Linear LED Drivers | CAT3614

LED Driver, Charge Pump, 4-Channel

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The CAT3614 is a high efficiency 1x/1.5x fractional charge pump with programmable dimming current in four LED channels. To ensure uniform brightness in LCD backlight applications, each LED channel delivers an accurate regulated current.

Low noise and input ripple is achieved by operating at a constant switching frequency of 1MHz which allows the use of small external ceramic capacitors. The 1x/1.5x fractional charge pump supports a wide range of input voltages from 3 V to 5.5 V with efficiency up to 91%, and is ideal for Li-Ion battery powered devices.

The EN/DIM logic input provides a 1-wire EZDim™ interface for dimming control of the LEDs. When enabled, a series of clock pulses reduces the LED brightness in 1mA steps on each negative going edge. Currents from 0 mA to 31 mA are supported.

  • LCD Display Backlight
  • Mobile Phones
  • Digital Still Cameras
  • Drives up to 4 LED channels
  • 1-wire EZDim™ Programmable LED Current
  • Accurate 1mA Dimming Level
  • Power efficiency up to 91%
  • Fractional pump 1x/1.5x
  • Low noise input ripple
  • Fixed High Frequency Operation 1MHz
  • “Zero” Current Shutdown Mode
  • Soft start and current limiting
  • Short circuit protection
  • Thermal shutdown protection

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CAT3614HV2-GT2

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Obsolete

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Pb

A

H

P

TDFN-12

511AN

1

260

REEL

2000

N

5.5

124

1

4

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