onsemi CAT3647HV3-GT2

Lead Free RoHS Compliant QUAD SERIAL IC LED Driver -40C~85C TA 1MHz~1.3MHz 5.5V 2.4mA

LED Display Driver IC; Device Type:LED; Display Interface:7-segment numeric LED digits, bar graph, or discrete LEDs; Data Control Interface:Serial; Supply Voltage Min:2.5V; Supply Voltage Max:5.5V; Termination Type:SMD ;RoHS Compliant: Yes

The CAT3647 is a high efficiency quad-mode 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 2.4V to 5.5V. The EN/DIM logic input functions as a chip enable and a digital dimming interface for setting the current in all the 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 3mm x 3mm package with a max height of 0.8mm. ON Semiconductors Quad-Mode 1.33x charge pump switching architecture is patented.