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LT1512CS8#TR PDF预览

LT1512CS8#TR

更新时间： 2024-01-17 05:22:59
品牌 Logo 应用领域
凌特 - Linear 电池光电二极管
页数 文件大小 规格书
12页 226K
描述
LT1512 - SEPIC Constant-Current/Constant-Voltage Battery Charger; Package: SO; Pins: 8; Temperature Range: 0°C to 70°C

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LT1512CS8#TR 技术参数

是否Rohs认证： 不符合生命周期：Active
包装说明：SOP,Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.26模拟集成电路 - 其他类型：BATTERY CHARGE CONTROLLER
控制模式：CURRENT-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：25 V最小输入电压：2.7 V
标称输入电压：5 VJESD-30 代码：R-PDSO-G8
JESD-609代码：e0长度：4.9025 mm
湿度敏感等级：1功能数量：1
端子数量：8最高工作温度：70 °C
最低工作温度：最大输出电流：2.7 A
标称输出电压：1.245 V封装主体材料：PLASTIC/EPOXY
封装代码：SOP封装形状：RECTANGULAR
封装形式：SMALL OUTLINE峰值回流温度（摄氏度）：235
认证状态：Not Qualified座面最大高度：1.752 mm
最大供电电流 (Isup)：5.5 mA表面贴装：YES
切换器配置：SINGLE最大切换频率：580 kHz
技术：BIPOLAR温度等级：COMMERCIAL
端子面层：Tin/Lead (Sn/Pb)端子形式：GULL WING
端子节距：1.27 mm端子位置：DUAL
处于峰值回流温度下的最长时间：20宽度：3.9 mm

LT1512CS8#TR 数据手册

 浏览型号LT1512CS8#TR的Datasheet PDF文件第2页浏览型号LT1512CS8#TR的Datasheet PDF文件第3页浏览型号LT1512CS8#TR的Datasheet PDF文件第4页浏览型号LT1512CS8#TR的Datasheet PDF文件第5页浏览型号LT1512CS8#TR的Datasheet PDF文件第6页浏览型号LT1512CS8#TR的Datasheet PDF文件第7页 
LT1512  
SEPIC Constant-Current/  
Constant-Voltage  
Battery Charger  
U
DESCRIPTION  
FEATURES  
The LT®1512 is a 500kHz current mode switching regula-  
tor specially configured to create a constant-current/  
constant-voltage battery charger. In addition to the usual  
voltage feedback node, it has a current sense feedback  
circuitforaccuratelycontrollingoutputcurrentofaflyback  
or SEPIC (Single-Ended Primary Inductance Converter)  
topology charger. These topologies allow the current  
sense circuit to be ground referred and completely sepa-  
rated from the battery itself, simplifying battery switching  
and system grounding problems. In addition, these to-  
pologies allow charging even when the input voltage is  
lower than the battery voltage.  
■
Charger Input Voltage May Be Higher, Equal to or  
Lower Than Battery Voltage  
■
Charges Any Number of Cells Up to 30V*  
■
1% Voltage Accuracy for Rechargeable Lithium  
Batteries  
■
100mV Current Sense Voltage for High Efficiency  
■
Battery Can Be Directly Grounded  
■
500kHz Switching Frequency Minimizes  
Inductor Size  
■
Charging Current Easily Programmable or Shut Down  
U
APPLICATIONS  
Maximum switch current on the LT1512 is 1.5A. This  
allows battery charging currents up to 1A for a single  
lithium-ioncell. Accuracyof1%inconstant-voltagemode  
is perfect for lithium battery applications. Charging cur-  
rent can be easily programmed for all battery types.  
■
Battery Charging of NiCd, NiMH, Lead-Acid  
or Lithium Rechargeable Cells  
■
Precision Current Limited Power Supply  
■
Constant-Voltage/Constant-Current Supply  
Transducer Excitation  
■
, LTC and LT are registered trademarks of Linear Technology Corporation.  
*Maximum Input Voltage = 40V – VBAT  
U
Maximum Charging Current  
TYPICAL APPLICATION  
1.0  
SINGLE  
L1 A*  
WALL  
ADAPTER  
INPUT  
•
LITHIUM  
C2**  
D1  
0.8  
0.6  
0.4  
0.2  
0
CELL (4.1V)  
C3  
22µF  
25V  
+
2.2µF  
MBRS130LT3  
V
IN  
V
SW  
0.5A  
CHARGE  
DOUBLE  
LITHIUM  
CELL (8.2V)  
L1 B*  
SYNC  
LT1512  
R1  
AND/OR  
S/S  
•
FB  
SHUTDOWN  
6V BATTERY  
12V BATTERY  
SHUTDOWN  
GND GND S V  
I
FB  
+
C
C1  
22µF  
25V  
R4  
24Ω  
R2  
C5  
0.1µF  
INDUCTOR = 33µH  
15  
20  
INPUT VOLTAGE (V)  
R3  
R5  
1k  
C4  
0.22µF  
0.2Ω  
0
5
10  
25  
*L1 A, L1 B ARE TWO 33µH WINDINGS ON A  
SINGLE INDUCTOR: COILTRONICS CTX33-3  
1512 TA02  
ACTUAL PROGRAMMED CHARGING CURRENT WILL BE INDEPENDENT OF  
INPUT VOLTAGE AND BATTERY VOLTAGE IF IT DOES NOT EXCEED THE  
VALUES SHOWN. THESE ARE ELECTRICAL LIMITATIONS BASED ON MAXIMUM  
SWITCH CURRENT. PACKAGE THERMAL LIMITATIONS MAY REDUCE  
MAXIMUM CHARGING CURRENT. SEE APPLICATIONS INFORMATION.  
**TOKIN CERAMIC 1E225ZY5U-C203-F  
1512 F01  
Figure 1. SEPIC Charger with 0.5A Output Current  
1
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