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Keywords: overvoltage protection voltage AC/DC wall adapter Li-Ion battery
Portable electronic devices use internal batteries that need to be charged from an external power supply, most usually an AC/DC wall adapter. Li-ion battery technology has decreased the total weight of portable devices. However, a bad charge sequence can induce Li+ temperature increase, thermal runaway and burst, and endanger people's lives.Using overvoltage protection (OVP) devices can protect mobile devices from these causes of overvoltage. Integrating the OVP's into portables saves PCB space, defines voltage threshold, and ensures device stability. Innovative architectures have also added many new features to OVPs, such as fast turn-off times and enabling pins. OVPs are also being developed to keep up with the new standards and meet most application requirements.
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