Abstract: A charging device and a safety function control circuit and method thereof are provided. When a charging device is not connected to a load, a converted voltage value of a power connection terminal of the charging device is kept to be lower than a safe voltage value so as to maintain a safe mode. The safety function control circuit includes a first control module and a second control module for constant voltage control. The first control module and the second control module perform matching control on a power conversion circuit of the charging device, and in case of a single fault of one of the control modules, the other module is still capable of keeping the converted voltage value to be less than the safe voltage value. Thus, it is ensured that the safe mode stays functional in case of a concurrency of both a single hardware fault and a single firmware fault.

Abstract: A charging device and a safety function control circuit and method thereof are provided. When a charging device is not connected to a load, a converted voltage value of a power connection terminal of the charging device is kept to be lower than a safe voltage value so as to maintain a safe mode. The safety function control circuit includes a first control module and a second control module for constant voltage control. The first control module and the second control module perform matching control on a power conversion circuit of the charging device, and in case of a single fault of one of the control modules, the other module is still capable of keeping the converted voltage value to be less than the safe voltage value. Thus, it is ensured that the safe mode stays functional in case of a concurrency of both a single hardware fault and a single firmware fault.

Abstract: A source driver includes an output buffer, a first switch, a second switch, a third switch, a first transistor, and a second transistor. The output buffer includes a first terminal for outputting a plurality of drive voltage to drive a display panel, a second terminal for outputting a first control signal, and a third terminal for outputting a second control signal. The first switch is connected between the first terminal and a display panel. The first transistor includes a first electrode connected to the second terminal via the second switch, a second electrode connected to a first power supply, and a third electrode connected between the first switch and the display panel. The second transistor includes a fourth electrode connected to the third terminal via the third switch, a fifth electrode connected to a second power supply, and a sixth electrode connected to the third electrode of the first transistor.

Abstract: A source driver includes an output buffer, a first switch, a second switch, a third switch, a first transistor, and a second transistor. The output buffer includes a first terminal for outputting a plurality of drive voltage to drive a display panel, a second terminal for outputting a first control signal, and a third terminal for outputting a second control signal. The first switch is connected between the first terminal and a display panel. The first transistor includes a first electrode connected to the second terminal via the second switch, a second electrode connected to a first power supply, and a third electrode connected between the first switch and the display panel. The second transistor includes a fourth electrode connected to the third terminal via the third switch, a fifth electrode connected to a second power supply, and a sixth electrode connected to the third electrode of the first transistor.