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电源芯片

MT9284 1.2MHz, High Efficiency Boost White LED Driver

GENERAL DESCRIPTION
The MT9284 is a step-up converter designed for
driving up to 7 series white LEDs from a single
cell Lithium Ion battery. The MT9284 uses
current mode, fixed frequency architecture to
regulate an LED current, which is measured
through an external current sense resistor.
The MT9284 includes under-voltage lockout,
current limiting and thermal overload protection
preventing damage in the event of an output
overload.
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.

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