FEATURES
High efficiency 1.33x charge pump Quad-mode charge pump: 1x, 1.33x, 1.5x, 2x Drives up to 3 LEDs at 30mA each 1-wire EZDim™ 32 linear steps 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 RoHS-compliant 16-pad TQFN package LCD Display Backlight Cellular Phones Digital Still Cameras Handheld Devices 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 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. Marking JAAP Catalyst Semiconductor’s Quad-Mode™ 1.33x, charge pump switching architecture is patented.
Catalyst Semiconductor
