Electronic circuit arranged to control voltage applied to a load

摘要

The present invention is concerned with an electronic circuit (C) that is connectable to a voltage source (B) and a load (M). The circuit (C) comprises a controllable load switch element (TL) that is arranged so that a supply voltage (V S ) provided by the voltage source (B) in a connected state is provided to the load (M) when the load switch element (TL) is switched on and is not provided to the load (M) when the load switch element (TL) is switched off and a voltage detection circuitry (VD) that in the connected state is coupled to the load (M) so as to be energized by the voltage (pV S ) applied to the load (M). The circuit further comprises a switch-on circuitry (Son) that is coupled to the load switch element (TL) and is arranged to switch on the load switch element (TL) for a determined period of time (T) after a switch (S1) arranged between the switch-on circuitry (Son) and the voltage source (B) is closed. The proposed circuit allows for using a simple voltage detection circuit (VD) that is energized by the voltage to be measured by providing the switch-on circuitry (Son).