LTC1731-84 Просмотр технического описания (PDF) - Linear Technology
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LTC1731-84 Datasheet PDF : 12 Pages
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LTC1731-8.2/LTC1731-8.4
TYPICAL APPLICATIO
Linear Charger Using a PNP Transistor
VIN = 9V
MBRM120T3
CHARGE
STATUS
CTIMER*
0.1µF
R2
2k
7
VCC
8
SENSE
2
CHRG
DRV 6
LTC1731-8.4
3
TIMER
1
BAT
5
PROG
GND
4
C1 R1
RSENSE
C3
1nF 10k 0.25Ω
1µF
Q2
ZTX749
Q1
2N5087
IBAT = 400mA
RPROG
19.6k
+
2-CELL
C2
Li-ION
10µF
*AVX 0603ZC104KAT1A
1731 TA02
RELATED PARTS
PART NUMBER
LT®1510-5
LT1512
LT1571-1/-2/-5
LTC1615
LT1620
LTC1682
LTC1729
DESCRIPTION
500kHz Constant-Voltage/Constant-Current Battery Charger
SEPIC Battery Charger
200kHz/500kHz 1.5A Constant-Current/Constant-Voltage
Battery Charger
SOT-23 Step-Up Switching Regulator
Rail-to-Rail Current Sense Amplifier
Low Noise Doubler Charge Pump
Termination Controller for Li-Ion
LTC1730
LTC1731-4.1/-4.2
LTC1732
Complete Li-Ion Pulse Battery Charger with Internal FET
and Thermal Regulation
Complete Li-Ion Linear Battery Charger Controller
Complete Li-Ion Linear Battery Charger Controller
LTC1733
Complete Li-Ion Linear Battery Charger with Internal FET
LTC1734
LTC1754
LTC4050
ThinSOT Li-Ion Charger
ThinSOT Charge Pump
Complete Li-Ion Charger with Thermistor Interface
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
Charges 1- or 2-Cell Li-Ion Batteries, Preset and Adjustable
Battery Voltages, C/10 Charge Detection
1.2V ≤ VIN ≤ 15V; Up to 34 Output; IQ = 20µA
Precise Output Current Programming, Up to 32V VOUT
Output Noise = 60µVRMS; 2.5V to 5.5V Output
Time or Charge Current Termination, Automatic Charger/Battery
Detection, Status Output, Preconditioning, 8-Lead MSOP
Efficient 1.5A Charger with Many Features Including
Overcurrent Battery Protection
Single Cell Li-Ion; C/10 Detection; Complete Charger
No Firmware Required; AC Adapter Indicator
Automatic Charge and Recharge
1.5A Charger with Many Features Including Thermal Feedback for
Increased Charge Current without Exceeding Maximum
Temperature
Only Two External Components; VPROG Tracks ICHARGE
No Diode Needed, No Sense Resistor Needed
IOUT = 50mA; 2V ≤ VIN ≤ 4.4V; for Backlight White LED
No Firmware required, AC Adapter Indicator
Automatic Charge and Recharge
12 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408)432-1900 q FAX:(408)434-0507 q www.linear-tech.com
sn1731 17318fs
LT/TP 0602 2K • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 2000
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