Transcription of Battery Charging - Texas Instruments
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Battery Charging - Texas Instruments
LM2576,LM3420,LP2951,LP2952 Battery ChargingLiterature Number: SNVA557 Battery CHARGINGI ntroductionThe circuitry to recharge the batteries in a portable product is an important part of anypower supply design. The complexity (and cost) of the Charging system is primarilydependent on the type of Battery and the recharge chapter will present Charging methods, end-of-charge-detection techniques, andcharger circuits for use with Nickel-Cadmium (Ni-Cd), Nickel Metal-Hydride (Ni-MH),and Lithium-Ion (Li-Ion) the Ni-Cd and Ni-MH cells are similar in their Charging characteristics, they willbe presented in a combined format, and the Li-Ion information will Charging INFORMATIONIn the realm of Battery Charging , Charging methods are usually separated into two gen-eral categories.
ing the battery in about 4 hours. The ability to easily charge a Ni-Cd battery in less than 6 hours without any end-of-charge detection method is the primary reason they dominate cheap consumer products (such as toys, flashlights, soldering irons). A trickle charge circuit can be made using a cheap wall cube as the DC source, and a
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