| 摘要 |
An electronic device protection circuit inhibits a voltage exceeding the rated voltage of the electronic device, which may include a secondary battery, from being applied and includes a positive temperature characteristic device and a diode that are connected in series and arranged in proximity to each other. The thermal fuse, the posistor, and the zener diode are arranged to conduct heat to each other, so that applying an overvoltage greater than the rated voltage to input terminals of the electronic device causes the current resulting from the overvoltage to flow through the zener diode that causes it to generate heat that accelerates the fusion of the thermal fuse.
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