G5921 Datasheet | Global Mixed-mode Technology

Global Mixed-mode Technology Inc. G5920/G5921 Ultra Low-Dropout, Constant-Current White LED Bias Features - Ultra Low 150m V Dropout at 20m A - 0.6% High Accuracy Current Matching - 20m A Full Scale Current - 32 Level Linear Current Brightness Control - PWM Brightness Control - 2.5V to 5.5V Supply Voltage Range - SOT-23-6 Package (G5920) - MSOP-8 Package (G5921) Applications - Mobile Phones - White LED backlighting General Description The G5920/G5921 is a high performance ultra lowdropout constant current bias supply for white LEDs. It can be used as an alternative to the simple ballast resistors in conventional parallel white LEDs applications. Each white LED bias current is matching to 0.6%. For dimming control, an enable input pin is controlled by processor GPIO output pulses for 32 level linear current. Using a low frequency PWM waveform to this enable input pin also controls the average LED current which is proportional to the PWM duty. The G5920/G5921 is suitable for single cell Li-ion battery power device that using low forward voltage white LEDs. The white LEDs can be powered directly from battery without extra external ponents. This takes an advantage of highest efficiency and creates no EMI problem. Ordering Information ORDER NUMBER G5920TB1U G5921P8U Note:TB : SOT23-6 P8: MSOP-8 U: Tape & Reel ORDER NUMBER (Pb free) G5920TB1Uf G5921P8Uf MARKING 5920x 5921x TEMP. RANGE -40°C to 85°C -40°C to 85°C PACKAGE SOT-23-6...