CN217427775U

CN217427775U - Two-in-one wireless charger circuit

Info

Publication number: CN217427775U
Application number: CN202123198366.9U
Authority: CN
Inventors: 沈嘉鸿; 刘兴月
Original assignee: Shenzhen Ruizi Technology Co ltd
Current assignee: Shenzhen Ruizi Technology Co ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-09-13
Anticipated expiration: 2031-12-17

Abstract

The utility model relates to a charging circuit technical field, in particular to two unification wireless charger circuits, earphone charging part voltage reduction circuit and the partial master control circuit of cell-phone charging connect respectively in power supply part circuit, and earphone charging part master control circuit connects in earphone charging part voltage reduction circuit, and earphone charging part master control circuit and cell-phone charging part master control circuit connect respectively in LED instructs partial circuit. Compared with the prior art, the utility model discloses a two unification wireless charger circuits have adopted two tunnel cell-phones that separate to charge and earphone charging circuit solution, have avoided the cell-phone to charge and the earphone mutual interference between charging, and the charge protection system of two tunnel charges can more effectually let cell-phone and earphone effectual charging fast, can reach the purpose of protection cell-phone and earphone, improves the user and uses experience and feel.

Description

Two-in-one wireless charger circuit

[ technical field ] A method for producing a semiconductor device

The utility model relates to a charging circuit technical field, in particular to wireless charger circuit of two unifications.

[ background of the invention ]

The wireless charger of prior art's magnetism generally can only charge to the cell-phone, perhaps can only charge to the earphone, can't satisfy cell-phone and earphone simultaneously on a charger and charge, and the user need prepare two kinds of different chargers, increases use cost, and the user uses and experiences the sense not good enough.

[ Utility model ] content

In order to overcome the above problems, the utility model provides a can effectively solve two unification wireless charger circuits of above-mentioned problem.

The utility model provides an above-mentioned technical problem provide a technical scheme is: the two-in-one wireless charger circuit comprises a power supply part circuit, an earphone charging part voltage reduction circuit, an earphone charging part main control circuit, a mobile phone charging part main control circuit and an LED indication part circuit, wherein the earphone charging part voltage reduction circuit and the mobile phone charging part main control circuit are respectively connected to the power supply part circuit, the earphone charging part main control circuit is connected to the earphone charging part voltage reduction circuit, and the earphone charging part main control circuit and the mobile phone charging part main control circuit are respectively connected to the LED indication part circuit.

Preferably, the power supply part circuit comprises a TYPEC power supply interface, and the TYPEC power supply interface is connected with a CLC filter circuit.

Preferably, the CLC filter circuit includes a resistor R8, a resistor R10, a resistor R13, and a resistor R15, and the resistor R8, the resistor R10, the resistor R13, and the resistor R15 respectively employ two 600R high-frequency filter beads.

Preferably, the earphone charging part voltage reduction circuit comprises a KF7420 type voltage reduction chip, an inductor L2 and a capacitor C22, wherein the voltage reduction chip is connected to the inductor L2, and the capacitor C22 is connected to the inductor L2.

Preferably, the earphone charging part main control circuit adopts an IP6806 model chip.

Preferably, the mobile phone charging part main control circuit adopts an IP6808 model chip.

Preferably, the LED indicating part circuit adopts two separate LED indicating lamps respectively connected to the main control circuit of the mobile phone charging part and the main control circuit of the earphone charging part.

Compared with the prior art, the utility model discloses a two unification wireless charger circuits have adopted two tunnel cell-phones that separate to charge and earphone charging circuit solution, have avoided the cell-phone to charge and the earphone mutual interference between charging, and the charge protection system of two tunnel charges can more effectually let cell-phone and earphone effectual charging fast, can reach the purpose of protection cell-phone and earphone, improves the user and uses experience and feel.

[ description of the drawings ]

FIG. 1 is a diagram of the overall frame structure of the two-in-one wireless charger circuit of the present invention;

FIG. 2 is a schematic diagram of a power supply portion of the two-in-one wireless charger circuit of the present invention;

fig. 3 is a schematic diagram of a voltage reduction circuit of the earphone charging part of the two-in-one wireless charger circuit of the present invention;

fig. 4 is a schematic diagram of the main control circuit of the earphone charging part of the two-in-one wireless charger circuit of the present invention;

fig. 5 is a schematic diagram of a main control circuit of a mobile phone charging part of the two-in-one wireless charger circuit of the present invention;

fig. 6 is a schematic diagram of the LED indicating part of the two-in-one wireless charger circuit of the present invention.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the following embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

It should be noted that all directional indications (such as up, down, left, right, front, and back … …) in embodiments of the present invention are limited to relative positions on a given view, not absolute positions.

Furthermore, descriptions in the present application as to "first," "second," etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

Referring to fig. 1, the utility model discloses a wireless charger circuit of two unifications, including power supply part circuit, earphone charging part step-down circuit, earphone charging part master control circuit, the cell-phone partial master control circuit that charges and LED indication portion circuit, earphone charging part step-down circuit and cell-phone charging part master control circuit connect respectively in power supply part circuit, earphone charging part master control circuit connects in earphone charging part step-down circuit, earphone charging part master control circuit and cell-phone charging part master control circuit connect respectively in LED indication portion circuit.

Referring to fig. 2, the power supply circuit includes a TYPEC power interface to provide a fast charging mode. The TYPEC power supply interface is connected with a CLC filter circuit, the CLC filter circuit comprises a resistor R8, a resistor R10, a resistor R13 and a resistor R15, the resistor R8, the resistor R10, the resistor R13 and the resistor R15 respectively adopt two 600R high-frequency filter magnetic beads, and the interference of a power supply part on a charging part can be effectively avoided. The CLC filter circuit is also provided with an electrolytic capacitor C17, an electrolytic capacitor C18, an electrolytic capacitor C28 and an electrolytic capacitor C29, so that ripples can be effectively filtered, and meanwhile, different chargers can stably supply power for wireless charging. The CLC filter circuit is also provided with two 10K discharge resistors of a resistor R45 and a resistor R46, so that the energy stored by the capacitor can be better released in a power-off state.

Referring to fig. 3, the voltage dropping circuit of the charging portion of the earphone includes a voltage dropping chip of KF7420 type, an inductor L2 and a capacitor C22, the voltage dropping chip is connected to the inductor L2, and the capacitor C22 is connected to the inductor L2. When the earphone charging part voltage reduction circuit works, a stable voltage reduction circuit loop is formed by the voltage reduction chip of a KF7420 model, the inductor L24.7uH and the capacitor C22, and stable 5V voltage is provided for the earphone charging part main control circuit.

Referring to fig. 4, the main control circuit of the earphone charging portion adopts an IP6806 type chip, and after protocol detection pins DM and DP of the IP6806 type chip are in protocol communication with the charger, the earphone charging portion is rectified and stepped down by a step-down circuit, and then stable dc voltage is supplied. At the moment, the direct-current voltage input by the wireless charging transmitting terminal generates alternating-current voltage at points LX1 and LX2 through a full-bridge MOS integrated in an IP6806 model chip to form a square wave. The square wave loading generates an alternating current at two ends of the coil L1, the alternating current generates a magnetic field through the coil L1, and the receiving end coil induces the magnetic field to generate the alternating current at the receiving end coil. The alternating current is converted into direct current voltage through a rectifier bridge of the receiving end, and the direct current voltage charges the battery through a linear voltage stabilization regulating circuit and a charging management circuit of the receiving end. In order to ensure the stability of the whole wireless charging system, a target voltage needs to be set and controlled through a feedback loop. The feedback loop first collects the V-DET voltage and subtracts it from the target voltage to produce an error signal. The error signal is transmitted to an IP6806 chip of the transmitting end through a communication mode specified by WPC, the IP6806 chip judges whether the receiving end wants to increase or decrease energy of the transmitting end, and meanwhile, the output of the energy is changed through a mode of adjusting duty ratio. The main control circuit of the earphone charging part further comprises a current detection circuit, and the FOD state can be judged through the current detection circuit. The main control circuit of the earphone charging part further comprises an overvoltage protection circuit, a short-circuit protection circuit and an over-temperature protection circuit, so that normal charging of the earphone can be better protected.

Referring to fig. 5, the main control circuit of the charging portion of the mobile phone adopts an IP6808 type chip, and after protocol detection pins DM and DP of the IP6808 type chip are in communication with a charger protocol, a stable dc voltage is supplied. At the moment, the wireless charging transmitting terminal inputs direct-current voltage, the direct-current voltage passes through the externally-hung full-bridge MOS Q1 and the externally-hung MOS Q2, and alternating-current voltage is generated at points LX1, LX2, HG1 and HG2 to form a square wave. The square wave loading generates an alternating current across coil L3, which generates a magnetic field through coil L3. The receiving end coil induces the magnetic field, and alternating current is generated at the receiving end coil. The alternating current is converted into direct current voltage through a rectifier bridge inside the receiving end, and the direct current voltage charges the battery through a linear voltage-stabilizing regulating circuit inside the receiving end and a charging management circuit. In order to ensure the stability of the whole wireless charging system, a target voltage needs to be set and controlled through a feedback loop. The feedback loop will first collect the voltage of COIL-1 through KF321 single operational amplifier IC and compare it with the target voltage to generate an error signal. The error signal is transmitted to an IP6808 type chip of the transmitting end in a communication mode specified by WPC, the IP6808 type chip judges whether the receiving end hopes that the transmitting end increases energy or reduces energy, and meanwhile, the output of the energy is changed in a mode of adjusting duty ratio. The main control circuit of the mobile phone charging part further comprises a current detection circuit, and the FOD state can be judged through the current detection circuit. The main control circuit of the mobile phone charging part further comprises an overvoltage protection circuit, a short-circuit protection circuit and an over-temperature protection circuit, and the mobile phone can be charged better.

Referring to fig. 6, the LED indicating circuit is connected to the main control circuit of the charging portion of the mobile phone and the main control circuit of the charging portion of the earphone respectively by two separate LED indicating lamps for indicating charging of the mobile phone and charging of the earphone. Different LED pilot lamps show the state can be in good time show the current state of charge of cell-phone and earphone. The standby, charging, full charging and abnormal conditions can be completely distinguished and indicated.

Compared with the prior art, the utility model discloses a two unification wireless charger circuits have been used two tunnel cell-phones that separate to charge and earphone charging circuit solution, have avoided the cell-phone to charge and the earphone mutual interference between charging, and two tunnel charge protection systems can more effectually let cell-phone and earphone effectual charging fast, can reach the purpose of protection cell-phone and earphone, improve user experience and feel.

The above description is only for the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications made within the spirit of the present invention, equivalent replacements and improvements should be included in the scope of the present invention.

Claims

1. The two-in-one wireless charger circuit is characterized by comprising a power supply part circuit, an earphone charging part voltage reduction circuit, an earphone charging part main control circuit, a mobile phone charging part main control circuit and an LED indication part circuit, wherein the earphone charging part voltage reduction circuit and the mobile phone charging part main control circuit are respectively connected to the power supply part circuit, the earphone charging part main control circuit is connected to the earphone charging part voltage reduction circuit, and the earphone charging part main control circuit and the mobile phone charging part main control circuit are respectively connected to the LED indication part circuit.

2. The two-in-one wireless charger circuit of claim 1, wherein said power supply portion circuit comprises a TYPEC power interface, said TYPEC power interface being connected to a CLC filter circuit.

3. The two-in-one wireless charger circuit as claimed in claim 2, wherein the CLC filter circuit comprises a resistor R8, a resistor R10, a resistor R13 and a resistor R15, and two 600R high frequency filter beads are respectively used for the resistor R8, the resistor R10, the resistor R13 and the resistor R15.

4. The two-in-one wireless charger circuit as claimed in claim 1, wherein the earphone charging part voltage reduction circuit comprises a KF7420 type voltage reduction chip, an inductor L2 and a capacitor C22, the voltage reduction chip is connected to the inductor L2, and the capacitor C22 is connected to the inductor L2.

5. The two-in-one wireless charger circuit as claimed in claim 1, wherein the earphone charging portion main control circuit is an IP6806 chip.

6. The two-in-one wireless charger circuit of claim 1, wherein the mobile phone charging part main control circuit adopts an IP6808 type chip.

7. The two-in-one wireless charger circuit according to claim 1, wherein the LED indication part circuit adopts two separate LED indication lamps respectively connected to the handset charging part main control circuit and the earphone charging part main control circuit.