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AW3641EDNR

Flash Current & Flash Timer Programmable 1A Flash LED Driver

The AW3641E is a current-regulated charge pump ideal for powering high brightness LEDs for camera flash applications. The charge pump can be set to regulate two current levels for FLASH and TORCH modes. The AW3641E incorporates a 1-wire interface to program the flash LED current at 8 levels and flash timeout at 2 levels. The AW3641E supports PWM dimming to adjust the LED brightness during torch application by simply providing a PWM signal to FLASH pin. The AW3641E features an ultra low RDSON, and automatically switches modes between 1X and 2X, not only ensuring that LED current does not depend on the forward voltage, but also optimizing the efficiency at the whole power supply and load range. The AW3641E also features an automatic soft-start mode to limit inrush current, as well as over-temperature, over-voltage and short-circuit protection.

产品特性

l  Flash LED Current up to 1A Among Full Power Supply Range

l  8 Flash LED Current Levels Selectable by 1-wire Interface: 100%*IFLASH, 90%*IFLASH……30%*IFLASH

l  2 Flash Timeout Levels Selectable by wire Interface: 220ms, 1.3s

l  Ultra low RDSON: 0.4Ω(1X Mode), 2Ω(2X Mode)

l  PWM Dimming Control in Torch Mode

l  Automatic 1X/2X Mode Switchover

l  Up to 92% Efficiency in Torch Mode

l  Low 47mV Reference for Low Loss Sensing

l  Built-In Soft Start Limits Inrush Current

l  Over-Temperature Protection

l  Over-Voltage and Short-Circuit Protection

l  Low Ripple and EMI

l  Available in 3mm*3mm-10L DFN Package


Datasheet

Application note

产品型号 文档格式 大小 下载
AW3641EDNR PDF 2.2M
  • LED Channel
    Control Interface
    Flash Current (Max) (A)
    Torch Current (Max) (A)
    Flash Current Accuracy (%)
    Flash Timer (s)
    Indicator mode
    Type
    Package (mm)
  • AW3641EDNR

    1
    1-Wire
    1.0
    0.35
    ±8
    0.22/1.3
    -
    Charge Pump
    WBDFN 3X3-10L
封装形式 引脚数 长(mm) 宽(mm) 厚(mm) 引脚间距(mm) 散热盘 文档下载
DFN 3.0×3.0×0.75 -10L 10 3.0 3.0 0.75 0.5 Y
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