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HX8002,1A同步升降压LED驱动

HX8002】1A同步升降压LED驱动

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HX8002 详细介绍

HX8002 Features
• High Efficiency: >90% Typical in Torch Mode, >80% in Flash Mode
• Wide VIN Range: 2.7V to 5.5V
• Up to 1A Continuous Output Current
• 3.5% LED Current Programming Accuracy
• Internal Soft-Start
• Open/Shorted LED Protection
• Constant Frequency 1MHz Operation
• Zero Shutdown Current
• Overtemperature Protection
• Small Thermally Enhanced 10-Lead (3mm × 3mm) DFN Package
 
 
HX8002 Description
The HX8002 is a synchronous buck-boost DC/DC converter optimized for driving a single high power LED at currents up to 1A from a single cell Li-Ion battery input. The regulator operates in either synchronous buck, synchronous boost, or buck-boost mode depending on input voltage and LED forward voltage. PLED/PIN efficiency greater than 90% can be achieved over the entire usable range of a Li-Ion battery (2.7V to 4.2V).
LED current is programmable to one of four levels, including shutdown, with dual external resistors and dual enable inputs. In shutdown no supply current is drawn. A high constant operating frequency of 1MHz allows the use of small external components.
The HX8002 is offered in a low profile (0.75mm) thermally enhanced 10-lead (3mm × 3mm) DFN package.
 
 
HX8002 Applications
• Cell Phone Camera Flash
• Cell Phone Torch Lighting
• Digital Cameras
• PDAs

• Misc Li-Ion LED Drivers