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LTC4008 PDF预览

LTC4008

更新时间： 2024-02-29 05:11:02
品牌 Logo 应用领域
凌特 - Linear 电池
页数 文件大小 规格书
20页 242K
描述
4A, High Efficiency, Standalone Li Battery Charger

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中文翻译

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LTC4008 技术参数

是否无铅： 含铅是否Rohs认证： 符合
生命周期：Active包装说明：SSOP,
针数：20Reach Compliance Code：compliant
风险等级：5.35可调阈值：YES
模拟集成电路 - 其他类型：POWER SUPPLY MANAGEMENT CIRCUITJESD-30 代码：R-PDSO-G20
JESD-609代码：e3长度：8.649 mm
湿度敏感等级：1信道数量：1
功能数量：1端子数量：20
最高工作温度：70 °C最低工作温度：
封装主体材料：PLASTIC/EPOXY封装代码：SSOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, SHRINK PITCH
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：1.75 mm最大供电电压 (Vsup)：28 V
最小供电电压 (Vsup)：6 V标称供电电压 (Vsup)：20 V
表面贴装：YES技术：CMOS
温度等级：COMMERCIAL端子面层：Matte Tin (Sn)
端子形式：GULL WING端子节距：0.635 mm
端子位置：DUAL处于峰值回流温度下的最长时间：30
宽度：3.899 mm

LTC4008 数据手册

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Final Electrical Specifications  
LTC4007  
4A, High Efficiency,  
Standalone Li Battery Charger  
January 2003  
U
FEATURES  
DESCRIPTION  
The LTC®4007 is a complete constant-current/constant-  
voltage charger controller for 3- or 4-cell lithium-ion  
batteries.ThePWMcontrollerusesasynchronous,quasi-  
constant frequency, constant off-time architecture that  
will not generate audible noise even when using ceramic  
capacitors. Charging current is programmable to ±5%  
accuracyusingaprogrammingresistor.Chargingcurrent  
can also be monitored as a voltage across the program-  
ming resistor.  
■
Complete Charger Controller for 3- or 4-Cell  
Lithium-Ion Batteries  
■
High Conversion Efficiency: Up to 96%  
■
Output Currents Exceeding 4A  
±0.8% Charging Voltage Accuracy  
Built-In Charge Termination for Li-Ion Batteries  
■
■
■
AC Adapter Current Limiting Maximizes Charge Rate*  
Thermistor Input for Temperature Qualified Charging  
Wide Input Voltage Range: 6V to 28V  
0.5V Dropout Voltage; Maximum Duty Cycle: 98%  
Programmable Charge Current: ±5% Accuracy  
Indicator Outputs for Charging, C/10 Current  
Detection, AC Adapter Present, Low Battery, Input  
Current Limiting and Faults  
■
■
■
■
■
The output float voltage is pin programmed for cell count  
(3 cells or 4 cells) and chemistry (4.2V/4.1V). A timer,  
programmed by an external resistor, sets the total charge  
time.Chargingisautomaticallyrestartedwhencellvoltage  
falls below 3.9V/cell.  
■
■
Charging Current Monitor Output  
Available in a 24-Pin Narrow SSOP Package  
LTC4007 includes a thermistor input, which suspends  
charging if an unsafe temperature condition is detected. If  
the cell voltage is less than 2.5V, a low-battery indicator  
asserts and can be used to program a trickle charge cur-  
rent to safely charge depleted batteries. The FAULT pin is  
also asserted and charging terminates if the low-battery  
conditionpersistsformorethan1/4ofthetotalchargetime.  
U
APPLICATIO S  
■
Notebook Computers  
■
Portable Instruments  
■
Battery-Backup Systems  
Standalone Li-Ion Chargers  
■
, LTC and LT are registered trademarks of Linear Technology Corporation.  
*U.S. Patent No. 5,723,970  
U
TYPICAL APPLICATIO  
12.6V, 4A Li-Ion Battery Charger  
INPUT SWITCH  
DCIN  
0V TO 28V  
0.1µF  
4.9k  
3C4C  
DCIN  
INFET  
CLP  
V
LOGIC  
0.025Ω  
15nF  
100k  
100k 100k  
CHEM  
LOBAT  
SYSTEM  
LOAD  
LOBAT  
I
I
LTC4007 CLN  
TGATE  
CL  
CL  
20µF  
ACP  
SHDN  
FAULT  
CHG  
ACP  
Q1  
10µH  
0.025Ω  
SHDN  
BGATE  
Li-Ion  
BATTERY  
Q2  
FAULT  
CHG  
PGND  
CSP  
20µF  
3.01k  
FLAG  
FLAG  
NTC  
BAT  
32.4k  
3.01k  
PROG  
ITH  
CHARGING  
CURRENT  
MONITOR  
R
T
THERMISTOR  
0.0047µF  
0.47µF  
GND  
6.04k  
0.12µF  
10k  
NTC  
Q1: Si4431DY  
Q2: FDC6459  
TIMING RESISTOR  
(~2 HOURS)  
26.7k  
309k  
4007 TA01  
4007i  
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.  
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-  
tation that the interconnection of its circuits as described herein will notinfringe onexisting patent rights.  
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中文翻译

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