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LTC4062EDD#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
LTC4062
1
4062fb
■
Charge Current Programmable Up to 1A
■
Charges Single-Cell Li-Ion Batteries Directly from
USB Port
■
Preset Float Voltage with
±
0.35% Accuracy
■
Micropower Comparator for Battery Monitoring
■
Thermal Regulation Maximizes Charge Rate
Without Risk of Overheating
■
Programmable Charge Current Detection/
Termination
■
Programmable Charge Termination Timer
■
Smart Pulsing Error Feature
■
SmartStart
TM
Prolongs Battery Life
■
20µA Charger Quiescent Current in Shutdown
■
Available in a Low Profile (0.75mm) 10-Lead
(3mm × 3mm) DFN Package
TYPICAL APPLICATIO
U
FEATURES
DESCRIPTIO
U
Standalone Linear Li-Ion
Battery Charger with
Micropower Comparator
APPLICATIO S
U
■
Handheld Computers
■
Portable MP3 Players
■
Digital Cameras
Complete Charge Cycle (1100mAh Battery)
The LTC
®
4062 is a full-featured, flexible, standalone linear
charger for single-cell Lithium-Ion batteries. It is capable
of operating within USB power specifications.
Both programmable time and programmable current based
termination schemes are available. Furthermore, the CHRG
open-drain status pin can be programmed to indicate the
battery charge state according to the needs of the applica-
tion. A precise low power comparator is available even
with no power applied as long as battery voltage is higher
than 2.5V. Additional safety features designed to maxi-
mize battery lifetime and reliability include the SmartStart
charging algorithm.
No external sense resistor or external blocking diode is
required for charging due to the internal MOSFET architec-
ture. Internal thermal feedback regulates the charge cur-
rent to maintain a constant die temperature during high
power operation or high ambient temperature conditions.
The charge current is programmed with an external resis-
tor. With power applied, the LTC4062 can be put into
shutdown mode to reduce the supply current to 20µA and
the battery drain current to less than 5µA. Without power
applied, the internal low power comparator can work
sinking only 10µA from the battery.
Other features include smart recharge, USB C/5 current
programming input and undervoltage lockout.
TIME (HOURS)
0 0.5 1.5 2.5 3.0
CHARGE CURRENT (mA)
BATTERY VOLTAGE (V)
2.0
900
800
700
600
500
400
300
200
100
0
4.3
4.2
4.1
4.0
3.9
3.8
3.7
3.6
3.5
3.4
4062 TA01b
1.0
BATTERY
CURRENT
BATTERY
VOLTAGE
V
CC
= 5V
T
A
= 25°C
800mA Single-Cell Li-Ion Battery Charger
(C/10 Termination)
+
TIMER
PROG
EN
C/5
I
OUT
BAT
V
IN
4.3V TO 8V
IN
+
DET
LTC4062
GND
619Ω
100k
715k
347k
800mA
1µF
4062 TA01
SINGLE-CELL
Li-Ion BATTERY
V
CC
BAT > 3V BAT < 3V
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
SmartStart is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 6522118.
LTC4062
2
4062fb
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
(Note 1)
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, unless otherwise noted.
Input Supply Voltage (V
CC
) ........................ –0.3V to 10V
EN, OUT, CHRG, IN
+
, PROG, C/5, BAT ....... –0.3V to 10V
TIMER, I
DET
..................................... –0.3V to V
CC
+0.3V
BAT Short-Circuit Duration ...........................Continuous
V
CC
Pin Current ......................................................... 1A
BAT Pin Current ......................................................... 1A
Maximum Junction Temperature .......................... 125°C
Operating Temperature Range (Note 2) ... –40°C to 85°C
Storage Temperature Range .................. –65°C to 125°C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Input Supply Voltage ● 4.3 8 V
I
CC
Input Supply Current Charge Mode (Note 4), R
PROG
= 10k ● 240 500 µA
Standby Mode, Charge Terminated
● 130 300 µA
Shutdown (EN = 5V, V
CC
< V
BAT
or V
CC
< V
UV
) ● 20 50 µA
V
FLOAT
V
BAT
Regulated Output Voltage 4.185 4.2 4.215 V
0 < T
A
< 85°C 4.175 4.2 4.225 V
I
BAT
BAT Pin Current R
PROG
= 10k, Constant Current Mode ● 93 100 107 mA
R
PROG
= 1.25k, Constant Current Mode ● 760 800 840 mA
Standby Mode, Charge Terminated, V
BAT
= 4.2V ● –3.5 –7 µA
Shutdown Mode, V
BAT
= 4.2V ● ±1 ±5 µA
V
PROG
PROG Pin Voltage R
PROG
= 10k, Constant Current Mode 0.97 1 1.03 V
R
PROG
= 1.25k, Constant Current Mode 0.97 1 1.03 V
V
OUT
OUT Output Low Voltage I
OUT
= 5mA 0.10 0.25 V
I
OUT
= 5mA, V
CC
= 0V, V
BAT
= 2.55V 0.16 0.26 V
V
CHRG
CHRG Output Low Voltage I
CHRG
= 5mA 0.1 0.25 V
I
TRIKL
Trickle Charge Current V
BAT
< V
TRIKL
, R
PROG
= 10k 6 10 14 mA
V
BAT
< V
TRIKL
, R
PROG
= 1.25k 60 80 100 mA
V
TRIKL
Trickle Charge Threshold Voltage V
BAT
Rising 2.8 2.9 3 V
Hysteresis 100 mV
V
UV
V
CC
Undervoltage Lockout From Low to High 3.7 3.8 3.9 V
Voltage Hysteresis 200 V
V
ASD
V
CC
– V
BAT
Lockout Threshold V
CC
from Low to High, V
BAT
= 4.3V 145 190 230 mV
Voltage V
CC
from High to Low, V
BAT
= 4.3V 10 45 75 mV
R
EN
EN Pin Pull-Down Resistor ● 2 3.4 5 MΩ
TOP VIEW
10
9
6
7
811
4
5
3
2
1
V
CC
PROG
I
DET
EN
C/5
BAT
IN
+
TIMER
OUT
CHRG
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
T
JMAX
= 125°C, θ
JA
= 40°C/W (NOTE 3)
EXPOSED PAD IS GROUND (PIN 11)
MUST BE SOLDERED TO PCB
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ORDER PART NUMBER
DD PART MARKING
LTC4062EDD LBJT
LTC4062
3
4062fb
ELECTRICAL CHARACTERISTICS
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V, unless otherwise noted.
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC4062 is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: Failure to correctly solder the exposed pad of the package to the
PC board will result in a thermal resistance much higher than 40°C/W.
Note 4: Supply current includes PROG pin current and I
DET
pin current
(approximately 100µA each) but does not include any current delivered to
the battery through the BAT pin (approximately 100mA).
Note 5: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions.
Overtemperature protection will become active at a junction temperature
greater than the maximum operating temperature. Continuous operation
above the specified maximum operating junction temperature may impair
device reliability.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
EN
EN Input Threshold Voltage EN Rising, 4.3V < V
CC
< 8V 0.4 0.7 1 V
Hysteresis 70 mV
V
CT
Charge Termination Mode Threshold V
TIMER
from High to Low 0.4 0.7 1 V
Voltage Hysteresis 50 mV
V
UT
User Termination Mode Threshold V
TIMER
from Low to High 3.9 4.2 V
Voltage Hysteresis 50 mV
I
DETECT
Charge Current Detection Threshold R
DET
= 1k, 0 ≤ T
A
≤ 85°C 90 100 110 mA
R
DET
= 2k, 0 ≤ T
A
≤ 85°C455055mA
R
DET
= 10k, 0 ≤ T
A
≤ 85°C81012mA
R
DET
= 20k, 0 ≤ T
A
≤ 85°C 3.8 5 6.2 mA
∆V
RECHRG
Recharge Threshold Voltage V
FLOAT
–
V
RECHRG
, 0 ≤ T
A
≤ 85°C 65 100 135 mV
t
SS
Soft-Start Time I
BAT
from 0 to I
CHG
100 µs
t
TERM
Termination Comparator Filter Time Current Termination Mode 0.8 1.5 2.5 ms
t
RECHRG
Recharge Comparator Filter Time 3 7 14 ms
t
TIMER
Charge Cycle Time C
TIMER
= 0.1µF 2.55 3 3.45 hr
R
C/5
C/5 Pin Pull-Down Resistor ● 2 3.4 5 MΩ
V
C/5
C/5 Input Threshold Voltage C/5 Rising, 4.3V < V
CC
< 8V 0.4 0.7 1 V
Hysteresis 70 mV
T
LIM
Junction Temperature in Constant 105 °C
Temperature Mode
R
ON
Power FET “ON” Resistance V
BAT
= 3.85V, I
CC
= 175mA, R
PROG
= 2k 375 mΩ
(Between V
CC
and BAT)
Comparator
V
IN
+ IN
+
Pin Threshold Voltage V
IN
+
Falling ● 0.988 1 1.012 V
Hysteresis 50 mV
V
BAT-MIN
Minimum V
BAT
Supply Voltage for the V
CC
= 0V, V
BAT
Falling 2.4 2.5 2.6 V
Low Power Comparator Hysteresis 100 mV
I
BAT
Supply Current for the Low Power V
CC
= 0V, V
BAT
= 2.5V 7 9 13 µA
Comparator
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

LTC4062EDD#PBF

Mfr. #:
Buy LTC4062EDD#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Battery Management Standalone Linear Li-Ion Battery Charger w/ Thermistor Input
Lifecycle:
New from this manufacturer.
Delivery:
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