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LT1620CMS8 PDF预览

LT1620CMS8

更新时间: 2024-02-05 14:28:37
品牌 Logo 应用领域
凌特 - Linear 放大器
页数 文件大小 规格书
12页 286K
描述
Rail-to-Rail Current Sense Amplifier

LT1620CMS8 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:TSSOP,
针数:8Reach Compliance Code:compliant
风险等级:5.02模拟集成电路 - 其他类型:ANALOG CIRCUIT
JESD-30 代码:S-PDSO-G8JESD-609代码:e3
长度:3 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:
封装主体材料:PLASTIC/EPOXY封装代码:TSSOP
封装形状:SQUARE封装形式:SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度(摄氏度):260认证状态:Not Qualified
座面最大高度:1.17 mm最大供电电压 (Vsup):5.5 V
最小供电电压 (Vsup):4.5 V标称供电电压 (Vsup):5 V
表面贴装:YES温度等级:COMMERCIAL
端子面层:Matte Tin (Sn)端子形式:GULL WING
端子节距:0.65 mm端子位置:DUAL
处于峰值回流温度下的最长时间:30宽度:3 mm
Base Number Matches:1

LT1620CMS8 数据手册

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LT1620/LT1621  
Rail-to-Rail Current  
Sense Amplifier  
U
DESCRIPTIO  
EATURE  
S
F
The LT®1620 simplifies the design of high performance,  
controlled current battery charging circuits when used in  
conjunction with a current mode PWM controller IC.  
Accurate Output Current Programming  
Usable in Charging Applications Up to 32V Output  
Programmable Load Current Monitor for End-of-  
Charging-Cycle Notification (16-Pin Version)  
Dual Function IC (LT1621) Allows Convenient  
Integration of Load and Input Current Sensing  
Level-Shifted Current Sense Output for Current Mode  
PWM Controllers  
TheLT1620regulatesaverageoutputcurrentindependent  
of input and output voltage variations. Output current can  
be easily adjusted via a programming voltage applied to  
the LT1620’s PROG pin.  
Most current mode PWM controllers have limited output  
voltagerangebecauseofcommonmodelimitationsonthe  
current sense inputs. The LT1620 overcomes this restric-  
tion by providing a level-shifted current sense signal,  
allowing a 0V to 32V output voltage range.  
Can be Used for NiCd, NiMH, Lead-Acid and Lithium-  
Ion Battery Charging  
Greater than 96% Efficiency Possible in Charger  
Applications  
High Output Currents Possible: > 10A  
Easily Obtained  
The 16-pin version of the LT1620 contains a program-  
mable low charging current flag output. This output flag  
can be used to signal when a Li-Ion battery charging cycle  
is nearing completion.  
O U  
PPLICATI  
A
S
High Current Battery Chargers  
High Output Voltage DC/DC Converters  
Constant Current Sources  
The LT1621 incorporates two fully independent current  
control circuits for dual loop applications.  
Overcurrent Fault Protectors  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
O
TYPICAL APPLICATI  
(V  
+ 0.5V) TO 32V  
BATT  
V
IN  
V
IN  
+
22µF  
LTC1435  
Efficiency  
35V  
SYNCHRONOUS  
BUCK  
100  
95  
× 2  
V
= 24V  
IN  
I
TO 4A  
V
= 16V  
= 12V  
BATT  
BATT  
REGULATOR  
V
I
SW  
BATT  
TH  
0.025Ω  
1.43M  
0.1%  
27µH  
SENSE  
V
BATT  
+
INTV  
FB  
CC  
22µF  
35V  
90  
V
= 6V  
BATT  
0.1µF  
0.1µF  
110k  
0.1%  
6
3k  
1%  
85  
80  
75  
V
CC  
1
2
8
SENSE  
AVG  
7
5
I
PROG  
LT1620MS8  
OUT  
15.75k  
1%  
3
4
GND  
+
IN  
IN  
0
1
2
3
4
5
LT1620/21 • F01  
BATTERY CHARGE CURRENT (A)  
SIMPLIFIED SCHEMATIC. SEE FIGURE 2 FOR COMPLETE SCHEMATIC  
1620/21 • TA02  
Figure 1. Low Dropout, High Current Li-Ion Battery Charger  
1

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IC SPECIALTY ANALOG CIRCUIT, PDSO8, 0.150 INCH, PLASTIC, SO-8, Analog IC:Other