MAX1848 - 白光LED升压型转换器，SOT23封装

MAX1848是Maxim美信半导体公司的一款DC-DC开关调节器产品，MAX1848是白光LED升压型转换器，SOT23封装，本站介绍了MAX1848的封装应用图解、特点和优点、功能等，并给出了与MAX1848相关的Maxim元器件型号供参考。

MAX1848 - 白光LED升压型转换器，SOT23封装 - DC-DC开关调节器 - 电流调节升压转换器，用于白光LED供电，可保持一致亮度 - 美信半导体

产品概述

The MAX1848 drives 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 that the LED currents are identical for uniform brightness. This configuration eliminates the need for ballast resistors and expensive factory calibration. Other benefits include greater simplicity, lower cost, higher efficiency, and greater reliability.

This step-up PWM converter includes an internal, high-voltage, low RDSON N-channel MOSFET switch for high efficiency and maximum battery life. A single analog voltage Dual Mode™ input provides a simple means of brightness adjustment and on/off control. Fast 1.2MHz current-mode PWM control 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.

The MAX1848 is available in space-saving 8-pin thin QFN (3mm x 3mm) and 8-pin SOT23 packages.

关键特性

以下关键特性由Maxim美信半导体提供：

Constant Current Regulation for Uniform Illumination

High 87% Efficiency

Analog or Logic Control of LED Intensity

0.8W Output Power with Internal High-Voltage MOSFET Switch

Small, Low-Profile External Components

2.6V to 5.5V Input Range

13V Maximum Output with Overvoltage Protection

Optimized for Low Input Ripple

Programmable Soft-Start

0.3µA Shutdown Current

Small 8-pin Thin QFN (3mm x 3mm) and 8-Pin SOT23 Packages

热门应用

蜂窝电话/智能电话

电子书与亚笔记本电脑

PDA、掌上电脑与无线手持装置

白色LED显示器背光

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