Circuit for limiting load current with 1st transistor connected as series regulator

摘要

The circuit has a first transistor (1), which has a current input (1D), a current output (1S) and a control input (1G), a second transistor (2), which has a current input (2C), a current output (2E) and a control input (2B). A first resistance (3), which is connected at one side with the current output (1S) of the first transistor (1) and on the other side forms the output (15) of the circuit. The current input (1D) of the first transistor (1), forms the input of the circuit. The control input (1G) is connected with current input (2C) of the second transistor. The control input (2B) is connected with the current input (1S) of the first transistor (1). The current output (2E) is connected with the output (15) of the circuit. A second resistance (4) is connected between the current output (2E) of the second transistor and the output (15) of the circuit. At least one first Zener diode (5-10) is connected between the input (16) of the circuit and the current output (2E) of the second transistor (2).