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Lithium-Ion Battery-Charging Control IC Supports USB Charging

Thu, 12/01/2011 - 6:57am
Li-ion battery charge ICRenesas Electronics Corporation announced a charging control integrated circuit (IC), the R2A20055NS, that achieves further miniaturization and safe charging control for single-cell lithium-ion batteries used in portable devices. In addition to the full complement of protection features necessary for portable equipment, including battery overvoltage protection and charging timers, the new IC includes functions that implement the charging profiles stipulated by JEITA, which allow the R2A20055NS IC to implement safe charging control. It provides control pins for each block to limit the input current. Current limit options are 100 mA, 500 mA, or no limit; thus, it can perform battery charging according to the USB power available. The R2A20055NS input pins have high withstand voltage of 25 V, and the company has added new overvoltage protection functions to the input pins. These can protect application systems from the overshoot that occurs when a power adapter or USB cable is connected. The IC implements the functions in a 2.0 × 2.5 millimeter (mm) ultra-miniature, high thermal dissipation, 10-pin HUSON package, and thus can contribute to further miniaturization in portable equipment.

Renesas Electronics Corporation
4083827500, http://am.renesas.com

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