[0099] Example three
[0100] In the second embodiment, although the plug-in device power interface can supply power to different electronic devices by replacing the circuit board card with different ID information, so that one device power interface can supply power to different electronic devices, but due to the wide variety of electronic devices, at the same time It is not easy to know the power requirements of all known or unknown electronic devices. This may make users need to carry a large number of circuit board cards, or the power system cannot be used because there is no corresponding circuit board card.
[0101] Figure 3A The adaptive power supply system of the third embodiment of the present invention is shown. The adaptive power supply system 300 includes a power supply unit 301, a device power interface 320, and a device 330.
[0102] The connection relationship between the power supply unit 301, the device power interface 220 and the device 230 is the same as in the first and second embodiments, and the internal structure of the device power interface 220 is the same as in the second embodiment (or can be the same as in the first embodiment, That is, the device power interface with fixed internal connection relationship is adopted), and the description will not be repeated here.
[0103] Different from the first and second embodiments, the power supply unit 301 includes a variable voltage output unit 302, a control unit 303, an external power input terminal 304, and a power output interface 305. The control unit 303 is connected to an external display terminal (such as LED ) And the external control terminal.
[0104] As in the first embodiment, the variable voltage output unit 302 includes a power input terminal, a power output terminal, and a control terminal. Its power input terminal receives input from an external power source (such as 100-240V mains) via the external power input terminal 104, and its power output terminal is connected to the power terminal VCC308 and ground of the power output interface 305 through the power line 306 and the ground line 307 The voltage terminal GND309 can output voltage to the device via the power output interface 305 according to the information of the control terminal.
[0105] The input terminal of the control unit 303 is connected to the data terminals D+ and D- of the power output interface 105, and the output terminal of the control unit 303 is connected to the control terminal of the variable voltage output unit 102, so that the data from the data terminals D+ and D- The identification information ID controls the output of the variable voltage output unit 102.
[0106] At the same time, the control unit 303 is connected to an external display terminal (such as LED) and an external control terminal (such as a keyboard or an external computer) through an interface, and can be used to display output information from the control unit 303 through the external display terminal, and to receive information from the external control terminal. External input information. Further, the control unit 303 can also be connected to an external control terminal through a wired/wireless interface, which facilitates the exchange of information between the control unit 303 and the external control terminal.
[0107] For example, if there is no corresponding circuit board card that can prompt the device to input the power supply voltage, then insert the circuit board card with the identification information ID of a specific value (or use the device power interface with the specific ID information stored in the first embodiment) This specific value indicates that the input voltage of the electronic device cannot be determined by the device power interface but needs to be determined from the external control terminal. Then when the device power interface is connected to the device and the power supply unit, the control unit 303 receives the specific identification information ID (for example, ID=0) from the device power interface, which means that the input voltage of the electronic device cannot be determined by the device power interface and needs to be determined by For external control, the control unit 303 will output a prompt message to the external display terminal to indicate that the output voltage signal needs to be adjusted. At the same time, it can also output a prompt message to the external control terminal to indicate that the output voltage signal needs to be adjusted. Then the control unit 303 receives the signal from the external control terminal. After the voltage control signal (for example, the external control terminal determines that the device requires a 12V input voltage, then it transmits a control signal representing the 12V output voltage), the control unit 303 provides a control signal to the variable voltage output unit 102 to make the variable voltage output unit 102 change The initial output voltage reaches the voltage required by the device (for example, 12V).
[0108] Figure 3B The power supply method of the adaptive power supply system of the third embodiment is shown. When the device needs power input, the device power interface 320 is connected to the power output interface 305, and the power terminal VCC, the ground voltage terminal GND, and the data terminals D+ and D- of the two interfaces are connected correspondingly. Obviously, if the adaptive power system adopts the method in which the circuit board card can be inserted in the second embodiment, then the method in the second embodiment can also be used to insert the circuit board card into the device power interface before this step.
[0109] The variable voltage output unit 302 provides the initial output voltage to the power terminal VCC and the ground voltage terminal GND of the device power interface 320 and the power output interface 305, so that the voltage stabilizing module 323 provides a working voltage for the control unit 324 by converting the initial voltage.
[0110] After the control unit 324 is started, the stored identification information ID is transmitted to the control unit 303 via the data terminals D+ and D- of the device power interface 320 and the power output interface 305, where the identification information ID represents the voltage signal that the device needs to input.
[0111] If the control unit 303 learns the voltage signal that the device needs to input according to the identification information ID, and outputs the control signal to the variable voltage output unit 302. If the control unit 303 learns from the identification information ID that the voltage signal that the device needs to input needs to be obtained through external control, then it outputs the control information to the external display terminal or the external control terminal, and the control unit 303 receives the adjustment information from the external control terminal and outputs it according to the adjustment information The control signal is sent to the variable voltage output unit 302.
[0112] The variable voltage output unit 302 changes the output voltage according to the control signal and outputs the voltage signal that the device needs to input to the power terminal VCC of the device power interface 320 and the power output interface 305, thereby supplying power to the device.
[0113]