Power supply device for conference terminal and conference terminal equipment
A technology of power supply device and conference terminal, which is applied to circuit devices, electrical components, emergency power supply arrangements, etc., to achieve the effect of reducing power consumption and low voltage drop
Pending Publication Date: 2021-04-09
日晷科技(上海)有限公司 +1
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Problems solved by technology
[0005] This application provides a power supply device for conference terminals and conference terminal equipment, which can solve the problem of large power loss caused by power diodes on the power supply path, and the power supply switching time of power supply devices in the prior art. The problem of the load terminal voltage coming from
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[0049] The specific implementation manners of the present application will be further described in detail below in conjunction with the drawings and embodiments. The following examples are used to illustrate the present application, but not to limit the scope of the present application.
[0050] figure 2 It is a power supply device for conference terminals provided by an embodiment of this application, such as figure 2 As shown, the power supply device includes two power supply branches, namely a first power supply branch and a second power supply branch, the first power supply branch and the second power supply branch are connected in parallel, and the first power supply branch A power adapter is used as a power supply, and the second power supply branch uses POE-PD as a power supply.
[0051] The first power supply branch includes a first power supply input end, the first power supply input end is used to connect a power adapter as a power supply, the second power supply...
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The invention relates to a power supply device for a conference terminal and conference terminal equipment, and the device comprises a first power supply branch and a second power supply branch which are connected in parallel, and the first power supply branch is connected to a power adapter through a first power supply input end to serve as a power supply. The second power supply branch is connected to the POE-PD as a power supply through a second power supply input end, and the device also comprises a first MOS switch tube connected in series in the first power supply branch; a second MOS switch tube connected in series in a second power supply branch; and a power supply switching module which is used for controlling the conduction and cut-off of the first MOS switch tube and the second MOS switch tube according to the accessed power supply, and controlling the second MOS switch tube to be always in a cut-off state when the power adapter is accessed to supply power. The problems of large power consumption and large load end voltage drop of an existing power supply device are solved.
Description
technical field [0001] The application relates to a power supply device for conference terminals and conference terminal equipment, belonging to the field of power supply equipment. Background technique [0002] The conference terminal products use power adapter and POE_PD two power supply methods. The power adapter can be used for power supply alone, or POE_PD can be used for power supply alone. When both are plugged in at the same time, the power adapter is used for power supply first. [0003] Such as figure 1 As shown, in the prior art, the processing method of preferentially using the power adaptive power supply is realized by adding a power diode to the power supply path of the power adapter and the POE_PD respectively. [0004] However, due to the forward conduction voltage drop of the power diode, it causes its own dissipation power consumption, which causes temperature rise and lower power utilization, especially under high-power loads. Since the power adapter is ...
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IPC IPC(8): H02J9/06
CPCH02J9/068Y04S20/20Y02B70/30
Inventor 凌宏强范建根张洪伟
Owner 日晷科技(上海)有限公司