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LTC1731EMS8-4.1#TRPBF

Description
IC CTRLR BATT CHRGR LI-ION 8MSOP
CategoryPower/power management    The power supply circuit   
File Size169KB,12 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric View All

LTC1731EMS8-4.1#TRPBF Overview

IC CTRLR BATT CHRGR LI-ION 8MSOP

LTC1731EMS8-4.1#TRPBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
Parts packaging codeMSOP
package instructionTSSOP,
Contacts8
Manufacturer packaging codeMS8
Reach Compliance Codecompliant
ECCN codeEAR99
Adjustable thresholdNO
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeS-PDSO-G8
JESD-609 codee3
length3 mm
Number of channels1
Number of functions1
Number of terminals8
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeTSSOP
Package shapeSQUARE
Package formSMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Certification statusNot Qualified
Maximum seat height1.1 mm
Maximum supply voltage (Vsup)12 V
Minimum supply voltage (Vsup)4.5 V
Nominal supply voltage (Vsup)6 V
surface mountYES
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceMATTE TIN
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
width3 mm
Base Number Matches1
LTC1731-4.1/LTC1731-4.2
Single Cell Lithium-Ion Linear
Battery Charger Controllers
FEATURES
s
s
s
s
s
s
s
DESCRIPTIO
s
s
Complete Linear Charger Controller for
1-Cell Lithium-Ion Batteries
1% Voltage Accuracy
Programmable Charge Current
C/10 Charge Current Detection Output
Programmable Charge Termination Timer
Space Saving 8-Pin MSOP Package
Automatic Sleep Mode When Input Supply
is Removed (7µA Battery Drain)
Automatic Trickle Charging of Low Voltage Cells
Programmable for Constant-Current-Only Mode
The LTC
®
1731 is a complete constant-current/constant-
voltage linear charger controller for single cell lithium-ion
batteries. Nickel-cadmium (NiCd) and nickel-metal-hy-
dride (NiMH) batteries can also be charged with constant
current using external termination. The external sense
resistor sets the charge current with 5% accuracy. An
internal resistor divider and precision reference set the
final float potential with
±1%
accuracy. The output float
voltage is set internally to 4.1V (LTC1731-4.1) or 4.2V
(LTC1731-4.2).
When the input supply is removed, the LTC1731 automati-
cally enters a low current sleep mode, dropping the battery
drain current to typically 7µA. An internal comparator
detects the end-of-charge (C/10) condition while a pro-
grammable 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 2.457V.
The LTC1731 is available in the 8-pin MSOP and SO
packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
Cellular Phones
Handheld Computers
Charging Docks and Cradles
Programmable Current Source
TYPICAL APPLICATIO
500mA Li-Ion Battery Charger
V
IN
= 6V
MBRM120T3
7
1k
CHARGE
STATUS
V
CC
SENSE
2
CHRG
DRV
8
6
R
SENSE
0.2Ω
Q1
Si9430DY
I
BAT
= 500mA
LTC1731-4.2
3
C
TIMER
0.1µF
TIMER
BAT
PROG
GND
4
1
5
R
PROG
*
19.6k
+
Li-ION
CELL
*SHUTDOWN INVOKED BY FLOATING THE PROG PIN
U
1µF
10µF
1731 TA01
U
U
1
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