Texas Instruments LM3420M5X-8.4/NOPB
- Part Number:
- LM3420M5X-8.4/NOPB
- Manufacturer:
- Texas Instruments
- Ventron No:
- 6385545-LM3420M5X-8.4/NOPB
- Description:
- Lithium-Ion Battery Charge Controller
- Datasheet:
- lm3420
- Number of series cells1
- Charge current (max) (A)0.015
- Vin (max) (V)20
- Cell chemistryLi-Ion/Li-Polymer
- Battery charge voltage (min) (V)4.2
- Battery charge voltage (max) (V)4.2
- Absolute max Vin (max) (V)20
- Control topologyLinear
- Control interfaceStandalone (RC-Settable)
- FeaturesIC thermal regulation
- Vin (min) (V)13
- RatingCatalog
- Operating temperature range (°C)-40 to 125
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 amplifiers 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.
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