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Linear Technology Electronic Components Datasheet

LTC4062EDD Datasheet

Standalone Linear Li-Ion Battery Charger

No Preview Available !

FEATURES
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
SmartStartTM Prolongs Battery Life
20µA Charger Quiescent Current in Shutdown
Available in a Low Profile (0.75mm) 10-Lead
(3mm × 3mm) DFN Package
U
APPLICATIO S
Handheld Computers
Portable MP3 Players
Digital Cameras
, 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
Standalone Linear Li-Ion
Battery Charger with
Micropower Comparator
DESCRIPTIO
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.
TYPICAL APPLICATIO
800mA Single-Cell Li-Ion Battery Charger
(C/10 Termination)
VIN
4.3V TO 8V
VCC
OUT
LTC4062
EN
C/5
TIMER
BAT
1µF
PROG
IDET
IN+
619
GND
BAT > 3V BAT < 3V
100k
800mA
715k
+ SINGLE-CELL
347k
Li-Ion BATTERY
4062 TA01
Complete Charge Cycle (1100mAh Battery)
900
4.3
800
4.2
700
4.1
600
4.0
500
3.9
400
BATTERY
VOLTAGE
BATTERY
CURRENT
3.8
300
3.7
200
100 VCC = 5V
TA = 25°C
0
0 0.5 1.0 1.5 2.0
TIME (HOURS)
3.6
3.5
3.4
2.5 3.0
4062 TA01b
4062fb
1


Linear Technology Electronic Components Datasheet

LTC4062EDD Datasheet

Standalone Linear Li-Ion Battery Charger

No Preview Available !

LTC4062
ABSOLUTE AXI U RATI GS
(Note 1)
Input Supply Voltage (VCC) ........................ –0.3V to 10V
EN, OUT, CHRG, IN+, PROG, C/5, BAT ....... –0.3V to 10V
TIMER, IDET ..................................... –0.3V to VCC +0.3V
BAT Short-Circuit Duration ...........................Continuous
VCC 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
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
BAT 1
IN+ 2
TIMER 3
OUT 4
CHRG 5
10 VCC
9 PROG
11
8 IDET
7 EN
6 C/5
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 40°C/W (NOTE 3)
EXPOSED PAD IS GROUND (PIN 11)
MUST BE SOLDERED TO PCB
ORDER PART NUMBER DD PART MARKING
LTC4062EDD
LBJT
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.
ELECTRICAL CHARACTERISTICS The denotes specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, unless otherwise noted.
SYMBOL
VCC
ICC
VFLOAT
IBAT
VPROG
VOUT
VCHRG
ITRIKL
VTRIKL
VUV
VASD
REN
PARAMETER
Input Supply Voltage
Input Supply Current
VBAT Regulated Output Voltage
BAT Pin Current
PROG Pin Voltage
OUT Output Low Voltage
CHRG Output Low Voltage
Trickle Charge Current
Trickle Charge Threshold Voltage
VCC Undervoltage Lockout
Voltage
VCC – VBAT Lockout Threshold
Voltage
EN Pin Pull-Down Resistor
CONDITIONS
MIN TYP
4.3
Charge Mode (Note 4), RPROG = 10k
240
Standby Mode, Charge Terminated
130
Shutdown (EN = 5V, VCC < VBAT or VCC < VUV)
20
0 < TA < 85°C
4.185 4.2
4.175 4.2
RPROG = 10k, Constant Current Mode
93
100
RPROG = 1.25k, Constant Current Mode
760
800
Standby Mode, Charge Terminated, VBAT = 4.2V
–3.5
Shutdown Mode, VBAT = 4.2V
±1
RPROG = 10k, Constant Current Mode
RPROG = 1.25k, Constant Current Mode
0.97
1
0.97
1
IOUT = 5mA
0.10
IOUT = 5mA, VCC = 0V, VBAT = 2.55V
0.16
ICHRG = 5mA
0.1
VBAT < VTRIKL, RPROG = 10k
VBAT < VTRIKL, RPROG = 1.25k
6
10
60
80
VBAT Rising
Hysteresis
2.8
2.9
100
From Low to High
Hysteresis
3.7
3.8
200
VCC from Low to High, VBAT = 4.3V
VCC from High to Low, VBAT = 4.3V
145
190
10
45
2
3.4
MAX
8
500
300
50
4.215
4.225
107
840
–7
±5
1.03
1.03
0.25
0.26
0.25
14
100
3
3.9
230
75
5
UNITS
V
µA
µA
µA
V
V
mA
mA
µA
µA
V
V
V
V
V
mA
mA
V
mV
V
V
mV
mV
M
4062fb
2


Part Number LTC4062EDD
Description Standalone Linear Li-Ion Battery Charger
Maker Linear
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