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LTC3557-1 PDF预览

LTC3557-1

更新时间： 2024-02-22 21:30:56
品牌 Logo 应用领域
凌特 - Linear 电池
页数 文件大小 规格书
24页 303K
描述
High Efficiency Battery Charger/USB Power Manager

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中文翻译

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LTC3557-1 数据手册

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LTC4088-1/LTC4088-2  
High Efficiency Battery  
Charger/USB Power Manager  
with Regulated Output Voltage  
DescripTion  
FeaTures  
The LTC®4088-1/LTC4088-2 is a high efficiency USB  
PowerPath™ controller and Li-Ion/Polymer battery char-  
ger. It includes a synchronous switching input regulator,  
n
Switching Regulator Makes Optimal Use of Limited  
Power Available from USB Port to Charge Battery  
and Power Application  
n
n
180mΩ Internal Ideal Diode Plus External Ideal Diode a full-featured battery charger and an ideal diode. De-  
Controller Seamlessly Provide Low Loss Power Path  
When Input Power is Limited or Unavailable  
signed specifically for USB applications, the LTC4088-1/  
LTC4088-2’s switching regulator automatically limits its  
Automatic Charge Current Reduction Maintains 3.6V input current to either 100mA, 500mA or 1A via logic  
Minimum V  
control. The LTC4088-1 powers-up with the charger off;  
the LTC4088-2 powers-up with the charger on.  
OUT  
n
n
Full Featured Li-Ion/Polymer Battery Charger  
V
Operating Range: 4.25V to 5.5V (7V Absolute  
BUS  
The switching input stage provides power to V  
where  
OUT  
Maximum—Transient)  
power sharing between the application circuit and the  
battery charger is managed. Charge current is automati-  
n
n
n
n
n
1.2A Maximum Input Current Limit  
1.5A Maximum Charge Current with Thermal Limiting  
Bat-Track™ Adaptive Output Control  
Slew Control Reduces Switching EMI  
Low Profile (0.75mm) 14-Lead 4mm × 3mm DFN Package  
cally reduced to maintain a regulated 3.6V V  
during  
OUT  
low-battery conditions. As the battery is charged, V  
OUT  
tracks V  
for high efficiency charging. This feature al-  
BAT  
lows the LTC4088-1/LTC4088-2 to provide more power  
to the application and eases thermal issues in constrained  
applications.  
applicaTions  
n
Media Players  
An ideal diode ensures that system power is available  
from the battery when the input current limit is reached  
or if the USB or wall supply is removed.  
n
Digital Cameras  
n
GPS  
PDAs  
Smart Phones  
n
n
The LTC4088-1/LTC4088-2 is available in the low profile  
14-Lead 4mm × 3mm × 0.75mm DFN surface mount  
package.  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
PowerPath and Bat-Track are tradmearks of Linear Technology Corporation. All other trademarks  
are the property of their respective owners. Protected by U.S. Patents, including 6522118.  
Typical applicaTion  
Switching Regulator Efficiency to  
System Load (POUT/PBUS  
)
High Efficiency Battery Charger/USB Power Manager  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
3.3µH  
WALL  
SYSTEM  
LOAD  
BAT = 4.2V  
USB  
V
D0  
D1  
D2  
V
OUT  
V
OUTS  
GATE  
SW  
BUS  
10µF  
BAT = 3.3V  
LTC4088-1/LTC4088-2  
CHRG  
BAT  
CLPROG  
PROG C/X GND NTC  
10µF  
+
8.2Ω  
0.1µF  
Li-Ion  
V
I
= 5V  
BUS  
2.94k  
499Ω  
= 0mA  
BAT  
408812 TA01a  
10x MODE  
0
0.01  
0.1  
(A)  
1
I
408812 TA01b  
OUT  
40881fc  
1
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中文翻译

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