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2014-08-04T17:19:32-07:00
BroadVision, Inc.
2020-12-09T14:28:36+08:00
2020-12-09T14:28:36+08:00
Acrobat Distiller 10.0.0 (Windows)
application/pdf
CAT3643 - 3-Channel Ultra High Efficiency LED Driver
ON Semiconductor
The CAT3643 is a high efficiency fractional charge pump that can
drive up to three LEDs programmable by a one wire digital interface.
The inclusion of a 1.33x fractional charge pump mode increases
device efficiency by up to 10% over traditional 1.5x charge pumps
with no added external capacitors.
Low noise input ripple is achieved by operating at a constant
switching frequency which allows the use of small external ceramic
capacitors. The multi−fractional charge pump supports a wide range of
input voltages from 2.4 V to 5.5 V.
The EN/DIM logic input functions as a chip enable and a digital
dimming interface for current setting of all LEDs. Six different current
ratios are available via the interface.
The device is available in the 16−pad TQFN or 12−pad TDFN 3 mm
x 3 mm package with a max height of 0.8 mm.
ON Semiconductor’s 1.33x charge pump switching architecture is
patented.
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