MAX749 - 数字调节LCD偏置电源

MAX749是Maxim美信半导体公司的一款DC-DC开关调节器产品，MAX749是数字调节LCD偏置电源，本站介绍了MAX749的封装应用图解、特点和优点、功能等，并给出了与MAX749相关的Maxim元器件型号供参考。

MAX749 - 数字调节LCD偏置电源 - DC-DC开关调节器 - 可提供> -100V的驱动 - 美信半导体

产品概述

The MAX749 generates negative LCD-bias contrast voltages from 2V to 6V inputs. Full-scale output voltage can be scaled to -100V or greater, and is digitally adjustable in 64 equal steps by an internal digital-to-analog converter (DAC). Only seven small surface-mount components are required to build a complete supply. The output voltage can also be adjusted using a PWM signal or a potentiometer.

A unique current-limited control scheme reduces supply current and maximizes efficiency, while a high switching frequency (up to 500kHz) minimizes the size of external components. Quiescent current is only 60µA max and is reduced to under 15µA in shutdown mode. While shut down, the MAX749 retains the voltage set point, simplifying software control. The MAX749 drives either an external P-channel MOSFET or a PNP transistor.

关键特性

以下关键特性由Maxim美信半导体提供：

+2.0V to +6.0V Input Voltage Range

Flexible Control of Output Voltage:

Digital Control

Potentiometer Adjustment

PWM Control

Output Voltage Range Set by One Resistor

Low, 60µA Max Quiescent Current

15µA Max Shutdown Mode

Small Size - 8-Pin SO and Plastic DIP Packages

热门应用

通信系统

笔记本电脑

掌上电脑

PDA及其它手持设备

便携式数据收集终端

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