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LT1932 - Constant-Current DC/DC LED Driver

Features

  • s Up to 80% Efficiency s Inherently Matched LED Current s Adjustable Control of LED Current s Drives Five White LEDs from 2V s Drives Six White LEDs from 2.7V s Drives Eight White LEDs from 3V s Disconnects LEDs In Shutdown s 1.2MHz Fixed Frequency Switching s Uses Tiny Ceramic Capacitors s Uses Tiny 1mm-Tall Inductors s Regulates Current Even When VIN > VOUT s Operates with VIN as Low as 1V s Low Profile (1mm) ThinSOTTM Package U.

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Full PDF Text Transcription

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FEATURES s Up to 80% Efficiency s Inherently Matched LED Current s Adjustable Control of LED Current s Drives Five White LEDs from 2V s Drives Six White LEDs from 2.7V s Drives Eight White LEDs from 3V s Disconnects LEDs In Shutdown s 1.2MHz Fixed Frequency Switching s Uses Tiny Ceramic Capacitors s Uses Tiny 1mm-Tall Inductors s Regulates Current Even When VIN > VOUT s Operates with VIN as Low as 1V s Low Profile (1mm) ThinSOTTM Package U APPLICATIO S s Cellular Telephones s Handheld Computers s Digital Cameras s Portable MP3 Players s Pagers TYPICAL APPLICATIO Li-Ion Driver for Four White LEDs VIN 2.7V TO 4.2V L1 6.8µH D1 C1 4.7µF PWM DIMMING CONTROL 61 VIN SW LT1932 5 SHDN 3 LED RSET GND 4 RSET 1.
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