LM3622MX-4.2 ,Lithium-Ion Battery Charger ControllerGeneral Descriptionwhen the cell voltage drops below a preset limit. The LVSELThe LM3622 is a charg ..
LM3622MX-4.2 ,Lithium-Ion Battery Charger ControllerGeneral Descriptionwhen the cell voltage drops below a preset limit. The LVSELThe LM3622 is a charg ..
LM3622MX-8.2 ,Lithium-Ion Battery Charger ControllerLM3622 Lithium-Ion Battery Charger ControllerFebruary 2000LM3622Lithium-Ion Battery Charger Control ..
LM3622MX-8.4 ,Lithium-Ion Battery Charger ControllerApplicationsresistor. The internal bandgap insures excellent controllern Cellular phone cradle char ..
LM3642TLX/NOPB ,1.5A Synchronous Boost LED Flash Driver w/ High-Side Current 9-DSBGA Features include a hardware flash enable– 24 mA to 187 mA (LT option)(STROBE) allowing a logic inpu ..
LM3658SD ,Dual Source USB/AC Li Chemistry Charger IC for Portable ApplicationsLM3658 Dual Source USB/AC Li Chemistry Charger IC for Portable
LMV344MAX/NOPB ,Single w/ Shutdown/Dual/Quad Gen Purpose, 2.7V,Rail-to-Rail Output, 125C, Op Amps 14-SOIC -40 to 125Features 3 DescriptionThe LMV34x-N devices are single, dual, and quad1• Typical 2.7 V Supply Values ..
LMV344MT ,Single with Shutdown/Dual/Quad General Purpose, 2.7V,Rail-to-Rail Output, 125°C, Operational AmplifiersElectrical Characteristics (Note 10)+ − + +>Unless otherwise specified, all limits guaranteed for T ..
LMV344MTX ,Single with Shutdown/Dual/Quad General Purpose, 2.7V,Rail-to-Rail Output, 125°C, Operational AmplifiersElectrical Characteristics (Note 10)+ − + +Unless otherwise specified, all limits guaranteed for T ..
LMV344MTX/NOPB ,Single w/ Shutdown/Dual/Quad Gen Purpose, 2.7V,Rail-to-Rail Output, 125C, Op Amps 14-TSSOP -40 to 125 SNOS990H–APRIL 2002–REVISED JUNE 20165 Pin Configuration and FunctionsDCK Package6-Pin SC70Top Vie ..
LMV358 ,General, Purpose, Low Voltage, Rail-to-Rail Dual Output Operational AmplifiersLMV321, LMV358, LMV324General Purpose, Low Voltage, Rail-to-Rail Output Amplifiers
LMV358AM8X ,Dual, General Purpose, Low Cost, RRO AmplifierLMV321, LMV358, LMV324General Purpose, Low Voltage, Rail-to-Rail Output Amplifiers
LM3622AM-4.1-LM3622AM-4.1.-LM3622AM-4.2-LM3622AM-8.2-LM3622AM-8.4-LM3622AMX-8.4-LM3622M-4.1-LM3622M-4.2-LM3622M-8.2-LM3622M-8.4-LM3622MX-4.1-LM3622MX-4.2-LM3622MX-8.2-LM3622MX-8.4
Lithium-Ion Battery Charger Controller
LM3622
Lithium-Ion Battery Charger Controller
General DescriptionThe LM3622isa charge controllerfor Lithium-Ion batteries.
This monolithic integrated circuit accurately controlsan ex-
ternal pass transistorfor precision Lithium-Ion battery charg-
ing. The LM3622 providesa constant voltageor constant
current (CVCC) configuration that changes,as necessary,to
optimally charge lithium-ion battery cells. Voltage charging
versions (4.1V, 4.2V, 8.2V, and 8.4V) are availablefor oneor
two cell battery packs andfor cokeor graphite anode battery
chemistry.
The LM3622 accepts input voltages from 4.5Vto 24V. Con-
troller accuracy over temperatureis ±30mV/cellforA grade
and ±50mV/cellfor the standard grade.No precision exter-
nal resistors are required. Furthermore, the LM3622’s pro-
prietary output voltage sensing circuit drains less than
200nA from the battery when the input sourceis discon-
nected.
The LM3622 circuitry includes functionsfor regulating the
charge voltage witha temperature compensated bandgap
reference and regulatingthe current withan external sense
resistor. The internal bandgap insures excellent controller
performance overthe operating temperature and input sup-
ply range.
The LM3622 can sink 15mA minimumatthe EXTpinto drive
the baseofan external PNP pass transistor.It also has
low-voltage battery threshold circuitry that removes this drive
whenthe cell voltage drops belowa preset limit. The LVSEL
pin programs this threshold voltageto either 2.7V/cellor
2.15V/cell. The low-voltage detection, whichisa user en-
abled feature, providesan output signal that canbe usedto
enablea "wakeup charge" source automaticallyto precon-
ditiona deeply discharged pack.
The LM3622is availableina standard 8-lead SOIC surface
mount package.
Features Versionsfor chargingof1 cell (4.1Vor 4.2V)or2 cells
(8.2Vor 8.4V) Versionsfor cokeor graphite anode Precision (±30mV/cell) end-of-charge control Wide input range: 4.5V-24V Low battery drain leakage: 200nA15 mA availableto drive low cost PNP
Applications Cellular phone cradle charger PDA/Notebook cradle charger Camcorder cradle charger
Typical ApplicationFebruary 2000
LM3622
Lithium-Ion
Battery
Charger
Controller
