MT9284_数据手册_白光LED驱动芯片.pdf

AEROSEMI MT9284 1.2MHz, Fixed Frequency White LED Driver FFATURES GENERAL DESCRIPTION • High Efficiency: Up to 90% The MT9284 is a step-up converter designed for • 1.2MHz Constant Frequency Operation driving up to 7 series white LEDs from a single cell • Integrated internal Power MOSFET Lithium Ion battery. The MT9284 uses current mode, • Drives up to 7 Series WLEDs fixed frequency architecture to regulate an LED • Low 104mV Feedback Voltage current, which is measured through an external • Soft-start/Dimming with wide Frequency Range current sense resistor. Its low 104mV feedback • UVLO, Thermal Shutdown voltage reduces power loss and improves efficiency. L • Internal Current limit The MT9284 includes under-voltage lockout, current A limiting and thermal overload protection preventing • Over Voltage Protection I T • Small LC Filter damage in the event of an output overload. N • Minimize the External Component Optimized