onsemi CAT3648
The CAT3648 is a high efficiency 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. The multi−fractional charge pump supports a wide range of input voltages from 2.5 V to 5.5 V.| Part No. | CAT3648 |
|---|---|
| Datasheet | CAT3648 Download |
| Manufacturer |  onsemi |
| Description | 4-Channel Ultra High Efficiency LED Driver |
| Buy | Stock & Price |
DESCRIPTION
Low noise input ripple is achieved by operating at a constant switching frequency which allows the use of small external ceramic capacitors. 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 1.33x, charge pump switching
