Protection circuit for power switch

A circuit comprising:

• a first voltage input, a second voltage input, a first control signal input, a second control signal input, and a voltage output;
• a first transistor coupled between the first voltage input and the voltage output in a first current path, the first current path including the first voltage input, a first terminal of the first transistor, a second terminal of the first transistor, and the voltage output;
• a second transistor including a first terminal coupled to second voltage input, a second terminal coupled to a control terminal of the first transistor, and a control terminal coupled to the first control signal input;
• a third transistor including a first terminal coupled to the control terminal of the first transistor, a second terminal coupled to the voltage output, and a control terminal coupled to the first control signal input;
• a fourth transistor coupled between the control terminal of the first transistor and ground in both a second current path and a third current path parallel to than the second current path, the second current path and the third current path including the control terminal of the first transistor, a first terminal of the fourth transistor, a second terminal of the fourth transistor, and ground, the fourth transistor including a control terminal coupled to the second control signal input;
• a fifth transistor coupled between the control terminal of the first transistor and the first terminal of the fourth transistor in the second current path, the second current path further including a first terminal of the fifth transistor and a second terminal of the fifth transistor;
• a sixth transistor coupled between the control terminal of the first transistor and the first terminal of the fourth transistor in the third current path, the third current path further including a first terminal of the sixth transistor and a second terminal of the sixth transistor;
• a seventh transistor coupled between the control terminal of the first transistor and the voltage output in a fourth current path, the fourth current path including the control terminal of the first transistor, a first terminal of the seventh transistor, a second terminal of the seventh transistor, and the voltage output;
• an eighth transistor coupled between ground and the voltage output in a fifth current path, the fifth current path including ground, a first terminal of the eighth transistor, a second terminal of the eighth transistor, and the voltage output, the eighth transistor including a control terminal coupled to a control terminal of the seventh transistor;
• and
• a ninth transistor coupled between ground and the first terminal of the eighth transistor in the fifth current path, the fifth current path further including a first terminal of the ninth transistor and a second terminal of the ninth transistor.

A system comprising:

• a controller including a first output and a second output;
• a voltage source;
• a voltage converter including an input and an output, the input of the voltage converter coupled to the voltage source;
• load circuitry including an input;
• and
• switching circuitry coupled to the controller, the voltage source, the voltage converter, and the load circuitry, the switching circuitry including:
• a first voltage input coupled to the voltage source;
• a second voltage input coupled to the output of the voltage converter;
• a voltage output coupled to the input of the load circuitry;
• a first control signal input coupled to the first output of the controller;
• a second control signal input coupled to the second output of the controller;
• a first transistor coupled between the first voltage input and the voltage output in a first current path, the first current path including the first voltage input, a first terminal of the first transistor, a second terminal of the first transistor, and the voltage output;
• transistor control circuitry coupled between the second voltage input and a control terminal of the first transistor in a first control path, and coupled between the voltage output and the control terminal of the first transistor in a second control path, the transistor control circuitry including a control terminal coupled to the first control signal input, the first control path including the second voltage input, a first terminal of the transistor control circuitry, a third terminal of the transistor control circuitry, and the control terminal of the first transistor, the second control path including the voltage output, a second terminal of the transistor control circuitry, the third terminal of the transistor control circuitry, and the control terminal of the first transistor;
• first protection circuitry coupled between the control terminal of the first transistor and ground in a second current path and coupled between the control terminal of the first transistor and ground in a third current path parallel to than the second current path, the first protection circuitry including a control terminal coupled to the second control signal input, the second current path including the control terminal of the first transistor, a first terminal of the first protection circuitry, a third terminal of the first protection circuitry, and ground, the third current path including the control terminal of the first transistor, a second terminal of the first protection circuitry, the third terminal of the first protection circuitry, and ground;
• and
• second protection circuitry coupled between the control terminal of the first transistor and the voltage output in a fourth current path, the second protection circuitry including a control terminal coupled to the voltage output, the fourth current path including the control terminal of the first transistor, a first terminal of the second protection circuitry, a second terminal of the second protection circuitry, and the voltage output.