Abstract:
A power control system allowing multiple voltage levels from a single power adaptor includes a power supply device and an electronic device. The power supply device includes a power supply and a first power controller. The power supply is configured to supply power for a graphics card as an external renderer, and the first power controller is configured to output a voltage signal. The electronic device includes a second power controller electrically coupled to the first power controller and the second power controller is configured for obtaining the voltage signal from the first power controller. The first power controller can output a first voltage or a second voltage to the second power controller to supply power for the electronic device.

Description:
FIELD 
       [0001]    The subject matter herein generally relates to power control system. 
       BACKGROUND 
       [0002]    In a computer system, when using external graphics in a notebook for graphics performance ascension, users need two power adapters configured to supply power for the external graphics renderer and for the notebook computer. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0003]    Implementations of the present technology will now be described, by way of example only, with reference to the attached figures. 
           [0004]      FIG. 1  is a block diagram of an embodiment of a power control system, the power control system including a power supply device and an electronic device. 
           [0005]      FIG. 2  is a block diagram of an embodiment of the power supply device of  FIG. 1 . 
           [0006]      FIG. 3  is a block diagram of another embodiment of the electronic device of  FIG. 1 . 
           [0007]      FIG. 4  is a circuit diagram of the power supply device of  FIG. 1 . 
           [0008]      FIG. 5  is a circuit diagram of the electronic device of  FIG. 1 . 
       
    
    
     DETAILED DESCRIPTION 
       [0009]    It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean “at least one”. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures, and components have not been described in detail so as not to obscure the related relevant feature being described. Also, the description is not to be considered as limiting the scope of the embodiments described herein. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features of the present disclosure. 
         [0010]    Several definitions that apply throughout this disclosure will now be presented. 
         [0011]    The term “coupled” is defined as connected, whether directly or indirectly through intervening components, and is not necessarily limited to physical connections. The connection can be such that the objects are permanently connected or releasably connected. The term “comprising” means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in a so-described combination, group, series, and the like. 
         [0012]      FIG. 1  illustrates a power control system  100  of an embodiment of the present disclosure. 
         [0013]    The power control system  100  can comprise a power supply device  10  and an electronic device  20 . The power supply device  10  is electrically coupled to the electronic device  20  to supply power for the electronic device  20 . 
         [0014]    In at least one embodiment, the electronic device  20  can be a notebook computer. 
         [0015]      FIG. 2  illustrates an embodiment of the power supply device  10 . The power supply device  10  can comprise a power supply  12 , a voltage conversion chip  14 , a first power controller  16 , a first connector  18 , and an electronic switch Q 1 . 
         [0016]    The power supply  12  is electrically coupled to a graphics card  11  to supply power for the graphics card  11 . The power supply  12  is also electrically coupled to an alternating current (AC) power supply  30 . The power supply  12  obtains an AC power from the AC power supply  30 , and outputs a 5V voltage to the first power controller  16 . In at least one embodiment, the power supply  12  can be an advanced technology extended (ATX) power supply. 
         [0017]    The first power controller  16  obtains the 5V voltage from the power supply  12 , and outputs the 5V voltage to the first connector  18 . 
         [0018]    Both the voltage conversion chip  14  and the electronic switch Q 1  are electrically coupled between the power supply  12  and the first power controller  16 . The electronic switch Q 1  is configured to output a power control signal to the power supply  12 , to control the power supply  12  to output a 12V voltage to the conversion chip  14  and the first power controller  16 . 
         [0019]    The voltage conversion chip  14  converts the 12V voltage from the power supply  12  to 19 volts, and outputs the 19V voltage to the first power controller  16 . 
         [0020]      FIG. 3  illustrates an embodiment of the electronic device  10 . The electronic device  10  can comprise a platform controller hub (PCH) chip  22 , a second power controller  24 , a second connector, and a switch SW. 
         [0021]    The second connector  26  obtains the 5V voltage from the first connector  18 , and outputs the 5V voltage to the second power controller  24 . In at least one embodiment, both the first connector  18  and the second connector  26  can be a Type-C connector. 
         [0022]    When the second power controller  24  obtains the 5V voltage from the first power controller  16 , the first power controller  16  communicates with the second power controller  24 . Under a communication protocol, the first power controller  16  is a host device and the second power controller  24  is a slave device, and the power supply device  10  can supply power for the electronic device  10 . 
         [0023]    The switch SW is electrically coupled to the PCH chip  22  to output a switch control signal to the PCH chip  22 . 
         [0024]    The PCH chip  22  obtains the switch control signal from the switch SW, and outputs a boot control signal to the second power controller  24 . 
         [0025]    The second power controller  24  outputs a power request signal to the first power controller  16  according to the boot control signal outputted by the PCH chip  22 . The first power controller  16  controls the power supply  12  to output a 12V voltage to the voltage conversion chip  14  and the first power controller  16 . The voltage conversion chip  14  converts the 12V voltage to a 19V voltage, and transmits the 19V voltage to the first power controller  16 . 
         [0026]    The first power controller  16  outputs a 12V voltage or a 19V voltage to the second power controller  24  according to the communication protocol. 
         [0027]    The second power controller  24  obtains the 12V voltage or the 19V voltage from the first power controller  16  and supplies power for the electronic device  20 . 
         [0028]      FIG. 4  illustrates a circuit diagram of an embodiment of the power supply device  10 . 
         [0029]    A power supply first voltage pin 12V is electrically coupled to a first power controller first voltage pin 12V. A power supply second voltage pin 5V is electrically coupled to a first power controller second voltage pin 5V. The power supply first voltage pin 12V is also electrically coupled to a voltage conversion chip voltage input pin 12V. A voltage conversion chip voltage output pin 19V is electrically coupled to a first power controller third voltage pin 19V. 
         [0030]    A power supply power signal pin PS_ON# is electrically coupled to an electronic switch first terminal. An electronic switch second terminal is grounded. An electronic switch third terminal is electrically coupled to a first power controller signal output pin SLP_S3#. A first power controller voltage output pin VBUS is electrically coupled to a first connector power pin VBUS. Two first power controller communication pins CC 1  and CC 2  are electrically coupled respectively to two first connector communication pins CC 1  and CC 2 . 
         [0031]      FIG. 5  illustrates a circuit diagram of an embodiment of the electronic device  20 . 
         [0032]    A switch first terminal is grounded, a switch second terminal is electrically coupled to a PCH chip switch control pin PWRBTN#. A PCH chip boot control pin SLP_S3# is electrically coupled to a second power controller boot control pin SLP_S3#. 
         [0033]    A second power controller first voltage pin 5V is electrically coupled to an electronic device auxiliary power supply terminal 5V. Both a second power controller second voltage pin 12V and a second power controller third voltage pin 19V are electrically coupled to an electronic device main power supply terminal Main_Power. A second power controller voltage receive pin VBUS is electrically coupled to a second connector power pin VBUS. Two second power controller communication pins CC 1  and CC 2  are electrically coupled respectively to two second connector communication pins CC 1  and CC 2 . 
         [0034]    When the first connector  18  is connected to the second connector  26 , the first connector power pin VBUS is electrically coupled to the second connector power pin VBUS. The two first connector communication pins CC 1  and CC 2  are also electrically coupled to the two second connector communication pins CC 1  and CC 2 . 
         [0035]    In at least one embodiment, the electronic switch Q 1  can be a field effect transistor (FET). The electronic switch first terminal can be a FET drain. The electronic switch second terminal can be a FET source. The electronic switch third terminal can be a FET gate. 
         [0036]    In use, the power supply  12  outputs the 5V voltage to the first power controller  16 , and the first power controller  16  transmits the 5V voltage to the second power controller  24  through the first connector  18  and the second connector  26 . When the second power controller  24  receives the 5V voltage from the first power controller  16 , the first power controller  16  communicates with the second power controller  24 , and the power supply device  10  can supply power for the electronic device  10 . In the meantime, the second power controller  24  outputs the 5V voltage to the electronic device auxiliary power supply terminal 5V. 
         [0037]    When the switch SW is pressed, the switch SW outputs the switch control signal to the PCH chip  22 . The PCH chip  22  outputs the boot control signal to the second power controller  24 . The second power controller  24  outputs the power request signal to the first power controller  16 . The first power controller  16  outputs a trigger signal at the high-voltage level to turn on the electronic switch Q 1 , and the electronic switch Q 1  outputs a power control signal at the low-voltage level to the power supply power signal pin PS_ON#. The power supply  12  outputs the 12V voltage to the first power controller  16  and the voltage conversion chip  14 . The voltage conversion chip  14  converts the 12V voltage to a 19V voltage, and transmits the 19V voltage to the first power controller  16 . The first power controller  16  outputs the 12V voltage or the 19V voltage to the second power controller  24 . Thus, the second power controller  24  can output the 12V voltage or the 19V voltage to the electronic device main power supply terminal Main_Power to supply power for the electronic device  20 . 
         [0038]    The embodiments shown and described above are only examples. Many details are often found in the art such as the other features of power control system. Therefore, many such details are neither shown nor described. Even though numerous characteristics and advantages of the present technology have been set forth in the foregoing description, together with details of the structure and function of the present disclosure, the disclosure is illustrative only, and changes may be made in the detail, especially in matters of shape, size, and arrangement of the parts within the principles of the present disclosure, up to and including the full extent established by the broad general meaning of the terms used in the claims. It will therefore be appreciated that the embodiments described above may be modified within the scope of the claims.