Circuit for bidirectional current detection and mobile terminal
A bidirectional current and circuit technology, applied in the electronic field, can solve problems such as inability to realize current detection
Pending Publication Date: 2022-04-12
北京紫光芯能科技有限公司
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Problems solved by technology
[0004] The current detection circuit in the prior art is suitable for bidirectional current detection of switching power supplies, and needs to provide auxiliary voltage to the control circuit through the auxiliary voltage generation circuit. However, the auxiliary voltage generation circuit can only periodically detect the current, and cannot achieve continuous ground current detection
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[0039] In order to understand the characteristics and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and description, and are not intended to limit the embodiments of the present disclosure. In the following technical description, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawings.
[0040] The terms "first", "second" and the like in the description and claims of the embodiments of the present disclosure and the above drawings are used to distinguish similar objects, and are not necessarily used...
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The invention relates to the technical field of electronics, and discloses a circuit for bidirectional current detection, which is applied to a charging / discharging path control circuit, and comprises a sampling tube which is configured to be connected with a grid electrode of a power tube in the charging / discharging path control circuit through a grid electrode; the current sampling circuit is configured to be respectively connected with the drain electrode of the sampling tube and the drain electrode of the power tube through a first high-voltage switch and respectively connected with the source electrode of the sampling tube and the source electrode of the power tube through a second high-voltage switch; and the logic control circuit is configured to control on or off of the first high-voltage switch and the second high-voltage switch according to the current direction of the charging / discharging path control circuit, so that the current sampling circuit samples charging current / discharging current flowing through the power tube, and continuous sampling detection of bidirectional current is realized. The invention further discloses a mobile terminal.
Description
technical field [0001] The present application relates to the field of electronic technology, for example, to a circuit for bidirectional current detection and a mobile terminal. Background technique [0002] At present, the mobile terminal can not only receive electric energy by placing it on the power transmitting board to realize wireless charging, but also provide energy to other devices with wireless receiving function to realize reverse charging. Its functions of receiving electric energy and reverse charging are often realized by the same set of coils, that is, the coils are used to receive energy and also transmit energy, and the coils can only be in one working state at the same time. Since the coil is shared, the energy transmission is also the same path. In order to control the energy transmission more accurately, it is necessary to perform current sampling on this path. In order to reduce the area of the device, an existing current detection circuit includes a...
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IPC IPC(8): G01R19/00
Inventor 张芬
Owner 北京紫光芯能科技有限公司