Patent ID: 8539265

Claim:
A power protection system for a power supply, the power protection system comprising: a motherboard comprising: a first power unit to provide voltages to elements of the motherboard; a power protection apparatus comprising: a first connector connected to a first power output of the power supply; a first current sensing resistor; a hot-swap controller comprising first and second sensing pins respectively connected to two ends of the first current sensing resistor, a monitoring pin, a clock pin, a first control pin, and a data pin; and a first electronic switch comprising first to third terminals, wherein the first terminal is connected to the first connector through the first current sensing resistor, the second terminal is connected to the first power unit and the monitoring pin of the hot-swap controller, the third terminal is connected to the first control pin of the hot-swap controller; and a microcontroller to store a preset current value of the hot-swap controller and store a related current value of the power supply, two terminals of the microcontroller respectively connected to the clock pin and data pin of the hot-swap controller; wherein the hot-swap controller acquires a first voltage from two ends of the first current sensing resistor through the first and the second sensing pins and outputs the first voltage to the microcontroller, the microcontroller acquires a first current value corresponding to the first voltage from the hot-swap controller and compares the first current value with the preset current value of the hot-swap controller, upon a condition that the first current value is less than the preset current value, the microcontroller outputs a first control signal to control the first control pin of the hot-swap controller to output a high level signal, the first electronic switch is turned on, the first power output of the power supply is outputted to the first power unit, upon a condition that the first current value is greater than the preset current value of the hot-swap controller and less than the rated current value of the power supply, the microcontroller outputs a second control signal to control the first control pin of the hot-swap controller to output a low level signal, the first electronic switch is turned off, the first power output of the power supply is not outputted to the first power unit.