AIC3643 Built-in OVP White LED Step-Up Converter

Analog Integrations

Description

AIC3643 Built-in OVP White LED Step-Up Converter .
AIC3643 is a current-mode pulse-widthmodulation (PWM), step-up DC/DC converter designed to drive white LEDs with a constant current to provide backlig.

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Datasheet Specifications

Part number: AIC3643
Manufacturer: Analog Integrations
File Size: 326.66 KB
Datasheet: AIC3643_AnalogIntegrations.pdf
Description: 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-

Applications

* Cellular Phones PDAs DSCs Handheld Devices White LED Display Backlighting TYPICAL APPLICATION CIRCUIT 3.0~4.2V C1 1μF L 6.8μH VIN SW D1 C2 3.3μF Efficiency (%) 90 85 VIN=4.2V VIN=3.6V 80 SHDN OVP GND FB RFB 5Ω 20mA 75 VIN=3V AIC3643 L1: GTSD31-6R8M, GOTREND D1: SS0540, PAN JIT C1: JMK107BJ1

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

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