Undervoltage protection. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Protection of equipment from emergency operation of the network, uninterruptible power supplies
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Below is a diagram of automatic load disconnection based on the minimum allowable voltage. The current consumption is about 6-8 mA.
(click to enlarge)
The response threshold is adjusted by potentiometer R1. The circuit below is designed for a nominal voltage of 16 Volts, a threshold of 12-13 Volts. The turn-on voltage is adjusted by potentiometer R6.
If you plan to work with loads of about 5 amperes, it is advisable to install the Q3 transistor on a small radiator.
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