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LDS8868 Datasheet(PDF) 1 Page - IXYS Corporation |
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LDS8868 Datasheet(HTML) 1 Page - IXYS Corporation |
1 / 14 page ![]() LDS8868 © 2009 IXYS Corp. 1 Doc. No. 8868_DS, Rev. N2.1 Characteristics subject to change without notice 6-Channel Ultra Low Dropout LED Driver FEATURES o Charge pump modes: 1x, 1.5x, 2x o Ultra low dropout PowerLite ™ Current Regulator* o Drives up to 6 LEDs at 32mA each o 1-wire LED current programming o Power efficiency up to 94% o Low input noise & ripple in all charge pump modes o Low current shutdown mode o Short circuit current limiting o Thermal shutdown protection o Available in 3 x 3 x 0.8 mm 16-pin TQFN package APPLICATION o Keypad and Display Backlight o Cellular Phones o Digital Still Cameras o PDAs and Smartphones DESCRIPTION The LDS8868 is a high efficiency multi-mode fractional charge pump with ultra low dropout voltage that can drive up to six LEDs. Inclusion of an ultra low dropout PowerLite ™ Current Regulator (PCR) increases device’s efficiency up to 94%. The EN/SET logic input functions as a chip enable and a current setting interface. The LEDs current is programmable by one wire digital interface from 0.5 to 32mA in 0.5mA steps or from zero to 3.75mA in 0.25mA steps. Every LED bank with two LEDs each may be turned on/off or programmed separately 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 2.7V to 5.5V. The device is available in in 16-lead TQFN 3 mm x 3 mm package with a max height of 0.8 mm. TYPICAL APPLICATION CIRCUIT |
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