| 摘要 |
<p>A control device and method for overcurrent or short-circuit protection of an electronic cigarette, comprising an input module (100), a power supply module (300), a heating element (500), a switch control module (200), a comparator (600) and a field effect transistor (400). An actual operating voltage generated by an operating current flowing through the internal resistance of the field effect transistor is detected in real time by the field effect transistor (400). A reference voltage and the actual operating voltage are compared by the comparator (600). A comparison result is output to the switch control module (200). When the actual operating voltage is less than the reference voltage, the switch control module (200) outputs a high level, the switch control module (200) keeps the field effect transistor (400) conducted and continuously heats the heating element (500). When the comparator (600) judges that the actual operating voltage is greater than the reference voltage, the switch control module (200) outputs a low level to the field effect transistor (400) for controlling same to be disconnected and then de-energizes the heating element (500) for achieving the function of protecting the electronic cigarette.</p> |
