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MAX1561ETA

製品説明
仕様・特性

19-2731; Rev 1; 10/03 KIT ATION EVALU E AILABL AV High-Efficiency, 26V Step-Up Converters for Two to Six White LEDs The MAX1561/MAX1599 step-up converters drive up to six white LEDs with a constant current to provide backlight in cell phones, PDAs, and other hand-held devices. The step-up converter topology allows series connection of the white LEDs so the LED currents are identical for uniform brightness. This configuration eliminates the need for ballast resistors and expensive factory calibration. The MAX1561/MAX1599 include an internal, high-voltage, low-RDS(ON) N-channel MOSFET switch for high efficiency and maximum battery life. A single Dual Mode™ input provides a simple means of brightness adjustment and on/off control. Fast 1MHz (500kHz for the MAX1599) current-mode, pulse-width modulated (PWM) operation allows for small input and output capacitors and a small inductor while minimizing ripple on the input supply/battery. Programmable soft-start eliminates inrush current during startup. Features ♦ Accurate Current Regulation for Uniform Illumination ♦ High Efficiency Up to 87% ♦ Flexible Analog or PWM Dimming Control ♦ Up to 900mW Output Power with Internal 30V MOSFET Switch ♦ Fast 1MHz (MAX1561) or 500kHz (MAX1599) PWM Operation ♦ Small, Low-Profile External Components ♦ 2.6V to 5.5V Input Range ♦ 26V (max) Output with Overvoltage Protection ♦ Optimized for Low 15mVP-P Input Ripple ♦ Soft-Start with Zero Inrush Current ♦ 0.3µA Shutdown Current ♦ Tiny 8-Pin 3mm x 3mm Thin DFN Package Both devices are available in a space-saving, 8-pin 3mm x 3mm thin DFN package with exposed paddle (EP). Ordering Information Applications TOP MARK PART TEMP RANGE PIN-PACKAGE PDAs, Palmtops, and Wireless Handhelds MAX1561ETA -40°C to +85°C 8 TDFN-EP* ACS e-Books and Subnotebooks MAX1599ETA -40°C to +85°C 8 TDFN-EP* AHG Cell Phones and Smart Phones White LED Display Backlighting *EP = Exposed paddle. Pin Configuration Typical Operating Circuit INPUT 2.6V TO 5.5V OUTPUT UP TO 6 LEDs TOP VIEW LX IN MAX1561 MAX1599 OUT OUT 1 PWM OR ANALOG DIMMING MAX1561 MAX1599 7 PGND 6 GND CTRL 3 CTRL PGND COMP CS GND 8 LX IN 2 5 COMP CS 4 3mm × 3mm THIN DFN Dual Mode is a trademark of Maxim Integrated Products, Inc. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX1561/MAX1599 General Description

ブランド

MAXIM

会社名

Maxim Integrated

本社国名

U.S.A

事業概要

アナログおよびミックスドシグナル半導体製品を設計、製造、販売している米国系の株式会社である。 マキシム・インテグレーテッドは、工業、通信、民生、コンピューティングの各市場向けに集積回路を開発しています

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