Microchip MIC2298 Bedienungsanleitung

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 2023 Microchip Technology Inc.DS20006794A-page 1

MIC2298

Features

•3.5A Minimum Switch Current Delivers at Least

7W of Output Power Over-Temperature

•200mV ±10% Feedback Voltage

•2.5V to 10V Input Voltage

•Output Voltage up to 30V (Max)

•12-Lead 3mm × 3mm Leadless VDFN Package

•Available Output Over-Voltage Protection (OVP)

•1MHz Operation

•Programmable Output Current

•<1% Line Regulation

•1μA Shutdown Current

•Over Temperature Protection

•Externally Programmable Soft-Start

•Under-Voltage Lockout (UVLO)

•–40°C to +125°C Junction Temperature Range

Applications

•Cell phones

•PDAs

•Digital cameras

•White LED flashlights

General Description

The MIC2298 is a high power boost-switching regulator

that is optimized for constant-current control. The

MIC2298 is capable of driving up to 2 series 1A white

LED for photoflash, flashlight, and other applications.

The feedback voltage is only 200mV, minimizing

ballast power dissipation in constant-current control

applications for improved operating efficiency.

The MIC2298 has a brightness pin that allows for a

programmable torch mode as well full flash with a

single pin when driving high current LEDs.

The MIC2298 implements a constant frequency 1MHz

PWM control scheme to make the smallest possible

design.

The 2.5V to 10V input voltage range of MIC2298 allows

direct operation from 1- and 2-cell Li Ion as well as 3-

to 6-cell NiCad/NiMH/Alkaline battery sources.

Maximum battery life is assured with a low 1μA

shutdown current.

The MIC2298 is available in a low profile 12-lead 3mm

× 3mm VDFN package.

Package Types

MIC2298

3mm × 3mm 12-Lead VDFN

(Top View)

3.5A Minimum, 1MHz Boost High Brightness White LED Driver

Produktspezifikationen