12
LTC1731-8.2/LTC1731-8.4
sn1731 17318fs
LT/TP 0602 2K • PRINTED IN USA
PART NUMBER DESCRIPTION COMMENTS
LT
®
1510-5 500kHz Constant-Voltage/Constant-Current Battery Charger Most Compact, Up to 1.5A, Charges NiCd, NiMH, Li-Ion Cells
LT1512 SEPIC Battery Charger V
IN
Can Be Higher or Lower Than Battery Voltage, 1.5A Switch
LT1571-1/-2/-5 200kHz/500kHz 1.5A Constant-Current/Constant-Voltage Charges 1- or 2-Cell Li-Ion Batteries, Preset and Adjustable
Battery Charger Battery Voltages, C/10 Charge Detection
LTC1615 SOT-23 Step-Up Switching Regulator 1.2V ≤ V
IN
≤ 15V; Up to 34 Output; I
Q
= 20µA
LT1620 Rail-to-Rail Current Sense Amplifier Precise Output Current Programming, Up to 32V V
OUT
LTC1682 Low Noise Doubler Charge Pump Output Noise = 60µV
RMS
; 2.5V to 5.5V Output
LTC1729 Termination Controller for Li-Ion Time or Charge Current Termination, Automatic Charger/Battery
Detection, Status Output, Preconditioning, 8-Lead MSOP
LTC1730 Complete Li-Ion Pulse Battery Charger with Internal FET Efficient 1.5A Charger with Many Features Including
and Thermal Regulation Overcurrent Battery Protection
LTC1731-4.1/-4.2 Complete Li-Ion Linear Battery Charger Controller Single Cell Li-Ion; C/10 Detection; Complete Charger
LTC1732 Complete Li-Ion Linear Battery Charger Controller No Firmware Required; AC Adapter Indicator
Automatic Charge and Recharge
LTC1733 Complete Li-Ion Linear Battery Charger with Internal FET 1.5A Charger with Many Features Including Thermal Feedback for
Increased Charge Current without Exceeding Maximum
Temperature
LTC1734 ThinSOT Li-Ion Charger Only Two External Components; V
PROG
Tracks I
CHARGE
No Diode Needed, No Sense Resistor Needed
LTC1754 ThinSOT Charge Pump I
OUT
= 50mA; 2V ≤ V
IN
≤ 4.4V; for Backlight White LED
LTC4050 Complete Li-Ion Charger with Thermistor Interface No Firmware required, AC Adapter Indicator
Automatic Charge and Recharge
RELATED PARTS
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear-tech.com
© LINEAR TECHNOLOGY CORPORATION 2000
Linear Charger Using a PNP Transistor
U
TYPICAL APPLICATIO
V
CC
V
IN
= 9V
SENSE
DRV
R2
2k
R
SENSE
0.25Ω
R1
10k
R
PROG
19.6k
2-CELL
Li-ION
LTC1731-8.4
BAT
CHRG
8
7
MBRM120T3
C2
10µF
C1
1nF
1731 TA02
C3
1µF
I
BAT
= 400mA
C
TIMER
*
0.1µF
Q1
2N5087
6
1
5
4
2
3
TIMER
PROG
GND
Q2
ZTX749
*AVX 0603ZC104KAT1A
+
CHARGE
STATUS
