Dual-output quick charger circuit

Abstract

The utility model relates to a dual-output quick charger circuit which comprises a USB-interface, an input protection circuit, a switching circuit, a master control module, a first DC / DC power control circuit, a second DC / DC power control circuit, an auxiliary control circuit, a first charging interface, a second charging interface and an LDO power supply circuit. A PB5 pin and a PB4 pin of the auxiliary control chip U401 are respectively connected with a PA11 pin and a PA12 pin of the main control chip U101 so as to feed back data to the main control chip U101; a PA10 pin of the auxiliary control chip U401 is connected with the first charging interface to identify the battery type of the first rechargeable battery, and a PF0 pin of the auxiliary control chip U401 is connected with the second charging interface to identify the battery type of the second rechargeable battery; data feedback is achieved, different charging modes are achieved through different battery types, and the charging efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fast charger circuits, in particular to a dual-output fast charger circuit. Background Art

[0002] As an AC-DC and strong-weak current conversion device, consumer power adapters need to adapt to various complex and harsh working environments and withstand various abnormal energy impacts that exceed the rated design specifications. At the same time, they need to provide stable output to ensure the use requirements of subsequent terminal equipment.

[0003] Therefore, the quality and reliability of power adapters have always been an important topic for power supply manufacturers to study and improve.

[0004] Existing power adapters are generally provided with dual-output fast charger circuits. However, there is a problem with existing dual-output fast charger circuits, which are unable to automatically adjust the output voltage according to the type of battery, and thus unable to adjust the charging efficiency.

[0005] Therefore, in the utility model patent application, the applicant carefully studied a dual-output fast charger circuit to solve the above problems. Utility Model Content

[0006] The utility model aims to overcome the deficiencies of the prior art and mainly aims to provide a dual-output fast charger circuit, which realizes data feedback and realizes different charging modes through different battery types to improve charging efficiency.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0008] A dual-output fast charger circuit includes a USB interface, an input protection circuit, a switch circuit, a main control module, a first DC / DC power control circuit, a second DC / DC power control circuit, an auxiliary control circuit for battery communication, a first charging interface for connecting to a first rechargeable battery, a second charging interface for connecting to a second rechargeable battery, and an LDO power supply circuit for power supply;

[0009] The input protection circuit is respectively connected to the USB interface, the LDO power supply circuit and the switch circuit, the switch circuit is respectively connected to the first DC / DC power control circuit and the second DC / DC power control circuit, the output end of the first DC / DC power control circuit is connected to the first charging interface, and the output end of the second DC / DC power control circuit is connected to the second charging interface.

[0010] The main control module includes a main control chip U101, the auxiliary control circuit includes an auxiliary control chip U401, the first DC / DC power control circuit includes a first power control chip U201, and the second DC / DC power control circuit includes a second power control chip U301;

[0011] The P16 pin of the main control chip U101 is connected to the switch circuit, and the SDA pin and SCL pin of the main control chip U101 are respectively connected to the PA12 pin and PA11 pin of the auxiliary control chip U401, the SDA pin and SCL pin of the first power control chip U201, and the SDA pin and SCL pin of the second power control chip U301 to respectively realize IIC communication connection with the auxiliary control chip U401, the first power control chip U201, and the second power control chip U301;

[0012] The PB5 pin and PB4 pin of the auxiliary control chip U401 are respectively connected to the PA11 pin and PA12 pin of the main control chip U101 to feed back data to the main control chip U101;

[0013] The PA10 pin of the auxiliary control chip U401 is connected to the first charging interface to identify the battery type of the first rechargeable battery, and the PF0 pin of the auxiliary control chip U401 is connected to the second charging interface to identify the battery type of the second rechargeable battery.

[0014] As a preferred solution, the auxiliary control circuit is also connected to an LED power and status display circuit.

[0015] As a preferred solution, the LED power and status display circuit includes six LED units, and the PA3 pin, PA4 pin, PA5 pin, PA6 pin, PA7 pin and PB0 pin of the auxiliary control chip U401 are respectively connected to an LED unit, and each LED unit includes a resistor and an LED lamp connected in series.

[0016] As a preferred solution, the LDO power supply circuit includes a chip U501, a diode D501, a capacitor C501 and a capacitor C502 connected in parallel, and a capacitor C503 and a capacitor C504 connected in parallel;

[0017] The positive pole of diode D501 is connected to the input protection circuit, the negative pole of diode D501 is connected to the Vin pin of chip U501, the Vin pin of chip U501 is grounded through capacitor C501, the GND of chip U501 is grounded, the Vout pin of chip U501 is grounded through capacitor C503, and the Vout pin of chip U501 is also used to output VDD voltage.

[0018] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, the PB5 pin and the PB4 pin of the auxiliary control chip U401 are respectively connected to the PA11 pin and the PA12 pin of the main control chip U101 to feed back data to the main control chip U101, thereby realizing data feedback. Moreover, the PA10 pin of the auxiliary control chip U401 is connected to the first charging interface to identify the battery type of the first rechargeable battery, and the PF0 pin of the auxiliary control chip U401 is connected to the second charging interface to identify the battery type of the second rechargeable battery, thereby realizing different charging methods through different battery types and improving charging efficiency.

[0019] In order to more clearly illustrate the structural features and effects of the present invention, it is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic circuit diagram of an embodiment of the utility model.

[0021] Description of Figure Numbers:

[0022] 11. USB interface 12. Input protection circuit

[0023] 13. Switching circuit

[0024] 20. Main control module

[0025] 30. First DC / DC power control circuit

[0026] 40. Second DC / DC power control circuit

[0027] 50. Auxiliary control circuit

[0028] 61. First charging port

[0029] 62. Second charging port

[0030] 70. LDO power supply circuit. DETAILED DESCRIPTION

[0031] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Please refer to Figure 1As shown, it shows the specific structure of the preferred embodiment of the utility model, which is a dual-output fast charger circuit, including a USB-interface 11, an input protection circuit 12, a switch circuit 13, a main control module 20, a first DC / DC power control circuit 30, a second DC / DC power control circuit 40, an auxiliary control circuit 50 for battery communication, a first charging interface 61 for connecting to a first rechargeable battery, a second charging interface 62 for connecting to a second rechargeable battery, and an LDO power supply circuit 70 for power supply;

[0033] The input protection circuit 12 is respectively connected to the USB interface 11, the LDO power supply circuit 70 and the switch circuit 13, and the switch circuit 13 is respectively connected to the first DC / DC power control circuit 30 and the second DC / DC power control circuit 40. The output end of the first DC / DC power control circuit 30 is connected to the first charging interface 61, and the output end of the second DC / DC power control circuit 40 is connected to the second charging interface 62.

[0034] The main control module 20 includes a main control chip U101, the auxiliary control circuit 50 includes an auxiliary control chip U401, the first DC / DC power control circuit 30 includes a first power control chip U201, and the second DC / DC power control circuit 40 includes a second power control chip U301;

[0035] The P16 pin of the main control chip U101 is connected to the switch circuit 13, and the SDA pin and SCL pin of the main control chip U101 are respectively connected to the PA12 pin and PA11 pin of the auxiliary control chip U401, the SDA pin and SCL pin of the first power control chip U201, and the SDA pin and SCL pin of the second power control chip U301 to respectively realize IIC communication connection with the auxiliary control chip U401, the first power control chip U201, and the second power control chip U301;

[0036] The PB5 pin and PB4 pin of the auxiliary control chip U401 are respectively connected to the PA11 pin and PA12 pin of the main control chip U101 to feed back data to the main control chip U101;

[0037] The PA10 pin of the auxiliary control chip U401 is connected to the first charging interface 61 to identify the battery type of the first rechargeable battery, and the PF0 pin of the auxiliary control chip U401 is connected to the second charging interface 62 to identify the battery type of the second rechargeable battery.

[0038] The auxiliary control circuit 50 is also connected to an LED power and status display circuit 80. Preferably, the LED power and status display circuit 80 includes six LED units, and the PA3 pin, PA4 pin, PA5 pin, PA6 pin, PA7 pin and PB0 pin of the auxiliary control chip U401 are respectively connected to an LED unit, and each LED unit includes a resistor and an LED lamp connected in series.

[0039] In this embodiment, the LDO power supply circuit 70 includes a chip U501, a diode D501, a capacitor C501 and a capacitor C502 connected in parallel, and a capacitor C503 and a capacitor C504 connected in parallel;

[0040] The positive pole of diode D501 is connected to input protection circuit 12, the negative pole of diode D501 is connected to Vin pin of chip U501, Vin pin of chip U501 is grounded through capacitor C501, GND of chip U501 is grounded, Vout pin of chip U501 is grounded through capacitor C503, and Vout pin of chip U501 is also used to output VDD voltage.

[0041] The key points of the design of the utility model are that the PB5 pin and the PB4 pin of the auxiliary control chip U401 are respectively connected to the PA11 pin and the PA12 pin of the main control chip U101 to feed back data to the main control chip U101, thereby realizing data feedback, and connecting the first charging interface through the PA10 pin of the auxiliary control chip U401 to identify the battery type of the first rechargeable battery, and the PF0 pin of the auxiliary control chip U401 to the second charging interface to identify the battery type of the second rechargeable battery, and then realizing different charging methods through different battery types to improve the charging efficiency.

[0042] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A dual output fast charger circuit, characterized in that: It includes a USB interface, an input protection circuit, a switch circuit, a main control module, a first DC / DC power control circuit, a second DC / DC power control circuit, an auxiliary control circuit for battery communication, a first charging interface for connecting to a first rechargeable battery, a second charging interface for connecting to a second rechargeable battery, and an LDO power supply circuit for power supply; The input protection circuit is respectively connected to the USB interface, the LDO power supply circuit and the switch circuit, the switch circuit is respectively connected to the first DC / DC power control circuit and the second DC / DC power control circuit, the output end of the first DC / DC power control circuit is connected to the first charging interface, and the output end of the second DC / DC power control circuit is connected to the second charging interface. The main control module includes a main control chip U101, the auxiliary control circuit includes an auxiliary control chip U401, the first DC / DC power control circuit includes a first power control chip U201, and the second DC / DC power control circuit includes a second power control chip U301; The P16 pin of the main control chip U101 is connected to the switch circuit, and the SDA pin and SCL pin of the main control chip U101 are respectively connected to the PA12 pin and PA11 pin of the auxiliary control chip U401, the SDA pin and SCL pin of the first power control chip U201, and the SDA pin and SCL pin of the second power control chip U301 to respectively realize IIC communication connection with the auxiliary control chip U401, the first power control chip U201, and the second power control chip U301; The PB5 pin and PB4 pin of the auxiliary control chip U401 are respectively connected to the PA11 pin and PA12 pin of the main control chip U101 to feed back data to the main control chip U101; The PA10 pin of the auxiliary control chip U401 is connected to the first charging interface to identify the battery type of the first rechargeable battery, and the PF0 pin of the auxiliary control chip U401 is connected to the second charging interface to identify the battery type of the second rechargeable battery.

2. The dual output fast charger circuit according to claim 1, characterized in that: The auxiliary control circuit is also connected to an LED power and status display circuit.

3. The dual output fast charger circuit according to claim 2, characterized in that: The LED power and status display circuit includes six LED units. The PA3 pin, PA4 pin, PA5 pin, PA6 pin, PA7 pin and PB0 pin of the auxiliary control chip U401 are respectively connected to an LED unit, and each LED unit includes a resistor and an LED lamp connected in series.

4. The dual output fast charger circuit according to claim 1, characterized in that: The LDO power supply circuit includes a chip U501, a diode D501, a capacitor C501 and a capacitor C502 connected in parallel, and a capacitor C503 and a capacitor C504 connected in parallel; The positive pole of diode D501 is connected to the input protection circuit, the negative pole of diode D501 is connected to the Vin pin of chip U501, the Vin pin of chip U501 is grounded through capacitor C501, the GND of chip U501 is grounded, the Vout pin of chip U501 is grounded through capacitor C503, and the Vout pin of chip U501 is also used to output VDD voltage.

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