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Development of a battery-specific charging regulator IC/battery voltage monitoring IC that supports CV (Constant Voltage) charging

From: Date:2022-6-22

Torex Semiconductor Co., Ltd. (Managing Director, Chuo-ku, Tokyo, Japan: Koji Shibayama Daiichi: 6616, hereinafter referred to as "Torex") has developed a battery-specific charging device that supports CV (Constant Voltage) charging. Voltage regulator IC XC6240 and battery voltage monitoring IC XC6140.

In recent years, various batteries such as semi-solid batteries and all-solid-state batteries have been developed, among which CV (constant voltage) rechargeable batteries are being developed. This time, Torex has developed a charging regulator IC and a battery voltage monitoring IC that can perform constant voltage (CV) charging of 2.3V series-connected lithium secondary batteries.

The charging voltage regulator IC can meet the voltage requirements of the 2.3V lithium secondary battery charging voltage, and can output a charging voltage that does not exceed the upper limit of the secondary battery even if the deviation is considered. It is also possible to suppress the sink current (sink current) flowing from the secondary battery to the charging IC when the secondary battery is not being charged, which greatly contributes to prolonging the battery drive time.

The battery voltage monitoring IC sets the detection voltage and discharge voltage suitable for the battery characteristics of the 2.3V series lithium secondary battery. The detection voltage can be selected from 1.6V to 2.2V depending on the application and the internal resistance of the battery. The release voltage is fixed at 2.475V, which is the release voltage when the charging regulator starts charging.

In addition to the small, low-profile packages (XC6240: USPN-4, USP-6B06 / XC6140: USPQ-4B05), these two products also offer the SSOT-24, which can be installed in small, low-profile and various applications. on the device.