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LTC4156 PDF预览

LTC4156

更新时间： 2023-12-20 18:46:15
品牌 Logo 应用领域
亚德诺 - ADI 电池
页数 文件大小 规格书
52页 538K
描述
具 I2C 控制和 USB OTG 功能的双通道输入电源管理器 / 3.5A LiFePO4 电池充电器

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中文翻译

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LTC4156 数据手册

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LTC4156  
Dual-Input Power Manager/  
3.5A LiFePO4 Battery Charger  
with I2C Control and USB OTG  
FeaTures  
DescripTion  
2
The LTC®4156 is a 15 watt I C controlled power manager  
n
High Efficiency Charger Capable of 3.5A  
Charge Current  
with PowerPath™ instant-on operation, high efficiency  
switching battery charging and USB compatibility. The  
LTC4156 seamlessly manages power distribution from  
two 5V sources, such as a USB port and a wall adapter, to  
a single-cell rechargeable lithium iron phosphate battery  
and a system load.  
n
Charge Control Algorithm Specifically Designed for  
LiFePO Batteries (Lithium Iron Phosphate)  
4
n
Monolithic Switching Regulator Makes Optimal Use  
of Limited Power and Thermal Budget  
n
Dual Input Overvoltage Protection Controller  
n
Priority Multiplexing for Multiple Inputs  
The LTC4156’s switching battery charger automatically  
limits its input current for USB compatibility, or may  
draw up to 3A from a high power wall adapter. The high  
efficiency step-down switching charger is designed to  
provide maximum power to the application and reduced  
heat in high power density applications.  
2
n
I C/SMBus Control and Status Feedback  
n
NTC Thermistor ADC for Temperature Dependent  
Charge Algorithms (JEITA)  
n
Instant-On Operation with Low Battery  
n
Battery Ideal Diode Controller for Power  
Management  
2
n
I C adjustability of input current, charge current, battery  
USB On-The-Go Power Delivery to the USB Port  
n
float voltage, charge termination, and many other param-  
Four Float Voltage Settings (3.45V, 3.55V, 3.6V, 3.8V)  
2
n
eters allows maximum flexibility. I C status reporting of  
28-Lead 4mm × 5mm QFN Package  
key system and charge parameters facilitates intelligent  
control decisions. USB On-The-Go support provides 5V  
power back to the USB port without any additional com-  
ponents. A dual-input, priority multiplexing, overvoltage  
protection circuit guards the LTC4156 from high voltage  
applicaTions  
n
Portable Medical Devices  
Portable Industrial Devices  
n
n
damage on the V  
pin.  
Backup Devices  
BUS  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
PowerPath and Bat-Track are trademarks of Linear Technology Corporation. All other trademarks  
are the property of their respective owners.  
The LTC4156 is available in the low profile (0.75mm)  
28-lead 4mm × 5mm QFN surface mount package.  
Typical applicaTion  
Switching Regulator Efficiency  
I2C Controlled High Power Battery Charger/USB Power Manager  
100  
90  
1µH  
TO  
WALLSNS  
WALLGT  
SW  
OUT  
SYSTEM  
LOAD  
80  
70  
60  
50  
40  
30  
20  
10  
0
V
CHGSNS  
BATGATE  
BATSNS  
V
V
BUS  
IN  
10µF  
22µF  
LTC4156  
USBGT  
100k  
3.6k  
NTCBIAS  
NTC  
USBSNS  
ID  
3
2
CLPROG2 CLPROG1 PROG  
V
OVGCAP  
I C IRQ GND  
C
V
= 3.3V  
BAT  
1.21k  
499Ω  
47nF  
0
1.0  
1.5  
2.0  
2.5  
3.0  
0.5  
4156 TA01b  
LOAD CURRENT (A)  
4156 TA01a  
4156fa  
1
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