LM3420AM5-4.2 ,Lithium-Ion Battery Charge ControllerApplicationstion.Theoutputisanopen-emitterNPNtransistorcapableofn Lithium-Ion battery chargingdrivi ..
LM3420AM5-4.2 ,Lithium-Ion Battery Charge ControllerFeaturesLithium-Ion rechargeable batteries.The LM3420 is availablen Voltage options for charging 1, ..
LM3420AM5-8.2 ,Lithium-Ion Battery Charge Controllerapplications (4.2V, 8.2V/8.4V, 12.6V and 16.8V respec- n Tiny SOT23-5 packagetively). n Precision ( ..
LM3420AM5-8.4 ,Lithium-Ion Battery Charge Controllerapplications (4.2V, 8.2V/8.4V, 12.6V and 16.8V respec- n Tiny SOT23-5 packagetively). n Precision ( ..
LM3420AM5-8.4 ,Lithium-Ion Battery Charge ControllerLM3420-4.2, -8.2, -8.4, -12.6, -16.8 Lithium-Ion Battery Charge ControllerJuly 2000LM3420-4.2, -8.2 ..
LM3420AM5X-12.6 ,Lithium-Ion Battery Charge ControllerGeneral Descriptionsurfacemountpackagethusallowingverycompactdesigns.The LM3420 series of controlle ..
LMP2011MA ,Single, High Precision, Rail-to-Rail Output Operational AmplifierFeaturesTheLMP201xseriesarethefirstmembersofNational’snew (For V = 5V, Typical unless otherwise not ..
LMP2011MF ,Single, High Precision, Rail-to-Rail Output Operational AmplifierFeaturesTheLMP201xseriesarethefirstmembersofNational’snew (For V = 5V, Typical unless otherwise not ..
LMP2011MFX ,Single, High Precision, Rail-to-Rail Output Operational AmplifierApplicationsOther useful benefits of the LMP201X are rail-to-rail output,n Precision instrumentatio ..
LMP2012MM ,Dual, High Precision, Rail-to-Rail Output Operational Amplifier [Preliminary]LMP2011 Single/ LMP2012 Dual Quad High Precision, Rail-to-Rail Output Operational AmplifierMarch 20 ..
LMP2012MM/NOPB ,Dual, High Precision, Rail-to-Rail Output Operational Amplifier 8-VSSOP -40 to 125Features 3 DescriptionThe LMP201x series are the first members of TI's1(For V = 5 V, Typical Unless ..
LMP2012MMX ,Dual, High Precision, Rail-to-Rail Output Operational Amplifier [Preliminary]ApplicationsOther useful benefits of the LMP201X are rail-to-rail output,n Precision instrumentatio ..
LM3420AM5-12.6-LM3420AM516.8-LM3420AM5-16.8-LM3420AM5-4.2-LM3420AM5-8.2-LM3420AM5-8.4-LM3420AM5X-12.6-LM3420AM5X-16.8-LM3420AM5X-4.2-LM3420AM5X-8.2-LM3420AM5X-8.4-LM3420M5-12.6-LM3420M516.8-LM3420M5-16.8-LM3420M5-4.2-LM3420M5-8.2-LM3420M5-8.4-LM3420M5X-12.6-LM3420M5X-16
Lithium-Ion Battery Charge Controller
LM3420-4.2, -8.2, -8.4, -12.6, -16.8
Lithium-Ion Battery Charge Controller
General DescriptionThe LM3420 seriesof controllers are monolithic integrated
circuits designedfor charging and end-of-charge controlfor
Lithium-Ion rechargeable batteries. The LM3420is available five fixed voltage versionsfor one through fourcell charger
applications (4.2V, 8.2V/8.4V, 12.6V and 16.8V respec-
tively).
Includedina very small packageisan (internally compen-
sated)op amp,a bandgap reference,an NPN output tran-
sistor, and voltage setting resistors. The amplifier’s inverting
inputis externally accessiblefor loop frequency compensa-
tion. The outputisan open-emitter NPN transistor capableof
drivingupto15 mAof output current into external circuitry. trimmed precision bandgap reference utilizes temperature
drift curvature correctionfor excellent voltage stability over
the operating temperature range. Available withan initial
toleranceof 0.5%for theA grade version, and 1%for the
standard version, the LM3420 allowsfor precision end-of-
charge controlfor Lithium-Ion rechargeable batteries.
The LM3420is availableina sub-miniature 5-lead SOT23-5
surface mount package thus allowing very compact designs.
Features Voltage optionsfor charging1,2,3or4 cells Tiny SOT23-5 package Precision (0.5%) end-of-charge control Drive capabilityfor external power stage Low quiescent current,85µA (typ.)
Applications Lithium-Ion battery charging Suitablefor linear and switching regulator charger
designs
Typical Application and Functional DiagramTypical Constant Current/Constant Voltage
Li-Ion Battery Charger
LM3420 Functional Diagram
July 2000
LM3420-4.2,
-8.2,
-8.4,
-12.6,
Lithium-Ion
Battery
Charge
Controller
