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LTC4099EPDC-PBF

Description
I2C Controlled USB Power Manager/Charger with Overvoltage Protection
File Size366KB,36 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
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LTC4099EPDC-PBF Overview

I2C Controlled USB Power Manager/Charger with Overvoltage Protection

FEATURES
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LTC4099
I
2
C Controlled
USB Power Manager/Charger
with Overvoltage Protection
DESCRIPTION
The LTC
®
4099 is an I
2
C controlled high efficiency USB
PowerPath™ controller and full-featured Li-Ion/Polymer
battery charger. It seamlessly manages power distribution
from multiple sources including USB, a wall adapter and
a Li-Ion/Polymer battery.
The LTC4099 automatically limits its input current for
USB compatibility. For automotive and other high volt-
age applications, the LTC4099 interfaces with an external
switching regulator. Both the USB input and the auxiliary
input controller feature Bat-Track optimized charging to
provide maximum power to the application and reduced
heat in high power density applications.
The I
2
C port allows digital control of important application
parameters including input current limit, charge current
and float voltage. Several status bits can also be read back
via I
2
C.
An overvoltage protection circuit guards the LTC4099
from high voltage damage on the low voltage V
BUS
pin.
The LTC4099 is available in the ultra-thin (0.55mm) 20-lead
3mm
×
4mm QFN surface mount package.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
PowerPath and Bat-Track are trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents,
including 6522118, 6570372, 6700364, 6819094. Other patents pending.
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Switching Regulator with Bat-Track
TM
Adaptive Output
Control Makes Optimal Use of Limited Input Power
I
2
C Port for Optimal System Performance and
Status Information
Input Overvoltage Protection
Bat-Track Control of External Step-Down Switching
Regulator Maximizes Efficiency from Automotive
and Other High Voltage Sources
Instant-On Operation with Low Battery
Optional Overtemperature Battery Conditioner
Improves High Temperature Battery Safety Margin
Ideal Diode Seamlessly Connects Battery When Input
Power is Limited or Unavailable
Full-Featured Li-Ion/Polymer Battery Charger
1.5A Maximum Charge Current with Thermal Limiting
Slew Control Reduces Switching EMI
Ultra-Thin (0.55mm) 20-Lead 3mm
×
4mm QFN
APPLICATIONS
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Media Players
Portable Navigation Devices
Smart Phones
Industrial Handhelds
Portable Medical Instruments
TYPICAL APPLICATION
I
2
C Controlled High Efficiency Battery Charger/
USB Power Manager
V
BUS
10μF
OVGATE
6.2k
2
OVSENS
I
2
C
CLPROG PROG
GND
LTC4099
SW
V
OUT
BAT
BATSENS
NTCBIAS
NTC
100k
10μF
SYSTEM
LOAD
POWER DISSIPATION (W)
OVERVOLTAGE
USB PROTECTION
3.3μH
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
Li-Ion
4099 TA01a
Reduced Power Dissipation
vs Linear Battery Charger
LINEAR BATTERY
CHARGER
V
IN
= 5V
I
CHARGE
= 1A
ADDITIONAL POWER
AVAILABLE FOR CHARGING
TO μCONTROLLER
SWITCHING BATTERY
CHARGER
0.1μF
3.01k
1.02k
100k
T
+
0
3.3
3.4
3.5
3.6
3.7
3.8
3.9
4
4.1
4099 TA01b
BATTERY VOLTAGE (V)
4099f
1

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