A Power Supply Method for Detonation Control Module with Threshold of Opening and Closing Voltage

Aiming at the shortcomings of power supply circuit composed of energy storage capacitor and ordinary linear voltage regulator, such as slow power down and input voltage fluctuation affecting output voltage, a power supply method for detonation control module with threshold of opening and closing voltage is proposed. In this method, a 3.3V linear regulator with threshold value of opening and closing voltage is introduced, which is realized by combining energy storage capacitor and 5V linear regulator. Set the starting and closing voltage threshold to control the enabling pin of 3.3V linear voltage regulator by using resistance voltage divider. When the input voltage rises to the starting voltage, the regulator will start quickly and keep the output voltage stable. When the input voltage drops to the closing voltage value, the output voltage of the voltage regulator will power down quickly. The 3.3V linear regulator with opening and closing voltage threshold significantly reduces the time that the output voltage follows the input voltage during power on and power off, and effectively reduces the impact of input voltage jitter on the output voltage. The verification results show that the speed of powering on and powering off of the circuit developed by the power supply method can meet the power supply requirements of the detonating control module, and the power supply voltage is stable, which can effectively reduce the risks of program runaway and "crash" during powering on and powering off of the microcontroller.