LTC4121/LTC4121-4.2
30
4121fc
For more information www.linear.com/LTC4121
LINEAR TECHNOLOGY CORPORATION 2014
LT 0216 REV C • PRINTED IN USA
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com/LTC4121
RELATED PARTS
TYPICAL APPLICATION
Figure 14. Design Example 1 with LTC4121-4.2
INTV
CC
BOOST
SW
CHGSNS
BAT
BATSNS
NTC
IN
RUN
MPPT
LTC4121-4.2
CHRG FAULT
GND
470k
470k
R
RUN1
464k
C
IN
10µF
+
R
RUN2
107k
10k
R
MPPT1
698k
R
MPPT1
100k
C
INTVCC
2.2µF
+
+
C
BST
22nF
L
SW
47µH
FREQPROG
4121 TA02
V
OC
= 21.6V, V
MP
= 17V
INTV
CC
C
BAT
22µF
V
FLOAT
= 4.2V
T
+
Li-Ion
T = NTHS0805N02N1002F
R
PROG
3.01k
PART NUMBER DESCRIPTION COMMENTS
LT3650-4.1/
LT3650-4.2
Monolithic 2A Switch Mode
Non-Synchronous 1-Cell Li-Ion Battery
Charger
Standalone 4.75V < V
IN
< 32V (40V Absolute Maximum), 1MHz, 2A Programmable Charge
Current, Timer or C/10 Termination, Small and Few External Components 3mm × 3mm DFN-12
Package “-4.1” for 4.1V Float Voltage Batteries, “-4.2” for 4.2V Float Voltage Batteries.
LT3652HV Power Tracking 2A Battery Charger Input Supply Voltage Regulation Loop for Peak Power Tracking in (MPPT) Solar Applications,
4.95V < V
IN
< 34V (40V Absolute Maximum), 1MHz, 2A Charge Current, 3.3V < V
OUT
< 18V.
Timer or C/10 Termination,
3mm × 3mm DFN-12 Package and MSOP-12 Packages.
LTC4070 Li-Ion/Polymer Shunt Battery Charger Low 450nA Operating Current, 50mA Internal Shunt Current (500mA with External PFET)
LTC4071 Li-Ion/Polymer Shunt Battery Charger
System with Low Battery Disconnect
Integrated Pack Protection, < 10nA Low Battery Disconnect Protects Battery from
Over-Discharge. Low Operating Current (550nA), 1% Float Voltage Accuracy Over Full
Temperature and Shunt Current Range, 50mA Maximum Internal Shunt Current, Pin Selectable
Float Voltages: 4.0V, 4.1V, 4.2V. Ultralow Power Pulsed NTC Float Conditioning for Li-Ion/
Polymer Protection, 8-Lead (2mm × 3mm) DFN and MSOP.
LTC4065/
LTC4065A
Standalone Li-Ion Battery Charger in
2mm × 2mm DFN
4.2V ±0.6% Float Voltage, Up to 750mA Charge Current; “A” Version Has /ACPR Function.
2mm × 2mm DFN Package.
LT
C4079 60V 250mA Multi-Chemistry Linear
Battery Charger
2.7V – 60V Input Voltage range, 1.2V – 60V Adjustable Battery Voltage Range and 10mA
– 250mA Charge Current Range. Low 4µA Quiescent Current. Input Voltage and Thermal
Regulation. 10-pin 3mm x 3mm DFN package.
LTC4015 Multi-Chemistry Buck Battery Charger
Controller with Digital Telemetry System
Multi-Chemistry Li-Ion/Polymer, LiFePO
4
, or Lead-Acid Battery Charger with Termination, Digital
Telemetry System Monitors V
BAT
, I
BAT
, R
BAT
,NTC Ratio (Battery Temperature), V
IN
, I
IN
, V
SYSTEM
,
Die Temperature, Coulomb Counter and Integrated 14-Bit ADC, Wide Charging Input Voltage
Range: 4.5V to 35V, Wide Battery Voltage Range: Up to 35V, 5mm × 7mm QFN-38 Package
LTC4020 55V Buck-Boost Multi-Chemistry Battery
Charger
Wide Voltage Range: 4.5V to 55V Input, Up to 55V Output (60V Absolute Maximums
),
Synchronous Buck-Boost DC/DC Controller, Li-Ion and Lead-Acid Charge Algorithms, Input
Voltage Regulation for High Impedance Input Supplies and Solar Panel Peak Power Operation,
Low Profile (0.75mm) 38-Pin 5mm × 7mm QFN Package
LTC4001 2A Synchronous Buck Li-Ion Charger Low Power Dissipation, 2A Maximum Charge Current, No External MOSFETs, Sense Resistor
or Blocking Diode Required, Programmable Charge Termination Timer, Preset 4.2V Float
Voltage with ±0.5% Accuracy, Low Profile 16-Lead (4mm × 4mm) QFN Package
