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Friday, February 8, 2013

A simple thermal shutdown function for a simple DC boost converter!


Please note that the values in the circuit diagram are not the best choice but based on components i have in my modest inventory. The voltage divider (thermistor/Resistor) connected to the base of the PNP transistor should be set up to yield a suitable switching frequency (taking in consideration the value of capacitance) and a reasonable thermal behavior ! See my other posts on DC converters to see improvements and variations of the circuit! Have fun and let me know what do you think.