onsemi CAT3637
The CAT3637 is a high efficiency fractional charge pump that can drive up to six LEDs programmable by a 1−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. | CAT3637 |
|---|---|
| Datasheet | CAT3637 Download |
| Manufacturer |  onsemi |
| Description | 6-Channel Programmable High Efficiency Quad-Mode 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/SET logic input functions as a chip enable and a digital programming interface for setting the current in the LED channels. The 1−wire pulse−programming interface supports 15 linear steps from zero current to 30 mA full−brightness in 2 mA steps. The device is available in a tiny 16−pad TQFN 3 x 3 mm package with a maximum height of 0.8 mm. ON Semiconductor’s 1.33x, charge pump switching architecture is patented.FEATURES
● High Efficiency 1.33x Charge Pump● Charge Pump: 1x, 1.33x, 1.5x, 2x
● Drives 6 LEDs Between 30 mA and 0 mA Each
● 1−wire EZDimt Interface with 2 mA Step
● Power Efficiency up to 92%
● Low Noise Input Ripple in All Modes
● “Zero” Current Shutdown Mode
● Soft Start and Current Limiting
● Short Circuit Protection
● Thermal Shutdown Protection
● Tiny 3 mm x 3 mm, 16−pad TQFN Package
● These Devices are Pb−Free, H...
