LTC1731-4.1 查看數據表（PDF） - Linear Technology
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LTC1731-4.1 Datasheet PDF : 12 Pages
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LTC1731-4.1/LTC1731-4.2
TYPICAL APPLICATIO S
Linear Charger Using a PNP Transistor
VIN = 6V
MBRM120T3
CTIMER
0.1µF
R2
1k
7
VCC
8
SENSE
2
CHRG
DRV 6
LTC1731-4.2
3
TIMER
1
BAT
5
PROG
GND
4
C1 R1
RSENSE
C3
1nF 10k 0.2Ω
1µF
Q2
ZTX749
Q1
2N5087
IBAT = 500mA
RPROG
19.6k
+ Li-ION
CELL
C2
10µF
1731 TA02
1.5A Single Cell Switching Battery Charger
C5
1µF
R5
CER
7
1k
VCC
8
SENSE
2
CHRG
DRV 6
LTC1731-4.2
3
C1*
0.1µF
TIMER
GND PROG
1
BAT
45
R4
18.2k
1%
C4
0.47µF
R2
4.7Ω
VIN
5V TO 6V
D2
MBRS130LT3
R3
0.082Ω
1/4W
C2
22µF
CER
Q2
D1
Si2305DS MBRS130LT3
LTC1693-5
22µH
CDRH6D38-220NC
+ Li-ION +
BATTERY
C3
100µF
1731 TA03
*AVX 0603ZC104KAT1A
RELATED PARTS
PART NUMBER
LT®1510-5
LT1512
LT1571-1/LT1571-2
LT1571-5
LT1620/LT1621
LTC1730
LTC1729
DESCRIPTION
500kHz Constant-Voltage/Constant-Current
Battery Charger
SEPIC Battery Charger
200kHz/500kHz Constant-Current/Constant-Voltage
Battery Charger Family
Rail-to-Rail Current Sense Amplifier
Integrated Pulse Charger for 1-Cell Li-Ion Battery
Termination Controller for Li-Ion
LTC1732
LTC1734
Constant-Current/Constant-Voltage Li-Ion Linear
Battery Charger
SOT-23 Li-Ion Battery Charger
COMMENTS
Most Compact, Up to 1.5A, Charges NiCd, NiMH, Li-Ion Cells
VIN Can Be Higher or Lower Than Battery Voltage, 1.5A Switch
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 VOUT
0.35Ω 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 µC 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
12 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408)432-1900 q FAX:(408)434-0507 q www.linear-tech.com
1731f LT/TP 0301 4K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1999
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