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HT4927U Datasheet(PDF) 1 Page - Hotchip Technology Co.,Ltd

Part # HT4927U
Description  Highly integrated, minimal peripheral components
PDF  6 Pages
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Manufacturer  HOTCHIP [Hotchip Technology Co.,Ltd]
Direct Link  http://www.hotchip.com.cn/English/Index/index.html
Logo HOTCHIP - Hotchip Technology Co.,Ltd

HT4927U Datasheet(HTML) 1 Page - Hotchip Technology Co.,Ltd

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HT4927U
Ver1.1
1/6
移动电源管理方案
www.hotchip.com.cn
典型应用电路图
产品概述
HT4927U 是一款集成度非常高的移动电源
管理芯片,内置充电管理模块、LED 指示模
块、升压放电管理模块,并使用小型的 SOT23-
6 封装,外围极少的元件,就可以组成功能强
大的移动电源。
主要特点
◆ 高度集成,极少的外围元器件;
◆ 内置 0.7A(典型值)的线性充电模式;
◆ 涓流/恒流/恒压三段式充电,恒定电压
4.20V(典型值),支持对 0V 电池充电;
◆ 内置充电能根据温升自动降低充电电 流,
130 度开始下降,最低可降至 0;
◆ 充电输入端有防反灌功能,不需要防反 灌
二极管;
◆ 升压使用同步整流电路,效率高达 91%,发
热低,固定 5.1V(典型值)输出,不需要外
部电阻设置;
◆ 输出电流 0.7A(电池 3.6V 时典型值), 具
有恒功率输出功能,有完整的过流, 短路
保护;
◆ 负载插入自动启动升压,负载移除
自动休眠;
◆ 电池低压提醒功能;
◆ 单灯充电与放电指示:
充电时指示灯 LD1 闪烁,充满后指示亮;
放电时指示灯 LD1 亮,当电池电压小于
3.2V(典型值)指示灯 LD1 闪烁,直到
2.95V 欠压关机指示灯 LD1 灭。
◆ 可共用输入/输出端口,智能识别充/放电;
◆ 4KV ESD;
◆ 固定开关频率 1MHZ;
◆ 电池过充、过放保护;
◆ SOT23-6 小型封装
典型应用
◆ 移动电源
◆ LED 照明系统
◆ 玩具
LD1
C2
10uF X 2
L1
2.2uH
C1
10uF
USB-IN
VCC
D-
D+
ID
1
2
3
4
PGND
LED
BTP
VOUT
LX
B-
B+
BTP
2
1
1
2
3
4
VCC
DATA-
DATA+
GND
USB-OUT
U1
HT4927U-D0
AGND
6
5
4
3
2
1
锂电保
GND
5


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