Control circuit for automatically detecting charging of mobile phone by charging line

Abstract

The utility model discloses a control circuit for automatically detecting charging of a mobile phone by a charging line, which relates to the technical field of circuits and comprises a charging management chip, an MCU (Microprogrammed Control Unit) controller, a charging interface and a detection circuit, and the signal output end of the charging interface is respectively connected with the signal input end of the charging management chip and the signal input end of the detection circuit. The signal output end of the charging management chip is connected with the input end of the MCU controller, the detection circuit is connected with the MCU controller, the resistor R111 is connected to an IO port of the MCU controller, and a DN signal is connected to a port and the MCU controller; under the condition that no iPhone exists, the MCU controller outputs a high level through the IO port; when an iPhone is connected, the DN generates a low level, at the moment, the MCU controller detects the signal so as to control the charging chip, and the circuit for charging the iPhone and automatically identifying the iPhone is used for realizing automatic charging.

Description

Technical Field

[0001] The utility model relates to the technical field of mobile phone charging, in particular to a control circuit for automatically detecting mobile phone charging via a charging cable. Background Art

[0002] There is a detection and identification chip on the original charging cable of the Apple mobile phone, so if the Apple charging cable is always plugged into the output port of the mobile power bank, it will continue to consume power. If it is not used for a long time, the battery of the mobile power bank will be in a low-power state.

[0003] To solve this problem, power banks often have a low current detection function that turns off the output when the output current is less than a certain value. However, this will prevent the power bank from automatically charging the next time you connect it to an iPhone, requiring you to press a button to wake up the power bank before charging the iPhone.

[0004] In order to resolve this contradiction, this patent invents a circuit that automatically identifies Apple mobile phones to achieve automatic charging. Utility Model Content

[0005] The technical problem to be solved by the present invention is to provide a control circuit for automatically detecting mobile phone charging through a charging cable in response to the deficiencies in the background technology, which can automatically identify the circuit of an Apple mobile phone to achieve automatic charging.

[0006] The present invention adopts the following technical solutions to solve the above technical problems:

[0007] A control circuit for automatically detecting mobile phone charging via a charging cable comprises a charging management chip, an MCU controller, a charging interface, and a detection circuit. The signal output end of the charging interface is respectively connected to the signal input end of the charging management chip and the signal input end of the detection circuit. The signal output end of the charging management chip is connected to the input end of the MCU controller. The detection circuit is connected to the MCU controller.

[0008] As a further preferred solution of a control circuit for automatically detecting mobile phone charging using a charging cable of the present invention, the detection circuit includes a C-WAKE interface, a resistor R111, a resistor R142, a diode D7, a diode D8, a resistor R107, a resistor R141, a DN1 signal terminal, and a DN2 signal terminal; the C-WAKE interface is connected to one end of the resistor R111, the other end of the resistor R111 is respectively connected to one end of the resistor R142, the positive electrode of the diode D7, and the positive electrode of the diode D8, the negative electrode of the diode D7 is connected to one end of the resistor R107, the other end of the resistor R107 is connected to the DN1 signal terminal, the negative electrode of the diode D8 is connected to one end of the resistor R141, and the other end of the resistor R141 is connected to the DN2 signal terminal.

[0009] Compared with the prior art, the above technical solution adopted by the present invention has the following technical effects:

[0010] The utility model discloses a control circuit for automatically detecting charging of a mobile phone via a charging cable, comprising a charging management chip, an MCU controller, a charging interface, and a detection circuit. The signal output end of the charging interface is respectively connected to the signal input end of the charging management chip and the signal input end of the detection circuit, the signal output end of the charging management chip is connected to the input end of the MCU controller, the detection circuit is connected to the MCU controller, a resistor R111 is connected to the IO port of the MCU controller, and a DN signal is connected to the port and the MCU controller; in the absence of an Apple mobile phone, the MCU controller outputs a high level through the IO port; when an Apple mobile phone is connected, DN generates a low level, at which point the MCU controller detects this signal, thereby controlling the charging chip. The utility model charges an Apple mobile phone and automatically identifies the circuit of the Apple mobile phone, thereby realizing automatic charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a structural principle diagram of a control circuit for automatically detecting mobile phone charging via a charging cable in the utility model;

[0012] Figure 2 This is a circuit diagram of an activation circuit for a detection circuit that automatically detects mobile phone charging using a charging cable in the utility model;

[0013] Figure 3 The utility model discloses a circuit diagram of an identification circuit for automatically detecting mobile phone charging via a charging cable. DETAILED DESCRIPTION

[0014] The technical solution of the present invention is further described in detail below with reference to the accompanying drawings:

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] A control circuit for automatically detecting mobile phone charging via a charging cable, such as Figure 1As shown, it includes a charging management chip, an MCU controller, a charging interface, and a detection circuit. The signal output end of the charging interface is respectively connected to the signal input end of the charging management chip and the signal input end of the detection circuit. The signal output end of the charging management chip is connected to the input end of the MCU controller. The detection circuit is connected to the MCU controller. This utility model automatically recognizes the circuit of the Apple phone when charging, thereby achieving automatic charging.

[0017] like Figure 2 As shown, the activation circuit of the detection circuit includes a C-WAKE interface, a resistor R111, a resistor R142, a diode D7, a diode D8, a resistor R107, a resistor R141, a DN1 signal terminal, and a DN2 signal terminal; the C-WAKE interface is connected to one end of the resistor R111, the other end of the resistor R111 is respectively connected to one end of the resistor R142, the anode of the diode D7, and the anode of the diode D8, the cathode of the diode D7 is connected to one end of the resistor R107, the other end of the resistor R107 is connected to the DN1 signal terminal, the cathode of the diode D8 is connected to one end of the resistor R141, and the other end of the resistor R141 is connected to the DN2 signal terminal.

[0018] Resistor R111 is connected to the MCU controller's IO port, and the DN signal is connected to the port and the MCU controller. When no iPhone is connected, the MCU controller outputs a high level through the IO port. When an iPhone is connected, DN generates a low level. The MCU controller detects this signal and controls the charging chip to charge the iPhone.

[0019] like Figure 3 As shown, the present invention is identified by this circuit.

[0020] B2_D is the signal of the MCU's I / O port;

[0021] DN2_CTR is the signal of the MCU's I / O port;

[0022] DN2_CTR1 is the signal of the MCU's I / O port;

[0023] B2_DN is connected to the B2_DN pin of the terminal;

[0024] The working principle is as follows:

[0025] 1. When DN2_CTR is low and DN2_CTR1 is high, B2_DN is 0.6V.

[0026] 2. When DN2_CTR is high and DN2_CTR1 is low, B2_DN is 3.3V.

[0027] 3. When DN2_CTR is low, DN2_CTR1 is low, and B2_DN is 0V;

[0028] 4. The same applies to DP2_CTR / DP2_CTR1;

[0029] 5. At this time, the charging voltage levels for Apple phones are as follows (DM is B2_DN, DP is B2_DP).

[0030] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A control circuit for automatically detecting mobile phone charging via a charging cable, characterized by: The device comprises a charging management chip, an MCU controller, a charging interface, and a detection circuit. The signal output end of the charging interface is connected to the signal input end of the charging management chip and the signal input end of the detection circuit respectively. The signal output end of the charging management chip is connected to the input end of the MCU controller. The detection circuit is connected to the MCU controller. The detection circuit comprises a C - WAKE interface, resistor R111, resistor R142, diode D7, diode D8, resistor R107, resistor R141, DN1 signal terminal, DN2 signal terminal; C - The WAKE interface is connected to one end of the resistor R111, the other end of the resistor R111 is respectively connected to one end of the resistor R142, the anode of the diode D7, and the anode of the diode D8, the cathode of the diode D7 is connected to one end of the resistor R107, the other end of the resistor R107 is connected to the DN1 signal terminal, the cathode of the diode D8 is connected to one end of the resistor R141, and the other end of the resistor R141 is connected to the DN2 signal terminal.

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