dual 750 mA LED Flash Driver with I2C-Compatible Interface

Product Details

Product Status:Recommended for New Designs

ADP1660 is a very compact, highly efficient, dual white LED flash driver for high-resolution camera phones that improves picture and video quality in low light environments. The device integrates a programmable 1.5 MHz or 3.0 MHz synchronous inductive boost converter, an I2C-compatible interface, and two 750 mA current sources. The high switching frequency enables the use of a tiny, 1 mm high, low cost, 1 μH power inductor, and the parallel current sources permit LED cathode grounding for thermally enhanced, low EMI, and compact layouts.

The LED driver maximizes efficiency over the entire battery voltage range to maximize the input-power-to-LED-power conversion and minimize battery current draw during flash events. A programmable DC battery current limit safely maximizes LED current for all LED VF and battery voltage conditions.

A TxMASK input permits the flash LED currents and battery current to reduce quickly during a power amplifier current burst. The I2C-compatible interface enables the programmability of timers, currents, and status bit readback for operation monitoring and safety control.

ADP1660 comes in a compact 12-ball, 0.5 mm pitch package and operates within specification 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
    -- Small, 2 mm × 1.5 mm, 12-ball WLCSP package
    -- Smallest footprint, 1 mm height, 1 μH power inductor
    -- See data sheet for additional features
  • High efficiency: 90% peak
    -- Reduces high levels of input battery current during flash
    -- Limits battery current drain in torch mode
  • I2C programmable
    -- Currents up to 750 mA in flash mode per LED with 7% accuracy flash conditions
    -- Torch mode
    -- Programmable DC battery current limit (4 settings)
    -- See data sheet for additional features
  • Control
    -- I2C-compatible control registers
    -- External STROBE and torch input pins
    -- Transmitter mask (TxMASK) input
  • Safety
    -- Thermal overload protection
    -- Inductor fault detection
    -- LED short-/open-circuit protection

Functional Block Diagram for ADP1660

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Price, packaging, availability

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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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