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AIC3643

Analog Integrations
Part Number AIC3643
Manufacturer Analog Integrations
Description Built-in OVP White LED Step-Up Converter
Published Apr 14, 2011
Detailed Description AIC3643 Built-in OVP White LED Step-Up Converter FEATURES Built-In Open Circuit Protection Over Voltage Protection Effic...
Datasheet PDF File AIC3643 PDF File

AIC3643
AIC3643

Overview
AIC3643 Built-in OVP White LED Step-Up Converter FEATURES Built-In Open Circuit Protection Over Voltage Protection Efficiency Up to 83% at VIN=4.
2V, 3LEDs, ILED=20mA 1.
2MHz Fixed Switching Frequency Drives Up to 5LEDs in series 2.
5V to 5.
5V Input Voltage Low Supply Current: 150μA Matches LED Current Requires Tiny Inductor and Capacitors TSOT-23-6, and SOT-23-6 Packages DESCRIPTION AIC3643 is a current-mode pulse-widthmodulation (PWM), step-up DC/DC converter designed to drive white LEDs with a constant current to provide backlight in hand-held devices.
Series connection of LEDs provides identical LED currents resulting in uniform brightness.
This configuration eliminates the need of ballast...


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