CAT3648 Series 25 mA 5.5 V 1.3 MHz SMT Quad Mode 4-Channel LED Driver - TQFN-16
Mfr Part#: CAT3648HV3-GT2 Mounting Method: Surface Mount Package Style: TQFN-16 Packaging: Cut Tape Std Packaging Qty: 2,000
The CAT3648 is a 4-Channel Ultra High Efficiency Quad-Mode LED Driver with 32 Dimming Levels.
The CAT3648 is a high efficiency quad−mode fractional charge pump that can drive up to four 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 2.5 V to 5.5 V. The EN/DIM logic input functions as a chip enable and a digital dimming interface for setting the current in all LED channels. The 1−wire pulse−dimming interface supports 32 linear steps from full−scale down to zero current. The device is available in the tiny 16−pad TQFN 3 mm x 3 mm package with a max height of 0.8 mm. ON Semiconductor’s Quad−Mode® 1.33x, charge pump switching architecture is patented.
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