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Application Notes

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  LTC3207/LTC3207-1 Users Guide &mdash AN108
  PDF, 88 Кб, Файл опубликован: 6 июл 2007
  The LTC3207/LTC3207-1 is a 600mA LED/Camera driver which illuminates 12 Universal LEDs (ULEDs) and one camera flash LED. The (ULEDs) are considered universal because they may be individually turned on or off, set in general purpose output (GPO) mode, set to blink at a selected on-time and period, or gradate on and off at a selected gradation rate. This device also has an external enable (ENU) pin that may be used to blink, gradate, or turn on/off the LEDs without using the I2C bus. This may be useful if the microprocessor is in sleep or standby mode. If used properly, these features may save valuable memory space, programming time, and reduce the I2C traffic.
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  Application Note 108
  July 2007
  LTC3207/LTC3207-1 User’s Guide
  by Marty Merchant
  INTRODUCTION
  The LTCВ®3207/LTC3207-1 is a 600mA LED/Camera driver
  which illuminates 12 Universal LEDs (ULEDs) and one
  camera flash LED. The ULEDs are considered universal
  because they may be individually turned on or off, set
  in general purpose output (GPO) mode, set to blink at a
  selected on-time and period, or gradate on and off at a
  selected gradation rate. This device also has an external
  enable (ENU) pin that may be used to blink, gradate, or
  turn on/off the LEDs without using the I2C bus. This may be
  useful if the microprocessor is in sleep or standby mode. If
  used properly, these features may save valuable memory
  space, programming time, and reduce the I2C traffic.
  I2C Control
  The LTC3207/LTC3207-1 has 16 data registers, each
  with its own sub-address as shown in Table 2. The data
  is loaded into the registers when the device receives a
  Stop bit. This device is written using the standard I2C
  protocol. A 7-bit slave address and write bit is followed …

Статьи

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  Universal 12-Output LED Driver Controls 4-RGB LEDs &mdash LT Journal
  PDF, 99 Кб, Файл опубликован: 14 июн 2007
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  DESIGN IDEAS L Universal 12-Output LED Driver
  By Ted Henderson
  Controls 4-RGB LEDs
  Introduction
  RGB LEDs produce a wide range
  of colors, including white, making
  them highly versatile. Each RGB LED
  requires three drivers, one for each
  color LED. Using a multiple output
  LED driver for RGB applications can
  save solution size and cost versus
  single LED drivers. The LTC3207 and
  LTC3207-1 each provide 12 individually programmable current sources
  (universal drivers). This allows them
  to drive up to 12 white LEDs or four
  RGB LEDs, as shown in FigureВ 1. Each
  universal LED driver is controlled
  by a dedicated 6-bit linear DAC that
  covers an LED output current range
  of 400ВµA to 28mA. Any unused universal or camera outputs can simply
  be connected to ground and left unprogrammed by the I2C port.
  The LTC3207 and LTC3207-1 include all of the functions required to
  drive 12 LEDs and one camera LED, …

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Классификация производителя

• Power Management > Inductorless (Charge Pump) DC/DC Converters > Inductorless (Charge Pump) LED Drivers

Варианты написания:

LTC3207EUFPBF, LTC3207EUF PBF