CAT3637 Description
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. Low noise input ripple is achieved by operating at a constant switching frequency which allows the use of small external...
CAT3637 Key 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
- Soft Start and Current Limiting
- Short Circuit Protection
- Thermal Shutdown Protection