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LTC4160_15

更新时间： 2022-02-26 14:00:30
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
32页 432K
描述
Switching Power Manager with USB On-The-Go And Overvoltage Protection

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LTC4160_15 数据手册

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LTC4160/LTC4160-1  
Switching Power Manager  
with USB On-The-Go And  
Overvoltage Protection  
FEATURES  
DESCRIPTION  
The LTC®4160/LTC4160-1 are high efficiency power man-  
agementandLi-Ion/PolymerbatterychargerICs.Theyeach  
include a bidirectional switching PowerPath™ controller  
with automatic load prioritization, a battery charger, and  
an ideal diode.  
n
Bidirectional Switching Regulator Makes Optimal  
Use of Limited Power Available from USB Port and  
also Provides a 5V Output for USB On-The-Go  
n
Overvoltage Protection Guards Against Damage  
n
180mΩ Internal Ideal Diode Plus Optional External  
Ideal Diode Controller Seamlessly Provides Low  
Loss PowerPath When Input Power is Limited or  
Unavailable  
TheLTC4160/LTC4160-1’sbidirectionalswitchingregulator  
transfers nearly all of the power available from the USB  
port to the load with minimal loss and heat which eases  
thermalconstraintsinsmallspaces.Thesedevicesfeature  
a precision input current limit for USB compatibility and  
Bat-Trackoutputcontrolforefficientcharging. Inaddition,  
the ICs can also generate 5V at 500mA for USB On-The-  
Go applications.  
n
Instant-On Operation with Discharged Battery  
n
Full Featured Li-Ion/Polymer Battery Charger  
Bat-Track™ Adaptive Output Control For Efficient  
n
Charging  
1.2A Max Input Current Limit  
n
n
1.2A Max Charge Current with Thermal Limiting  
n
An overvoltage circuit protects the LTC4160/LTC4160-1  
from high voltage damage on the USB/wall adapter inputs  
with an external N-channel MOSFET and a resistor.  
Battery Float Voltage: 4.2V (LTC4160), 4.1V  
(LTC4160-1)  
n
Low Battery Powered Quiescent Current (8µA)  
n
20-pin 3mm × 4mm × 0.75mm QFN Package  
The LTC4160/LTC4160-1 are available in a 3mm × 4mm  
× 0.75mm QFN surface mount package.  
L, LT, LTC, LTM, Linear Technology, Burst Mode and the Linear logo are registered trademarks  
and PowerPath and Bat-Track are a trademarks of Linear Technology Corporation. All other  
trademarks are the property of their respective owners. Protected by U.S. Patents including  
6522118, 6404251. Other patents pending.  
APPLICATIONS  
n
Media Players and Personal Navigation Devices  
n
Digital Cameras, PDAs, Smart Phones  
TYPICAL APPLICATION  
USB OTG VBUS Voltage  
High Efficiency Power Manager/Battery Charger with USB  
Battery and VBUS Currents  
vs Load Current  
vs VBUS Current  
On-The-Go and Overvoltage Protection  
5.5  
5.0  
4.5  
USB  
SYSTEM  
LOAD  
750  
500  
250  
V
= BAT = 3.8V  
OUT  
ON-THE-GO  
3.3µH  
Li-Ion  
V
CURRENT  
BUS  
V
SW  
OUT  
USB  
BUS  
LTC4160/  
V
= 4.75V  
BUS  
10µF  
V
10µF  
LTC4160-1  
OVGATE  
OVSENS  
BATTERY CURRENT  
(CHARGING)  
BAT  
+
USB 2.0 SPECIFICATIONS  
REQUIRE THAT HIGH  
POWER DEVICES NOT  
6.2k  
4.0  
3.5  
3.0  
0
–250  
–500  
CLPROG PROG  
V
= 5V  
BUS  
OPTIONAL  
OVERVOLTAGE  
PROTECTION  
BAT = 3.8V  
5x MODE  
OPERATE IN THIS REGION  
3.01k  
1k  
0.1µF  
BATTERY CURRENT  
(DISCHARGING)  
41601 TA01a  
0
100 200 300 400 500 600 700  
CURRENT (mA)  
0
200  
400  
600  
800  
1000  
V
LOAD CURRENT (mA)  
BUS  
41601 TA01b  
41601 TA01c  
41601fa  
1
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