Fabricante
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Advanced Analogic Technologies
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General Description
The AAT3194 is a low noise, constant frequency charge pump DC/DC converters that use fractional (1.5X) conversion to increase efficiency in white LED applications. The devices can be used to produce current levels up to 20mA for each output from a 2.7V to 5.5V input. A low external parts count (two 1µF flying capacitors and two small bypass capacitors at IN and OUT) makes these devices ideally suited for small, battery-powered applications.
FEATUREs
• VIN Range: 2.7V to 5.5V
• 20mA Full-Scale Current
• Simple Serial Control (S2Cwire) Interface
— 32-Position Logarithmic Scale with Digital Control
• Low Noise Constant Frequency Operation
• 33% Less Input Current Than Doubler Charge Pump
• High Accuracy Brightness Matching
• Small Application Circuit
• Regulated Output Current
• Automatic Soft Start
• No Inductors
• 600kHz Switching Frequency
• IQ <1µA in Shutdown
• Temperature Range: -40°C to 85°C
• 12-Pin TSOPJW Package
APPLICATIONs
• Programmable Current Source
• White LED Backlighting
Número de pieza
componentes Descripción
PDF
Fabricante
High Efficiency 1.5X Fractional Charge Pump for White LED Applications
Analog Technology Inc
High Efficiency 1.5X Fractional Charge Pump for White LED Applications ( Rev : 2004 )
Analog Technology Inc
High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications ( Rev : 2003 )
Advanced Analogic Technologies
High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications
Advanced Analogic Technologies
High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications
Advanced Analog Technology, Inc.
High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications
Analog Technology Inc
High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications ( Rev : 2005 )
Advanced Analogic Technologies
High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications ( Rev : 2005 )
Advanced Analogic Technologies
High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications ( Rev : 2005 )
Advanced Analogic Technologies
High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications
Advanced Analogic Technologies