CN211720282U

CN211720282U - Charging control circuit and electronic equipment

Info

Publication number: CN211720282U
Application number: CN202020086938.0U
Authority: CN
Inventors: 丁康
Original assignee: Wingtech Communication Co Ltd
Current assignee: Wingtech Communication Co Ltd
Priority date: 2020-01-16
Filing date: 2020-01-16
Publication date: 2020-10-20
Anticipated expiration: 2030-01-16

Abstract

The utility model provides a charging control circuit, which is applied to electronic equipment, wherein the electronic equipment comprises a charging port and an expansion port; the charging control circuit comprises a first power switch and a second power switch; a first input pin of the first power switch is connected with the charging port, and a first output pin of the first power switch is used for connecting a charging chip in the electronic equipment; a second input pin of the second power switch is connected with the expansion port, and a second output pin of the second power switch is connected with the first output pin; the first state pin of the first power switch is connected with the second enabling pin of the second power switch. The utility model also provides an electronic equipment. The utility model provides a charge control circuit and electronic equipment has realized that electronic equipment can charge through two ports to the break-make according to two power switch realizes two free configurations of charging path, and the charge mode is simple, can deal with complicated scene of charging, has improved and has used the convenience.

Description

Charging control circuit and electronic equipment

[ technical field ] A method for producing a semiconductor device

The utility model relates to a technical field that charges especially relates to a charge control circuit and electronic equipment.

[ background of the invention ]

At present, electronic equipment such as a mobile phone generally has only one charging port for power transmission, and the charging port can be used for charging the electronic equipment by connecting a power adapter, and also can be used for charging by connecting a portable charging device (such as a charger).

Therefore, there is a need to provide a novel charge control circuit and an electronic device to overcome the above-mentioned drawbacks.

[ Utility model ] content

The utility model aims at providing a charge mode is simple, can deal with the complicated scene of charging, improve charge control circuit and the electronic equipment who uses the convenience.

In order to achieve the above object, the present invention provides a charging control circuit, which is applied to an electronic device, wherein the electronic device includes a charging port and an expansion port; the charging control circuit comprises a first power switch and a second power switch; a first input pin of the first power switch is connected with the charging port, and a first output pin of the first power switch is used for connecting a charging chip in the electronic equipment; a second input pin of the second power switch is connected with the expansion port, and a second output pin of the second power switch is connected with the first output pin; and the first state pin of the first power switch is connected with the second enabling pin of the second power switch.

In a preferred embodiment, a first switch module is further connected to a second enable pin of the second power switch, a second switch module is further connected to a second flag pin of the second power switch, and the first switch module and the second switch module are used for connecting a control module in the electronic device.

In a preferred embodiment, the first switch module includes a first MOS transistor, a G pole of the first MOS transistor is used for connecting the control module, a D pole of the first MOS transistor is connected to the second enable pin, and an S pole of the first MOS transistor is grounded; the second switch module comprises a second MOS tube, the G pole of the second MOS tube is used for being connected with the control module, the D pole of the second MOS tube is connected with the second mark pin, and the S pole of the second MOS tube is grounded.

In a preferred embodiment, a first resistor is further connected to the first enable pin of the first power switch.

In a preferred embodiment, the first input pin is further connected with a first voltage stabilizing diode and a capacitor; the first output pin is further connected with a second voltage stabilizing diode and a capacitor.

In a preferred embodiment, the second input pin is further connected with a third zener diode and a capacitor; and the second output pin is also connected with a capacitor.

In a preferred embodiment, the first flag pin of the first power switch is further connected to a third switch module, and the third switch module is used for being connected to the control module.

In a preferred embodiment, the third switch module includes a third MOS transistor, a G-pole of the third MOS transistor is used for connecting the control module, a D-pole of the third MOS transistor is connected to the first flag pin, and an S-pole of the third MOS transistor is grounded.

In a preferred embodiment, the first MOS transistor, the second MOS transistor, and the third MOS transistor are all N-type MOS transistors.

The utility model also provides an electronic equipment, including above-mentioned any one embodiment the control circuit that charges.

Compared with the prior art, the charging control circuit and the electronic equipment provided by the utility model have the advantages that when the charging port is connected with the charging power supply through the charging wire and the expansion port is not connected with the external power supply equipment, the charging power supply charges the charging chip in the electronic equipment through the charging wire, the charging port and the first power switch; when the expansion port is connected with the external power supply equipment and the charging port is not connected with the charging power supply, the external power supply equipment charges a charging chip in the electronic equipment through the expansion port and the second power switch; when the charging port is connected with a charging source through a charging wire and the expansion port is connected with external power supply equipment, the first state pin of the first power switch outputs a high level, the second enabling pin of the second power switch is the high level, the second power switch is turned off, the charging source charges a charging chip in the electronic equipment through the charging wire, the charging port and the first power switch, and the turning off of the second power switch is not controlled by software. The electronic equipment can be charged through the two ports (the charging port and the expansion port), the two power switches (the first power switch and the second power switch) are configured, the two charging paths can be freely configured according to the on-off of the two power switches, the charging mode is simple, the complex charging scene can be dealt with, and the use convenience is improved.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a circuit diagram of a charge control circuit according to the present invention;

fig. 2 is a schematic structural diagram of the electronic device provided by the present invention.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 and fig. 2 together, fig. 1 is a circuit diagram of a charging control circuit 100 according to the present invention; fig. 2 is a schematic structural diagram of an electronic device 200 according to the present invention. The utility model provides a charge control circuit 100 is applied to electronic equipment 200, and electronic equipment 200 can be for example portable intelligent terminal such as cell-phone, and electronic equipment 200 includes charging port 201 and expansion port 202, and expansion port 202 is used for connecting external power supply equipment CHGIN in order to realize that external power supply equipment CHGIN charges for electronic equipment 200 through expansion port 202; the charge control circuit 100 includes a first power switch U1 and a second power switch U2.

A first input pin USBIN1 of the first power switch U1 is connected with the charging port 201, and a first output pin OUT1 of the first power switch U1 is used for connecting a charging chip in the electronic device 200; the second input pin USBIN2 of the second power switch U2 is connected with the expansion port 202, and the second output pin OUT2 of the second power switch U2 is connected with the first output pin OUT 1; the first state pin WRX _ N1 of the first power switch U1 is connected to the second enable pin EN _ N2 of the second power switch U2.

The utility model provides a charging control circuit 100, when charging port 201 connects charging source VBUS through the charging wire and expansion port 202 is not connected external power source equipment CHGIN, charging source VBUS charges for the charging chip in electronic equipment 200 through charging wire, charging port 201 and first power switch U1; when the expansion port 202 is connected to the external power supply device CHGIN and the charging port 201 is not connected to the charging power supply VBUS, the external power supply device CHGIN charges a charging chip in the electronic device 200 through the expansion port 202 and the second power switch U2; when the charging port 201 is connected to the charging source VBUS through a charging line and the expansion port 202 is connected to the external power supply device CHGIN, the first state pin WRX _ N1 of the first power switch U1 outputs a high level, the second enable pin EN _ N2 of the second power switch U2 is a high level, and the second power switch U2 is turned off, the charging source VBUS charges a charging chip in the electronic device 200 through the charging line, the charging port 201 and the first power switch U1, and the turning off of the second power switch U2 does not need software control. That is, the electronic device 200 can be charged through two ports (the charging port 201 and the expansion port 202), two power switches (the first power switch U1 and the second power switch U2) are arranged, two charging paths are freely arranged according to the on/off of the two power switches, the charging mode is simple, the device can cope with a complicated charging scene, and the use convenience is improved. In the present embodiment, the first power switch U1 and the second power switch U2 are both OVP (overvoltage protection) chips.

Specifically, the charging port 201 is a USB (Universal Serial Bus) interface, the charging port 201 is located at the bottom of the electronic device 200, and the charging port 201 can be connected to a charging line and an adapter, and further connected to a charging power supply VBUS; the expansion port 202 is a connector, which may be disposed on the rear case 203 of the electronic device 200, and the connector is connected to a charging bus inside the electronic device 200, so that when the connector is connected to the external power supply device CHGIN, the external power supply device CHGIN can charge the electronic device 200. It can be understood that the external power supply device may be, for example, a portable energy storage device such as a back-clip battery; the charging chip in the electronic device 200 may be, for example, a PMIC (Power Management IC).

Further, a first switch module 10 is further connected to a second enable pin EN _ N2 of the second power switch U2, a second FLAG pin FLAG _ N2 of the second power switch U2 is further connected to a second switch module 20, and the first switch module 10 and the second switch module 20 are used for connecting a control module in an electronic device. It is understood that the control module of the electronic device 200 is, for example, an AP (application processor) for sending a control signal.

When the charging port 201 is connected to the charging source VBUS through a charging line and the expansion port 202 is connected to the external power source device CHGIN, the charging source VBUS charges a charging chip in the electronic device 200 through the charging line, the charging port 201 and the first power switch U1, meanwhile, the electronic device 200 obtains the power information of the external power source device CHGIN connected to the expansion port 202 through the expansion port 202, when the power of the external power source device CHGIN is lower than a preset threshold, the control module of the electronic device sends a control signal to the first switch module 10 and the second switch module 20 to further communicate with the first switch module 10 and the second switch module 20, so that the second enable pin EN _ N2 of the second power switch U2 is at a low level and the second FLAG pin FLAG _ N2 is also at a low level, the second power switch U2 is turned on in a reverse direction, and the charging source VBUS can charge the external power source device CHGIN through the first power switch U1 and the second power switch U2, charging source VBUS can be through charging port 201 simultaneously for electronic equipment 200 and external power source equipment CHGIN charge promptly, also can realize electronic equipment 200 and external power source equipment CHGIN through an adapter and a charging wire and charge, has improved the use convenience, and circuit element is simple, easily realizes, and the cost is lower. It can be understood that the preset threshold may be set according to actual requirements, for example, 10%, that is, when the power of the external power supply device CHGIN is lower than 10%, the charging power source VBUS can charge the electronic device 200 and the external power supply device CHGIN simultaneously through the charging port 201.

The first switch module 10 comprises a first MOS transistor Q1, a G pole of the first MOS transistor Q1 is used for connecting the control module, a D pole of the first MOS transistor Q1 is connected to the second enable pin EN _ N2, and an S pole of the first MOS transistor Q1 is grounded; the second switch module 20 includes a second MOS transistor Q2, a G-pole of the second MOS transistor Q2 is connected to the control module, a D-pole of the second MOS transistor Q2 is connected to the second FLAG pin FLAG _ N2, and an S-pole of the second MOS transistor Q2 is grounded. Specifically, the control module sends a control signal to the first MOS transistor Q1 and the second MOS transistor Q2, in this embodiment, the control signal is a high level signal, the first MOS transistor Q1 and the second MOS transistor Q2 are both N-type MOS transistors, and when the first MOS transistor Q1 and the second MOS transistor Q2 receive the control signal and are at a high level, the first MOS transistor Q1 and the second MOS transistor Q2 are turned on, and then the second enable pin EN _ N2 is pulled down to be at a low level and the second FLAG pin FLAG _ N2, so that the second power switch U2 is turned on reversely, and the charging source VBUS can charge the external power device CHGIN through the first power switch U1 and the second power switch U2, that is, the charging source VBUS can charge the electronic device 200 and the external power device CHGIN through the charging port 201 at the same time.

In this embodiment, the first resistor R1 is further connected to the first enable pin EN _ N1 of the first power switch U1, and it can be understood that the first enable pin EN _ N1 of the first power switch U1 and the first enable pin EN _ N2 of the second power switch U2 are both active at low level.

Specifically, the first input pin USBIN1 is further connected to a first zener diode D1 and a capacitor, the number of the capacitors is three, and the capacitors include a first capacitor C1, a second capacitor C2 and a third capacitor C3, the first zener diode D1, the first capacitor C1, the second capacitor C2 and the third capacitor C3 are used for stabilizing the voltage of the first input pin USBIN1 and filtering noise of the circuit. The first output pin OUT1 is further connected with a second zener diode D2 and a capacitor, the number of the capacitors is two, and the capacitors include a fourth capacitor C4 and a fifth capacitor C5, the second zener diode D2, the fourth capacitor C4 and the fifth capacitor C5 are used for stabilizing the voltage of the first output pin OUT1 and filtering noise of the circuit, in this embodiment, the size of the fourth capacitor C4 is 0.1 μ F, and the size of the fifth capacitor C5 is 1000 pF.

Specifically, the second input pin USBIN2 is further connected to a third zener diode D3 and a capacitor, the capacitor includes a sixth capacitor C6, and the third zener diode D3 and the sixth capacitor C6 are used to stabilize the voltage of the second input pin USBIN2 and filter noise of the circuit, in this embodiment, the size of the sixth capacitor C6 is 1.0 μ F. The second output pin OUT2 is further connected with a capacitor, the capacitor includes a seventh capacitor C7, the seventh capacitor C7 is used for stabilizing the voltage of the second output pin OUT2, and the noise of the filtering circuit is filtered OUT, in this embodiment, the size of the seventh capacitor C7 is 100 pF.

Further, a first FLAG pin FLAG _ N1 of The first power switch U1 is further connected to a third switch module 30, and The third switch module 30 is used to connect to The control module, and is used to implement an OTG (On-The-Go, available On The security) function of The charging port 201, so as to ensure connection between different devices and electronic devices, thereby implementing data exchange and extending The storage capacity of The electronic devices. Specifically, the third switching module 30 is a third MOS transistor Q3, a G-pole of the third MOS transistor Q3 is used for connecting the control module, a D-pole of the third MOS transistor Q3 is connected to the first FLAG pin FLAG _ N1, and an S-pole of the third MOS transistor Q3 is grounded; the third MOS transistor Q3 is an N-type MOS transistor.

The utility model provides an electronic equipment 200, including any one of the above-mentioned embodiments charge control circuit 100, it is concrete, electronic equipment 200 includes charging port 201 and expansion port 202, charging port 201 is connected to charging control circuit 100's first input pin USBIN1 of first power switch U1, expansion port 202 is connected to second input pin USBIN2 of second power switch U2. It can be appreciated that all embodiments of the charging control circuit 100 provided by the present invention are applicable to the electronic device 200 provided by the present invention, and can achieve the same or similar beneficial effects.

To sum up, the utility model provides a charging control circuit 100 and electronic equipment 200, when charging port 201 connects charging source VBUS through the charging wire and expansion port 202 is not connected external power source equipment CHGIN, charging source VBUS charges for the charging chip in electronic equipment 200 through charging wire, charging port 201 and first power switch U1; when the expansion port 202 is connected to the external power supply device and the charging port 201 is not connected to the charging power supply VBUS, the external power supply device CHGIN charges a charging chip in the electronic device 200 through the expansion port 202 and the second power switch U2; when the charging port 201 is connected to the charging source VBUS through a charging line and the expansion port 202 is connected to the external power supply device CHGIN, the first state pin WRX _ N1 of the first power switch U1 outputs a high level, the second enable pin EN _ N2 of the second power switch U2 is a high level, and the second power switch U2 is turned off, the charging source VBUS charges a charging chip in the electronic device 200 through the charging line, the charging port 201 and the first power switch U1, and the turning off of the second power switch U2 does not need software control. That is, the electronic device 200 can be charged through two ports (the charging port 201 and the expansion port 202), two power switches (the first power switch U1 and the second power switch U2) are arranged, two charging paths are freely arranged according to the on/off of the two power switches, the charging mode is simple, the device can cope with a complicated charging scene, and the use convenience is improved.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A charging control circuit is applied to electronic equipment, and is characterized in that the electronic equipment comprises a charging port and an expansion port; the charging control circuit comprises a first power switch and a second power switch; a first input pin of the first power switch is connected with the charging port, and a first output pin of the first power switch is used for connecting a charging chip in the electronic equipment; a second input pin of the second power switch is connected with the expansion port, and a second output pin of the second power switch is connected with the first output pin; and the first state pin of the first power switch is connected with the second enabling pin of the second power switch.

2. The charging control circuit of claim 1, wherein a first switch module is further connected to the second enable pin of the second power switch, a second switch module is further connected to the second flag pin of the second power switch, and the first switch module and the second switch module are used for connecting a control module in the electronic device.

3. The charge control circuit according to claim 2, wherein the first switch module comprises a first MOS transistor, a G pole of the first MOS transistor is used for connecting the control module, a D pole of the first MOS transistor is connected to the second enable pin, and an S pole of the first MOS transistor is grounded; the second switch module comprises a second MOS tube, the G pole of the second MOS tube is used for being connected with the control module, the D pole of the second MOS tube is connected with the second mark pin, and the S pole of the second MOS tube is grounded.

4. The charge control circuit of claim 3, wherein a first resistor is further connected to the first enable pin of the first power switch.

5. The charge control circuit according to claim 4, wherein the first input pin is further connected with a first voltage regulator diode and a capacitor; the first output pin is further connected with a second voltage stabilizing diode and a capacitor.

6. The charge control circuit according to claim 5, wherein a third zener diode and a capacitor are further connected to the second input pin; and the second output pin is also connected with a capacitor.

7. The charge control circuit of claim 3, wherein a third switch module is further connected to the first flag pin of the first power switch, and the third switch module is used for connecting the control module.

8. The charge control circuit according to claim 7, wherein the third switching module comprises a third MOS transistor, a G-pole of the third MOS transistor is used for connecting the control module, a D-pole of the third MOS transistor is connected to the first flag pin, and an S-pole of the third MOS transistor is grounded.

9. The charge control circuit of claim 8, wherein the first MOS transistor, the second MOS transistor and the third MOS transistor are all N-type MOS transistors.

10. An electronic device characterized by comprising the charge control circuit according to any one of claims 1 to 9.