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A charging circuit, a data cable and a charging interface
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A charging interface and charging circuit technology, applied in the field of communications, can solve problems such as increased contact impedance
Active Publication Date: 2018-12-04
VIVO MOBILE COMM CO LTD
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[0003] The embodiment of the present invention provides a charging circuit, a data line and a charging interface to solve the problem in the prior art that an arc is generated at the contact position due to pulling out the USB data line when the mobile terminal is charging, resulting in an increase in the contact impedance
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no. 1 example
[0029] The embodiment of the present invention provides a charging circuit, which is applied to the charger 1 . Among them, such as figure 1 and figure 2 As shown, the charging circuit includes: a voltage output terminal 101 , a second charging interface 102 and a detection control circuit 103 .
[0030] Wherein, the second charging interface 102 is used to electrically connect with the first charging interface 201 of the mobile terminal 2 to be charged, and the charging current output by the voltage output terminal 101 is transmitted to the first charging interface 201 through the second charging interface 102 .
[0031] Among them, such as figure 1 As shown, the second charging interface 102 includes: a connection detection pin (ie figure 1 L in 测 ) and the Vbus pin connected to the voltage output terminal 101.
[0032] Wherein, the detection control circuit 103 is used to detect whether the second charging interface 102 is separated from the first charging interface 2...
no. 2 example
[0042] The embodiment of the present invention provides a data line 3, such as image 3 and Figure 4 As shown, the data cable 3 includes: a first plug 301 and a second plug 302 .
[0043] Wherein, the first plug 301 is connected to the second charging interface 102 of the charger 1 , and the second plug 302 is connected to the first charging interface 201 of the mobile terminal 2 .
[0044]Wherein, the first plug 301 and the second plug 302 respectively include a Vbus pin, a D+ pin, a D- pin and a ground GND pin, and the first plug 301 and the second plug 302 also include a Connect the sense pin, such as Figure 5 As shown, the length of the connection detection pin is smaller than the length of the Vbus pin, and the connection detection pin in the first plug 301 is connected to the connection detection pin in the second plug 302 through a metal wire.
[0045] Wherein, the length of the connection detection pin described here is less than the length of the Vbus pin specifi...
no. 3 example
[0050] The embodiment of the present invention provides a charging interface 201 which is applied to the mobile terminal 2 . Such as Figure 6 and Figure 7 As shown, the charging interface 201 (that is, the first charging interface 201 described in the first embodiment and the second embodiment) includes: a Vbus pin, a D+ pin, a D- pin and a ground GND pin pin, and a connection detection pin, which is electrically connected to a voltage source 202 in the mobile terminal 2.
[0051] During the charging process, the connection detection pin in the mobile terminal 2 is connected to the charging interface 102 of the charger 1 (that is, the second charging interface described in the first embodiment and the second embodiment) through an additional signal line in the data line 3. 102) The connection detection pin is electrically connected. Among them, one of the pins at both ends of the external signal line in the data line 3 is electrically connected to the connection detection...
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Abstract
The invention discloses a charging circuit. The charging circuit is applied to a charger. The charging circuit comprises a voltage output end, a second charging interface and a detection control circuit, wherein the second charging interface is used for being connected with a first charging interface of a to-be-charged mobile terminal, a charging current output by the voltage output end is transmitted to the first charging interface through the second charging interface, and the second charging interface comprises a Vbus pin connected with a detection pin and the voltage output end; the detection control circuit is used for detecting whether the second charging interface is separated from the first charging interface or not by connecting the detection pin, and when it is detected that the second charging interface is separated from the first charging interface, connection between the voltage output end and the Vbus pin is controlled to be cut. The invention also discloses a data cable and a charging interface. By means of the charging circuit, the data cable and the charging interface in the technical scheme, the problem that as the data cable is pulled out when the mobile terminal is charged, an electric arc is generated at the contact position, the contact resistance is enlarged can be solved.
Description
technical field [0001] The invention relates to the technical field of communication, in particular to a charging circuit, a data line and a charging interface. Background technique [0002] During the charging process of the mobile terminal, if the data line is pulled out, an arc will be generated at the contact position, and the metal tongue at the contact position will be oxidized, resulting in an increase in contact impedance and loss, especially for the current low-voltage and high-current direct charging process. , due to the higher requirements on the overcurrent capability of the charging path and the oxidation resistance of the conductive material, if the impedance of the charging path increases, it may cause excessive heat generation at the location with high contact impedance, causing accidents such as scalding users or even burning equipment. Contents of the invention [0003] Embodiments of the present invention provide a charging circuit, a data cable, and a ...
Claims
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Application Information
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