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AIC3643 - Built-in OVP White LED Step-Up Converter

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.

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.

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Datasheet Details

Part number AIC3643
Manufacturer Analog Integrations
File Size 326.66 KB
Description Built-in OVP White LED Step-Up Converter
Datasheet download datasheet AIC3643 Datasheet

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Full PDF Text Transcription

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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 resistors.
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