LTC1731-4.1 Linear Technology, LTC1731-4.1 Datasheet - Page 8

• Manufacturer Part Number: LTC1731-4.1
• Description: Lithium-Ion Linear Battery Charger Controller
• Manufacturer: Linear Technology

LTC1731-4.1
TYPICAL APPLICATIONS
RELATED PARTS
8
PART NUMBER
LT
LT1512
LT1571
LT1620
LTC1729
LTC1731-4.2
®
1510-5
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone] www.linear-tech.com
DESCRIPTION
500kHz Constant-Voltage/Constant-Current Battery Charger
SEPIC Battery Charger
Battery Charger with Preset Voltage and Termination Flag
Rail-to-Rail Current Sense Amplifier
Termination Controller for Li-Ion
Li-Ion Linear Battery Charge Controller
AVX0603ZC104KATIA
C
R5
1k
TIMER
0.1 F
LED
U
R2
1k
C5
1 F
CER
C1
0.1 F
2
3
CHRG
TIMER
3
2
LTC1731-4.1
Linear Charger Using a PNP Transistor
CHRG
TIMER
GND
4
GND
LTC1731-4.1
V
1.5A Single-Cell Battery Charger
CC
4
7
SENSE
PROG
V
DRV
CC
BAT
7
PROG
SENSE
5
DRV
BAT
8
6
1
5
R4
18.2k
1%
8
6
1
R
19.6k
C1
1nF
PROG
C4
0.47 F
4.7
Q1
2N5087
R1
10k
R2
COMMENTS
Most Compact, Up to 1.5A, Charges NiCd, NiMH, Li-Ion Cells
V
Up to 1.5A; Preset Voltages: 4.1V, 4.2V, 8.2V, 8.4V
Precise Output Current Programming, Up to 32V V
Time or Charge Current Termination, Automatic Charger/Battery
Detection, Status Output, Preconditioning, 8-Lead MSOP
Fast Charge 4.2V Li-Ion Batteries with Constant-Voltage/Constant-
Current Linear Charger
5V TO 12V
3
IN
TPS2829DBVR
Can Be Higher or Lower Than Battery Voltage, 1.5A Switch
V
IN
+
Q2
ZTX749
R
0.2
I
SENSE
MBRM120T3
BAT
Li-ION
CELL
2
5
= 500mA
BATTERY
4
1-CELL
Li-Ion
1731 TA02
V
C3
1 F
C2
10 F
IN
= 5V ~ 6V
+
–
MBRS130LT3
Q2
Si2305DS
R3
0.082
1/4W
22 F
CDRH6D38-220NC
D2
MBRS130LT3
D1
© LINEAR TECHNOLOGY CORPORATION 2000
+
173141i LT/TP 0400 4K • PRINTED IN USA
1731 TA03
C3
100 F
C2
22 F
CER
OUT
, Up to 10A I
OUT