onsemi CAT3614
The CAT3614 is a high efficiency 1x/1.5x fractional charge pump with programmable dimming current in four LED channels. 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 EZDimt interface for dimming control of the LEDs.| Part No. | CAT3614 |
|---|---|
| Datasheet | CAT3614 Download |
| Manufacturer |  onsemi |
| Description | 4-Channel 1-Wire LED Driver |
| Buy | Stock & Price |
DESCRIPTION
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 1 MHz which allows the use of small external ceramic capacitors. When enabled, a series of clock pulses reduces the LED brightness in 1 mA steps on each negative going edge. Currents from 0 mA to 31 mA are supported. The device is available in the tiny 12−pad TDFN 3 x 3 mm package with a max height of 0.8 mm.FEATURES
● Drives up to 4 LED Channels● 1−wire EZDimt Programmable LED Current
● Accurate 1 mA Dimming Level
● Power Efficiency up to 91%
● Fractional Pump 1x/1.5x
● Low Noise Input Ripple
● Fixed High Frequency Operation 1 MHz
● “Zero” Current Shutdown Mode
● Soft Start and Current Limiting
● Short Circuit Protection
● Thermal Shutdown Protection
● TDFN 12−pad 3 mm x 3 mm Package
● These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant
APPLICATIONS
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