CN216161085U - External sound card - Google Patents
External sound card Download PDFInfo
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- CN216161085U CN216161085U CN202121434339.4U CN202121434339U CN216161085U CN 216161085 U CN216161085 U CN 216161085U CN 202121434339 U CN202121434339 U CN 202121434339U CN 216161085 U CN216161085 U CN 216161085U
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Abstract
The utility model provides an external sound card, which comprises a sound card mainboard, a rechargeable battery, a power supply interface, a power management chip and a voltage conversion circuit, wherein the rechargeable battery is arranged on the sound card mainboard; the power management chip comprises a power supply interface connecting end, a power supply output end, an equipment plugging and unplugging action detection circuit and an output interruption control circuit of the power supply output end, wherein the detection end of the equipment plugging and unplugging action detection circuit is connected with the power supply interface connecting end, the control signal output end of the equipment plugging and unplugging action detection circuit is connected with the trigger control end of the output interruption control circuit, the power supply interface connecting end is connected with the power supply interface, and the power supply output end is connected with the power supply input end of the sound card mainboard; the input end of the voltage conversion circuit is connected with the rechargeable battery, and the output end of the voltage conversion circuit is connected with the power input end of the sound card mainboard and is connected with the power supply output end of the power management chip in parallel. The external sound card can improve the power supply safety of the sound card mainboard and can also avoid the audio output interruption of the external sound card.
Description
Technical Field
The utility model relates to the technical field of audio, in particular to an external sound card.
Background
With the development of internet entertainment, the live broadcast industry is more and more favored by users, and for this reason, an external sound card matched for live broadcast also comes along, and the external sound card can cooperate with mobile electronic equipment (such as a mobile phone, a tablet computer and the like) of the user to process sound, and can realize rich sound effect.
For satisfying the user and can also charging the demand for mobile electronic device when using external sound card, can make external sound card or external sound card accessory have the function of externally charging, these external sound cards or external sound card accessories can realize power supply control through built-in power management chip, can charge the mobile electronic device who links to each other with it when supplying power to the sound card mainboard (like the sound card mainboard), however, in some external sound cards or external sound card accessories at present, under some circumstances (like the plug of the power interface of charger or mobile electronic device and external sound card is in the twinkling of an eye), the output of power management chip may produce spike pulse, and then cause the harm to the sound card mainboard.
SUMMERY OF THE UTILITY MODEL
Based on the above situation, a primary objective of the present invention is to provide an external sound card, which can improve the power supply safety of a sound card motherboard therein and can avoid the interruption of audio output of the external sound card.
In order to achieve the above object, the technical solution of the present invention provides an external sound card, which includes a sound card motherboard 1, a rechargeable battery 2, and a power supply interface 3, and further includes a power management chip 5 and a voltage conversion circuit 4;
the power management chip 5 comprises a power supply interface connection end 51, a power supply output end 52, an equipment plugging and unplugging action detection circuit 53 and an output interruption control circuit 54 of the power supply output end 52, wherein the detection end of the equipment plugging and unplugging action detection circuit 53 is connected with the power supply interface connection end 51, the control signal output end of the equipment plugging and unplugging action detection circuit 53 is connected with the trigger control end of the output interruption control circuit 54, the power supply interface connection end 51 is connected with the power supply interface 3, and the power supply output end 52 is connected with the power supply input end of the sound card mainboard 1;
the input end of the voltage conversion circuit 4 is connected with the rechargeable battery 2, and the output end of the voltage conversion circuit 4 is connected with the power input end of the sound card main board 1 and is connected with the power supply output end 52 of the power management chip 5 in parallel.
Further, a diode D6 is disposed between the output terminal of the voltage conversion circuit 4 and the sound card main board 1, the positive terminal of the diode D6 is connected to the output terminal of the voltage conversion circuit 4, and the negative terminal of the diode D6 is connected to the power input terminal of the sound card main board 1.
Further, the power management chip 5 has a control terminal 55, and the control terminal 55 of the power management chip 5 is connected to the enable terminal of the voltage conversion circuit 4.
Further, the external sound card comprises an on-off key 6 for turning on or off the sound card main board 1, and the on-off key 6 is connected with a detection end 57 of the power management chip 5.
Further, the external sound card further comprises a data interface 7, and the data interface 7 is connected with the audio data end of the sound card main board 1 and the power supply output end 52 of the power management chip 5.
Further, the data interface 7 is a USB TYPE-C interface.
Further, the power management chip 5 further has a battery charging and discharging terminal 56, and the battery charging and discharging terminal 56 of the power management chip 5 is connected to the rechargeable battery 2.
Further, the voltage conversion circuit 4 includes a boost chip U1.
Further, a filtering and voltage stabilizing circuit is further arranged between the power supply output end 52 of the power management chip 5 and the power supply input end of the sound card main board 1.
Further, the power supply interface 3 is a USB TYPE-C interface.
The utility model provides an external sound card, wherein a power management chip comprises a device plugging action detection circuit and an output interruption control circuit of a power supply output end, can detect the device plugging action of a power supply interface of the external sound card, closes the power supply output of the power supply output end when detecting the device plugging action of the power supply interface, and restarts the power supply output of the power supply output end after closing for a period of time, thus avoiding the damage to a sound card mainboard of the external sound card caused by the peak pulse output of the power management chip at the moment of the device plugging action of the power supply interface, and in the period of time when the power supply output end of the power management chip is closed, a rechargeable battery and a voltage conversion circuit provide power supply voltage for the sound card mainboard, so that the sound card mainboard can continue to normally work, thereby avoiding the audio output interruption of the sound card mainboard caused by the interruption of the power management chip, by the mode, the power supply safety of the sound card mainboard can be improved, and the intermittent audio output of the external sound card can be avoided.
Drawings
Preferred embodiments according to the present application will be described below with reference to the accompanying drawings. In the figure:
fig. 1 is a schematic diagram of an external sound card according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a power management chip according to an embodiment of the utility model;
FIG. 3 is a schematic diagram of a filtering voltage regulator circuit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a voltage conversion circuit according to an embodiment of the present invention.
Detailed Description
The present application is described below based on examples, but the present application is not limited to only these examples. In the following detailed description of the present application, certain specific details are set forth in order to avoid obscuring the nature of the present application, well-known methods, procedures, and components have not been described in detail.
Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.
Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".
In the description of the present application, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.
Referring to fig. 1, fig. 1 is a schematic diagram of an external sound card according to an embodiment of the present invention, where the external sound card includes a sound card motherboard 1, a rechargeable battery 2, a power supply interface 3, a power management chip 5, and a voltage conversion circuit 4;
the power management chip 5 comprises a power supply interface connection end 51, a power supply output end 52, an equipment plugging and unplugging action detection circuit 53 and an output interruption control circuit 54 of the power supply output end 52, wherein the detection end of the equipment plugging and unplugging action detection circuit 53 is connected with the power supply interface connection end 51, the control signal output end of the equipment plugging and unplugging action detection circuit 53 is connected with the trigger control end of the output interruption control circuit 54, the power supply interface connection end 51 is connected with the power supply interface 3, and the power supply output end 52 is connected with the power supply input end of the sound card mainboard 1; the device plugging and unplugging action detection circuit 53 is configured to detect a device plugging and unplugging action of the power supply interface 3, the output interrupt control circuit 54 is configured to realize output interrupt control on the power supply output terminal 52, where the interrupt control specifically refers to turning off the power supply output of the power supply output terminal 52 and restarting the power supply output of the power supply output terminal 52 after the power supply output terminal is turned off for a period of time, and through the power management chip 5, the power supply output terminal provides a first power supply voltage to the sound card motherboard 1, and when the device plugging and unplugging action detection circuit 53 detects a device plugging and unplugging action (an inserting action or a pulling action of an external device) of the power supply interface 3, the output interrupt control circuit 54 is triggered to execute output interrupt control on the power supply output terminal 52, so as to turn off the power supply output of the power supply output terminal 52, and automatically restart the power supply output of the power supply output terminal 52 after the device plugging and unplugging action for a period of time;
for example, the output interrupt control circuit (54) may include a switching circuit.
The input end of the voltage conversion circuit 4 is connected to the rechargeable battery 2, the output end of the voltage conversion circuit 4 is connected to the power input end of the sound card main board 1 and is connected in parallel with the power supply output end 52 of the power management chip 5, the voltage conversion circuit 4 can convert the output voltage of the rechargeable battery 2 into a second power supply voltage, and continuously provide the converted second power supply voltage to the sound card main board 1 at least within the period of time, so as to ensure that the power supply of the sound card main board 1 is not interrupted within the period of time when the power management chip turns off the power supply output of the power supply output end 52 of the power management chip;
the specific structure of the voltage conversion circuit 4 may be determined according to the output voltage of the rechargeable battery and the power supply voltage required by the sound card motherboard, for example, if the output voltage of the rechargeable battery is less than the power supply voltage required by the sound card motherboard, the voltage conversion circuit may be a Boost module, and may specifically include a Boost chip.
In the embodiment of the present invention, the power management chip 5 has a fast charging function, the power supply interface 3 is used for accessing an external device, and the external device supplies power to the external sound card or the external sound card supplies power to the external device, for example, when the external device is a charger or other charging devices, the power supply interface is used as a power input interface of the external sound card, the power management chip 5 can perform corresponding processing on the voltage input by the power supply interface 3 and then respectively supply power to each power consumption component in the external sound card (for example, including providing a first power supply voltage to the sound card motherboard 1), when the external device is a mobile electronic device or other charged devices, the power supply interface 3 is used as a power output interface of the external sound card, and the power management chip 4 can provide the mobile electronic device or other charged devices with the required power supply voltage through the power supply interface 3, for example, the power supply interface 3 may be a USB interface, and the power management chip may perform information identification on an external device connected to the power supply interface 3 to achieve receiving power supply of the external device or supplying power to the external device, for example, the power supply interface 3 may specifically be a USB TYPE-C interface, a Micro USB interface, or a lightning interface.
The external sound card provided by the embodiment of the utility model has the advantages that the power management chip comprises the equipment plugging action detection circuit and the output interruption control circuit of the power supply output end, the equipment plugging action of the power supply interface of the external sound card can be detected, the power supply output of the power supply output end is closed when the equipment plugging action of the power supply interface is detected, and the power supply output of the power supply output end is restarted after the power supply output end is closed for a period of time, so that the damage to the sound card mainboard of the external sound card caused by the spike pulse output by the power management chip at the moment of the equipment plugging action of the power supply interface can be avoided, in addition, the power supply voltage is provided for the sound card mainboard by the rechargeable battery and the voltage conversion circuit within a period of time when the power supply output end of the power management chip is closed, the sound card mainboard can continuously and normally work, and the audio output interruption of the sound card mainboard caused by the interruption of the power management chip can be avoided, by the mode, the power supply safety of the sound card mainboard can be improved, and the intermittent audio output of the external sound card can be avoided.
For example, in one embodiment, the sound card main board 1 of the external sound card may include a DSP chip for sound effect processing, and the DSP chip is disposed on a circuit board in the external sound card.
Preferably, in an embodiment, the power management chip 5 further has a battery charging/discharging terminal 56, the battery charging/discharging terminal 56 of the power management chip 5 is connected to the rechargeable battery 2, and the power management chip 5 can perform charging/discharging management on the rechargeable battery 2, for example, the power management chip can use an external device connected to the power supply interface 3 as a power input to charge the built-in rechargeable battery 2, and can use the built-in rechargeable battery 2 as a power input to supply power to various power consuming components in the external sound card (for example, including providing the first power supply voltage to the sound card main board 1) or supply power to the external device connected to the power supply interface 3.
Preferably, in an embodiment, the external sound card of the present invention further includes a data interface 7 for accessing a mobile electronic device, where the data interface 7 connects an audio data end of the sound card main board 1 and a power supply output end 52 of the power management chip 5, and when the mobile electronic device and the sound card main board 1 perform audio data interaction through the data interface 7, the power management chip 5 may further perform power supply on the mobile electronic device through the data interface 7, specifically, the data interface 6 may include a data pin and a power supply pin, where the data pin is connected to the sound card main board 1 for implementing audio data interaction between the mobile electronic device and the sound card main board 1, and the power supply pin is connected to a power supply output end of the power management chip for implementing power supply of the mobile electronic device by the power management chip 5, and preferably, the data interface 6, The sound card main board 1 is connected to the same power supply output pin of the power management chip 5, that is, the data interface 7 and the sound card main board 1 are powered by the same power supply output pin of the power management chip 5.
The data interface 7 may be a USB interface, and may specifically be a USB TYPE-C interface, a Micro USB interface, or a lightning interface, for example.
Preferably, in an embodiment, a diode is disposed between the output end of the voltage conversion circuit 4 and the sound card motherboard 1, a positive end of the diode is connected to the output end of the voltage conversion circuit 4, a negative end of the diode is connected to the power input end of the sound card motherboard 1, and the diode can prevent the output voltage of the power management chip 5 from being directly input to the voltage conversion circuit, so as to prevent the current from flowing backwards.
Preferably, in an embodiment, the second power supply voltage is smaller than the first power supply voltage, that is, the second power supply voltage provided by the voltage conversion circuit 4 may be slightly smaller than the first power supply voltage provided by the power management chip 5, so that when the power management chip 5 provides the first power supply voltage to the sound card motherboard, the second power supply voltage output by the voltage conversion circuit 4 is not provided to the sound card motherboard, so that the reduction of the power amount of the rechargeable battery 2 may be avoided, for example, the first power supply voltage may be a voltage around 5V, and the second power supply voltage may be a voltage around 4V.
Preferably, in an embodiment of the external sound card provided by the present invention, the power management chip 5 has a control terminal 55, the control terminal 55 of the power management chip 5 is connected to the enable terminal of the voltage conversion circuit 4 to enable and control the voltage conversion circuit 4, for example, when the power management chip 5 detects a turn-on signal of the sound card main board 1, the power management chip starts to provide the first power supply voltage to the sound card main board 1 and turns on the voltage conversion circuit 4; when the closing signal of the sound card main board 1 is detected, the supply of the first power supply voltage to the sound card main board 1 is stopped, and the voltage conversion circuit 4 is closed.
For example, the external sound card includes an on-off key 6 for turning on or off the sound card motherboard 1, the on-off key 6 is connected to a detection end 57 of the power management chip 5, and the on-off key can output an on signal or an off signal of the sound card motherboard 1 to the power management chip 5 according to user operation and control, specifically, when the power management chip 5 detects the on signal of the sound card motherboard, a power supply output end connected to the sound card motherboard 1 starts to output a first power supply voltage, so that the sound card motherboard 1 starts to operate, and at the same time, the power management chip 5 turns on the voltage conversion circuit 4, so that the voltage conversion circuit 4 starts to operate, thereby preventing the sound card motherboard 1 from stopping operating due to the interruption of the output of the power management chip 5 when the sound card motherboard 1 operates; when the closing signal of the sound card mainboard is detected, the power management chip 5 controls the power supply output end connected to the sound card mainboard to close the output, and simultaneously closes the voltage conversion circuit 4, the voltage conversion circuit 4 stops working, and the second power supply voltage can not be provided for the sound card mainboard any more, so that the sound card mainboard is closed.
The power management chip in the embodiment of the utility model can adopt the existing chip;
for example, in an embodiment of the external sound card provided by the present invention, the power management chip 4 may be an IP5358 chip, for example, referring to fig. 2, the 44 th pin and the 45 th pin of the IP5358 chip U3 are connected as a power supply output terminal, which is connected to the positive terminal of a diode D21, the negative terminal VOUT1 of the diode D21 is connected to the power supply input terminal of the sound card main board 1 and the power supply pin of the data interface 6, and is capable of providing a first power supply voltage to the sound card main board 1 and the data interface 6, the battery charging and discharging terminals include the 3 rd pin, the 4 th pin, the 5 th pin, the 6 th pin, the 8 th pin, the 19 th pin and the 20 th pin of the IP5358 chip U3, wherein the 3 rd pin, the 4 th pin, the 5 th pin, the 6 th pin and the 7 th pin of the IP5358 chip U2 are connected to the first terminal of an inductor L2, the first terminal of the inductor L2 is further connected to the 8 th pin of the IP5358 chip 493 2 through a capacitor C17, the second terminal of the inductor L2 is connected to the IP5358 and the first pin of the rechargeable battery p 3, the power supply interface connection end 51 comprises a 15 th pin, a 16 th pin, a 28 th pin, a 29 th pin, a 30 th pin and a 31 th pin of the IP5358 chip U3, the power supply interface 3 is connected, the 25 th pin of the IP5358 chip U3 is used as a detection end 57 to be connected with the switch key 6 so as to detect the opening signal or the closing signal of the sound card mainboard 1, and the 10 th pin of the IP5358 chip U3 is used as a control end 55 to be connected with the voltage conversion circuit 4 so as to enable and control the voltage conversion circuit 4.
Preferably, in an embodiment, a filtering and voltage stabilizing circuit is further disposed between the power supply output terminal 52 of the power management chip 5 and the power supply input terminal of the sound card main board 1, referring to fig. 3, the filtering and voltage stabilizing circuit may include an inductor R22 and capacitors C6, C7 and C8, wherein a first terminal of the inductor R22 is connected to the power supply output terminal of the power management chip 4 (negative terminal VOUT1 of diode D21), a second terminal of the inductor R22 is connected to the power supply input terminal VIN of the sound card main board and the first terminals of the capacitors C6, C7 and C8, and a second terminal of the capacitor C6, a second terminal of C7 and a second terminal of C8 are grounded.
For example, in an embodiment, referring to fig. 4, the voltage converting circuit 5 includes an SGM6605 chip U1, wherein pin 1 of the SGM6605 chip U1 is connected to pin 6 of the SGM6605 chip U1 and the rechargeable battery 2 through an inductor L1, pin 3 (enable pin) of the SGM6605 chip U1 is connected to a power management chip (e.g., pin 10 of the IP5358 chip), pin 5 of the SGM6605 chip U1 is connected to the power supply input terminal VIN of the sound card main board through a diode D6, pin 5 of the SGM6605 chip U1 is further connected to a first terminal of a resistor R21, and a second terminal of the resistor R21 is connected to pin 4 of the SGM6605 chip U1 and to ground through a resistor R23.
It will be appreciated by those skilled in the art that the above-described preferred embodiments may be freely combined, superimposed, without conflict.
It will be understood that the embodiments described above are illustrative only and not restrictive, and that various obvious and equivalent modifications and substitutions for details described herein may be made by those skilled in the art without departing from the basic principles of the utility model.
Claims (10)
1. An external sound card comprises a sound card mainboard (1), a rechargeable battery (2) and a power supply interface (3), and is characterized by further comprising a power management chip (5) and a voltage conversion circuit (4);
the power management chip (5) comprises a power supply interface connecting end (51), a power supply output end (52), an equipment plugging and unplugging action detection circuit (53) and an output interruption control circuit (54) of the power supply output end (52), wherein the detection end of the equipment plugging and unplugging action detection circuit (53) is connected with the power supply interface connecting end (51), the control signal output end of the equipment plugging and unplugging action detection circuit (53) is connected with the trigger control end of the output interruption control circuit (54), the power supply interface connecting end (51) is connected with the power supply interface (3), and the power supply output end (52) is connected with the power supply input end of the sound card mainboard (1);
the input end of the voltage conversion circuit (4) is connected with the rechargeable battery (2), and the output end of the voltage conversion circuit (4) is connected with the power input end of the sound card mainboard (1).
2. The external sound card according to claim 1, wherein a diode (D6) is disposed between the output terminal of the voltage conversion circuit (4) and the power input terminal of the sound card main board (1), the positive terminal of the diode (D6) is connected to the output terminal of the voltage conversion circuit (4), and the negative terminal of the diode (D6) is connected to the power input terminal of the sound card main board (1).
3. The external sound card according to claim 1, wherein the power management chip (5) has a control terminal (55), and the control terminal (55) of the power management chip (5) is connected to the enable terminal of the voltage conversion circuit (4).
4. The external sound card according to claim 1, wherein the external sound card comprises an on-off key (6) for turning on or off the sound card main board (1), and the on-off key (6) is connected to a detection terminal (57) of the power management chip (5).
5. The external sound card according to claim 1, further comprising a data interface (7), wherein the data interface (7) connects an audio data terminal of the sound card main board (1) and the power supply output terminal (52) of the power management chip (5).
6. The external sound card according to claim 5, wherein the data interface (7) is a USB TYPE-C interface.
7. The external sound card according to claim 1, wherein the power management chip (5) further has a battery charging and discharging terminal (56), and the battery charging and discharging terminal (56) of the power management chip (5) is connected to the rechargeable battery (2).
8. The external sound card according to any of the claims 1-7, wherein the voltage conversion circuit (4) comprises a boost chip (U1).
9. The external sound card according to any of the claims 1-7, wherein a filter voltage regulator circuit is further disposed between the power supply output terminal (52) of the power management chip (5) and the power supply input terminal of the sound card main board (1).
10. The external sound card according to any of the claims 1-7, wherein the power supply interface (3) is a USB TYPE-C interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121434339.4U CN216161085U (en) | 2021-06-25 | 2021-06-25 | External sound card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121434339.4U CN216161085U (en) | 2021-06-25 | 2021-06-25 | External sound card |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216161085U true CN216161085U (en) | 2022-04-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121434339.4U Active CN216161085U (en) | 2021-06-25 | 2021-06-25 | External sound card |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216161085U (en) |
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2021
- 2021-06-25 CN CN202121434339.4U patent/CN216161085U/en active Active
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