| shape: | Flat |
|---|---|
| Conductive Type: | Bipolar Integrated Circuit |
| Integration: | MSI |
| Technics: | Semiconductor IC |
| Application: | Standard Generalized Integrated Circuit |
| Type: | Digital / Analog IC |
| Samples: |
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| Customization: |
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Suppliers with verified business licenses
Audited Supplier | Package | PinsSOT-23 (DBV) | 5 |
| Operating temperature range (°C)-40 to 125 |
| Package qty | Carrier3,000 | LARGE T&R |
The LM3420 series of controllers are monolithic integrated circuits designed for charging and end-of-charge control for lithium-ion rechargeable batteries. The LM3420 is available in an 8.4-V version for one through four cell charger applications.
Included in a very small package is an (internally compensated) op amp, a bandgap reference, an NPN output transistor, and voltage setting resistors. The amplifier's inverting input is externally accessible for loop frequency compensation. The output is an open-emitter NPN transistor capable of driving up to 15 mA of output current into external circuitry.
A trimmed precision bandgap reference utilizes temperature drift curvature correction for excellent voltage stability over the operating temperature range. The LM3420 series allows for precision end-of-charge voltage threshold for lithium-ion rechargeable batteries. The premium grade LM3420A is available with an initial voltage threshold tolerance of ±0.5%, while the standard grade LM3420 has an initial voltage threshold tolerance of ±1%.
The LM3420 is available in a sub-miniature 5-lead surface mount package thus allowing very compact designs.
Suppliers with verified business licenses
Audited Supplier 
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