HM4021 datasheet(1/9 Pages) HMSEMI

Part #	HM4021

Description	Built-in power stage with low-resistance NMOS FET technology ensures high efficiency and low power consumption

PDF	9 Pages

Scroll/Zoom	100%

Manufacturer	HMSEMI [Shenzhen Huazhimei Semiconductor Co., Ltd]

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

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1. 概述

HM4021 是一款无线充电接收+锂电保护芯片，其集成通讯、高频整流、频率控制、充电状态指

示、过温保护、过流保护、锂电保护等功能，外围器件精简到只需要一个小电容，带上模拟混合数字的

技术，使整机可靠性更高，应用更加灵活简洁。在小体积的产品上应用更加有优势和效率更高。应用范

围广：数码产品（智能手表、手环、耳机

……），以及各类需要防水、外观讲究和充电方便的手持产品。

2. 特性

内置的功率级采用低电阻

NMOS FET 技术确保高效率与低功耗

内置模拟

+数字解调，减少外围器件，通讯更加可靠灵活

充电状态和电池状态可以给指示

免调试，自动连接

自动功率控制

过热保护功能（

OTP）

欠压保护功能

(UVLO)

过流保护功能（

OCP）

短路保护功能（

SCP）

外围电路简单到一个电容，体积小，安装方便

静态电流小于

6uA，过放电保护后电流小于 1uA

电池保护功能

充电电压检测精度高

锂电保护

多芯片并联，增加充电电流

HM4021

无线充电接收

+锂电保护芯片

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