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参数资料
| 型号： | LM3647IMX |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO20 |
| 封装： | PLASTIC, SOIC-20 |
| 文件页数： | 1/14页 |
| 文件大小： | 271K |
| 代理商： | LM3647IMX |
LM3647
Universal Battery Charger for Li-Ion, Ni-MH and Ni-Cd
Batteries
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 charg-
ing or a constant-current charging technique. The device can
also be configured to discharge before charging. Throughout
the charging sequence the LM3647 monitors voltage and/or
temperature and time in order to terminate charging.
Charge termination methods are:
Negative delta voltage (
V)
Optional: Delta temperature/delta time (
T/t)
Backup: Maximum temperature
Backup: Maximum time
Backup: Maximum voltage
If both voltage and temperature fail to trigger the termination
requirements, then the maximum time (configured by exter-
nal hardware) steps in which terminates the charging.
In Ni-Cd/Ni-MH mode, four different charging stages are
used:
Soft-start charge
Fast charge
Topping charge
Maintenance charge
In Li-Ion mode, four different charging stages are used:
Qualification
Fast Charge Phase 1, Constant Current
Fast Charge Phase 2, Constant Voltage
Maintenance charge
The charge current of the LM3647 is configured via external
resistors, which in turn controls the duty cycle of the PWM
switching control output. For cost-sensitive applications, the
LM3647 charge controller cab be configured to use an ex-
ternal current source and no temperature sensor.
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 battery is
installed. Whenever an error occurs (e.g., short circuit, tem-
perature 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 allowed charging
temperature range. The LM3647 is available in a standard
20-lead SOIC surface mount package.
Features
n
Auto-adaptive fast charge
n
High-resolution, accurate voltage monitoring prevents
Li-Ion undercharge or overcharge
n
Fast charge, pre-charge and maintenance currents are
provided. Different currents are selectable via external
resistors.
n
Fast-charge termination by
temperature/ time,
maximum voltage, maximum temperature, negative
voltage and maximum time
n
Dynamically detects battery insertion, removal, short
circuit and bad battery without additional hardware
n
Supports charging of battery packs with 2–8 cells of
Ni-Cd/Ni-MH or 1–4 cells of Li-Ion (1 cell of NiCd/NiMH
can be supported by added external 2x voltage
amplifier)
n
Three optional LED indicators and Buzzer output
indicate operational modes
n
Ni-MH/Ni-Cd charge mode, Li-Ion charge mode or
discharge mode can be selected manually
n
Supports control of current feedback power supply and
constant current power supply
Applications
n
Battery charging systems for:
— Portable consumer electronics
— Audio/video equipment
— Communications equipment
— Point of sale devices
— Power tools
— Personal convenience products
March 2001
LM3647
Universal
Battery
Charger
for
Li-Ion,
Ni-MH
and
Ni-Cd
Batteries
2004 National Semiconductor Corporation
DS101318
www.national.com
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| LM3647M | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Battery Management |
| LM3648EVM | 功能描述:LM3648 1, Non-Isolated Output LED Driver Evaluation Board 制造商:texas instruments 系列:- 零件状态:有效 电流 - 输出/通道:1.5A 输出和类型:1，非隔离 电压 - 输出:- 特性:I2C 电压 - 输入:2.5 V ~ 5.5 V 所含物品:板 使用的 IC/零件:LM3648 标准包装:1 |
| LM3648TTYFFR | 功能描述:LED 驱动器 IC 1 输出 DC DC 稳压器 升压（升压） 调光 1.5A（闪存） 12-DSBGA 制造商:texas instruments 系列:- 包装:剪切带（CT） 零件状态:在售 类型:DC DC 稳压器 拓扑:升压（升压） 内部开关:是 输出数:1 电压 - 供电（最低）:2.5V 电压 -?供电（最高）:5.5V 电压 - 输出:- 电流 - 输出/通道:1.5A（闪存） 频率:4MHz 调光:- 应用:照相机闪光灯 工作温度:-40°C ~ 85°C（TA） 安装类型:表面贴装 封装/外壳:12-UFBGA，DSBGA 供应商器件封装:12-DSBGA 标准包装:1 |
| LM3648YFFR | 功能描述:LED 驱动器 IC 1 输出 DC DC 稳压器 升压（升压） 1.5A（闪存） 12-DSBGA 制造商:texas instruments 系列:- 包装:剪切带（CT） 零件状态:有效 类型:DC DC 稳压器 拓扑:升压（升压） 内部开关:是 输出数:1 电压 - 供电（最低）:2.5V 电压 -?供电（最高）:5.5V 电压 - 输出:- 电流 - 输出/通道:1.5A（闪存） 频率:4MHz 调光:- 应用:照相机闪光灯 工作温度:-40°C ~ 85°C（TA） 安装类型:表面贴装 封装/外壳:12-UFBGA，DSBGA 供应商器件封装:12-DSBGA 标准包装:1 |
| LM3649MHE-AA/NOPB | 制造商:Texas Instruments 功能描述: |
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