GENERAL DESCRIPTION
Optimized operation frequency can meet the requirement of small LC filters value and low operation current with high efficiency. Internal soft start function can reduce the inrush current. Tiny package type provide the best solution for PCB space saving and total BOM cost. The HM9284 is a step-up converter designed for driving up to 7 series white LEDs from a single cell Lithium lon battery . The HM9284 uses current mode， fixed frequency architecture to regulate an LED current. which is measured through an external current sense resistor. The HM9284 includes unde voltage lockout， current limiting and thermal overload protection preventing damage in the event of an output overload.

FEATURES
● High Efficiency: Up to 90%
● 1.2MHz Constant Frequency Operation
● Integrated internal Power MOSFET
● Drives up to 7 Series WLEDs
● Soft-start/Dimming with wide Frequency Range
● UVLO, Thermal Shutdown
● Internal Current limit
● Over Voltage Protection
● Small LC Filter
● Minimize the External Component
● <1µA Shutdown Current
● SOT23-6 Package

APPLICATIONS
● Camera Flash White LED
● Mobile Phone, Smart Phone LED Backlight
● PDA LED Backlight
● Digital Still Cameras
● Camcorder