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LTC3220
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LTC3220

  • Category:LED driver
  • Product Name:LTC3220/LTC3220-1 - 360mA general purpose 18-channel LED drivers
  • Manufacturers:LT
  • Production Batch Number:11+
  • Encapsulation:QFN
  • Stock Status:There is stock
  • Stock Quantity:20000
  • Minimum order quantity: 1
  • Details:Click here to find PDF information on the LTC3220
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  • Product introduction

LTC3220

LTC3220/LTC3220-1 - 360mA general purpose 18 channel LEDsdrive

peculiarity

  • Eighteen 20mA general-purpose current sources with 64 steps of linear brightness control
  • Two-wire typeI2CInterface for independent turn-on/off, brightness level, flicker, and grayscale control for each current source
  • Low noise multimode charge pumps (1x, 1.5x, 2x) provide up to 91% efficiency
  • Slew rate-limited switching reduces conducted and radiated noise (EMI)
  • Up to 360mA total output current
  • Internal current reference
  • A single reset pin is used for asynchronous shutdown and reset of all data registers
  • Two are providedI2CAddress (LTC3220:0011100, LTC3220-1:0011101)
  • Automatic or forced mode switching
  • An internal soft-start feature limits inrush current
  • Short circuit/thermal protection
  • 4mm x 4mm slim (only 0.55mm height) 28-pin QFN package

  • description

    LTC®The 3220/LTC3220-1 are highly integrated multidisplay LED drivers. These devices include a high efficiency, low noise charge pump to power up to 18 general-purpose LED current sources. The LTC3220/LTC3220-1 require only five small ceramic capacitors to form a complete LED supply and current controller.

    The LED current is set by an internal precision current reference. Independent dimming, on/off, flickering, and grayscale control of all general-purpose current sources pass I2C serial interface to implement. A 6-bit linear DAC can be used to independently adjust the brightness level of each general-purpose LED current source.

    The LTC3220/LTC3220-1 charge pumps optimize efficiency based on the voltage across the LED current source. These devices power up in 1x mode and automatically switch to boost mode when any enabled LED current source begins to enter a dropout state. The first voltage drop will convert the devices to 1.5x mode, and subsequent drops will switch the LTC3220/LTC3220-1 to 2x mode. When a bit of data passes through I2When the C port is updated, these devices are reset to 1x mode.

  • apply

    • Videophone with QVGA+ display
    • Keyboard lighting
    • General/all types of lighting

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