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LTC4056ETS8-4.2#TRMPBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
LTC4056-4.2
1
405642f
The LTC
®
4056 is a low cost, single-cell, constant-current/
constant-voltage Li-Ion battery charger controller with a
programmable termination timer. When combined with a
few external components, the LTC4056 forms a very small
standalone charger for single cell lithium-ion batteries.
Charge current and charge time are set externally with a
single resistor and capacitor, respectively. The LTC4056
charges to a final float voltage accurate to ±0.6%. Manual
shutdown is accomplished by grounding the TIMER/
SHDN pin, while removing input power automatically puts
the LTC4056 into a sleep mode. Both the shutdown and
sleep modes drain near zero current from the battery; the
shutdown mode reduces supply current to 40µA.
The output driver is both current limited and thermally
protected to prevent operating outside of safe limits. No
external blocking diode or sense resistor is required. The
LTC4056 also includes low battery charge conditioning
(trickle charging), undervoltage charge current limiting,
automatic recharge and a charge status output.
The LTC4056 is available in a low profile (1mm) 8-lead
SOT-23 (ThinSOT
TM
) package.
■
Cellular Telephones
■
Handheld Computers
■
Digital Cameras
■
Charging Docks and Cradles
■
Low Cost and Small Size Chargers
, LTC and LT are registered trademarks of Linear Technology Corporation.
■
Standalone Li-Ion Charger with Termination
■
Programmable Termination Timer
■
No Sense Resistor or Blocking Diode Required
■
Suitable for USB-Powered Charging
■
Undervoltage Charge Current Limiting
■
Preset Charge Voltage with ±0.6% Accuracy
■
Programmable Charge Current: 200mA to 700mA
■
Automatic Recharge with Shortened Charge Cycle
■
Self-Protection for Overcurrent/Overtemperature
■
40µA Supply Current in Shutdown Mode
■
Negligible Battery Drain Current in Shutdown
■
Low Battery Charge Conditioning (Trickle Charging)
■
CHRG Status Output including AC Present
■
PCB Total Solution Area only 75mm
2
(700mA)
■
Low Profile (1mm) SOT-23 Package
Linear Li-Ion Charger
with Termination in ThinSOT
V
CC
I
SENSE
CHRG
V
IN
4.5V TO 6.5V
CHARGE
STATUS
DRIVE
TIMER/SHDN BAT
PROG
GND
4056-4.2 TA01
1-CELL
4.2V Li-Ion
1µF
1µF
700mA
ZXT1M322
1.3k
LTC4056
+
ThinSOT is a trademark of Linear Technology Corporation.
V
IN
(V)
4.40
I
BAT
(mA)
4.70
4056 TA02
4.50 4.60
800
700
600
500
400
300
200
100
0
4.45 4.55 4.65 4.75
CONSTANT
CURRENT
UNDERVOLTAGE CHARGE
CURRENT LIMITING
UNDERVOLTAGE
LOCKOUT
AT 4.35V
V
BAT
= 4V
R
PROG
= 1.3k
I
CHG
= 700mA
INPUT Z = 100mΩ
V
IN
Undervoltage Charge
Current Limiting
DESCRIPTIO
U
FEATURES
APPLICATIO S
U
TYPICAL APPLICATIO
U
LTC4056-4.2
2
405642f
ORDER PART
NUMBER
TS8 PART
MARKING
T
JMAX
= 125°C, θ
JA
= 120°C/W TO 200°C/W
DEPENDING ON PC BOARD LAYOUT
Consult LTC Marketing for parts specified with wider operating temperature ranges.
LTG5
LTC4056ETS8-4.2
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
(Note 1)
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V.
Input Supply Voltage (V
CC
) ........................–0.3V to 10V
BAT, CHRG ................................................–0.3V to 10V
DRIVE, PROG, TIMER/SHDN ....... –0.3V to (V
CC
+ 0.3V)
Output Current (I
SENSE
) ...................................... 900mA
Short-Circuit Duration (BAT, I
SENSE
) ............Continuous
Junction Temperature........................................... 125°C
Operating Ambient Temperature Range
(Note 2) .............................................. –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
1
2
3
4
V
CC
I
SENSE
DRIVE
GND
8
7
6
5
CHRG
BAT
PROG
TOP VIEW
TS8 PACKAGE
8-LEAD PLASTIC SOT-23
TIMER/
SHDN
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Supply
V
CC
Input Supply Voltage (Note 3) ● 4.5 6.5 V
I
CC
Quiescent V
CC
Supply Current V
BAT
= 4.5V (Forces I
DRIVE
= 0)
I
PROG
= 200µA (R
PROG
= 5k) ● 400 600 µA
I
SHDN
V
CC
Supply Current in Manual Shutdown V
TIMER/SHDN
= 0V 40 60 µA
I
BMS
Battery Drain Current in V
TIMER/SHDN
= 0V ● –1 0 1 µA
Manual Shutdown (Note 4)
I
BSL
Battery Drain Current in V
CC
= 0V ● –1 0 1 µA
Sleep Mode (Note 5)
V
UVLOI
Undervoltage Rising Threshold V
CC
Increasing ● 4.325 4.40 4.475 V
V
UVLOD
Undervoltage Falling Threshold V
CC
Decreasing ● 4.275 4.35 4.425 V
V
UVHYS
Undervoltage Hysteresis V
UVLOI
-V
UVLOD
50 mV
V
UVCL
Undervoltage Charge Current Limit Threshold 4.575 V
V
UVCL
-V
UVLOI
UV Charge Current to UVLO Threshold Margin ● 90 170 250 mV
Charging Performance
V
FLOAT
Output Float Voltage in I
BAT
= 10mA 4.175 4.200 4.225 V
Constant Voltage Mode I
BAT
= 10mA, 4.75V ≤ V
CC
≤ 6.5V ● 4.158 4.200 4.242 V
I
BAT
Output Full-Scale Current in R
PROG
= 5k, 4.75V ≤ V
CC
≤ 6.5V, 137 183 228 mA
Constant Current Mode PNP Beta > 50, 0°C ≤ T
A
≤ 85°C
R
PROG
= 1.43k, 4.75V ≤ V
CC
≤ 6.5V, 590 640 690 mA
PNP Beta > 50, 0°C ≤ T
A
≤ 85°C
I
DSINK
Drive Output Current V
DRIVE
= 3V ● 30 mA
I
TRIKL
Trickle Charge Current V
BAT
= 2V, R
PROG
= 5k 5 7 10 mA
V
BAT
= 2V, R
PROG
= 1.43k 12 20 28 mA
V
TRIKL
Trickle Charge Threshold Voltage V
BAT
Falling ● 2.73 2.80 2.87 V
∆V
TRIKL
Trickle Charge Hysteresis Voltage 45 70 95 mV
V
PROG1
PROG Pin Voltage R
PROG
= 5k (I
PROG
= 200µA) ● 0.98 1 1.02 V
V
PROG2
PROG Pin Voltage R
PROG
= 1.43k (I
PROG
= 700µA) ● 0.98 1 1.02 V
LTC4056-4.2
3
405642f
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 5V.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
∆V
RECHRG
Recharge Threshold Voltage V
FLOAT
– V
RECHRG
, V
BAT
> V
TRIKL
, 100 150 200 mV
Charge Termination Timer Expired
T
TIMER
TIMER/SHDN Accuracy C
TIMER
= 1µF R
PROG
= 1.43k ● 10 12 %
Charger Manual Control
V
MSDT
Manual Shutdown Threshold Voltage V
TIMER/SHDN
Increasing ● 0.6 0.82 1 V
V
MSHYS
Manual Shutdown Hysteresis Voltage V
TIMER/SHDN
Decreasing 50 75 125 mV
I
SHDN
TIMER/SHDN Pin Pull-up Current V
TIMER/SHDN
= 0V –10 –7 –4 µA
Protection
I
DSHRT
Drive Output Short-Circuit Current Limit V
DRIVE
= V
CC
● 30 65 130 mA
I
PSHRT
PROG Pin Short-Circuit Current Limit V
PROG
= 0V 1.4 mA
Status Output
I
CHRG
CHRG Pin Weak Pull-Down Current V
CHRG
= 1V, V
TIMER/SHDN
= 0V 6 12 18 µA
V
CHRG
CHRG Output Low Voltage I
CHRG
= 10mA ● 0.2 0.4 V
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC4056E is guaranteed to meet performance specifications
from 0°C to 70°C ambient temperature range. Specifications over the
–40°C to 85°C operating ambient temperature range are assured by
design, characterization and correlation with statistical process controls.
Note 3: Although the LTC4056 will operate with input voltages as low as
4.5V, charging will not begin until V
CC
exceeds V
UVCL
.
Note 4: Assumes that the external PNP pass transistor has negligible B-C
reverse-leakage current when the collector is biased at 4.2V (V
BAT
) and the
base is biased at 5V (V
CC
).
Note 5: Assumes that the external PNP pass transistor has negligible B-E
reverse-leakage current when the emitter is biased at 0V (V
CC
) and the
base is biased at 4.2V (V
BAT
).
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Float Voltage vs Temperature and
Supply Voltage
TEMPERATURE (°C)
–50
V
FLOAT
(V)
4.205
4.210
4.215
25 75
4056-4.2 G01
4.200
4.195
–25 0
50 100 125
4.190
4.185
I
BAT
= 10mA
PNP = FZT749
V
CC
= 6.5V
V
CC
= 4.75V
I
BAT
(mA)
0
FLOAT VOLTAGE (V)
300
4056-4.2 G02
4.200
4.199
100 200 400
4.198
4.202
4.201
500 600 700
V
CC
= 5V
T
A
= 25°C
PNP = FZT749
R
PROG
= 1.30k
TEMPERATURE (°C)
–50
I
BAT
(mA)
215
25
4056-4.2 G03
200
190
–25 0 50
185
180
220
210
205
195
75 100 125
R
PROG
= 4.53k
PNP = FZT749
V
CC
= 6.5V
V
CC
= 4.75V
Float Voltage vs I
BAT
I
BAT
vs Temperature and
Supply Voltage
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LTC4056ETS8-4.2#TRMPBF

Mfr. #:
Buy LTC4056ETS8-4.2#TRMPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Battery Management Monolithic Li-Ion Charger Controller w/Ilim
Lifecycle:
New from this manufacturer.
Delivery:
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