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LTC4156IUFD#TRPBF

产品描述IC POWER LI-ION CHARGER 28-QFN
产品类别半导体    电源管理   
文件大小522KB,共52页
制造商Linear ( ADI )
官网地址http://www.analog.com/cn/index.html
标准
下载文档 详细参数 选型对比 全文预览

LTC4156IUFD#TRPBF概述

IC POWER LI-ION CHARGER 28-QFN

LTC4156IUFD#TRPBF规格参数

参数名称属性值
电池化学磷酸铁锂
电池数1
电流 - 充电恒流 - 可编程
故障保护过压
充电电流 - 最大值3.7A
电池组电压3.8V
电压 - 供电(最高)5.5V
接口I²C,USB
工作温度-40°C ~ 125°C (TJ)
封装/外壳28-WFQFN 裸露焊盘
供应商器件封装28-QFN(4x5)

文档预览

下载PDF文档
LTC4156
Dual-Input Power Manager/
3.5A LiFePO
4
Battery Charger
with I
2
C Control and USB OTG
FeaTures
n
n
DescripTion
The
LTC
®
4156
is a 15 watt I
2
C controlled power manager
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.
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.
I
2
C adjustability of input current, charge current, battery
float voltage, charge termination, and many other param-
eters allows maximum flexibility. I
2
C status reporting of
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
damage on the V
BUS
pin.
The LTC4156 is available in the low profile (0.75mm)
28-lead 4mm
×
5mm QFN surface mount package.
n
n
n
n
n
n
n
n
n
n
High Efficiency Charger Capable of 3.5A
Charge Current
Charge Control Algorithm Specifically Designed for
LiFePO
4
Batteries (Lithium Iron Phosphate)
Monolithic Switching Regulator Makes Optimal Use
of Limited Power and Thermal Budget
Dual Input Overvoltage Protection Controller
Priority Multiplexing for Multiple Inputs
I
2
C/SMBus Control and Status Feedback
NTC Thermistor ADC for Temperature Dependent
Charge Algorithms (JEITA)
Instant-On Operation with Low Battery
Battery Ideal Diode Controller for Power
Management
USB On-The-Go Power Delivery to the USB Port
Four Float Voltage Settings (3.45V, 3.55V, 3.6V, 3.8V)
28-Lead 4mm
×
5mm QFN Package
applicaTions
n
n
n
Portable Medical Devices
Portable Industrial Devices
Backup Devices
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.
Typical applicaTion
I
2
C Controlled High Power Battery Charger/USB Power Manager
1µH
WALLSNS
WALLGT
V
IN
V
BUS
LTC4156
USBGT
USBSNS
ID
I
2
C
IRQ
GND CLPROG2 CLPROG1 PROG V
C
1.21k
499
SW
V
OUT
CHGSNS
BATGATE
BATSNS
NTCBIAS
NTC
OVGCAP
47nF
4156 TA01a
Switching Regulator Efficiency
100
90
80
EFFICIENCY (%)
70
60
50
40
30
20
10
0
0
0.5
2.0
1.5
1.0
LOAD CURRENT (A)
V
BAT
= 3.3V
2.5
3.0
4156 TA01b
TO
SYSTEM
LOAD
10µF
3.6k
3
22µF
100k
4156fa
1

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描述 IC POWER LI-ION CHARGER 28-QFN IC POWER LI-ION CHARGER 28-QFN IC POWER LI-ION CHARGER 28-QFN IC POWER LI-ION CHARGER 28-QFN
电池化学 磷酸铁锂 磷酸铁锂 磷酸铁锂 磷酸铁锂
电池数 1 1 1 1
电流 - 充电 恒流 - 可编程 恒流 - 可编程 恒流 - 可编程 恒流 - 可编程
故障保护 过压 过压 过压 过压
充电电流 - 最大值 3.7A 3.7A 3.7A 3.7A
电池组电压 3.8V 3.8V 3.8V 3.8V
电压 - 供电(最高) 5.5V 5.5V 5.5V 5.5V
接口 I²C,USB I²C,USB I²C,USB I²C,USB
工作温度 -40°C ~ 125°C (TJ) -40°C ~ 125°C (TJ) -40°C ~ 125°C (TJ) -40°C ~ 125°C (TJ)
封装/外壳 28-WFQFN 裸露焊盘 28-WFQFN 裸露焊盘 28-WFQFN 裸露焊盘 28-WFQFN 裸露焊盘
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