CONTROL DEVICE EMPLOYED IN SWITCHED ELECTRICAL POWER SUPPLY SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a control device with two transistors in series for a switched electrical power supply system, the control device allowing suitable control of a second transistor regardless of the level of DC voltage.SOLUTION: A control device comprises: a first input terminal A and a second input terminal B; a first transistor T1 connected via its source to the second input terminal; and a second transistor T2 furnished with a gate G and connected via its drain D to the first input terminal A, and via its source S to the first transistor. The control device comprises: a control assembly connected to the gate of the second transistor and to the second input terminal, and comprising a capacitor Ca and a Zener diode Dz1 connected in series to the capacitor Ca; and a second Zener diode Dz2 connected between the gate and the source of the second transistor.