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LTC4050EMS-4.2#TRPBF

P1-P3P4-P6P7-P9P10-P12
1
LTC4050
4050f
Lithium-Ion Linear Battery
Charger with Thermistor Interface
The LTC
®
4050-4.1/LTC4050-4.2 are complete standalone
constant-current/constant-voltage linear charge control-
lers for lithium-ion (Li-Ion) batteries. Charge current is
programmable and final float voltage has ±1% accuracy.
When the input supply is removed, the LTC4050 automati-
cally enters a low quiescent current sleep mode, dropping
the battery drain current to 5µA. An internal comparator
detects the near-end-of-charge (C/10) condition while a
programmable timer, using an external capacitor, sets the
total charge time. Fully discharged cells are automatically
trickle charged at 10% of the programmed current until
cell voltage exceeds 2.49V. The thermistor interface
suspends charging if the cell temperature is outside of a
0°C to 50°C temperature window.
The LTC4050 begins a new charge cycle when a discharged
battery is connected to the charger or when the input power
is applied. In addition, a new charge cycle is automatically
started if the battery remains connected to the charger and
the cell voltage drops below 3.88V for 4.1V cells or below
3.98V for 4.2V cells.
The LTC4050 is available in the 10-pin MSOP package.
■
Complete Standalone Linear Charger Controller
for 1-Cell Lithium-Ion Batteries
■
Thermistor Interface for Battery Temperature
Sensing
■
Preset Charge Voltage with ±1% Accuracy
■
Programmable Charge Current
■
C/10 Charge Current Detection Output
■
Programmable Charge Termination Timer
■
Input Supply (Wall Adapter) Detection Output
■
4.5V to 10V Input Voltage Range
■
Automatic Sleep Mode When Input Supply
is Removed (Only 5µA Battery Drain)
■
Automatic Trickle Charging of Low Voltage Cells
■
Automatic Battery Recharge
■
Battery Insertion Detection
■
Space Saving 10-Pin MSOP Package
■
Cellular Phones
■
Handheld Computers
■
Charging Docks and Cradles
APPLICATIO S
U
TYPICAL APPLICATIO
U
Single Cell 4.2V 500mA Li-Ion Battery Charger
FEATURES
DESCRIPTIO
U
V
CC
V
IN
6V
SENSE
DRV
1k
1k
0.2Ω
19.6k
4.2V
Li-Ion
CELL
LTC4050-4.2
*SHUTDOWN INVOKED BY FLOATING THE PROG PIN
BAT
CHRG
9
MBRM120T3
10µF
4050 TA01
1µF
I
BAT
= 500mA
0.1µF
Si9430DY
7
1
6
*
8
52
+
3
10
4
ACPR
TIMER
PROG
NTCGND
10k NTC
DALE NTHS-1206N02
T
, LTC and LT are registered trademarks of Linear Technology Corporation.
Charge Current vs
Thermistor Temperature
THERMISTOR TEMPERATURE (°C)
–50
CHARGE CURRENT (mA)
400
500
600
25 75
4050 TA05
300
200
–25 0
50 100 125
100
0
V
BAT
= 3.7V
2
LTC4050
4050f
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Input Supply Voltage ● 4.5 10 V
I
CC
Input Supply Current Charger On, Current Mode ● 1.3 3 mA
Shutdown Mode
● 1.3 3 mA
Sleep Mode (Battery Drain Current) 5 15 µA
V
BAT
Regulated Output (Float) Voltage in LTC4050-4.1; 5V ≤ V
CC
≤ 10V, 0°C ≤ T
A
≤ 85°C 4.059 4.1 4.141 V
Constant Voltage Mode LTC4050-4.2; 5V ≤ V
CC
≤ 10V, 0°C ≤ T
A
≤ 85°C 4.158 4.2 4.242 V
LTC4050-4.1; 5V ≤ V
CC
≤ 10V ● 4.039 4.1 4.141 V
LTC4050-4.2; 5V ≤ V
CC
≤ 10V ● 4.137 4.2 4.242 V
I
BAT
Current Mode Charge Current R
PROG
= 19.6k, R
SENSE
= 0.2Ω 440 500 535 mA
R
PROG
= 19.6k, R
SENSE
= 0.2Ω ● 415 585 mA
R
PROG
= 97.6k, R
SENSE
= 0.2Ω 60 100 140 mA
I
TRIKL
Trickle Charge Current V
BAT
= 2V, R
PROG
= 19.6k, I
TRIKL
= (V
CC
– V
SENSE
)/0.2Ω ● 20 55 90 mA
V
TRIKL
Trickle Charge Threshold Voltage ● 2.41 2.49 2.58 V
V
UV
V
CC
Undervoltage Lockout Voltage ● 44.5 V
∆V
UV
V
CC
Undervoltage Lockout Hysteresis 130 mV
V
MSD
PROG Pin Manual Shutdown 3.6 V
Threshold Voltage
V
ASD
Automatic Shutdown Threshold Voltage (V
CC
– V
BAT
) High to Low 25 54 85 mV
(V
CC
– V
BAT
) Low to High 40 69 100 mV
I
PROG
PROG Pin Current Internal Pull-Up Current, No R
PROG
2.3 µA
PROG Pin Source Current, ∆V
PROG
≤ 5mV ● 300 µA
V
PROG
PROG Pin Voltage R
PROG
=19.6k 2.47 V
V
ACPR
ACPR Pin Output Low Voltage I
ACPR
= 5mA 0.525 V
I
CHRG
CHRG Pin Weak Pull-Down Current V
CHRG
= 1V 32 µA
V
CHRG
CHRG Pin Output Low Voltage I
CHRG
= 5mA 0.525 V
R
HOT
Thermistor Resistance for Hot Fault 3.7 4.1 4.4 kΩ
R
COLD
Thermistor Resistance for Cold Fault 25 28.5 31 kΩ
ORDER PART
NUMBER
(Note 1)
Input Supply Voltage (V
CC
) ...................................... 12V
SENSE, DRV, BAT, SEL,
TIMER, PROG, CHRG, ACPR .................–0.3V to 12V
Operating Temperature Range (Note 2) . –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
LTC4050EMS-4.1
LTC4050EMS-4.2
T
JMAX
= 140°C, θ
JA
= 180°C/W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ABSOLUTE MAXIMUM RATINGS
W
WW
U
PACKAGE/ORDER INFORMATION
W
U
U
MS PART MARKING
LTTW
LTTX
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 6V unless otherwise noted.
ELECTRICAL CHARACTERISTICS
1
2
3
4
5
BAT
NTC
CHRG
TIMER
GND
10
9
8
7
6
ACPR
SENSE
V
CC
DRV
PROG
TOP VIEW
MS PACKAGE
10-LEAD PLASTIC MSOP
3
LTC4050
TYPICAL PERFOR A CE CHARACTERISTICS
UW
TEMPERATURE (°C)
–50
460
I
BAT
(mA)
480
500
520
540
–25 0 25 50
LTC4050 G01
75 100 125
R
PROG
= 19.6k
R
SEN
= 0.2Ω
V
BAT
= 3V
V
CC
= 6V
V
CC
(V)
4
I
BAT
(mA)
500
505
510
LC4050 G02
495
490
480
6
810
485
520
515
R
PROG
= 19.6k
R
SEN
= 0.2Ω
V
BAT
= 3V
T
A
= 25°C
TEMPERATURE (°C)
–50
I
TRKL
(mA)
60
65
70
25 75
LTC4050 G03
55
50
–25 0
50 100 125
45
40
R
PROG
= 19.6k
R
SEN
= 0.2Ω
V
BAT
= 2V
V
CC
= 6V
V
CC
(V)
4
40
I
TRKL
(mA)
45
50
55
60
65
70
6810
LTC4050 G04
R
PROG
= 19.6k
R
SEN
= 0.2Ω
V
BAT
= 2V
T
A
= 25°C
TEMPERATURE (°C)
–50 –25
2.46
V
TRKL
(V)
2.48
2.51
0
50
75
LTC4050 G05
2.47
2.50
2.49
25
100
125
V
CC
= 6V
R
PROG
= 19.6k
V
CC
(V)
4
2.45
V
TRKL
(V)
2.47
2.48
2.49
2.50
2.51
2.52
6
8
LTC4050 G06
2.53
2.54
2.55
2.46
10
R
PROG
= 19.6k
T
A
= 25°C
Charge Current vs Temperature
Charge Current vs V
CC
Trickle Charge Current
vs Temperature
Trickle Charge Current vs V
CC
Trickle Charge Threshold Voltage
vs Temperature
Trickle Charge Threshold Voltage
vs V
CC
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
C/10
10% Charge Current Indication Level R
PROG
= 19.6k, R
SENSE
= 0.2Ω ● 25 50 100 mA
t
TIMER
TIMER Accuracy C
TIMER
= 0.1µF10%
V
RECHRG
Recharge Threshold Voltage V
BAT
from High to Low (LTC4050-4.1) 3.83 3.88 V
V
BAT
from High to Low (LTC4050-4.2) 3.93 3.98 V
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC4050E 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.
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 6V unless otherwise noted.
ELECTRICAL CHARACTERISTICS
P1-P3P4-P6P7-P9P10-P12

LTC4050EMS-4.2#TRPBF

Mfr. #:
Buy LTC4050EMS-4.2#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Battery Management Li-Ion Battery Charger w/ Thermistor Interface
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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