Electric appliance identification circuit for charger

Abstract

The utility model discloses an electric appliance identification circuit used for a charger, comprising a TYPE-C interface P3 used as a main body, the left side of the TYPE-C interface P3 is provided with a master control circuit used for identifying equipment accessed to the TYPE-C interface P3, a processing circuit used for processing an electric signal input by the TYPE-C interface P3 is arranged between the TYPE-C interface P3 and the master control circuit, and the TYPE-C interface P3 is connected with the processing circuit. The output end of the TYPE-C interface P3 is electrically connected with the signal input end of the processing circuit, and the signal output end of the processing circuit is electrically connected with the signal input end of the master control circuit. According to the utility model, the disadvantage of few functions of the traditional electric appliance in the prior art is overcome. The utility model has the advantages of powerful function, quick response, high accuracy and the like.

Description

Technical Field

[0001] This utility model relates to the field of charging equipment, and more specifically, to an appliance identification circuit for a charger. Background Technology

[0002] A small-sized intelligent fast charger, publication number CN219760698U, is currently disclosed on the Chinese patent website. It includes a power conversion circuit and an intelligent charging identification circuit, which are electrically connected. The power conversion circuit includes an AC input terminal AC IN, a rectifier bridge BD1, a transformer TR1A, a power control chip IC2, a power transistor Q2, and a switching transistor Q1. The AC input terminal AC IN is electrically connected to the first input terminal of the transformer TR1A through the rectifier bridge BD1. The power supply terminal of the power control chip IC2 is electrically connected to the output terminal of the rectifier bridge BD1, and the gate of the power control chip IC2 is electrically connected to the gate of the power transistor Q2. This invention discloses a small-sized intelligent fast charger that effectively improves upon the large, low-power fixed chargers used in public places, meeting the fast charging needs of different devices.

[0003] The aforementioned patent describes a small-sized intelligent fast charger. While it boasts the advantage of small size, this charger has limited functionality. As society develops, people's demands for diverse charger functions are increasing, and traditional chargers can no longer meet these needs. Utility Model Content

[0004] In order to overcome the shortcomings of traditional electrical appliances with limited functions in the prior art, this utility model provides an electrical appliance identification circuit for a charger that has the function of identifying electrical appliances.

[0005] This utility model discloses an appliance identification circuit for a charger, comprising a TYPE-C interface P3 as the main body, a main control circuit for identifying devices connected to the TYPE-C interface P3 on the left side, a processing circuit for processing the electrical signals input to the TYPE-C interface P3 between the TYPE-C interface P3 and the main control circuit, the output terminal of the TYPE-C interface P3 being electrically connected to the signal input terminal of the processing circuit, and the signal output terminal of the processing circuit being electrically connected to the signal input terminal of the main control circuit.

[0006] Preferably, the main control circuit includes a main control chip U3, capacitors C41, C42, C43, C44, C49, C56, resistor R32, and resistor NTC1. Pin 2 of chip U3 is grounded. Pin 3 of chip U3 is electrically connected to one end of capacitor C49, and the other end of capacitor C49 is grounded. Pin 4 of chip U3 is electrically connected to pins 2 and 3 of chip U1 and one end of capacitor C41, and the other end of capacitor C41 is grounded. Pin 5 of chip U3 is electrically connected to one end of resistor R32. Pin 7 of chip U3 is electrically connected to one end of resistor NTC1. The other end of resistor R32 is electrically connected to the other end of resistor NTC1, and the other end of resistor NTC1 is grounded. Pin 10 of chip U3 is electrically connected to one end of capacitor C43, and the other end of capacitor C43 is grounded. Pin 13 of chip U3 is electrically connected to one end of capacitor C44, and the other end of capacitor C44 is grounded. Pin 14 of chip U3 is electrically connected to one end of capacitor C42, and the other end of capacitor C42 is grounded. Pin 16 of chip U3 is electrically connected to one end of capacitor C56, and the other end of capacitor C56 is grounded. Pin 33 of chip U3 is grounded.

[0007] Preferably, the processing circuit includes bidirectional trigger diodes ESD1, ESD2, ESD3, ESD4, and ESD8, a MOSFET Q4, detection terminals TP1, TP10, and TP11, resistors R34, R36, R37, and R38, and capacitors C20, C21, C23, C45, and C54. Pin 23 of chip U3 is electrically connected to one end of inductor L3 and one end of capacitor C46, ​​with the other end of capacitor C46 grounded. Pin 24 of chip U3 is electrically connected to one end of resistor R38, with the other end of resistor R38... The following terminals are electrically connected to one end of the bidirectional trigger diode ESD1, pin B7 of the TYPE-C interface P3, and pin A7 of the TYPE-C interface P3, respectively. Pin 25 of chip U3 is electrically connected to one end of resistor R37, and the other end of resistor R37 is electrically connected to one end of the bidirectional trigger diode ESD2, pin B6 of the TYPE-C interface P3, and pin A6 of the TYPE-C interface P3, respectively. Pin 26 of chip U3 is electrically connected to one end of capacitor C54, one end of the bidirectional trigger diode ESD3, and pin B5 of the TYPE-C interface P3, respectively. Pin 27 of chip U3 is electrically connected to one end of capacitor C20, one end of the bidirectional trigger diode ESD4, and pin A7 of the TYPE-C interface P3, respectively. Pin A5 of interface P3 is electrically connected. The other end of the bidirectional trigger diode ESD1 is electrically connected to the other ends of bidirectional trigger diodes ESD2, ESD3, and ESD4, respectively. The other end of bidirectional trigger diode ESD4 is grounded. Pin 28 of chip U3 is electrically connected to one end of capacitor C21, one end of capacitor C23, one end of bidirectional trigger diode ESD3, pin A5 of TYPE-C interface P3, pin B4 of TYPE-C interface P3, pin A9 of TYPE-C interface P3, pin B8 of TYPE-C interface P3, detection terminal TP1, and pin 1 of MOSFET Q4. Capacitor C5... The other end of capacitor C54 is electrically connected to the other ends of capacitors C20, C21, and C23, respectively. The other end of capacitor C54 is grounded. The other end of bidirectional trigger diode ESD3 is grounded. Pin 29 of chip U3 is electrically connected to pin 3 of MOSFET Q4. Pin 30 of chip U3 is electrically connected to pin 2 of MOSFET Q4, detection terminal TP11, and one end of resistor R36, respectively. Pin 31 of chip U3 is electrically connected to detection terminal TP10, the positive terminal of polarized capacitor EC6, the other end of resistor R36, and one end of resistor R34, respectively. Pin 32 of chip U3 is electrically connected to one end of resistor C45 and the other end of resistor R34, respectively.The other end of resistor C45 is grounded. Pin B1 of the TYPE-C interface P3 is electrically connected to pin A12 of the TYPE-C interface P3. Pin B1 of the TYPE-C interface P3 is grounded. Pin A1 of the TYPE-C interface P3 is electrically connected to pin B12 of the TYPE-C interface P3. Pin A1 of the TYPE-C interface P3 is grounded.

[0008] Before operation, install this utility model into the required charger and electrically connect the power supply terminal of the charger to one end of the resistor R34. Pins 8 and 9 of chip U3 can be used to program chip U3.

[0009] After installation, when a device is connected to the TYPE-C interface via a charging cable, chip U3, model SC2021, is a protocol identification chip. This chip can identify different smart electronic devices. Pins 19, 20, and 21 of chip U3 can be used to output feedback signals, allowing the charger to output the corresponding charging voltage according to the identified smart electronic device. It has wide applicability.

[0010] This invention has the following advantages: powerful functions, rapid response, and high accuracy. Attached Figure Description

[0011] Appendix Figure 1 This is a schematic diagram of the present invention.

[0012] Appendix Figure 2 This is a schematic diagram of the main control circuit of this utility model.

[0013] Appendix Figure 3 This is a schematic diagram of the processing circuit of this utility model. Detailed Implementation

[0014] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0015] Example: According to the appendix Figure 1 Appendix Figure 2 and attached Figure 3 To further illustrate this utility model, an appliance identification circuit for a charger, as described in this example, includes a TYPE-C interface P3 as the main body. A main control circuit for identifying devices connected to the TYPE-C interface P3 is provided on the left side of the TYPE-C interface P3. A processing circuit for processing the electrical signals input to the TYPE-C interface P3 is provided between the TYPE-C interface P3 and the main control circuit. The output terminal of the TYPE-C interface P3 is electrically connected to the signal input terminal of the processing circuit, and the signal output terminal of the processing circuit is electrically connected to the signal input terminal of the main control circuit.

[0016] The main control circuit includes a main control chip U3, capacitors C41, C42, C43, C44, C49, and C56, resistor R32, and resistor NTC1. Pin 2 of chip U3 is grounded. Pin 3 of chip U3 is electrically connected to one end of capacitor C49, and the other end of capacitor C49 is grounded. Pin 4 of chip U3 is electrically connected to pins 2 and 3 of chip U1 and one end of capacitor C41, and the other end of capacitor C41 is grounded. Pin 5 of chip U3 is electrically connected to one end of resistor R32. Pin 7 of chip U3 is electrically connected to one end of resistor NTC1. The other end of resistor R32 is electrically connected to the other end of resistor NTC1, and the other end of resistor NTC1 is grounded. Pin 10 of chip U3 is electrically connected to one end of capacitor C43, and the other end of capacitor C43 is grounded. Pin 13 of chip U3 is electrically connected to one end of capacitor C44, and the other end of capacitor C44 is grounded. Pin 14 of chip U3 is electrically connected to one end of capacitor C42, and the other end of capacitor C42 is grounded. Pin 16 of chip U3 is electrically connected to one end of capacitor C56, and the other end of capacitor C56 is grounded. Pin 33 of chip U3 is grounded.

[0017] The processing circuit includes bidirectional trigger diodes ESD1, ESD2, ESD3, ESD4, and ESD8, a MOSFET Q4, detection terminals TP1, TP10, and TP11, resistors R34, R36, R37, and R38, and capacitors C20, C21, C23, C45, and C54. Pin 23 of chip U3 is electrically connected to one end of inductor L3 and one end of capacitor C46, ​​with the other end of capacitor C46 grounded. Pin 24 of chip U3 is electrically connected to one end of resistor R38, and the other end of resistor R38 is connected to... One end of the bidirectional trigger diode ESD1 is electrically connected to pin B7 and pin A7 of the TYPE-C interface P3. Pin 25 of the chip U3 is electrically connected to one end of resistor R37. The other end of resistor R37 is electrically connected to one end of the bidirectional trigger diode ESD2, pin B6 and pin A6 of the TYPE-C interface P3. Pin 26 of the chip U3 is electrically connected to one end of capacitor C54, one end of the bidirectional trigger diode ESD3, and pin B5 of the TYPE-C interface P3. Pin 27 of the chip U3 is electrically connected to one end of capacitor C20, one end of the bidirectional trigger diode ESD4, and the TYPE-C interface P3. Pin A5 of P3 is electrically connected. The other end of the bidirectional trigger diode ESD1 is electrically connected to the other ends of bidirectional trigger diodes ESD2, ESD3, and ESD4, respectively. The other end of bidirectional trigger diode ESD4 is grounded. Pin 28 of chip U3 is electrically connected to one end of capacitor C21, one end of capacitor C23, one end of bidirectional trigger diode ESD3, pin A5 of TYPE-C interface P3, pin B4 of TYPE-C interface P3, pin A9 of TYPE-C interface P3, pin B8 of TYPE-C interface P3, detection terminal TP1, and pin 1 of MOSFET Q4. Capacitor C54... The other end of the capacitor is electrically connected to the other ends of capacitors C20, C21, and C23, respectively. The other end of capacitor C54 is grounded. The other end of bidirectional trigger diode ESD3 is grounded. Pin 29 of chip U3 is electrically connected to pin 3 of MOSFET Q4. Pin 30 of chip U3 is electrically connected to pin 2 of MOSFET Q4, detection terminal TP11, and one end of resistor R36, respectively. Pin 31 of chip U3 is electrically connected to detection terminal TP10, the positive terminal of polarized capacitor EC6, the other end of resistor R36, and one end of resistor R34, respectively. Pin 32 of chip U3 is electrically connected to one end of resistor C45 and the other end of resistor R34, respectively.The other end of resistor C45 is grounded. Pin B1 of the TYPE-C interface P3 is electrically connected to pin A12 of the TYPE-C interface P3. Pin B1 of the TYPE-C interface P3 is grounded. Pin A1 of the TYPE-C interface P3 is electrically connected to pin B12 of the TYPE-C interface P3. Pin A1 of the TYPE-C interface P3 is grounded.

[0018] The above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. An appliance identification circuit for a charger, comprising a TYPE-C interface as the main body, characterized in that, The left side of the TYPE-C interface P3 is provided with a main control circuit for identifying devices connected to the TYPE-C interface P3. Between the TYPE-C interface and the main control circuit, there is a processing circuit for processing the electrical signals input to the TYPE-C interface P3. The output terminal of the TYPE-C interface P3 is electrically connected to the signal input terminal of the processing circuit, and the signal output terminal of the processing circuit is electrically connected to the signal input terminal of the main control circuit.

2. The appliance identification circuit for a charger according to claim 1, characterized in that, The main control circuit includes a main control chip U3, capacitors C41, C42, C43, C44, C49, and C56, resistor R32, and resistor NTC1. Pin 2 of chip U3 is grounded. Pin 3 of chip U3 is electrically connected to one end of capacitor C49, and the other end of capacitor C49 is grounded. Pin 4 of chip U3 is electrically connected to pins 2 and 3 of chip U1 and one end of capacitor C41, and the other end of capacitor C41 is grounded. Pin 5 of chip U3 is electrically connected to one end of resistor R32. Pin 7 of chip U3 is electrically connected to one end of resistor NTC1. The other end of resistor R32 is electrically connected to the other end of resistor NTC1, and the other end of resistor NTC1 is grounded. Pin 10 of chip U3 is electrically connected to one end of capacitor C43, and the other end of capacitor C43 is grounded. Pin 13 of chip U3 is electrically connected to one end of capacitor C44, and the other end of capacitor C44 is grounded. Pin 14 of chip U3 is electrically connected to one end of capacitor C42, and the other end of capacitor C42 is grounded. Pin 16 of chip U3 is electrically connected to one end of capacitor C56, and the other end of capacitor C56 is grounded. Pin 33 of chip U3 is grounded.

3. The appliance identification circuit for a charger according to claim 2, characterized in that, The processing circuit includes bidirectional trigger diodes ESD1, ESD2, ESD3, ESD4, and ESD8, a MOSFET Q4, detection terminals TP1, TP10, and TP11, resistors R34, R36, R37, and R38, and capacitors C20, C21, C23, C45, and C54. Pin 23 of chip U3 is electrically connected to one end of inductor L3 and one end of capacitor C46, ​​with the other end of capacitor C46 grounded. Pin 24 of chip U3 is electrically connected to one end of resistor R38, and the other end of resistor R38 is connected to... One end of the bidirectional trigger diode ESD1 is electrically connected to pin B7 and pin A7 of the TYPE-C interface P3. Pin 25 of the chip U3 is electrically connected to one end of resistor R37. The other end of resistor R37 is electrically connected to one end of the bidirectional trigger diode ESD2, pin B6 and pin A6 of the TYPE-C interface P3. Pin 26 of the chip U3 is electrically connected to one end of capacitor C54, one end of the bidirectional trigger diode ESD3, and pin B5 of the TYPE-C interface P3. Pin 27 of the chip U3 is electrically connected to one end of capacitor C20, one end of the bidirectional trigger diode ESD4, and the TYPE-C interface P3. Pin A5 of P3 is electrically connected. The other end of the bidirectional trigger diode ESD1 is electrically connected to the other ends of bidirectional trigger diodes ESD2, ESD3, and ESD4, respectively. The other end of bidirectional trigger diode ESD4 is grounded. Pin 28 of chip U3 is electrically connected to one end of capacitor C21, one end of capacitor C23, one end of bidirectional trigger diode ESD3, pin A5 of TYPE-C interface P3, pin B4 of TYPE-C interface P3, pin A9 of TYPE-C interface P3, pin B8 of TYPE-C interface P3, detection terminal TP1, and pin 1 of MOSFET Q4. Capacitor C54... The other end of the capacitor is electrically connected to the other ends of capacitors C20, C21, and C23, respectively. The other end of capacitor C54 is grounded. The other end of bidirectional trigger diode ESD3 is grounded. Pin 29 of chip U3 is electrically connected to pin 3 of MOSFET Q4. Pin 30 of chip U3 is electrically connected to pin 2 of MOSFET Q4, detection terminal TP11, and one end of resistor R36, respectively. Pin 31 of chip U3 is electrically connected to detection terminal TP10, the positive terminal of polarized capacitor EC6, the other end of resistor R36, and one end of resistor R34, respectively. Pin 32 of chip U3 is electrically connected to one end of resistor C45 and the other end of resistor R34, respectively.The other end of resistor C45 is grounded. Pin B1 of the TYPE-C interface P3 is electrically connected to pin A12 of the TYPE-C interface P3. Pin B1 of the TYPE-C interface P3 is grounded. Pin A1 of the TYPE-C interface P3 is electrically connected to pin B12 of the TYPE-C interface P3. Pin A1 of the TYPE-C interface P3 is grounded.

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