Rohm has developed a battery charger chip to provide low-voltage charging of wearables like wireless ear buds and thin, compact IoT devices such as smart displays powered by rechargeable batteries.
As well as supporting low voltage charging of lithium ion batteries, the BD71631QWZ also supports types of rechargeable batteries such as all-solid and semi-solid state over a wide range from 2.0V to 4.7V by improving the stability of the internal circuit.
In recent years the need for safer, higher density rechargeable batteries has led to the development of new battery types. This includes all-solid/semi-solid types models using novel materials for the electrode part and batteries that adopt different terminal compositions. However, many of the latest rechargeable batteries are small and thin, requiring low voltage charging in the 2V to 3V range.
Unlike general battery charger ICs that provide a fixed voltage, the BD71631QWZ allows the charge voltage to be easily set by simply changing the external resistor, reducing design load when changing batteries.
Custom packaging results in a compact package just 0.4mm thickness, which is 60 percent lower than conventional products in market. E each charging characteristic including charge/termination current can be set for CCCV charging, providing an optimal charging environment for thin, compact IoT and wearable devices utilizing the latest rechargeable batteries.
Going forward, ROHM will continue to contribute to providing greater application convenience by supplying more efficient charging solutions.
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