ltc1731ems8-8.4-trpbf Linear Technology Corporation, ltc1731ems8-8.4-trpbf Datasheet - Page 12

• Manufacturer Part Number: ltc1731ems8-8.4-trpbf
• Description: Ltc1731-4.2 - Single Cell Lithium-ion Linear Battery Charger Controllers
• Manufacturer: Linear Technology Corporation

RELATED PARTS
LTC1731-4.1/LTC1731-4.2
PART NUMBER
LT
LT1512
LT1571-1/LT1571-2
LT1571-5
LT1620/LT1621
LTC1730
LTC1729
LTC1732
LTC1734
12
C
TYPICAL APPLICATIO S
TIMER
0.1 F
®
1510-5
R2
1k
Linear Charger Using a PNP Transistor
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone] www.linear-tech.com
2
3
CHRG
TIMER
LTC1731-4.2
GND
V
CC
Rail-to-Rail Current Sense Amplifier
DESCRIPTION
500kHz Constant-Voltage/Constant-Current
Battery Charger
SEPIC Battery Charger
200kHz/500kHz Constant-Current/Constant-Voltage
Battery Charger Family
Integrated Pulse Charger for 1-Cell Li-Ion Battery
Termination Controller for Li-Ion
Constant-Current/Constant-Voltage Li-Ion Linear
Battery Charger
SOT-23 Li-Ion Battery Charger
4
7
SENSE
PROG
DRV
BAT
8
6
1
5
R
19.6k
PROG
C1
1nF
Q1
2N5087
R1
10k
U
V
IN
= 6V
+
Q2
ZTX749
R
0.2
I
SENSE
MBRM120T3
BAT
Li-ION
CELL
= 500mA
1731 TA02
C3
1 F
C2
10 F
*AVX 0603ZC104KAT1A
R5
1k
C1*
0.1 F
COMMENTS
Most Compact, Up to 1.5A, Charges NiCd, NiMH, Li-Ion Cells
V
Up to 1.5A Charge Current for 1- or 2-Cell Li-Ion Batteries, Preset and
Adjustable Battery Voltages, C/10 Charge Detection
Precise Output Current Programming, Up to 32V V
0.35 Internal N-FET Requires No Blocking Diode
Time or Charge Current Termination, Automatic Charger/Battery
Detection, Status Output, Preconditioning, 8-Lead MSOP
Stand Alone Battery, No C or Firmware Required, Auto Recharge of
Low Battery, 10-Pin MSOP, Input Supply Detection
Needs Only Two External Components, Monitors Charge Current, No
Reverse Diode or Sense Resistor Required
IN
2
3
Can Be Higher or Lower Than Battery Voltage, 1.5A Switch
CHRG
TIMER
GND PROG
LTC1731-4.2
4
1.5A Single Cell Switching Battery Charger
V
CC
7
5
R4
18.2k
1%
SENSE
DRV
BAT
C5
1 F
CER
8
6
1
4.7
C4
0.47 F
R2
LINEAR TECHNOLOGY CORPORATION 1999
LTC1693-5
1731f LT/TP 0301 4K • PRINTED IN USA
5V TO 6V
V
IN
+
OUT
Q2
Si2305DS
R3
0.082
1/4W
22 H
CDRH6D38-220NC
Li-ION
BATTERY
D2
MBRS130LT3
MBRS130LT3
C2
22 F
CER
+
D1
1731 TA03
C3
100 F