CN209948727U - Charging circuit - Google Patents

Abstract

The utility model belongs to the technical field of charging, and discloses a charging circuit, comprising a charging port circuit; a control circuit, wherein the control circuit comprises a first MCU module and a first switch circuit; the first MCU module is connected to a charging port circuit connection, and the first MCU module obtains the connection signal of the external charging device from the charging port circuit, and outputs it to the lower-level circuit through the first switch circuit after processing.

Description

a charging circuit

technical field

The utility model belongs to the technical field of charging, in particular to a charging circuit.

Background technique

With the popularity of smart phones in the market and the short standby time of smart phones, the number of charging devices for mobile phones is also increasing, and the types of smart phone brands are also increasing. The brand mobile phone has set a charging protocol, so it is difficult to charge the mobile phone if it does not meet the charging protocol; this hinders the development of the wireless charging field, and the slow charging speed of wireless charging is also a common problem in the industry, so changing the charging method Speed is also necessary.

Utility model content

The purpose of the present invention is to provide a charging circuit to solve the problem of slow charging speed of wireless charging due to the charging protocol set for the brand mobile phone proposed in the above-mentioned background art.

In order to achieve the above purpose, the utility model provides the following technical solutions: a charging circuit, comprising,

charging port circuit;

a control circuit, the control circuit includes a first MCU module and a first switch circuit; the first MCU module is connected to a charging port circuit, and the first MCU module obtains a connection signal of an external charging device from the charging port circuit , after processing, it is output to the lower circuit through the first switch circuit;

a power management circuit; the power management circuit includes a power supply, a booster circuit, a second MCU module, and a second switch circuit; an input end of the booster circuit is connected to a power supply, and an output end of the booster circuit, a second switch circuit The output of a switch circuit is connected to the corresponding input terminal of the second MCU module, and the output of the second MCU module is connected to the charging port circuit and the lower-level circuit through the second switch circuit;

A wireless charging circuit, the input end of the wireless charging circuit is connected with the input end of the second switch circuit, and the output end of the wireless charging circuit is connected with the sending coil.

Preferably, the first MCU module includes an ES7P003 chip and its peripheral circuits; the corresponding input end of the ES7P003 chip is electrically connected to the charging port circuit, and the corresponding output end of the ES7P003 chip is connected to the first switch circuit and the second MCU. The corresponding ports of the modules are electrically connected.

Preferably, the first switch circuit is set as the SGM3002 chip and its peripheral circuits; the input terminal corresponding to the SGM3002 chip is electrically connected to the output terminal corresponding to the ES7P003 chip, and the output terminal corresponding to the SGM3002 chip is connected to the second MCU module. The corresponding terminals are electrically connected.

Preferably, the booster circuit includes a first booster circuit and a second booster circuit; the first booster circuit is provided with an energy storage inductor, and the second booster circuit includes a circuit composed of a plurality of energy storage capacitors ; The first boost circuit is connected to the power supply and the corresponding input terminals of the second MCU module, respectively, and the second boost circuit is connected to the corresponding output terminal of the second MCU module.

Preferably, the second MCU module includes a QFN40 chip and its peripheral circuits; the corresponding input end of the QFN40 chip is electrically connected to the energy storage inductor and the output end corresponding to the SGM3002 chip; the corresponding output end of the QFN40 chip is connected through a plurality of The common terminal of the energy storage capacitor is electrically connected to the charging port circuit and the wireless charging circuit respectively.

Preferably, the second switch circuit includes a plurality of SOT23-6 chips and their peripheral circuits; an input end of the SOT23-6 chip is electrically connected to an output end corresponding to the QFN40 chip through the common end of the plurality of energy storage capacitors connected, the output ends of the plurality of SOT23-6 chips are correspondingly electrically connected with the charging port circuit and the wireless charging circuit.

Preferably, the wireless charging circuit includes a wireless transmitting circuit, a main control circuit, and a protocol decoy circuit; the corresponding input end of the wireless transmitting circuit is electrically connected to the output end of one of the SOT23-6 chips and the output end corresponding to the main control circuit. The corresponding input end of the main control circuit is connected with the output end of the protocol decoy circuit; the input end of the protocol decoy circuit is electrically connected with the charging port circuit.

Preferably, the main control circuit is set as an MCU chip and its peripheral circuits, and the protocol decoy circuit is set as a circuit composed of a plurality of resistors.

The charging port circuit is connected to an external charged unit or power source; and after the charging port circuit is connected to an external charged unit or power source, the signal is transmitted to the corresponding input end of the first MCU module through the first switch circuit, and the first The output end of an MCU module is discharged or charged after being processed by the subordinate circuit.

Compared with the prior art, the beneficial effects of the present utility model are:

(1) The "protocol decoy circuit" of the present utility model deceives 5V or 9V of the QC from the power supply through the charging port circuit, the second switch circuit and the QFN40 chip; "Convert the input DC 5V or 9V into high-frequency alternating current, so as to generate a magnetic field on the coil, and then transfer the energy to the external charging device (mobile phone) through the principle of electromagnetic induction; this design method is not in line with Apple mobile phone charging. Under the conditions of the agreement, wireless charging of Apple mobile phones can be carried out, and it is also convenient for wireless charging of Android mobile phones.

(2) The power supply (battery) of the utility model charges the external charging unit (mobile phone) through the booster circuit, the QFN40 chip, the second switch circuit and the charging terminal circuit, or through the charging terminal circuit, the second switch The circuit, QFN40 chip, and chip boost circuit are used to charge the power supply. This design method is convenient for charging the external charging unit (mobile phone), and it is also convenient for the power supply (battery) to be charged through the charging port circuit when the power supply (battery) is insufficient. Therefore, the utility model patent has the beneficial effects of multifunctional charging mode, convenient charging and fast charging speed.

Description of drawings

1 is a schematic diagram of a charging port circuit of the present invention;

Fig. 2 is the control circuit principle diagram of the utility model;

3 is a schematic diagram of a power management circuit of the present invention;

FIG. 4 is a schematic diagram of a wireless charging circuit of the present invention.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to FIG. 1-FIG. 4, the present utility model provides a technical solution: a charging circuit, comprising;

charging port circuit 3;

Control circuit 2, the control circuit 2 includes a first MCU module 22 and a first switch circuit 21; the first MCU module 22 is connected to the charging port circuit 3, and the first MCU module 22 is connected from the charging port circuit 3. Obtain the connection signal of the external charging device, and output it to the lower-level circuit through the first switch circuit 21 after processing;

A power management circuit 1; the power management circuit 1 includes a power source 11, a booster circuit, a second MCU module 15, and a second switch circuit 14; an input end of the booster circuit is connected to the power source 11, and the booster circuit The output terminal of the circuit and the output of the first switch circuit 21 are connected to the corresponding input terminal of the second MCU module 15, and the output of the second MCU module 15 is connected to the charging port circuit 3 and the lower-level circuit through the second switch circuit 14;

The wireless charging circuit 4, the input end of the wireless charging circuit 4 is connected to the input end of the second switch circuit 14, and the output end of the wireless charging circuit 4 is connected to the sending coil.

The first MCU module 22 includes an ES7P003 chip and its peripheral circuits; the corresponding input end of the ES7P003 chip is electrically connected to the charging port circuit 3, and the corresponding output end of the ES7P003 chip is connected to the first switch circuit 21 and the second MCU. The corresponding ports of the module 15 are electrically connected; the peripheral circuit of the ES7P003 chip is set as a circuit composed of 4 LED lights and a plurality of electric groups, and the 4 LED lights are used to display the power of the power supply 11 (battery).

The first switch circuit 21 is set as the SGM3002 chip and its peripheral circuits; the input terminal corresponding to the SGM3002 chip is electrically connected to the output terminal corresponding to the ES7P003 chip, and the output terminal corresponding to the SGM3002 chip corresponds to the second MCU module 15 . Terminal electrical connection.

The booster circuit includes a first booster circuit 12 and a second booster circuit 13; the first booster circuit 12 is provided with an energy storage inductor, and the second booster circuit 13 includes a plurality of energy storage capacitors. circuit; the first boost circuit 12 is connected to the power supply 11 and the corresponding input terminals of the second MCU module 15 respectively, and the second boost circuit 13 is connected to the corresponding output terminal of the second MCU module 15 .

The second MCU module 15 includes a QFN40 chip and its peripheral circuits; the corresponding input end of the QFN40 chip is electrically connected to the energy storage inductor and the output end corresponding to the SGM3002 chip; the corresponding output end of the QFN40 chip is electrically connected through a plurality of energy storage The common terminal of the capacitor is electrically connected to the charging port circuit 3 and the wireless charging circuit 4 respectively.

The second switch circuit 14 includes a plurality of SOT23-6 chips and peripheral circuits thereof; an input end of the SOT23-6 chip is electrically connected to an output end corresponding to the QFN40 chip through the common end of the plurality of energy storage capacitors, The output ends of the plurality of SOT23-6 chips are electrically connected to the charging port circuit 3 and the wireless charging circuit 4 correspondingly.

The wireless charging circuit 4 includes a wireless transmitting circuit 41, a main control circuit 43, and a protocol decoy circuit 43; the corresponding input end of the wireless transmitting circuit 41 corresponds to the output end of one of the SOT23-6 chips and the main control circuit 43. The output terminal is electrically connected; the corresponding input terminal of the main control circuit 43 is connected to the output terminal of the protocol decoy circuit 43 ; the input terminal of the protocol deception circuit 43 is electrically connected to the charging port circuit 3 .

The main control circuit 43 is set as an MCU chip and its peripheral circuits, and the protocol decoy circuit 43 is set as a circuit composed of a plurality of resistors.

The charging port circuit 3 is connected to the external charged unit or power source 11 ; and after the charging port circuit 3 is connected to the external charged unit or power source 11 , the signal is reversely transmitted to the first MCU module 22 through the first switch circuit 21 . The corresponding input terminal of the first MCU module 22 is discharged or charged after being processed by the lower-level circuit.

Example:

A charging circuit also includes a power supply 11 (battery) protection circuit, a crystal oscillator circuit, and a modulation circuit; the power supply 11 (battery) protection circuit is used to protect the power supply 11 from overcharge, overdischarge, overvoltage, undervoltage and other states, thereby To effectively protect the power supply 11 (battery), the crystal oscillator circuit and the modulation circuit are electrically connected to the wireless charging circuit 44 .

The working principle of the present utility model:

(1) First, the protocol decoy circuit 43" deceives 5V or 9V of QC from the power supply 11 through the charging port circuit 3, the second switch circuit 14, and the QFN40 chip; The "transmitting circuit" converts the input DC 5V or 9V into high-frequency alternating current, thereby generating a magnetic field on the coil, and then transferring the energy to the external charging device (mobile phone) through the principle of electromagnetic induction; the "crystal oscillator circuit" can provide A fixed frequency to meet the power required by different external charging devices; "modulation circuit" can detect whether there is metal foreign matter in the coil, whether it is overcurrent, etc. "main control circuit 43" Respond to conditions such as temperature, overcurrent, and foreign matter;

(2) When discharging: the power supply 11 (battery) supplies power to the "power supply 11 management" part, which integrates the BOOST booster circuit and the fast charging protocol identification chip to boost the cell voltage from 4.2V to 5V/9V/12V, and then output to external charging equipment through the "interface part".

(3) When charging: When the external power supply 11 charges the product, the external power supply 11 supplies 5V/9V/12V to the charging port, and then supplies it to the power supply 11 management part, which integrates high-efficiency switching charging , drop the input voltage to 4.2V to charge the battery. "Battery protection circuit" This circuit can detect the overcharge, overdischarge, overvoltage, undervoltage and other states of the power supply 11 (battery), so as to effectively protect the battery.

Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention , alternatives and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (8)

1. A charging circuit, characterized in that: comprising, charging port circuit; a control circuit, the control circuit includes a first MCU module and a first switch circuit; the first MCU module is connected to a charging port circuit, and the first MCU module obtains a connection signal of an external charging device from the charging port circuit , after processing, it is output to the lower circuit through the first switch circuit; a power management circuit; the power management circuit includes a power supply, a booster circuit, a second MCU module, and a second switch circuit; an input end of the booster circuit is connected to a power supply, and an output end of the booster circuit, a second switch circuit The output of a switch circuit is connected to the corresponding input terminal of the second MCU module, and the output of the second MCU module is connected to the charging port circuit and the lower-level circuit through the second switch circuit; A wireless charging circuit, the input end of the wireless charging circuit is connected with the input end of the second switch circuit, and the output end of the wireless charging circuit is connected with the sending coil. 2. A charging circuit according to claim 1, characterized in that: the first MCU module comprises an ES7P003 chip and its peripheral circuits; the input end corresponding to the ES7P003 chip is electrically connected to the charging port circuit, and the The corresponding output end of the ES7P003 chip is electrically connected to the corresponding port of the first switch circuit and the second MCU module. 3 . The charging circuit according to claim 2 , wherein the first switch circuit is set as a SGM3002 chip and its peripheral circuits; the input terminal corresponding to the SGM3002 chip is electrically connected to the output terminal corresponding to the ES7P003 chip. 4 . connected, the output terminal corresponding to the SGM3002 chip is electrically connected to the corresponding terminal of the second MCU module. 4 . The charging circuit according to claim 3 , wherein the booster circuit comprises a first booster circuit and a second booster circuit; the first booster circuit is provided with an energy storage inductor, so the The second boost circuit includes a circuit composed of a plurality of energy storage capacitors; the first boost circuit is connected to the power supply and the input terminals corresponding to the second MCU module, respectively, and the second boost circuit is connected to the second MCU module corresponding to 's output. 5. A charging circuit according to claim 4, characterized in that: the second MCU module comprises a QFN40 chip and its peripheral circuits; the corresponding input end of the QFN40 chip is the output corresponding to the energy storage inductor and the SGM3002 chip The terminals are electrically connected; the corresponding output terminals of the QFN40 chip are electrically connected to the charging port circuit and the wireless charging circuit respectively through the common terminals of a plurality of energy storage capacitors. 6 . The charging circuit according to claim 5 , wherein the second switch circuit includes a plurality of SOT23-6 chips and peripheral circuits thereof; an input end of the SOT23-6 chip passes through a plurality of SOT23-6 chips. 7 . The common terminal of the energy storage capacitor is electrically connected to the output terminal corresponding to the QFN40 chip, and the output terminals of the plurality of SOT23-6 chips are electrically connected to the charging port circuit and the wireless charging circuit correspondingly. 7. A charging circuit according to claim 6, characterized in that: the wireless charging circuit comprises a wireless transmitting circuit, a main control circuit, and a protocol decoy circuit; the corresponding input end of the wireless transmitting circuit is connected to one of the SOT23 -6 The output end of the chip and the output end corresponding to the main control circuit are electrically connected; the corresponding input end of the main control circuit is connected to the output end of the protocol decoy circuit; the input end of the protocol decoy circuit is electrically connected to the charging port circuit connect. 8 . The charging circuit according to claim 7 , wherein the main control circuit is set as an MCU chip and its peripheral circuits, and the protocol decoy circuit is set as a circuit composed of a plurality of resistors. 9 .

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