HM225 datasheet(1/6 Pages) HMSEMI

Part #	HM225

Description	capacitive touch dimming chip specially designed for LED desk lamps

PDF	6 Pages

Scroll/Zoom	100%

Manufacturer	HMSEMI [Shenzhen Huazhimei Semiconductor Co., Ltd]

Direct Link	http://www.hmsemi.com/

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一.概述

HM225 是一颗专为 LED 台灯设计的电容式触摸调光芯片，通过触摸键实现 ON/OFF 控制、无级调光或分

段调光控制。具有亮度断电记忆、ON/OFF 亮灭视角缓冲保护眼睛与视力的效果。

二.特点

 工作电压：2.0V~5.5V

 待机工作电流<3uA@3.0V(低功耗模式下)

 电源稳定后，0.5sec 内完成上电初始化

 外部引脚选择多种模式选择

 内置稳压电路，可配置启用或禁止

 灵敏度自动校准功能，工作环境发生变化可以快速自动适应

 亮度随意调节，输出 2KHz 的 PWM 调光信号

 高可靠性，芯片内置去抖动电路，可有效防止外部噪声干扰而导致的误动作

 支持 ON/OFF 模式，3 段调光模式、无级调光模式

 可用于玻璃、陶瓷、塑料等介质表面

 超小封装，可支持 SOP-8/SOT23-6 封装

三．功能模块图

HM225

Shenzhen H&M Semiconductor Co.Ltd

http：//www.hmsemi.com

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