Control circuit and earphone charging bin
By combining the switching circuit and Hall effect control circuit with a capacitor in the headphone charging case control circuit, the problem of limited I/O ports in the charging case management chip is solved, enabling the simultaneous illumination of LEDs by the buttons and Hall effect sensor, and reducing costs.
Patent Information
- Application Number
- CN202520126650.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-01-17
AI Technical Summary
The existing headphone charging case control circuit cannot simultaneously meet the application requirements of buttons and Hall sensors due to the limited number of I/O ports of the charging case management chip, resulting in the inability to light up LEDs at the same time.
By electrically connecting both the switching circuit and the Hall control circuit to the same pin of the charging case management chip, and by connecting a series capacitor in parallel with the switching circuit on the same pin, the LED light is controlled by the absorption and discharge of the capacitor, thus enabling the button and the Hall sensor to work simultaneously.
With a limited number of I/O ports, the buttons and Hall effect sensors can simultaneously control the LED lights, saving costs.
Smart Images
Figure CN223785797U_ABST
Abstract
Description
Technical Field
[0001] This utility model application relates to the field of headphone charging case technology, and in particular to a control circuit and headphone charging case. Background Technology
[0002] An earphone charging case is a device used to store and charge earphones. Earphone charging cases are usually equipped with LED lights. When charging earphones, the LED lights on the charging case will light up to indicate the charging progress. When the earphone charging case is opened, the LED lights on the charging case should also light up to check the battery level and indicate the operation.
[0003] Existing headphone charging case control circuits such as Figure 1 As shown, the device includes a charging case management chip. Pin 7 (KEY / HALL) of the charging case management chip is connected to a switch button, a Hall sensor, and a power supply. Pin 6 of the charging case management chip is connected to an LED. When a high-level voltage greater than 2V is input to the power supply, pin 6 of the charging case management chip outputs a 3V voltage to the LED, causing the LED to light up for 4 seconds. However, pin 7 of the charging case management chip only has one pin, which cannot meet the requirement of simultaneously using the switch button and the Hall sensor on the charging case management chip (U1) and simultaneously lighting the LED. To achieve the same requirement of simultaneously using the switch button and the Hall sensor on the charging management chip (U1) and simultaneously lighting the LED, the only existing solution is to increase the number of pins on the charging case management chip, i.e., increase the number of I / O ports. However, this will inevitably increase the chip design cost, thus increasing the overall product cost.
[0004] Therefore, the current control circuit of the earphone charging case cannot meet the requirements of scenarios where both buttons and Hall sensors need to be able to light up LEDs, based on the number of I / O ports of the existing charging case management chip. Utility Model Content
[0005] In view of this, the purpose of this utility model embodiment is to provide a control circuit and an earphone charging case that can ensure that buttons and Hall sensors can be used simultaneously on the charging management IC with a limited number of I / O ports of the charging case management chip, thus meeting the requirement that buttons and Hall sensors can light up LEDs at the same time.
[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:
[0007] According to one aspect of the embodiment of the utility model, a control circuit is provided, which comprises a charging compartment management chip, a switch circuit, a Hall control circuit and an LED lamp control circuit; the switch circuit and the Hall control circuit are both electrically connected to the same pin of the charging compartment management chip; the LED lamp control circuit is connected to another pin of the charging compartment management chip; the Hall control circuit is connected to a capacitor; the capacitor and the switch circuit are connected in parallel to a pin of the charging compartment management chip.
[0008] The switch circuit comprises a switch, one end of the switch is connected to a battery, the other end of the switch is connected to a pin of the charging compartment management chip, and the other end of the switch is also connected in parallel to a resistor, and the other end of the resistor is grounded.
[0009] The Hall control circuit comprises a Hall chip, the first pin, the second pin and the third pin of the Hall chip are all grounded, the fourth pin of the Hall chip is connected to a power supply, and the fifth pin of the Hall chip is connected to the capacitor and connected to a pin of the charging compartment management chip through the capacitor.
[0010] One end of the LED lamp control circuit is connected to a pin of the charging compartment management chip, and the other end of the LED lamp control circuit is grounded.
[0011] The capacity of the capacitor is 10uF.
[0012] According to another aspect of the embodiment of the utility model, an earphone charging compartment is provided, which comprises a box body and an upper cover; the upper cover and the box body are connected through a rotating shaft; magnets are arranged on the side edges of the upper cover and the box body; a control circuit is further arranged in the box body; the control circuit comprises a charging compartment management chip, a switch circuit, a Hall control circuit and an LED lamp control circuit; the switch circuit and the Hall control circuit are both electrically connected to the same pin of the charging compartment management chip; the LED lamp control circuit is connected to another pin of the charging compartment management chip; the Hall control circuit is connected to a capacitor; and the capacitor and the switch circuit are connected in parallel to a pin of the charging compartment management chip.
[0013] The switch circuit comprises a switch, one end of the switch is connected to a battery, the other end of the switch is connected to a pin of the charging compartment management chip, and the other end of the switch is also connected in parallel to a resistor, and the other end of the resistor is grounded.
[0014] The Hall control circuit comprises a Hall chip, the first pin, the second pin and the third pin of the Hall chip are all grounded, the fourth pin of the Hall chip is connected to a power supply, and the fifth pin of the Hall chip is connected to the capacitor and connected to a pin of the charging compartment management chip through the capacitor.
[0015] One end of the LED lamp control circuit is connected to a pin of the charging compartment management chip, and the other end of the LED lamp control circuit is grounded.
[0016] The capacity of the capacitor is 10uF.
[0017] Compared with the earphone charging compartment of the prior art, since the number of IO ports of the charging compartment management chip is limited, the key and the Hall sensor cannot be simultaneously applied to the charging compartment management chip (U1) to control the lighting of the LED lamp. The control circuit of the earphone charging compartment disclosed in the application electrically connects the switch circuit and the Hall control circuit to the same pin of the charging compartment management chip. The Hall control circuit is connected in series with a capacitor. The capacitor and the switch circuit are connected in parallel to a pin of the charging compartment management chip. When the switch circuit is closed, a high level is received by the pin of the charging compartment management chip connected with the switch circuit. After the charging compartment management chip internally identifies the high level, another pin connected with the LED lamp outputs a high level greater than 2.8V to light the LED lamp. When the Hall sensor senses the magnet, a high level is output. At this time, the capacitor C1 connected in series with the Hall sensor absorbs the electric energy. When the magnet leaves, the Hall sensor outputs 0V. At this time, the capacitor C1 begins to discharge and provides a high level to the pin of the charging management IC connected with the capacitor. After the charging compartment management chip internally identifies the high level, another pin connected with the LED lamp outputs a high level greater than 2.8V to light the LED lamp. In this way, the earphone charging compartment disclosed in the application can ensure that the key and the Hall sensor can simultaneously control the lighting of the LED lamp under the condition of the limited number of IO ports of the charging compartment management chip, thereby greatly saving the cost. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0019] Figure 1 is a circuit principle diagram of the prior control circuit;
[0020] Figure 2 is a circuit block diagram of the control circuit of one embodiment of the present application;
[0021] Figure 3 is a circuit principle diagram of the control circuit of one embodiment of the present application;
[0022] Figure 4 is a structure diagram of the earphone charging bin according to another embodiment of the utility model. DETAILED DESCRIPTION
[0023] In order to make the technical problem, technical scheme and beneficial effect of the utility model to be solved more clear, explicit, the following is combined with the drawing and example, and the utility model is made further detailed description.It should be understood that the specific embodiments described here are only to explain the utility model, and are not used to limit the utility model.
[0024] Please refer to Figures 2 to 4 It is a control circuit and earphone charging bin provided by the embodiment of the utility model, can ensure that the key and hall inductor are applied on the charging management IC (U1) simultaneously under the condition of the limited number of IO ports of the charging bin management chip, meet the demand of lighting LED lamp simultaneously.In order to facilitate the description, only the part related to the embodiment is shown.
[0025] Embodiment one
[0026] Please refer to Figure 2 And Figure 3 As shown in the drawing, the embodiment of the application provides a control circuit, the control circuit includes charging bin management chip 101 (U1), switch circuit 102, hall control circuit 103 and LED lamp control circuit 104;The same pin of the charging bin management chip 101, namely the 7th pin, is electrically connected with the switch circuit 102 and the hall control circuit 103, the LED lamp control circuit 104 is connected with another pin 6 of the charging bin management chip 101, the hall control circuit 103 is connected with a capacitor C1, and the capacitor C1 is connected with the switch circuit 102 in parallel on the 7th pin of the charging bin management chip 101.
[0027] The switch circuit 102 includes a switch button S1, one end of the switch button S1 is connected with a battery VBAT, the other end of the switch is connected with the 7th pin of the charging bin management chip 101, and the other end of the switch button S1 is also connected with a resistor R in parallel, and the other end of the resistor R is grounded.
[0028] The hall control circuit 103 includes a hall chip U2, the first pin, the second pin and the third pin of the hall chip U2 are grounded, the fourth pin of the hall chip U2 is connected with a power supply VBAT, the fifth pin of the hall chip U2 is connected with the capacitor C1, and the capacitor C1 is connected with the 7th pin of the charging bin management chip 101.
[0029] One end of the LED lamp control circuit 104 is connected with the 6th pin of the charging bin management chip, and the other end of the LED lamp control circuit 104 is grounded.
[0030] In this embodiment, the capacity of the capacitor C1 is 10uF.
[0031] When the control circuit works, the seventh pin (KEY / HALL) of the charging compartment management chip (U1) is connected with one end of the switch key (S1), and the other end of the switch key (S1) is connected with the battery (VBAT). After the switch key (S1) is pressed down, the seventh pin of the charging compartment management chip U1 is connected with the battery (VBAT), and the seventh pin receives a high level greater than 3.1V. After the charging compartment management chip U1 internally identifies this high level, it outputs a high level greater than 2.8V to the anode of the LED lamp through the sixth pin (LED) to light up the LED lamp. In this way, the user can check the power of the earphone charging compartment through the lighting of the LED lamp. The output pin (OUT) of the Hall sensor (U2) is connected with the seventh pin (KEY / HALL) of the charging compartment management chip U1 in series with a capacitor with a capacity of 10UF, and shares the seventh pin with the switch key (S1). When the Hall sensor (U2) senses the magnet, it outputs a high level greater than 3.1V which is the same as the battery (VBAT). At this time, the 10UF large capacitor C1 will absorb the electric energy. When the magnet leaves, the Hall sensor (U2) will output 0V. At this time, the 10UF large capacitor C1 will begin to discharge and output a high level to the seventh pin of the charging management IC. After the charging compartment management chip U1 internally identifies this high level, it outputs to the anode of the LED lamp through the sixth pin (LED) to light up the LED lamp. In this way, the control circuit of the present application ensures that the key and the Hall sensor can be applied to the charging management IC at the same time under the condition of the limited number of IO ports of the charging compartment management chip, and meets the demand that the key and the Hall sensor can light up the LED lamp at the same time.
[0032] The control circuit in the embodiment of the application is electrically connected to the same pin of the charging compartment management chip 101 through the switch circuit 102 and the Hall control circuit 103. The Hall control circuit 103 is connected in series with a capacitor C1, and the capacitor C1 is connected in series with the switch circuit 102 on a pin of the charging compartment management chip. When the switch circuit 102 is closed, a pin of the charging compartment management chip U1 connected with the switch circuit 102 receives a high level. After the charging compartment management chip internally recognizes the high level, another pin connected with the LED lamp outputs a high level greater than 2.8V to light the LED lamp. When the Hall sensor (U2) senses the magnet, it outputs a high level. At this time, the capacitor C1 absorbs the electric energy. When the magnet leaves, the Hall sensor (U2) outputs 0V. At this time, the capacitor C1 begins to discharge and provides a high level to the pin of the charging management IC connected with the capacitor. After the charging compartment management chip internally recognizes the high level, another pin connected with the LED lamp outputs a high level greater than 2.8V to light the LED lamp. In this way, the control circuit in the application can ensure that the key and the Hall sensor are simultaneously applied to the charging management IC (U1) under the condition of a limited number of IO ports of the charging compartment management chip, meet the demand of simultaneously lighting the LED lamp, and greatly save the cost.
[0033] Embodiment two
[0034] Please refer to Figure 4 The earphone charging compartment provided in the embodiment of the application includes a box body 10 and an upper cover 20. The upper cover 20 and the box body 10 are connected through a rotating shaft. Magnets are arranged on the inner sides of the upper cover and the box body (not shown in the figure). The box body further includes a control circuit. The control circuit is as described in the above embodiment one, and will not be described again here.
[0035] The control circuit of the earphone charging bin in the embodiment of the application is electrically connected to the same pin of the charging bin management chip through the switch circuit and the Hall control circuit, the Hall control circuit is connected in series with a capacitor, and the capacitor and the switch circuit are connected in parallel to a pin of the charging bin management chip. When the switch circuit is closed, a pin of the charging bin management chip connected with the switch circuit receives a high level, and after the charging bin management chip internally identifies the high level, another pin connected with the LED lamp outputs a high level greater than 2.8V to light the LED lamp. When the Hall sensor (U2) senses the magnet, a high level is output, at this time, the capacitor C1 absorbs the electric energy, and when the magnet leaves, the Hall sensor (U2) outputs 0V, at this time, the capacitor C1 begins to discharge and gives a high level to the pin of the charging management IC connected with the capacitor, and after the charging bin management chip internally identifies the high level, another pin connected with the LED lamp outputs a high level greater than 2.8V to light the LED lamp. In this way, the earphone charging bin in the application can ensure that the button and the Hall sensor can control the lighting of the LED lamp at the same time under the condition of the limited number of IO ports of the charging bin management chip, and the cost is greatly saved.
[0036] Compared with the earphone charging bin of the prior art, the earphone charging bin in the application is electrically connected to the same pin of the charging bin management chip through the switch circuit and the Hall control circuit, the Hall control circuit is connected in series with a capacitor, and the capacitor and the switch circuit are connected in parallel to a pin of the charging bin management chip. When the switch circuit is closed, a pin of the charging bin management chip connected with the switch circuit receives a high level, and after the charging bin management chip internally identifies the high level, another pin connected with the LED lamp outputs a high level greater than 2.8V to light the LED lamp. When the Hall sensor (U2) senses the magnet, a high level is output, at this time, the capacitor C1 absorbs the electric energy, and when the magnet leaves, the Hall sensor (U2) outputs 0V, at this time, the capacitor C1 begins to discharge and gives a high level to the pin of the charging management IC connected with the capacitor, and after the charging bin management chip internally identifies the high level, another pin connected with the LED lamp outputs a high level greater than 2.8V to light the LED lamp. In this way, the earphone charging bin in the application can ensure that the button and the Hall sensor can control the lighting of the LED lamp at the same time under the condition of the limited number of IO ports of the charging bin management chip, and the cost is greatly saved.
[0037] The preferred embodiments of the present application are described above with reference to the accompanying drawings, and are not intended to limit the scope of the present application. Any modification, equivalent replacement and improvement made by those skilled in the art without departing from the scope and essence of the present application shall be within the scope of the present application.
Claims
1. A control circuit, characterized by The control circuit comprises a charging bin management chip, a switch circuit, a Hall control circuit and an LED lamp control circuit; the switch circuit and the Hall control circuit are electrically connected to the same pin of the charging bin management chip, the LED lamp control circuit is connected to another pin of the charging bin management chip, and the Hall control circuit is connected with a capacitor which is connected in parallel with the switch circuit on the same pin of the charging bin management chip.
2. The control circuit of claim 1, wherein, The switch circuit comprises a switch, one end of the switch is connected to a battery, the other end of the switch is connected to a pin of the charging bin management chip, and the other end of the switch is also connected in parallel with a resistor, and the other end of the resistor is grounded.
3. The control circuit of claim 2, wherein, The Hall control circuit comprises a Hall chip, the first pin, the second pin and the third pin of the Hall chip are grounded, the fourth pin of the Hall chip is connected to a power supply, and the fifth pin of the Hall chip is connected to the capacitor and connected to a pin of the charging bin management chip through the capacitor.
4. The control circuit of claim 2 or 3, wherein, One end of the LED lamp control circuit is connected to a pin of the charging bin management chip, and the other end of the LED lamp control circuit is grounded.
5. The control circuit of claim 1, wherein, The capacity of the capacitor is 10uF.
6. An earphone charging bin comprising a box body and an upper cover, the upper cover and the box body being connected through a rotating shaft, magnets being arranged on the side edges of the upper cover and the box body, and a control circuit being further arranged in the box body. The control circuit comprises a charging bin management chip, a switch circuit, a Hall control circuit and an LED lamp control circuit; the switch circuit and the Hall control circuit are electrically connected to the same pin of the charging bin management chip, the LED lamp control circuit is connected to another pin of the charging bin management chip, and the Hall control circuit is connected with a capacitor which is connected in parallel with the switch circuit on the same pin of the charging bin management chip.
7. The earphone charging pod of claim 6, wherein, The switch circuit comprises a switch, one end of the switch is connected to a battery, the other end of the switch is connected to a pin of the charging bin management chip, and the other end of the switch is also connected in parallel with a resistor, and the other end of the resistor is grounded.
8. The earphone charging pod of claim 6, wherein, The Hall control circuit comprises a Hall chip, the first pin, the second pin and the third pin of the Hall chip are grounded, the fourth pin of the Hall chip is connected to a power supply, and the fifth pin of the Hall chip is connected to the capacitor and connected to a pin of the charging bin management chip through the capacitor.
9. The earphone charging pod of claim 6, wherein, One end of the LED lamp control circuit is connected to a pin of the charging bin management chip, and the other end of the LED lamp control circuit is grounded.
10. The earphone charging pod of claim 6, wherein, The capacity of the capacitor is 10uF.