MAX1698A中文资料高效率、升压型稳流器，用于LED驱动数据手册ADI规格书

描述 Description

The MAX1698 and MAX1698A are efficient drivers for white or color LEDs. They are ideal for large LED backlit displays in PDAs and laptop computers. Numerous benefits include greater simplicity, lower cost, higher efficiency, longer bulb life, and greater reliability when compared to fluorescent (CCFL) and electroluminescent (EL) lamps.
The MAX1698/MAX1698A are switch-mode boost controllers in which LED current, rather than output voltage, is regulated The devices drive series-connected LEDs with a controlled current that is measured with a typically 15Ω sense resistor, not an expensive fractional-ohm value. LED current control and dimming are accomplished with an adjust input (ADJ). For larger light output, multiple LED banks can be connected in parallel with up to 5W total output power.
The MAX1698A has a higher, and more accurately specified, CS current limit than the MAX1698 for higherpower applications of 5W or more. Both devices are supplied in a space-saving 10-pin µMAX package that occupies half the space of an 8-pin SO. An evaluation kit (MAX1698EVKIT) is available to speed designs.

特性 Features

• Over 90% Efficiency
• Lossless, Adjustable LED Brightness
• Space-Saving 10-Pin µMAX Package
• Simpler, Lower Cost, More Reliable Compared to CCFL or EL Backlights
• Up to 5W Output Power

应用 Application

• LCD板背光
• 电池供电背光应用
• 蜂窝电话
• 手持终端
• PDA

简介

MAX1698A属于集成电路（IC）的LED驱动器。由ADI制造生产的MAX1698ALED 驱动器器件属于 LED 驱动器电源管理集成电路 (PMIC) 系列，可通过标称固定电压的电源为负载（通常为发光二极管）提供电流，并且电流可控。它与用于电压调节的类似产品的主要区别在于，这类器件提供较低的反馈电压（以提高系统能效），而且通常可对器件工作点进行外部控制，可在照明应用中用于实现调光功能。