CN219535674U

CN219535674U - Wireless charging circuit based on 8 bit singlechip

Info

Publication number: CN219535674U
Application number: CN202320430865.6U
Authority: CN
Inventors: 章进武; 邹文康
Original assignee: Xiamen Juyan Electronic Technology Co ltd
Current assignee: Xiamen Juyan Electronic Technology Co ltd
Priority date: 2023-03-09
Filing date: 2023-03-09
Publication date: 2023-08-15
Anticipated expiration: 2033-03-09

Abstract

The utility model discloses a wireless charging circuit based on an 8-bit singlechip, which comprises a receiving end and a transmitting end connected with the receiving end, wherein the receiving end and the transmitting end are simultaneously connected with a power supply, the receiving end is simultaneously connected with a charging detection circuit, a protection circuit and a battery, the transmitting end is connected with a current detection circuit, the receiving end is matched with the charging detection circuit, the protection circuit and the battery to form a wireless charging receiving circuit, and the transmitting end is matched with the current detection circuit to form a wireless charging transmitting circuit.

Description

Wireless charging circuit based on 8 bit singlechip

Technical Field

The utility model particularly relates to a wireless charging circuit based on an 8-bit singlechip.

Background

When the human society is developed into an informatization age, various electronic products are put into life like bamboo shoots after rain. MP3, MP4, smart phone, tablet personal computer and small-sized mobile office equipment, the electronic products are moving from singleization to diversification, and along with the higher and higher functional integration level, the electronic product screen is bigger and bigger, and the power consumption of the electronic products is also increasing.

At present, the development status of lithium battery wireless charging equipment does not integrate electromagnetic induction receiving, charging management and charging indication into a whole. In the conventional lithium battery, if the lithium battery is to be charged wirelessly, an induction coil is often required to be externally connected, and even a matched charging management circuit is required, so that the equipment is overlarge in size, and therefore, the cost is high and the circuit is complex.

Disclosure of Invention

In view of this, the present utility model aims to provide a wireless charging circuit with relatively simple peripheral circuits and low system cost, and the wireless charging circuit can control charging current during charging due to an 8-bit singlechip.

In order to solve the problems, the utility model adopts the following technology and method:

the utility model provides a wireless charging circuit based on 8 bit singlechip, includes the receiving terminal, connects the transmitting terminal of receiving terminal, receiving terminal and transmitting terminal access power simultaneously, charging detection circuit, protection circuit and battery are connected simultaneously to the receiving terminal, the transmitting terminal is connected current detection circuit, receiving terminal cooperation charging detection circuit, protection circuit and battery are wireless charging receiving circuit, transmitting terminal cooperation current detection circuit is wireless charging transmitting circuit.

Preferably, the wireless charging transmitting circuit comprises a wireless charging transmitting single chip microcomputer U1 internally integrated with an NMOS tube, a wireless charging coil bonding pad connected with the wireless charging transmitting single chip microcomputer U1, a VDD end connected with an external DC5V power supply to the wireless charging coil bonding pad, a DL1 circuit connected with the wireless charging transmitting single chip microcomputer U1, and an LED lamp connected with the wireless charging transmitting single chip microcomputer U1 and used for displaying the charging state.

Furthermore, the DL1 circuit comprises a PDA3 pin, and is connected with a wireless charging transmitting singlechip U1 through the PDA3 pin.

Preferably, the wireless charging receiving circuit comprises a wireless charging receiving single-chip microcomputer U1 of an internal integrated lithium battery charging circuit, and a wireless charging coil bonding pad matched with the wireless charging receiving single-chip microcomputer U1, and is connected with a triode Q1 and a triode Q2 of the wireless charging receiving single-chip microcomputer U1 through pins.

Further, a pin 6 connected with the LED lamp, a pin 11 for enabling the triode Q1 and the triode Q2 of the wireless charging receiving singlechip U1 and a pin 14 for charging the battery are arranged in the wireless charging receiving singlechip U1.

Further, the circuit in the wireless charging coil pad is provided with a diode D1, a diode D2, a diode D3, a diode D4, a diode D5, a capacitor C1, a capacitor C2, a capacitor C3, a resistor R1, a resistor R2 and a resistor R3, and the diode D1, the diode D2, the diode D3 and the diode D4 form a rectifier bridge, so that alternating current can be converted into direct current.

The utility model has the beneficial effects that: the utility model is suitable for wireless charging of lithium batteries, has relatively simple peripheral circuit and lower system cost, and simultaneously has controllable charging current.

Drawings

FIG. 1 is a frame diagram of a wireless charging circuit based on an 8-bit singlechip;

FIG. 2 is a schematic diagram of a wireless charging transmitting circuit;

fig. 3 is a schematic diagram of a wireless charging receiving circuit.

Detailed Description

The following detailed description of the utility model is provided in connection with the accompanying drawings to facilitate understanding and grasping of the technical scheme of the utility model.

In this embodiment, it should be understood that the directions or positional relationships indicated by the terms "middle", "upper", "lower", "top", "right", "left", "upper", "back", "middle", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description of the present utility model, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present utility model.

In this embodiment, if not specifically described, the members may be connected or fixed by bolts, pins, or the like, which are commonly used in the prior art, and therefore, the details thereof will not be described in this embodiment.

The utility model provides a wireless charging circuit based on 8 bit singlechip, as shown in fig. 1, includes the receiving terminal, connects the transmitting terminal of receiving terminal, receiving terminal and transmitting terminal access power simultaneously, receiving terminal connects charge detection circuit, protection circuit and battery simultaneously, the transmitting terminal connects current detection circuit, receiving terminal cooperation charge detection circuit, protection circuit and battery are wireless charge receiving circuit, transmitting terminal cooperation current detection circuit is wireless charge transmitting circuit.

As shown in fig. 2, and in combination with fig. 1, the wireless charging transmitting circuit includes a wireless charging transmitting single-chip microcomputer U1 with an NMOS tube integrated therein, a wireless charging coil pad connected to the wireless charging transmitting single-chip microcomputer U1, a VDD terminal connected to an external DC5V power supply to the wireless charging coil pad, a DL1 circuit connected to the wireless charging transmitting single-chip microcomputer U1, and an LED lamp connected to the wireless charging transmitting single-chip microcomputer U1 for displaying a charging state. The DL1 circuit comprises a PDA3 pin, the PDA3 pin is connected with a wireless charging transmitting single-chip microcomputer U1, specifically, during normal charging, the wireless charging transmitting single-chip microcomputer U1 outputs a charging protocol to a coil in a wireless charging coil bonding pad, when the aim of charging is achieved through controlling an NMOS tube is detected, charging current is sampled by means of the PDA3 pin so as to achieve modification of the charging current.

As shown in fig. 3, and in combination with fig. 1, the wireless charging receiving circuit includes a wireless charging receiving single-chip microcomputer U1 of an internal integrated lithium battery charging circuit, and a wireless charging coil pad matched with the wireless charging receiving single-chip microcomputer U1, and is connected with a triode Q1 and a triode Q2 of the wireless charging receiving single-chip microcomputer U1 through pins, and specifically, the triode Q1 and the triode Q2 are responsible for transmitting and receiving a wireless charging protocol. The wireless charging receiving singlechip U1 is provided with a pin 6 connected with the LED lamp, a pin 11 for enabling the triode Q1 and the triode Q2 of the wireless charging receiving singlechip U1 and a pin 14 for charging a battery. The circuit in the wireless charging coil bonding pad is provided with a diode D1, a diode D2, a diode D3, a diode D4, a diode D5, a capacitor C1, a capacitor C2, a capacitor C3, a resistor R1, a resistor R2 and a resistor R3, wherein the diode D1, the diode D2, the diode D3 and the diode D4 form a rectifier bridge, alternating current can be converted into direct current, and specifically, the diode D1, the diode D2, the diode D3 and the diode D4 form the rectifier bridge to convert alternating current into direct current, clutter is filtered through the capacitor C3, and meanwhile, the voltage is stabilized to be 5V by utilizing the resistor R1 and the diode D5.

Under normal conditions, the wireless charging receiving singlechip U1 reads the voltage between the resistor R2 and the resistor R3 to judge whether a coil is connected in, the PB0 pin analyzes a charging protocol, after the charging protocol is met, the pin 14 of the wireless charging receiving singlechip U1 is powered on and charges a battery through an internal circuit, charging current can be set through a program, and the display of an LED can be controlled through the PA6 during charging.

The foregoing is merely illustrative of the present utility model, and the scope of the utility model is not limited thereto, but is intended to cover any variations or alternatives not suggested by the applicant's knowledge, and accordingly, the scope of the utility model is to be determined by the appended claims.

Claims

1. A wireless charging circuit based on 8 bit singlechip, its characterized in that: the wireless charging device comprises a receiving end and a transmitting end connected with the receiving end, wherein the receiving end and the transmitting end are connected with a power supply at the same time, the receiving end is connected with a charging detection circuit, a protection circuit and a battery at the same time, the transmitting end is connected with a current detection circuit, the receiving end is matched with the charging detection circuit, the protection circuit and the battery to be a wireless charging receiving circuit, and the transmitting end is matched with the current detection circuit to be a wireless charging transmitting circuit.

2. The wireless charging circuit based on the 8-bit singlechip as set forth in claim 1, wherein: the wireless charging transmitting circuit comprises a wireless charging transmitting single-chip microcomputer U1 with an NMOS tube integrated inside, a wireless charging coil bonding pad connected with the wireless charging transmitting single-chip microcomputer U1, a VDD end connected with an external DC5V power supply to the wireless charging coil bonding pad, a DL1 circuit connected with the wireless charging transmitting single-chip microcomputer U1, and an LED lamp connected with the wireless charging transmitting single-chip microcomputer U1 and used for displaying charging states.

3. The wireless charging circuit based on the 8-bit singlechip as set forth in claim 2, wherein: the DL1 circuit comprises a PDA3 pin, and is connected with a wireless charging transmitting singlechip U1 through the PDA3 pin.

4. The wireless charging circuit based on the 8-bit singlechip as set forth in claim 1, wherein: the wireless charging receiving circuit comprises a wireless charging receiving singlechip U1 of an internal integrated lithium battery charging circuit, and a wireless charging coil bonding pad matched with the wireless charging receiving singlechip U1, and is connected with a triode Q1 and a triode Q2 of the wireless charging receiving singlechip U1 through pins.

5. The wireless charging circuit based on the 8-bit singlechip as set forth in claim 4, wherein: the wireless charging receiving singlechip U1 is provided with a pin 6 connected with the LED lamp, a pin 11 for enabling the triode Q1 and the triode Q2 of the wireless charging receiving singlechip U1 and a pin 14 for charging a battery.

6. The wireless charging circuit based on the 8-bit singlechip as set forth in claim 4, wherein: the circuit in the wireless charging coil bonding pad is provided with a diode D1, a diode D2, a diode D3, a diode D4, a diode D5, a capacitor C1, a capacitor C2, a capacitor C3, a resistor R1, a resistor R2 and a resistor R3, wherein the diode D1, the diode D2, the diode D3 and the diode D4 form a rectifier bridge, and alternating current can be converted into direct current.