Abstract: A current detection circuit and method for protecting a speaker, and a chip are provided. The current detection circuit includes a current detection module and an analog-to-digital converter. The current detection module samples a current flowing through the speaker based on current mirror technology, and converts the current into a voltage to output a first voltage signal and a second voltage signal. The analog-to-digital converter converts the first voltage signal and the second voltage signal into a PDM code, to calculate a current parameter of the speaker.

Abstract: A bootstrap circuit supporting fast charging and discharging and a chip. A voltage measurement module (12) and a switch module (11) are arranged, and the voltage measurement module (12) controls an operating state of the switch module (11); during charging, under a specific condition, the switch module (11) is enabled to be in an on state so as to achieve fast charging of a voltage output end; and during discharging, the purpose of fast discharging is achieved by means of a second field effect transistor (MP5) arranged in the bootstrap circuit.

Abstract: The present disclosure provides a current detection circuit for a loudspeaker 500, comprising a first detection resistor RSP, a second detection resistor RSN, a sampling selection circuit 100, an input selection circuit 200, and a processing circuit 300. By adding the sampling selection circuit 100 and the input selection circuit 200, voltages on two ends of the corresponding detection resistors (RSP, RSN) are sampled according to the fact that potential differences of an output stage VOP and an output stage VON of a class-D audio power amplifier 400 are in different semi-periods, and the current of the loudspeaker 500 is obtained through processing, thereby detecting the current of the loudspeaker 500 without adding an anti-clipping distortion function to the class-D audio power amplifier 400.

Abstract: A safety protection system (100) for engineering machinery, relating to the technical field of engineering machinery.

Abstract: The present application provides a current detection circuit, chip, and current detection method used for speaker protection; by means of a current detection module, power tube current mirroring technology is used to perform sampling of a speaker current and convert the current to a voltage so as to output a first voltage signal and a second voltage signal; the design of the circuit does not increase the power loss of a Class_D circuit. Furthermore, in combination with an analog-to-digital converter, the first voltage signal and the second voltage signal are converted into PDM codes to as to calculate to obtain the current value parameter on the speaker; the effective bits may be as high as 13 bits; even though the output power of a Class_D is very large, there is no need to increase the anti-cut top distortion function, and the magnitude of the speaker current can also be detected normally.

Abstract: A bootstrap circuit supporting fast charging and discharging and a chip. A voltage measurement module (12) and a switch module (11) are arranged, and the voltage measurement module (12) controls an operating state of the switch module (11); during charging, under a specific condition, the switch module (11) is enabled to be in an on state so as to achieve fast charging of a voltage output end; and during discharging, the purpose of fast discharging is achieved by means of a second field effect transistor (MP5) arranged in the bootstrap circuit.

Abstract: The present disclosure relates to the technical field of vehicles, and provides a discharging vehicle and a vehicle charging system. The discharging vehicle includes a discharging control device, a first power battery, a motor, and a motor control circuit. A first electrode and a second electrode of the first power battery are respectively connected to a first input terminal and a second input terminal of the motor control circuit. The discharging control device realizes, by using the motor control circuit, DC step-down charging of the second power battery by the first power battery.

Abstract: The present disclosure provides a current detection circuit for a loudspeaker 500, comprising a first detection resistor RSP, a second detection resistor RSN, a sampling selection circuit 100, an input selection circuit 200, and a processing circuit 300. By adding the sampling selection circuit 100 and the input selection circuit 200, voltages on two ends of the corresponding detection resistors RSP, RSN are sampled according to the fact that potential differences of an output stage VOP and an output stage VON of a class-D audio power amplifier 400 are in different semi-periods, and the current of the loudspeaker 500 is obtained through processing, thereby detecting the current of the loudspeaker 500) without adding an anti-clipping distortion function to the class-D audio power amplifier 400.

Abstract: A detection circuit and an electronic device using the detection circuit are provided. The detection circuit includes a fourth branch, a fifth branch and a third energy storage unit. The fourth branch includes multiple fourth switches, and the fifth branch includes multiple fifth switches. A preset electrical signal threshold is sampled and applied to the third energy storage unit by controlling the multiple fourth switches in the fourth branch, and a voltage difference between two detection terminals of a first energy storage unit is sampled and applied to the third energy storage unit by controlling the multiple fifth switches in the fifth branch, to compare the voltage difference between the two detection terminals with the preset electrical signal threshold.

Abstract: A detection circuit and an electronic device using the detection circuit are provided. The detection circuit includes a fourth branch, a fifth branch and a third energy storage unit. The fourth branch includes multiple fourth switches, and the fifth branch includes multiple fifth switches. A preset electrical signal threshold is sampled and applied to the third energy storage unit by controlling the multiple fourth switches in the fourth branch, and a voltage difference between two detection terminals of a first energy storage unit is sampled and applied to the third energy storage unit by controlling the multiple fifth switches in the fifth branch, to compare the voltage difference between the two detection terminals with the preset electrical signal threshold.