CN-224233385-U - Wireless charging circuit for Bluetooth sound equipment

Abstract

The utility model discloses a wireless charging circuit for Bluetooth sound equipment, which relates to the technical field of Bluetooth sound equipment and comprises a wireless charging seat, a wireless charging module and a lithium battery charging circuit, wherein the wireless charging seat is powered by the wireless charging module, the wireless charging module is used for providing charging voltage for 5V Bluetooth sound equipment or providing charging voltage for 7.4V Bluetooth sound equipment through the lithium battery charging circuit, the lithium battery charging circuit comprises a voltage reduction unit and an adaptive voltage increasing charging unit, and the voltage reduction unit is respectively connected with the output end of the wireless charging module and the input end of the adaptive voltage increasing charging unit. When the wireless charging module provides charging voltage for the 5V Bluetooth sound equipment, the lithium battery charging circuit does not work, and when the lithium battery charging circuit works, the self-adaptive boosting charging unit can adaptively adjust charging current, so that the charger is prevented from being damaged by super power.

Inventors

• LI WEIFENG
• LIU HUI

Assignees

• 深圳市博益友科技有限公司

Dates

Publication Date

20260512

Application Date

20250625

Claims (4)

1. 1. The wireless charging circuit for the Bluetooth sound equipment is characterized by comprising a wireless charging seat, a wireless charging module and a lithium battery charging circuit, wherein the wireless charging seat is used for supplying power to the wireless charging module, the wireless charging module is used for supplying charging voltage to the 5V Bluetooth sound equipment or supplying charging voltage to the 7.4V Bluetooth sound equipment through the lithium battery charging circuit, the lithium battery charging circuit comprises a voltage reduction unit and an adaptive voltage boosting charging unit, and the voltage reduction unit is respectively connected with the output end of the wireless charging module and the input end of the adaptive voltage boosting charging unit; The voltage reducing unit comprises a voltage reducing chip, a resistor RS6, a resistor RS7, a resistor RS4, a resistor RS12, a resistor RS14, a capacitor CS6, a capacitor CS7, a capacitor CS8, a capacitor CS9, a capacitor CS10, a capacitor CS11, a capacitor CS15, a capacitor CS17, a capacitor CS19, an inductor LS2 and an inductor LS4, wherein an EN pin of the voltage reducing chip is respectively connected with one ends of the resistor RS6 and the resistor RS7, the other end of the resistor RS6 is connected with a DC_EN pin of the wireless charging module, an IN pin of the voltage reducing chip is respectively connected with a VBUSC pin of the wireless charging module through the capacitor CS6, the capacitor CS7 and the capacitor CS15, the other ends of the capacitor CS6, the capacitor CS7, the capacitor CS15 and the resistor RS7 are grounded, a SW pin of the voltage reducing chip is respectively connected with one ends of the resistor RS14, the resistor CS 12 and the inductor L2 through the capacitor CS17, the other ends of the resistor RS12 are respectively connected with a BS pin of the voltage reducing chip, the other ends of the inductor LS2 are respectively connected with the inductor LS4, the resistor RS4, the capacitor CS11 and the capacitor CS9, the resistor CS11 and the capacitor CS 4 are respectively connected with the capacitor CS 5 and the capacitor CS 5 through the capacitor CS 5 and the capacitor CS 5; The self-adaptive boosting charging unit comprises a self-adaptive boosting chip and a vertical patch connected with the output end of the self-adaptive boosting chip, and the output end of the vertical patch is connected with a battery of the 7.4V Bluetooth sound equipment.
2. 2. The wireless charging circuit for bluetooth speaker of claim 1, wherein the wireless charging module is a 15W wireless charging module, and the output voltage of the 15W wireless charging module is 5V or 9V.
3. 3. The wireless charging circuit for bluetooth sound equipment according to claim 1, wherein the withstand voltage value of the voltage reducing chip is 30V or more.
4. 4. The wireless charging circuit for bluetooth sound according to claim 1, wherein the wireless charging module and the adaptive boost charging unit are both provided with an indicator light.

Description

Wireless charging circuit for Bluetooth sound equipment Technical Field The utility model relates to the technical field of Bluetooth sound equipment, in particular to a wireless charging circuit for Bluetooth sound equipment. Background The 7.4V Bluetooth sound equipment is wireless audio equipment powered by 7.4V voltage, can provide stronger power output, brings larger volume and fuller low-frequency performance compared with the common 3.7V or 5V sound equipment, and is suitable for playing music with large dynamic range such as fashion, electronics and the like. Most of charging circuits of the existing 7.4V Bluetooth sound equipment adopt a step-down charging circuit, and the problem that the charger is damaged by super power is easy to occur. Disclosure of utility model The utility model mainly aims to provide a wireless charging circuit for a Bluetooth sound box, and aims to solve the technical problem that the charging circuit of a 7.4V Bluetooth sound box in the related art adopts a step-down charging circuit mostly, so that the problem of damage to a charger due to super power is easy to occur. In order to achieve the above objective, the wireless charging circuit for bluetooth sound equipment provided by the utility model comprises a wireless charging seat, a wireless charging module and a lithium battery charging circuit, wherein the wireless charging seat is powered by the wireless charging module, the wireless charging module is used for providing charging voltage for 5V bluetooth sound equipment or providing charging voltage for 7.4V bluetooth sound equipment through the lithium battery charging circuit, the lithium battery charging circuit comprises a voltage reduction unit and an adaptive voltage increase charging unit, and the voltage reduction unit is respectively connected with the output end of the wireless charging module and the input end of the adaptive voltage increase charging unit. In an embodiment of the utility model, the wireless charging module is a 15W wireless charging module, and an output voltage of the 15W wireless charging module is 5V or 9V. IN an embodiment of the utility model, the buck unit includes a buck chip, a resistor RS6, a resistor RS7, a resistor RS4, a resistor RS12, a resistor RS14, a capacitor CS6, a capacitor CS7, a capacitor CS8, a capacitor CS9, a capacitor CS10, a capacitor CS11, a capacitor CS15, a capacitor CS17, a capacitor CS19, an inductor LS2 and an inductor LS4, an EN pin of the buck chip is respectively connected with one ends of the resistor RS6 and the resistor RS7, the other end of the resistor RS6 is connected with a dc_en pin of the wireless charging module, an IN pin of the buck chip is respectively connected with a VBUSC pin of the wireless charging module through the capacitor CS6, the capacitor CS7 and the capacitor CS15, the other ends of the capacitor CS6, the capacitor CS7, the capacitor CS15 and the resistor RS7 are grounded, a SW pin of the buck chip is respectively connected with one ends of the resistor RS14, the resistor RS12 and the inductor L2 through the capacitor CS17, the other ends of the resistor RS12 are connected with a BS pin of the buck chip through the capacitor CS8, the other ends of the inductor LS2 are respectively connected with the inductor LS4, the capacitor CS11 and the capacitor CS9 are respectively connected with the capacitor CS 5 through the capacitor CS 5 and the capacitor CS 5, and the other ends of the capacitor CS9 are respectively grounded, and the capacitor CS is connected with the capacitor CS 5 is connected with the capacitor 5 and the capacitor is grounded. In an embodiment of the utility model, a withstand voltage value of the voltage reducing chip is greater than or equal to 30V. In an embodiment of the utility model, the adaptive boost charging unit comprises an adaptive boost chip and a vertical patch connected with the output end of the adaptive boost chip, and the output end of the vertical patch is connected with a battery of the 7.4V Bluetooth sound. In an embodiment of the utility model, the wireless charging module and the adaptive boost charging unit are both provided with indicator lamps. According to the wireless charging circuit for the Bluetooth sound provided by the technical scheme of the utility model, the wireless charging module is used for providing charging voltage for the 5V Bluetooth sound or providing charging voltage for the 7.4V Bluetooth sound through the lithium battery charging circuit, when the wireless charging module is used for providing charging voltage for the 5V Bluetooth sound, the lithium battery charging circuit does not work, and when the lithium battery charging circuit works, the self-adaptive boosting charging unit can be used for self-adaptively adjusting charging current, so that the charger is prevented from being damaged by super power. Drawings In order to more clearly illustrate the embodiments of the present utility model or the technical soluti