CN218848975U - Integrated circuit board suitable for electron class tablet - Google Patents
Integrated circuit board suitable for electron class tablet Download PDFInfo
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- CN218848975U CN218848975U CN202223154425.7U CN202223154425U CN218848975U CN 218848975 U CN218848975 U CN 218848975U CN 202223154425 U CN202223154425 U CN 202223154425U CN 218848975 U CN218848975 U CN 218848975U
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Abstract
The utility model discloses an integrated circuit board suitable for electron class tablet, which comprises an AC/DC conversion module, a core circuit module and a power supply control module connected between the AC/DC conversion module and the core circuit module, wherein a self-recovery fuse F1 is arranged between the AC/DC conversion module and the power supply control module; the direct current power supply system comprises a DC power supply socket J1 which is parallel to the alternating current-direct current conversion module, and the DC power supply socket J1 is connected to a joint of the alternating current-direct current conversion module and a self-recovery fuse F1. Compared with the prior art, the utility model has the advantages that in the first aspect, the self-recovery fuse is arranged at the power end, so that the overcurrent protection effect can be realized, and the circuit board can be prevented from being burnt out; and in the second aspect, a DC power supply socket which is parallel to the direct current power supply end is arranged, if the alternating current-direct current conversion module fails, the DC power supply socket can be connected with a power supply through an external power adapter, and the electronic class board circuit board can obtain the power supply from the DC power supply socket, so that the electronic class board can be normally used.
Description
Technical Field
The utility model relates to a circuit board technical field especially relates to an integrated circuit board suitable for electron class tablet.
Background
With the development of science and technology, electronic teaching products, such as electronic whiteboards (traditional blackboard substitute products), electronic class boards (traditional class board substitute products), and the like, are gradually popularized in many schools. The electronic class board is usually installed at the entrance of a classroom and used for displaying various information such as school notices, class information, class activity photos, today's courses, weekly schedules, school schedules, examination attendance and the like in real time. The existing electronic class cards have the following two defects: (1) Most electronic class cards are provided with USB interfaces for connecting the electronic class cards with external equipment, and when the USB equipment is plugged in and pulled out, the main boards of the electronic class cards are burnt out due to overcurrent; (2) Most electronic class boards are only provided with a power line interface, alternating current is converted into direct current through a built-in alternating current-direct current conversion module and then the direct current is supplied to electronic devices in the electronic class boards, if the built-in alternating current-direct current conversion module breaks down, maintenance personnel need to disassemble the electronic class boards to replace the built-in alternating current-direct current conversion module, the electronic class boards can be continuously used after being re-installed, and if the maintenance personnel cannot carry out maintenance treatment in time, the electronic class boards cannot be normally used for a period of time.
Disclosure of Invention
The utility model aims to solve the technical problem that an integrated circuit board suitable for electron class tablet is provided, it can prevent that electron class tablet circuit board from causing overflowing because of plug USB equipment and burning out, can also guarantee that electron class tablet can normal use when the built-in alternating current-direct current conversion module of electron class tablet damages.
In order to solve the technical problem, the utility model provides an integrated circuit board suitable for electron class tablet, including alternating current-direct current conversion module, core circuit module and connect the power supply control module between alternating current-direct current conversion module and core circuit module, be equipped with self-resuming fuse F1 between alternating current-direct current conversion module and power supply control module; the direct current power supply system comprises a DC power supply socket J1 which is parallel to the alternating current-direct current conversion module, and the DC power supply socket J1 is connected to a joint of the alternating current-direct current conversion module and a self-recovery fuse F1.
Further, the power supply control module comprises a switching tube for controlling the on-off of the power supply control module and a differential pressure control unit for controlling the on/off of the switching tube.
Further, the switch tube is a field effect tube and/or the differential pressure control unit is a triode.
Furthermore, the number of the switching tubes is two, the two switching tubes are connected in parallel, and the differential pressure control unit is connected with the two switching tubes which are connected in parallel.
Furthermore, the power supply control module also comprises a filter capacitor connected to the output end of the switch tube.
Further, a voltage stabilizing module is connected between the self-recovery fuse F1 and the power supply control module.
Further, the voltage regulation module includes a resistor R1709 and a zener diode D2107 connected in series.
Furthermore, the input end of the pressure difference control unit is connected with a key for the user to operate.
Compared with the prior art, the integrated circuit board suitable for the electronic class board of the utility model has the advantages that on the one hand, the self-recovery fuse is arranged at the power end, if the USB device is plugged in and out to cause the overcurrent of the circuit board of the electronic class board, the self-recovery fuse is immediately fused to play a role in overcurrent protection, so that the circuit board is ensured not to be burnt out, and the electronic class board can be continuously electrified and used after the self-recovery fuse is automatically recovered; and in the second aspect, a DC power supply socket which is parallel to the direct current power supply end is arranged, when the alternating current-direct current conversion module works normally, the electronic class board circuit board obtains power from the alternating current-direct current conversion module through the direct current power supply end, the DC power supply socket is idle, if the alternating current-direct current conversion module fails, the DC power supply socket can be connected with the power through an external power adapter, then the electronic class board circuit board can obtain the power from the DC power supply socket, and the electronic class board can be ensured to be normally used when the built-in alternating current-direct current conversion module of the electronic class board is damaged.
Drawings
Fig. 1 is a logic block diagram of an integrated circuit board suitable for an electronic class board provided by the present invention;
fig. 2 is a schematic diagram of a circuit between the DC power supply socket, the self-recovery fuse and the power supply control module of the integrated circuit board of the electronic class board provided by the present invention.
Detailed Description
The invention is described in further detail below with reference to specific embodiments.
The embodiment provides an integrated circuit board suitable for an electronic class board as shown in fig. 1, which includes an ac/dc conversion module, a core circuit module, and a power supply control module 1 connected between the ac/dc conversion module and the core circuit module. In this embodiment, the circuit modules on the integrated circuit board of the electronic class board are divided into a power utilization side and a power supply side, specifically, the ac-dc conversion module and the power supply control module 1 serve as the power supply side to supply power to the core circuit module serving as the power utilization side (in this example, the core circuit module refers to a set of functional circuit units commonly used by the electronic class board, such as a set of a voice playing circuit unit, an LVDS display circuit unit, a WIFI module, a USB2.0 interface, an ethernet, and a serial port).
As shown in fig. 2, the power supply control module 1 includes fets Q26 and Q7029 connected in parallel, and a transistor Q2313 for controlling the fets Q26 and Q7029 to turn on/off. The transistor Q2313 serves as a voltage difference control unit, and the base (i.e., the input end) thereof is connected to a key (VIN _ EN port is the signal end of the key in the figure) for user operation through a resistor R1820. If the VIN _ EN signal terminal is floated by the operation of the key of the user, the triode Q2313 is cut off, and the voltage difference V between the grid electrode G and the source electrode S of the field effect transistors Q26 and Q7029 GS When the voltage is larger than the conduction voltage, the field effect transistors Q26 and Q7029 are conducted, namely the power supply control module 1 is conducted, and power supply for the core circuit module is achieved. The power supply control module 1 further includes a filter capacitor connected to the drains (i.e., output terminals) of the fets Q26 and Q7029, so as to stabilize the voltage supplied to the core circuit module by the power supply control module 1. If the VIN _ EN signal terminal is grounded by the operation of the key by the user, the triode Q2313 is conducted, and the voltage difference V between the grid G and the source S of the field effect transistors Q26 and Q7029 GS And when the voltage is less than the turn-on voltage, the field effect transistors Q26 and Q7029 are turned off, namely the power supply control module 1 is switched off, and the core circuit module is not supplied with power. In the embodiment, the two field effect transistors connected in parallel are used for controlling the on-off of the power supply, and the two field effect transistors are conducted together to increase the total output power of the power supply control module 1. Not preferred, only one field may be used insteadThe effect tube controls the on-off of the power supply.
As shown IN fig. 2, VCC _ IN is a dc power supply terminal of the ac/dc conversion module, and IN order to prevent the electronic class board circuit board from being burned out due to overcurrent when the USB device is plugged IN or unplugged from the electronic class board circuit board, the integrated circuit board of this embodiment is provided with a self-recovery fuse F1 between the dc power supply terminal VCC _ IN of the ac/dc conversion module and the power supply control module 1. This integrated circuit board realizes overcurrent protection through this self resuming fuse F1, if caused the electronic class tablet circuit board to overflow at the in-process of USB equipment plug, the self resuming fuse can be fused immediately and play overcurrent protection effect, guarantees can not burn out the circuit board, treats that USB equipment plug finishes the back, and the electric current resumes normally, then the self resuming fuse can be from the recovery after a period of time, so the electronic class tablet just can continue to go up the electricity and use. As shown in fig. 2, the zener diode D2107 is connected in series with the resistor R1709 and then connected to the power supply main circuit between the self-recovery fuse F1 and the power supply control module 1, so as to provide a stable voltage for the core circuit module. The zener diode is also coupled to the base of the transistor Q2313 through a resistor R1711 to provide a regulated voltage to the transistor Q2313.
The existing electronic class board is only provided with a power line interface, and the built-in AC-DC conversion module converts AC into DC and then supplies power to a core circuit module in the electronic class board, if the built-in AC-DC conversion module fails, a maintenance worker needs to disassemble the electronic class board to replace the built-in AC-DC conversion module, the electronic class board can be continuously used after being reinstalled, and if the maintenance worker cannot timely perform maintenance, the electronic class board cannot be normally used for a period of time. In order to enable the electronic class board to continue to be normally used under the condition that the built-in ac/DC conversion module fails, the integrated circuit board is designed to have two power supply modes, specifically, the integrated circuit board includes a DC power supply socket J1 parallel to the ac/DC conversion module, as shown in fig. 2, the DC power supply socket J1 is connected to a contact 2 between the ac/DC conversion module and a self-recovery fuse F1. When the alternating current-direct current conversion module works normally, the electronic class board circuit board obtains power from the alternating current-direct current conversion module through the direct current power supply end VCC _ IN, the DC power supply socket is idle, if the alternating current-direct current conversion module breaks down, the DC power supply socket can be connected with the power through the external power adapter, and at the moment, the electronic class board circuit board can obtain the power from the DC power supply socket, so that the electronic class board can be used normally.
The above description is only the embodiments of the present invention, and the scope of protection is not limited thereto. The insubstantial changes or substitutions will now be made by those skilled in the art based on the teachings of the present invention, which fall within the scope of the claims.
Claims (8)
1. The utility model provides an integrated circuit board suitable for electron class tablet, includes AC/DC conversion module, core circuit module and connects power supply control module (1) between AC/DC conversion module and core circuit module, characterized by: a self-recovery fuse F1 is arranged between the alternating current-direct current conversion module and the power supply control module (1); the direct current power supply system comprises a DC power supply socket J1 which is parallel to the alternating current-direct current conversion module, and the DC power supply socket J1 is connected to a joint (2) of the alternating current-direct current conversion module and a self-recovery fuse F1.
2. The integrated circuit board suitable for the electronic class board as claimed in claim 1, wherein: the power supply control module (1) comprises a switch tube for controlling the on-off of the power supply control module (1) and a differential pressure control unit for controlling the on-off of the switch tube.
3. The integrated circuit board suitable for the electronic class board as claimed in claim 2, wherein: the switch tube is a field effect tube and/or the differential pressure control unit is a triode.
4. The integrated circuit board suitable for the electronic class board as claimed in claim 2, wherein: the number of the switching tubes is two, the two switching tubes are connected in parallel, and the pressure difference control unit is connected with the two switching tubes which are connected in parallel.
5. The integrated circuit board suitable for the electronic class board as claimed in claim 2, wherein: the power supply control module (1) also comprises a filter capacitor connected at the output end of the switch tube.
6. The integrated circuit board suitable for the electronic class board as claimed in claim 1, wherein: and a voltage stabilizing module is connected between the self-recovery fuse F1 and the power supply control module (1).
7. The integrated circuit board suitable for the electronic class board as claimed in claim 6, wherein: the voltage stabilizing module comprises a resistor R1709 and a voltage stabilizing diode D2107 which are connected in series.
8. The integrated circuit board suitable for the electronic class board as claimed in claim 2, wherein: the input end of the pressure difference control unit is connected with a key for the operation of a user.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223154425.7U CN218848975U (en) | 2022-11-25 | 2022-11-25 | Integrated circuit board suitable for electron class tablet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223154425.7U CN218848975U (en) | 2022-11-25 | 2022-11-25 | Integrated circuit board suitable for electron class tablet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218848975U true CN218848975U (en) | 2023-04-11 |
Family
ID=87295741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223154425.7U Active CN218848975U (en) | 2022-11-25 | 2022-11-25 | Integrated circuit board suitable for electron class tablet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218848975U (en) |
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2022
- 2022-11-25 CN CN202223154425.7U patent/CN218848975U/en active Active
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