LM3647

更新时间： 2024-09-25 22:51:51

品牌	Logo	应用领域
美国国家半导体 - NSC		电池
页数	文件大小	规格书
17页	274K
描述
Universal Battery Charger for Li-Ion, Ni-MH and Ni-Cd Batteries

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

LM3647 数据手册

PRELIMINARY

March 2000

LM3647

Universal Battery Charger

for Li-Ion, Ni-MH and Ni-Cd Batteries

When using an external current source, the current is con-

trolled by the LM3647 which turns the current source on

and off. The LM3647 automatically detects the presence of

a battery and starts the charging procedure when the bat-

tery is installed. Whenever an error occurs (e.g., short cir-

cuit, temperature too high, temperature too low, bad

battery, charge time over, etc.) the LM3647 will stay in error

mode until the battery is removed or it gets within the al-

lowed charging temperature range. The LM3647 is avail-

able in a standard 20-lead SOIC surface mount package.

1.0 General Description

The LM3647 is a charge controller for Lithium-Ion (Li-Ion),

Nickel-Metal Hydride (Ni-MH) and Nickel-Cadmium (Ni-

Cd) batteries. The device can use either a pulsed-current

charging or a constant-current charging technique. The

device can also be conﬁgured to discharge before charg-

ing. Throughout the charging sequence the LM3647 mon-

itors voltage and/or temperature and time in order to

terminate charging.

■ Negative delta voltage (-∆V)

■ Maximum voltage

■ Optional: Delta temperature/delta time (∆T/∆t)

■ Optional: Maximum temperature

■ Backup: Maximum time

Key Features

■ Auto-adaptive fast charge

■ High-resolution, accurate voltage monitoring prevents

Li-Ion undercharge or overcharge

■ Fast charge, pre-charge and maintenance currents are

provided. Different currents are selectable via external

resistors.

■ Fast-charge termination by ∆ temperature/∆ time, maxi-

mum voltage, maximum temperature, negative ∆ volt-

age and maximum time

If both voltage and temperature fail to trigger the termina-

tion requirements, then the maximum time (conﬁgured by

external hardware) steps in which terminates the charging.

In Ni-Cd/Ni-MH mode, four different charging stages are

used:

■ Dynamically detects battery insertion, removal, short

circuit and bad battery without additional hardware

■ Supports charging of battery packs with 2-8 cells of Ni-

Cd/Ni-MH or 1-4 cells of Li-Ion

■ Three LED indicators and Buzzer output indicate oper-

ational modes

■ Soft-start charge

■ Fast charge

■ Topping charge

■ Maintenance charge

In Li-Ion mode, four different charging stages are used:

■ Ni-MH/Ni-Cd charge mode, Li-Ion charge mode or dis-

charge mode can be selected manually

■ PWM switching controller

■ Qualiﬁcation

■ Fast Charge Phase 1, Constant Current

■ Fast Charge phase 2, Constant Voltage

■ Maintenance charge

Applications

The charge current of the LM3647 is conﬁgured via exter-

nal resistors, which in turn controls the duty cycle of the

PWM switching control output. For cost-sensitive applica-

tions, the LM3647 charge controller can be conﬁgured

without a temperature sensor and to use an external cur-

rent source.

■ Battery charging systems for:

— Portable consumer electronics

— Audio/video equipment

— Communications equipment

— Point of sale devices

— Power tools

— Personal convenience products

www.national.com

12 3 4 5 6 7...17

中文翻译

下载PDF

与LM3647相关器件

型号	品牌	获取价格	描述	数据表
LM3647IM	NSC	获取价格	Universal Battery Charger for Li-Ion, Ni-MH and Ni-Cd Batteries
LM3647IM/NOPB	TI	获取价格	IC,BATTERY MANAGEMENT,BIPOLAR,SOP,20PIN,PLASTIC
LM3647M	ETC	获取价格	Battery Management
LM3648	TI	获取价格	具有 1.5A 高侧电流源的 LM3648 同步升压 LED 闪光灯驱动器
LM3648TTYFFR	TI	获取价格	具有 1.5A 高侧电流源的 LM3648 同步升压 LED 闪光灯驱动器 \| YFF \|
LM3648YFFR	TI	获取价格	具有 1.5A 高侧电流源的 LM3648 同步升压 LED 闪光灯驱动器 \| YFF \|
LM3655	NSC	获取价格	Charge Control and Protection IC for embedded single
LM3658	NSC	获取价格	Dual Source USB/AC Li Chemistry Charger IC for Portable Applications
LM3658	TI	获取价格	用于便携式应用的双电源 USB/AC 锂化学充电器 IC
LM3658SD	NSC	获取价格	Dual Source USB/AC Li Chemistry Charger IC for Portable Applications

与LM3647相关文章

塔塔电子与力积电达成技术转让协议，携手建设印度首座晶圆厂
2024-09-29

9
英特尔震撼发布：128核心256线程的至强6性能核处理器
2024-09-29

8
SK海力士量产12层HBM3E，容量高达36GB
2024-09-27

12
意法半导体传感器驱动Sphere，开启沉浸式电影新时代
2024-09-27

19

产品中心

服务支持

精选活动

关于我们

帮助中心

LM3647

LM3647 数据手册

与LM3647相关器件

与LM3647相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

LM3647

LM3647 数据手册

与LM3647相关器件

与LM3647相关文章

您还可以找

您在本页遇到什么问题？