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LTC4098_15

更新时间： 2024-01-13 02:29:38
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
32页 454K
描述
USB Compatible Switching Power Managers/Li-Ion Chargers with Overvoltage Protection

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中文翻译

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LTC4098_15 数据手册

 浏览型号LTC4098_15的Datasheet PDF文件第2页浏览型号LTC4098_15的Datasheet PDF文件第3页浏览型号LTC4098_15的Datasheet PDF文件第4页浏览型号LTC4098_15的Datasheet PDF文件第5页浏览型号LTC4098_15的Datasheet PDF文件第6页浏览型号LTC4098_15的Datasheet PDF文件第7页 
LTC4098/LTC4098-1  
USB Compatible Switching  
Power Managers/Li-Ion Chargers  
with Overvoltage Protection  
DESCRIPTION  
FEATURES  
The LTC®4098/LTC4098-1 are high efficiency USB Power-  
Path controllers and full-featured Li-Ion/Polymer battery  
chargers.Theyseamlesslymanagepowerdistributionfrom  
multiple sources including USB, wall adapter, automotive,  
Firewire or other high voltage DC/DC converters, and a  
Li-Ion/Polymer battery.  
n
Switching Regulator with Bat-Track™ Adaptive  
Output Control Makes Optimal Use of Limited  
Power Available from USB Port to Charge Battery  
and Power Application  
n
n
Overvoltage Protection Guards Against Damage  
Bat-Track External Step-Down Switching Regulator  
Control Maximizes Efficiency from Automotive,  
Firewire and Other High Voltage Input Sources  
180mΩ Internal Ideal Diode Plus External Ideal Diode  
Controller Seamlessly Provide Low Loss PowerPath™  
when Input Power is Limited or Unavailable  
Preset 4.2V Charge Voltage with 0.5% Accuracy  
(4.1V for LTC4098-1)  
4.1V Float Voltage (LTC4098-1) Improves Battery Life  
and High Temperature Safety Margin  
Instant-On Operation with Discharged Battery  
700mA Maximum Load Current from USB Port  
1.5A Maximum Charge Current with Thermal Limiting  
20-Lead 3mm × 4mm × 0.75mm QFN Package  
The LTC4098/LTC4098-1’s internal switching regulator  
automaticallylimitsitsinputcurrentforUSBcompatibility.  
For automotive and other high voltage applications, the  
LTC4098/LTC4098-1 interface with a Linear Technology  
external switching regulator to provide a high efficiency  
high voltage power path. Both the USB and the optional  
high voltage inputs feature Bat-Track optimized charging  
to provide maximum power to the application and ease  
thermal issues in high power density applications with  
input supplies from 5V to as high as 38V.  
n
n
n
n
n
n
n
An overvoltage circuit protects the LTC4098/LTC4098-1  
from high voltage damage on the USB/wall adaptor inputs  
with an N-channel FET and a resistor.  
APPLICATIONS  
The LTC4098/LTC4098-1 are available in a 20-lead, 3mm  
n
Media Players  
× 4mm × 0.75mm QFN surface mount package.  
n
GPS  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
Bat-Track and PowerPath are trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
n
PDAs  
Smart Phones  
n
TYPICAL APPLICATION  
USB Switching Regulator Efficiency  
High Efficiency USB/Automotive Battery Charger with Overvoltage Protection  
to System Load (PVOUT/PVBUS  
)
INPUT  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
AUTOMOTIVE,  
FIREWIRE, ETC.  
LT3653  
3.3μH  
SYSTEM  
LOAD  
INPUT  
USB  
BAT = 4.2V  
BAT = 3.3V  
V
BUS  
V
WALL  
SW  
V
C
10μF  
OVGATE  
OVSENS  
D0-D2  
OUT  
LTC4098/LTC4098-1  
6.04k  
3
TO μC  
BAT  
CLPROG  
PROG  
GND BATSENS  
V
I
= 5V  
10μF  
BUS  
= 0mA  
BAT  
10x MODE  
+
0.1μF 3.01k  
1k  
Li-Ion  
0.01  
0.1  
1
40981 TA01a  
I
(A)  
VOUT  
40981 TA01b  
40981fc  
1
1234567...32

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