High-Side Switch System, Method for Controlling the Same, Integrated Circuit Chip, and Electronic Device

A high-side switch system, comprising:

• a first switch transistor, a load, a reversed power supply protection circuit, and an input voltage bus, wherein:
• a first terminal of the first switch transistor is connected to a first terminal of the reversed power supply protection circuit;
• a second terminal of the first switch transistor is connected to a first terminal of the load at a voltage output terminal of the high-side switch system;
• a third terminal of the first switch transistor and a second terminal of the reversed power supply protection circuit are connected to the input voltage bus;
• and
• a second terminal of the load is connected to a first ground;
• wherein the reversed power supply protection circuit is configured to:
• when a positive terminal of a power supply is connected to the first ground and a negative terminal of the power supply is connected to the input voltage bus,
• receive a first voltage at a third terminal of the reversed power supply protection circuit;
• and
• in response to the first voltage, establish a current path from the third terminal to the first terminal of the reversed power supply protection circuit, to provide current to the first terminal of the first switch;
• and
• wherein the reversed power supply protection circuit is further configured to disconnect the current path when the positive terminal of the power supply is connected to the input voltage bus and the negative terminal of the power supply is connected to the first ground.