Lightning switching Type-C bidirectional power supply circuit with communication handshake protocol

Abstract

The utility model discloses a Lightning switching Type-C bidirectional power supply circuit with a communication handshake protocol. The Lightning switching Type-C bidirectional power supply circuit comprises a communication handshake module, a charging switch module, a DC-DC boost module and a charging and discharging switching module. Compared with the prior art, the lighting device can be charged through a universal charger in the market, the lighting device can supply power to or communicate with an externally mounted device (microphone), the bidirectional power supply function is achieved, the data communication function and the fast charging function are achieved at the same time, and great convenience is brought to use of people.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply, in particular to a Lightning to Type-C bidirectional power supply circuit with a communication handshake protocol. Background Art

[0002] With the development of society, consumer electronic products are changing people's lives and entertainment methods. The mobile phone, microphone and related electronic components industries are on the rise, which has led to higher requirements for adapters.

[0003] Most Lightning to Type-C adapters currently on the market only offer one-way charging or data transfer for Lightning devices, failing to meet the needs for data transfer and bidirectional charging. Furthermore, USB chargers for Lightning devices require dedicated Lightning charging cables, making them inconvenient and incompatible. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model discloses a Lightning to Type-C bidirectional power supply circuit with a communication handshake protocol, including a communication handshake module, a charging switch module, a DC-DC boost module, and a charge-discharge switching module; the communication handshake module is respectively connected to the charging switch module, the DC-DC boost module, and the charge-discharge switching module; the DC-DC boost module is connected to the charge-discharge switching module;

[0005] The communication handshake module includes a communication protocol chip U1 and a lightning plug USB1-C; the charging switch module includes a P-channel MOS transistor Q7, an N-channel MOS transistor Q8, a resistor R9, and a resistor R10; the DC-DC boost module includes a boost chip U3, a resistor R12, and a resistor R13; the charge and discharge switching module includes a connection unit J1, a transistor Q1, a P-channel MOS transistor Q2, an N-channel MOS transistor Q3, an N-channel MOS transistor Q4, a P-channel MOS transistor Q5, a P-channel MOS transistor Q6, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, and a resistor R8.

[0006] As an optimal technical solution of the present invention, the communication protocol chip U1 port 1, port 2, and port 3 are respectively connected to the lightning plug USB1-C port 2, port 3, and port 5. The communication protocol chip U1 port 3 is connected to the diode D7 and then connected to port 4, and the other path is connected in series with the capacitor C2 and then grounded. The communication protocol chip U1 port 5 is connected to the charging switch module, and the communication protocol chip U1 port 6 is grounded; the lightning plug USB1-C port 1 is connected to the DC-DC boost module after being connected to the port 13, and the port 2, port 3, and port 5 are respectively connected to the port 15, port 14, and port 9. Port 4 is connected to the charging switch module, port 8 and port 16 are grounded, port 7 and port 10 are connected to the positive signal line, and port 6 and port 11 are connected to the negative signal line; the P-channel MOS tube Q7 S pole is connected to the lightning plug USB1-C port 4; the power input end is connected to the P-channel MOS tube Q7 D pole, one path is connected to the P-channel MOS tube Q7 S pole through the resistor R9, and one path is connected to the P-channel MOS tube Q7 through the resistor R10. G pole; the D pole of the N-channel MOS transistor Q8 is connected to the G pole of the P-channel MOS transistor Q7, the S pole is grounded, and the G pole is connected to the communication protocol chip U1 port 5; the port 1 of the boost chip U3 is connected to port 3 in series with a diode D6 and a resistor R13, and the other is connected to port 5 through the induction coil L1, port 2 is connected to port 4 through a capacitor C10, port 3 is grounded after passing through a resistor R12, and port 4 is connected to the lightning plug USB1-C port 1 after being connected to port 5. The negative pole of the diode D6 is grounded after passing through a capacitor C5, and the other is connected to the charge and discharge switching module; the output end of the DC-DC boost module is connected to the C pole of the transistor Q1 in series with a diode D1 and a resistor R1, and is connected to the D pole of the P-channel MOS transistor Q5, and is connected to the D pole of the N-channel MOS transistor Q3 through a resistor R4; the S pole of the P-channel MOS transistor Q5 is connected to the S pole of the P-channel MOS transistor Q6, and the G pole is connected to the D pole of the N-channel MOS transistor Q3; the N-channel MOS transistor Q3 The S-pole is connected to the C-pole of transistor Q1 via resistor R6, and the G-pole is connected to the G-pole of N-channel MOS transistor Q3 on one path and to the C-pole of transistor Q1 on the other. The D-pole of P-channel MOS transistor Q6 is connected to the D-pole of N-channel MOS transistor Q4 on one path via resistor R5, to the D-pole of P-channel MOS transistor Q2 on one path via fuse F1, to the cathode of diode D1 on one path via diode D2, and to the G-pole of N-channel MOS transistor Q4 on the other. The S-pole of N-channel MOS transistor Q4 is connected to the C-pole of transistor Q1 via resistor R7. The B-pole of transistor Q1 is connected to the cathodes of diodes D3 and D4 on one path via resistor R2, and to the E-pole on another path via resistor R8. The E-pole of transistor Q1 is grounded. The anodes of diodes D3 and D4 are connected to ports A5 and B5 of connection unit J1, respectively.The S-pole of the P-channel MOS transistor Q2 is connected to the positive power supply, the D-pole is connected to ports A4, A9, B4, and B9 of the connection unit J1, the G-pole is connected to the D-pole via resistor R3, and to the C-pole of the transistor Q1 via diode D5. Ports A1, A12, B1, and B12 of the connection unit J1 are grounded, ports A6 and B6 are connected to the positive signal, and ports A7 and B7 are connected to the negative signal.

[0007] As a preferred technical solution of the present invention, the S-pole of the N-channel MOS transistor Q3 and the S-pole of the N-channel MOS transistor Q4 are grounded.

[0008] As a preferred technical solution of the present invention, the output voltage of the boost chip U3 is 5V, and port 2 is grounded.

[0009] The beneficial effects of the present invention are as follows: the present invention can charge the lightning device through a common charger on the market, and can also allow the lightning device to power or communicate with an externally mounted device (microphone), thereby realizing a two-way power supply function and simultaneously realizing data communication and fast charging functions, which greatly facilitates people's use. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the specific embodiments or the description of the prior art. In all the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0011] Figure 1 This is the circuit diagram of the utility model;

[0012] Figure 2 This is the flow chart of the utility model:

[0013] Figure 3 This is the communication handshake circuit diagram of the utility model;

[0014] Figure 4 This is the circuit diagram of the charging switch of the utility model;

[0015] Figure 5 This is the DC-DC boost circuit diagram of the utility model;

[0016] Figure 6 This is the charge and discharge switching circuit diagram of the utility model; DETAILED DESCRIPTION

[0017] Example 1

[0018] like Figure 1 Only Figure 6As shown, the utility model discloses a Lightning to Type-C bidirectional power supply circuit with a communication handshake protocol, including a communication handshake module, a charging switch module, a DC-DC boost module, and a charge and discharge switching module; the communication handshake module includes a communication protocol chip U1 and a lightning plug USB1-C; the charging switch module includes a P-channel MOS tube Q7, an N-channel MOS tube Q8, a resistor R9, and a resistor R10; the DC-DC boost module includes a boost chip U3, a resistor R12, and a resistor R13; the charge and discharge switching module includes a connecting unit J1, a transistor Q1, a P-channel MOS tube Q2, an N-channel MOS tube Q3, an N-channel MOS tube Q4, a P-channel MOS tube Q5, a P-channel MOS tube Q6, resistors R1, R2, R3, R4, R5, R6, R7, and R8;

[0019] The communication protocol chip U1 port 1, port 2, and port 3 are respectively connected to the lightning plug USB1-C port 2, port 3, and port 5. The communication protocol chip U1 port 3 is connected to the diode D7 and then connected to port 4. The other path is connected in series with capacitor C2 and then grounded. The communication protocol chip U1 port 5 is connected to the charging switch module, and the communication protocol chip U1 port 6 is grounded; the lightning plug USB1-C port 1 is connected to the DC-DC boost module after being connected to the port 13, and the ports 2, 3, and 5 are respectively connected to the ports 15, 14, and 9. Port 4 is connected to the charging switch module, and ports 8 and 16 are grounded. Ports 7 and 10 are connected to the positive signal line, and ports 6 and 11 are connected to the negative signal line. The P-channel MOS transistor Q7 S pole is connected to the lightning plug USB1-C port 4; the power input end is connected to the P-channel MOS transistor Q7 D pole, one path is connected to the P-channel MOS transistor Q7 S pole through resistor R9, and one path is connected to the P-channel MOS transistor Q7 G pole through resistor R10; the N-channel MOS transistor Q8 The D pole is connected to the G pole of the P-channel MOS tube Q7, the S pole is grounded, and the G pole is connected to the port 5 of the communication protocol chip U1; the port 1 of the boost chip U3 is connected to the port 3 in series with a diode D6 and a resistor R13, and is connected to the port 5 through the induction coil L1. Port 2 is connected to the port 4 through the capacitor C10, and the port 3 is grounded after passing through the resistor R12. After the port 4 and port 5 are connected, they are connected to the lightning plug USB1-C port 1. The negative pole of the diode D6 is grounded after passing through the capacitor C5, and the other is connected to the charge and discharge switching module; the output end of the DC-DC boost module is connected to the C pole of the transistor Q1 through a diode D1 and a resistor R1 in series, one is connected to the D pole of the P-channel MOS tube Q5, and one is connected to the D pole of the N-channel MOS tube Q3 through a resistor R4; the S pole of the P-channel MOS tube Q5 is connected to the S pole of the P-channel MOS tube Q6, and the G pole is connected to the D pole of the N-channel MOS tube Q3; the S pole of the N-channel MOS tube Q3 is connected to the transistor Q1 through the resistor R6. The C and G poles are connected to the G pole of the N-channel MOS transistor Q3 in one path, and to the C pole of the transistor Q1 in another path; the D pole of the P-channel MOS transistor Q6 is connected to the D pole of the N-channel MOS transistor Q4 in one path through the resistor R5, to the D pole of the P-channel MOS transistor Q2 in one path through the fuse F1, to the cathode of the diode D1 in one path through the diode D2, and the G pole is connected to the D pole of the N-channel MOS transistor Q4; the S pole of the N-channel MOS transistor Q4 is connected to the C pole of the transistor Q1 in one path through the resistor R7; the B pole of the transistor Q1 is connected to the cathode of the diode D3 and the cathode of the diode D4 in one path through the resistor R2, and to the E pole in another path through the resistor R8. The E pole of the transistor Q1 is grounded; the anodes of the diodes D3 and D4 are connected to the A5 and B5 ports of the connection unit J1, respectively.The S-pole of the P-channel MOS transistor Q2 is connected to the positive power supply, the D-pole is connected to ports A4, A9, B4, and B9 of the connection unit J1, and the G-pole is connected to the D-pole via resistor R3 and to the C-pole of transistor Q1 via diode D5. Ports A1, A12, B1, and B12 of the connection unit J1 are grounded, ports A6 and B6 are connected to the positive signal, and ports A7 and B7 are connected to the negative signal. This allows Lightning devices to be charged using a common charger on the market, and also allows Lightning devices to power or communicate with external devices (microphones), achieving bidirectional power supply, data communication, and fast charging simultaneously, greatly facilitating user experience.

[0020] The working principle of this utility model is as follows:

[0021] When connected to an external charging device:

[0022] The voltages at CC1 and CC2 of the Type-C circuit are limited by diodes D3 and D4 and resistor R2 before being fed to Q1's B terminal, turning on Q1's CE terminal and lowering the voltage at Q1's C terminal. Q1's C terminal is connected to the G terminals of Q3 and Q4, lowering the gate (G) voltages of these two terminals and turning off their DS terminals. At this point, the voltages at Q3 and Q4's D terminals are high. The D terminals of Q3 and Q4 are connected to the G terminals of Q5 and Q6, also raising the G voltages of Q5 and Q6. Q5 and Q6 are P-channel MOS transistors, thus also turning off their DS terminals. This blocks the device's 5.0V power supply to external J2.

[0023] At the same time, when Q1's CE terminal is turned on, it pulls down the G terminal voltage of the P-channel MOS transistor Q2 through D5, turning on Q2's DS terminal. At this point, the 5th pin of the communication protocol chip U1 outputs a high voltage, which is connected to Q8's G terminal, turning on Q8's DS terminal. This pulls down the G terminal voltage of Q7, which is connected to Q8's D terminal, turning on Q7's DS terminal. At this point, the external voltage VB charges the Lightning device through Q2, Q7, and USB1-C, enabling external charging of Lightning devices.

[0024] When an external slave device is connected:

[0025] The CC1 and CC2 voltages of Type-C connector J1 are 0V. The voltage applied to Q1's B terminal through D3, D4, and R2 is also 0V, placing Q1's CE terminal in the off state. Consequently, the voltage at Q1's C terminal is high, and the gates (G terminals) of Q3 and Q4, connected to Q1's C terminal, are also high, turning on Q3 and Q4's DS terminals. At this point, the D terminals of Q3 and Q4 are low. The D terminals of Q3 and Q4 are connected to the G terminals of P-channel MOS transistors Q5 and Q6, turning on Q5 and Q6's DS terminals. This opens the path for the device to supply 5.0V power to the external J1.

[0026] At the same time, because Q1's CE terminal is off, the voltage at Q2's G terminal, connected via D5, is high, turning off the DS terminal of the P-channel MOS transistor Q2. At this point, the 5th pin of the communication protocol chip U1 outputs a high voltage, connected to Q8's G terminal, turning on Q8's DS terminal. This pulls down the voltage at Q7's G terminal, connected to Q8's D terminal, turning on Q7's DS terminal. Because Q2 is off, the external voltage VB cannot pass through Q2, thus preventing the external voltage VB from charging the Lightning device through Q2, Q7, and USB1-C.

[0027] The communication mechanism works as follows:

[0028] When the Lightning plug USB1-C is inserted into a Lightning device, the communication protocol chip U1 and the Lightning device shake hands and connect. After the connection is successful, the 5th pin of the communication protocol chip U1 outputs a high level. The 5th pin of the communication protocol chip U1 is connected to the G terminal of the N-channel MOS transistor Q8, making the G terminal level of Q8 high, thereby turning on the DS terminal of Q8. The D terminal of Q8 is connected to the G terminal of the P-channel MOS transistor Q7, and the S terminal is connected to GND. The conduction of the DS terminal of Q8 pulls down the D terminal voltage, thereby also lowering the G terminal voltage of Q7, turning on the DS terminal of Q7. The external power supply channel is opened, and the D+ / D- of USB1-C are connected to the D+ / D- of J1. The Lightning device communicates with the external device through this data line.

[0029] Components not described in detail herein are prior art.

[0030] Although the specific embodiments of the present invention are described in detail above, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by ordinary technicians in this field, various changes can be made without departing from the purpose of the present invention. Modifications or deformations that do not involve creative work are still within the scope of protection of the present invention.

Claims

1. A Lightning to Type-C bidirectional power supply circuit with a communication handshake protocol, characterized by: It includes a communication handshake module, a charging switch module, a DC-DC boost module, and a charge and discharge switching module; the communication handshake module is respectively connected to the charging switch module, the DC-DC boost module, and the charge and discharge switching module; the DC-DC boost module is connected to the charge and discharge switching module, and the communication handshake module includes a communication protocol chip U1 and a lightning plug USB1-C; the charging switch module includes a P-channel MOS transistor Q7, an N-channel MOS transistor Q8, a resistor R9, and a resistor R10; the DC-DC boost module includes a boost chip U3, a resistor R12, and a resistor R13; the charge and discharge switching module includes a connection unit J1, a transistor Q1, a P-channel MOS transistor Q2, an N-channel MOS transistor Q3, an N-channel MOS transistor Q4, a P-channel MOS transistor Q5, a P-channel MOS transistor Q6, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, and a resistor R8.

2. The Lightning to Type-C bidirectional power supply circuit with a communication handshake protocol according to claim 1, characterized in that: The communication protocol chip U1 port 1, port 2, and port 3 are connected to the lightning plug USB1-C port 2, port 3, and port 5 respectively. The communication protocol chip U1 port 3 is connected to the diode D7 and then connected to port 4. The other path is connected in series with the capacitor C2 and then grounded. The communication protocol chip U1 port 5 is connected to the charging switch module, and the communication protocol chip U1 port 6 is grounded. The lightning plug USB1-C port 1 is connected to the port 13 and then connected to the DC-DC boost module. Port 2, port 3, and port 5 are connected to the port 15, port 14, and port 9 respectively. Port 4 is connected to the charging switch module. Ports 8 and port 16 are grounded. Ports 7 and port 10 are connected to the positive signal line. Port 6 and port 11 are connected to the negative signal line; the P-channel MOS tube Q7S pole is connected to the lightning plug USB1-C port 4; the power input end is connected to the P-channel MOS tube Q7D pole, one path is connected to the P-channel MOS tube Q7S pole through resistor R9, and one path is connected to the P-channel MOS tube Q7G pole through resistor R10; the N-channel MOS tube Q8D pole is connected to the P-channel MOS tube Q7G pole, the S pole is grounded, and the G pole is connected to the communication protocol chip U1 port 5; the boost chip U3 port 1 is connected to port 3 in series with a diode D6 and a resistor R13, and the other path is connected to port 5 through the induction coil L1, port 2 is connected to port 4 through capacitor C10, and port 3 is connected to port 4 through resistor R 12 is grounded, port 4 and port 5 are connected and then connected to the lightning plug USB1-C port 1, the cathode of diode D6 is connected to ground through capacitor C5, and the other is connected to the charge and discharge switching module; the output end of the DC-DC boost module is connected in series with diode D1 and resistor R1 and then connected to the C pole of transistor Q1, one is connected to the D pole of P-channel MOS tube Q5, and one is connected to the D pole of N-channel MOS tube Q3 through resistor R4; the S pole of P-channel MOS tube Q5 is connected to the S pole of P-channel MOS tube Q6, and the G pole is connected to the D pole of N-channel MOS tube Q3; the S pole of N-channel MOS tube Q3 is connected to the C pole of transistor Q1 through resistor R6, and the G pole is connected to the N-channel MOS tube The G pole of Q3 is connected to the G pole of the transistor Q1, and the other pole is connected to the C pole of the transistor Q1. The D pole of the P-channel MOS transistor Q6 is connected to the D pole of the N-channel MOS transistor Q4 through a resistor R5, and is connected to the D pole of the P-channel MOS transistor Q2 through a fuse F1. It is connected to the cathode of the diode D1 through a diode D2, and the G pole is connected to the D pole of the N-channel MOS transistor Q4. The S pole of the N-channel MOS transistor Q4 is connected to the C pole of the transistor Q1 through a resistor R7. The B pole of the transistor Q1 is connected to the cathode of the diode D3 and the cathode of the diode D4 through a resistor R2, and is connected to the E pole through a resistor R8. The E pole of the transistor Q1 is grounded. The anodes of the diodes D3 and D4 are connected to ports A5 and B5 of the connection unit J1, respectively.The P-channel MOS transistor Q2 has its S-pole connected to the positive power supply, its D-pole connected to ports A4, A9, B4, and B9 of the connection unit J1, its G-pole connected to the D-pole via resistor R3, and its G-pole connected to the C-pole of the transistor Q1 via diode D5. Ports A1, A12, B1, and B12 of the connection unit J1 are grounded, while ports A6 and B6 are connected to positive signals, and ports A7 and B7 are connected to negative signals.

3. The Lightning to Type-C bidirectional power supply circuit with a communication handshake protocol according to claim 2, characterized in that: The S electrodes of the N-channel MOS transistor Q3 and the S electrodes of the N-channel MOS transistor Q4 are grounded.

4. The Lightning to Type-C bidirectional power supply circuit with a communication handshake protocol according to claim 2, characterized in that: The output voltage of the boost chip U3 is 5V, and port 2 is grounded.

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