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

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Marke: Microchip
Kategorie: Nicht kategorisiert
Modell: MIC2298

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