Universal Serial Bus Power Transfer Device
A universal serial bus, power transmission technology, used in output power conversion devices, DC power input to DC power output, instruments and other directions, can solve the problem of adaptive adjustment of protection points that cannot output current, device protection, burn-out loads, etc. problems to improve the user experience
Active Publication Date: 2018-06-29
LENOVO (BEIJING) LTD
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Problems solved by technology
In the USB power transmission device 100 in the prior art, although the purpose of controlling the output voltage can be achieved, it cannot be adaptively adjusted for the output current protection point of each voltage
Although the power transmission controller 140 controls the output voltage by adjusting the feedback divided voltage, the overvoltage protection of the output voltage of the power converter 130 can be adaptively changed, but when the power converter 130 itself fails, for example, When a short circuit occurs, the input high voltage will be directly connected to the power consumption end and the connected load will be burned
In addition, even though the power transmission controller 140 has an output voltage detection function, when the detection circuit inside the power transmission controller 140 detects an output overvoltage and then disconnects the output of the power converter 130, it is too late to detect the output voltage of the power consumption terminal 140. device for protection
Method used
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[0025] Various embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Here, it is to be noted that, in the drawings, the same reference numerals are assigned to components having substantially the same or similar structures and functions, and repeated descriptions about them will be omitted.
[0026] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one of the described embodiments. Thus, appearances of the phrase "in one embodiment" or "in an embodiment" in the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.
[0027] Below, will refer to figure 2 A USB power transmission device according to an emb...
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A universal serial bus power transmission device is provided, comprising: an input end configured to be connected to a power source and receive an input voltage; a connector configured to be connected to a load and provide an output voltage to the load; a power converter configured to to convert the input voltage to the output voltage; a power transmission controller configured to adjust the output voltage of the power converter according to the power demand of the load or start the power converter to provide the output voltage; and secondary protection a module configured to receive a power demand of the load from the power transfer controller, the secondary protection module disconnects a circuit between the power converter and a connector when overcurrent or overvoltage is detected connect. The universal serial bus power transmission device provided by the invention has both the adaptive adjustment function of the overcurrent protection point and the overvoltage protection function, thereby making the electronic equipment more efficient and practical.
Description
technical field [0001] The present invention relates to a power transmission device, more particularly to a universal serial bus power transmission device. Background technique [0002] Portable small electronic devices such as mobile phones or tablet computers often include a USB power transmission device with a USB (Universal Serial Bus) interface for supplying power to external devices connected through the USB interface. A typical USB power transfer device generally works in the following manner. When the power supply end determines that the USB power transmission cable is plugged in, the handshake process begins: first, the protocol engine of the power supply end sends the voltage that the power consumption end can support (for example, 5 volts, 12 volts, and 20 volts) to the power consumption end; then , the protocol engine of the power consumption end receives the voltage it can support from the power supply end and selects the voltage it needs, and sends the demand ...
Claims
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IPC IPC(8): H02M3/00H02H3/08H02H3/20
Inventor 张晓晴郭淳
Owner LENOVO (BEIJING) LTD