Charger. LTC4155IUFD Datasheet

LTC4155IUFD Datasheet PDF

Part LTC4155IUFD
Description Dual-Input Power Manager / 3.5A Li-Ion Battery Charger
Feature LTC4155IUFD; LTC4155 Dual-Input Power Manager/ 3.5A Li-Ion Battery Charger with I2C Control and USB OTG Feature.
Manufacture Linear
Datasheet
Download LTC4155IUFD Datasheet




LTC4155IUFD
LTC4155
Dual-Input Power Manager/
3.5A Li-Ion Battery Charger with
I2C Control and USB OTG
Features
n High Efficiency Charger Capable of 3.5A
Charge Current
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
n I2C/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
n USB On-The-Go Power Delivery to the USB Port
n Full Featured Li-Ion/Polymer Battery Charger with
Four Float Voltage Settings
n 28-Lead 4mm × 5mm QFN Package
Applications
n Tablet PCs
n Ultra Mobile PCs
n Video Media Players
n Digital Cameras, GPS, PDAs
n Smart Phones
n Portable Medical 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.
Description
The LTC®4155 is a 15 watt I2C controlled power manager
with PowerPath™ instant-on operation, high efficiency
switching battery charging and USB compatibility. The
LTC4155 seamlessly manages power distribution from
two 5V sources, such as a USB port and a wall adapter,
to a single-cell rechargeable Lithium-Ion/Polymer battery
and a system load.
The LTC4155’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.
I2C adjustability of input current, charge current, battery
float voltage, charge termination, and many other param-
eters allows maximum flexibility. I2C 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 LTC4155 from high voltage
damage on the VBUS pin.
The LTC4155 is available in the low profile (0.75mm)
28-lead 4mm × 5mm QFN surface mount package.
Typical Application
I2C Controlled High Power Battery Charger/USB Power Manager
WALLSNS
WALLGT
1µH
SW
VOUT
TO
SYSTEM
LOAD
VIN
VBUS
10µF
CHGSNS
LTC4155
BATGATE
22µF
USBGT
BATSNS
3.6k
100k
USBSNS
NTCBIAS
ID
NTC
3 I2C IRQ GND CLPROG2 CLPROG1 PROG VC OVGCAP
1.21k 499Ω
47nF
4155 TA01a
Switching Regulator Efficiency
100
90
80
70
60
50
40
30
20
10
VBAT = 3.9V
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
LOAD CURRENT (A)
4155 TA01b
For more information www.linear.com/LTC4155
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LTC4155IUFD
LTC4155
Table of Contents
Features............................................................................................................................. 1
Applications........................................................................................................................ 1
Typical Application ................................................................................................................ 1
Description......................................................................................................................... 1
Absolute Maximum Ratings...................................................................................................... 3
Order Information.................................................................................................................. 3
Pin Configuration.................................................................................................................. 3
Electrical Characteristics......................................................................................................... 4
Typical Performance Characteristics........................................................................................... 9
Pin Functions......................................................................................................................12
Block Diagram.....................................................................................................................15
Timing Diagrams.................................................................................................................16
Operation.......................................................................................................................... 17
I2C......................................................................................................................................................................... 17
Applications Information........................................................................................................40
Typical Applications..............................................................................................................47
Package Description.............................................................................................................51
Typical Application...............................................................................................................52
Related Parts......................................................................................................................52
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For more information www.linear.com/LTC4155



LTC4155IUFD
LTC4155
Absolute Maximum Ratings
(Notes 1, 2)
VBUS (Transient) t < 1ms, Duty Cycle < 1%.... –0.3V to 7V
VBUS (Steady State), BATSNS, IRQ, NTC....... –0.3V to 6V
DVCC, SDA, SCL (Note 3).........................–0.3V to VMAX
IWALLSNS, IUSBSNS................................................ ±20mA
INTCBIAS, IIRQ...........................................................10mA
ISW, IVOUT, ICHGSNS (Both Pins in Each Case)...............4A
Operating Junction Temperature Range.... –40°C to 125°C
Storage Temperature Range................... –65°C to 150°C
Pin Configuration
TOP VIEW
28 27 26 25 24 23
SDA 1
DVCC 2
IRQ 3
22 VOUT
21 VOUT
20 CHGSNS
ID 4
CLPROG1 5
29
19 CHGSNS
GND
18 PROG
CLPROG2 6
17 BATGATE
WALLSNS 7
16 BATSNS
USBSNS 8
15 NTC
9 10 11 12 13 14
UFD PACKAGE
28-LEAD (4mm × 5mm) PLASTIC QFN
TJMAX = 125°C, θJA = 43°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
Order Information
LEAD FREE FINISH TAPE AND REEL
PART MARKING* PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC4155EUFD#PBF LTC4155EUFD#TRPBF 4155
28-Lead (4mm × 5mm × 0.75mm) Plastic QFN –40°C to 125°C
LTC4155IUFD#PBF LTC4155IUFD#TRPBF 4155
28-Lead (4mm × 5mm × 0.75mm) Plastic QFN –40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/. Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
For more information www.linear.com/LTC4155
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