Patent ID: 8618846

Claim:
A solid-state switch driving circuit for a vehicle, comprising: an oscillation circuit configured to generate square waves having a specific width; a constant voltage circuit configured to supply constant voltage to the oscillation circuit; a first Field Effect Transistor (FET) ( 129 ) connected to an output of the oscillation circuit, and configured to have a drain connected to a battery via a resistor ( 123 ) and a source grounded and configured to output the square waves in response to output of the oscillation circuit; a second FET ( 113 ) configured to have a gate connected to output of the first FET ( 129 ) and to be selectively turned on and off by the first FET ( 129 ); a third FET ( 115 ) configured to have a gate connected to the drain of the first FET ( 129 ) and a drain connected to a drain of the second FET ( 113 ) and to output an output opposite to an output of the second FET ( 113 ) and to be selectively turned on and off by the first FET ( 129 ); a first time constant circuit connected to the drain of the second FET ( 113 ) and the drain of the third FET ( 115 ), and configured to have one side connected to the battery via a reverse voltage protection diode ( 101 ); wherein the reverse voltage protection diode ( 101 ) is configured to have an N pole connected in series to the first time constant circuit and a P pole connected to the battery; a solid-state power switch ( 117 ) configured to have a drain connected to the battery and a source connected to a load, and configured to selectively turn on and off power applied to the load; and a second time constant circuit configured to have one side connected to the first time constant circuit and the reverse voltage protection diode ( 101 ), another side connected to a gate of the solid-state power switch ( 117 ), and yet another side grounded.