CN209963769U - Circuit for USB key - Google Patents
Circuit for USB key Download PDFInfo
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- CN209963769U CN209963769U CN201920387811.XU CN201920387811U CN209963769U CN 209963769 U CN209963769 U CN 209963769U CN 201920387811 U CN201920387811 U CN 201920387811U CN 209963769 U CN209963769 U CN 209963769U
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Abstract
A circuit for a USB key, comprising: the charging device comprises a USB plug-in interface module, a charging module and a control module, wherein the USB plug-in interface module is connected with the charging module, and the charging module is connected with the control module. The charging module comprises a charging circuit module and a short-circuit resistor module; the control module comprises a system main control module and a battery module; and in different modes, the system main control module is connected with the charging circuit module or the short-circuit resistance module. The utility model discloses a common USB key of same circuit board and the multi-application production of bluetooth key are accomplished to the different configurations of BOM material, realize production inventory and cost optimization.
Description
Technical Field
The utility model relates to a U shield hardware development field generally, more specifically relates to the circuit layout field of the many applications of PCB to U shield.
Background
In the hardware development of the U shield, a USB key of a generation and a Bluetooth key with a Bluetooth function are required to be designed for the same main chip product. The two keys adopt the same main chip, namely a Bluetooth key with a Bluetooth function and a common USBKey without the Bluetooth function. Manufacturers generally produce the two keys in a matching way, but due to the difference in the bluetooth function, the prior art designs the circuit of the PCB for the two keys separately. However, since the two keys are different only in whether the bluetooth function is provided or not, the keys for completing the two circuit boards using two circuit designs cannot achieve production inventory and cost optimization for production and cost.
In order to solve the above problems, a new key-oriented circuit layout for multiple applications of the PCB is needed, which can complete multiple applications production of the common USB key and the bluetooth key of the same circuit board through different configurations of BOM materials, thereby achieving production inventory and cost optimization.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems, a new circuit for a USB key is needed, which can complete multi-application production of a non-bluetooth mode USB key and a bluetooth mode key of the same circuit board by different configurations of BOM materials, thereby achieving production inventory and cost optimization.
In order to achieve the above object, the utility model discloses a circuit layout to the PCB multi-application of key is realized like this: a first technical solution is a circuit for a USB key, comprising: the charging device comprises a USB plug-in interface module, a charging module and a control module, wherein the USB plug-in interface module is connected with the charging module, and the charging module is connected with the control module.
A second technical solution is based on the first technical solution, and is characterized in that the charging module comprises a charging circuit module and a short-circuit resistance module; the control module comprises a system main control module and a battery module; and in different modes, the system main control module is connected with the charging circuit module or the short-circuit resistance module.
The third technical solution is based on the second technical solution, and is characterized in that when the USB key is in the bluetooth mode, the circuit includes a first node and a second node; wherein the USB plug-in interface module is connected with the first node; a first end of the charging circuit module is connected with the first node, and a second end of the charging circuit module is connected with the second node; the system main control module is connected with the second node; the battery module is connected with the second node; at this time, the short circuit resistance module is disconnected from the charging circuit module, the battery module and the system main control module in the circuit.
The fourth technical solution is based on the third technical solution, and is characterized in that the charging circuit module is configured to charge the battery module and supply power to the system main control module.
A fifth technical solution is based on the fourth technical solution, and is characterized in that when the USB plug-in interface module is not connected to an external device and is operating, the battery module outputs current to supply power to the system control module to ensure its operation.
A sixth technical solution is based on the second technical solution, and is characterized in that when the USB key is in the non-bluetooth mode, the circuit includes a first node and a second node; wherein the content of the first and second substances,
the USB plug-in interface module is connected with the first node; a first end of the short-circuit resistance module is connected with the first node, and a second end of the short-circuit resistance module is connected with the second node; the system main control module is connected with the second node;
at this time, the resistance value of the short-circuit resistance module is set to be zero, the charging circuit module is short-circuited, and the charging circuit module is disconnected with the short-circuit resistance module, the battery module and the system main control module in the circuit.
A seventh technical solution is based on the sixth technical solution, and is characterized in that the short circuit resistance module is configured to short circuit the charging circuit module and supply power to the system main control module when the resistance value of the short circuit resistance module is set to be zero.
The eighth technical means is based on the seventh technical means, and the specific operation of setting the resistance value of the short-circuit resistance module to zero is to adopt a 0 Ω resistor as the short-circuit resistance module.
A ninth technical solution is based on any one of the second to eighth technical solutions, and is characterized in that a charging chip SGM4056 is adopted in the charging circuit module.
A tenth technical means is the ninth technical means, wherein when the USB plug-in interface is connected to an external power supply device, the output voltage is 5V.
The utility model has the advantages and beneficial effect: through the utility model discloses accomplish the general USB key of same circuit board and the multi-application production of bluetooth key to the different configurations of BOM material, realize production stock and cost optimization.
Drawings
Fig. 1 shows a circuit diagram of a USB key according to an embodiment of the present invention;
fig. 2 shows a circuit diagram of a bluetooth USB key according to the technical solution of the present invention;
fig. 3 shows a circuit diagram of a non-bluetooth USB key according to the present invention;
fig. 4 shows a schematic diagram of the layout of the short-circuit resistor module and the charging circuit module in the technical solution of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein reference numerals refer to elements and techniques of the present invention so that advantages and features of the present invention may be more readily understood when implemented in a suitable environment. The following description is an embodiment of the present invention, and other embodiments related to the claims that are not explicitly described also fall within the scope of the claims. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
Fig. 1 shows a schematic diagram of a circuit diagram of a USB key according to an embodiment of the present invention.
As shown in fig. 1, a circuit for a USB key, comprising: the charging device comprises a USB plug-in interface module, a charging module and a control module, wherein the USB plug-in interface module is connected with the charging module, and the charging module is connected with the control module.
The utility model discloses in, realize the multi-use in same set of PCB circuit layout, what lean on is to design into unified circuit layout with different circuit layouts. Because the utility model discloses a bluetooth USB key and the non-bluetooth USB key of same money U shield use the same PCB to make the version and make production, unify the circuit of the different charge mode of bluetooth USB key and non-bluetooth USB key so firstly the utility model discloses a key point, the event unifys whole hardware module one-tenth charging module and control module to reach the utility model discloses a key means of purpose.
In the prior art, when a bluetooth key and a non-bluetooth ordinary usb key of the same main chip product of a U shield are to be designed, a PCB is respectively patterned for circuit layouts of the two keys and then the PCB is put into production according to the patterned PCB. The main chips of the circuit layouts of the two keys are the same, and the only difference is that the main chips are charged and supplied with power. When the Bluetooth key is not connected with an external device, the Bluetooth key is powered by the battery module of the Bluetooth key, and when the Bluetooth key is connected with the external device, the battery module of the Bluetooth key is charged by current flowing in from the external device; when the common non-Bluetooth key is not connected with an external device, the power is not supplied, the key cannot work, and when the external device is connected, the current of the external device enters the system main control module of the key to supply power to the key so as to enable the key to operate. For the difference of power supply and charging, a set of uniform Printed Circuit Board (PCB) circuit layout is not provided in the prior art, so that the circuit layout can be switched between the circuit layout of a Bluetooth key and the circuit layout of a non-Bluetooth common USB key after being slightly changed.
And the utility model discloses realize many applications in same set of PCB circuit layout, can accomplish the circuit layout of different charging and power supply modes on the same circuit board through the different configurations to the BOM material, finally reach one set of purpose of making version PCB circuit layout production two kinds of hardware products.
Furthermore, the charging module comprises a charging circuit module and a short-circuit resistance module; the control module comprises a system main control module and a battery module; and in different modes, the system main control module is connected with the charging circuit module or the short-circuit resistance module.
Further, as shown in fig. 2, when the USB key is in the bluetooth mode, the circuit includes a first node and a second node; wherein the USB plug-in interface module is connected with the first node; a first end of the charging circuit module is connected with the first node, and a second end of the charging circuit module is connected with the second node; the system main control module is connected with the second node; the battery module is connected with the second node; at this time, the short circuit resistance module is disconnected from the charging circuit module, the battery module and the system main control module in the circuit.
At this time, the second node may be connected to the charging circuit module, the battery module and the system main control module, or may be a connection point at which the second node is connected to the charging circuit module, the battery module and the system main control module, respectively. The utility model discloses in, when the hardware that we need produce at last according to the PCB board is the bluetooth key, the U shield of design this moment needs charging circuit module and battery module, so will weld charging circuit on charging circuit module, weld the battery on battery module, do not weld any circuit on the short circuit resistance module, there is not short circuit resistance module, the charging circuit module just can only be walked to the electric current that comes in from external device, then the electric current flows in battery module through charging circuit and charges, the electric current also flows in system host system and guarantees its operation simultaneously.
Furthermore, the charging circuit module is used for charging the battery module and supplying power to the system main control module.
At this time, it is further clarified that the charging circuit module is required to charge the battery module to satisfy both the battery power supply when the battery module is independently operated when the external power supply device is connected and the power supply of the system main control module to satisfy the operation.
Furthermore, when the Bluetooth key is not connected with an external device to operate, the battery module outputs current to supply power to the system control module so as to ensure the operation of the system control module.
The utility model discloses in, further describe the bluetooth key when not connecting the external device, when independent operation, how to realize the power supply. When the Bluetooth key operates independently, the charged battery module supplies power to the system main control module to ensure the operation of the system main control module.
According to another embodiment of the present invention, the PCB multi-application circuit layout shown in the schematic diagram of fig. 1 is further based, wherein, as shown in fig. 3, when the USB key is in the non-bluetooth mode, the circuit includes a first node and a second node; wherein the USB plug-in interface module is connected with the first node; a first end of the short-circuit resistance module is connected with the first node, and a second end of the short-circuit resistance module is connected with the second node; the system main control module is connected with the second node; at this time, the resistance value of the short-circuit resistance module is set to be zero, the charging circuit module is short-circuited, and the charging circuit module is disconnected with the short-circuit resistance module, the battery module and the system main control module in the circuit.
The utility model discloses in, when the hardware that we need produce according to the PCB board is the ordinary USB key of non-bluetooth, hardware this moment is the hardware that only connects the outside device and can supply power work, the U shield that designs when so does not need charging circuit module and battery module, the event welds the short circuit resistance module, its resistance is established to zero, establish short circuit resistance into a 0 omega's resistance, for example, do not weld battery module, do not weld charging circuit module, let the short circuit resistance module of zero resistance fall charging circuit module short circuit completely, when the outside device flowed into short circuit resistance module through the module of inserting of key, only flow into system host system and supply power and guarantee its operation.
The charging circuit module is further characterized by comprising a short-circuit resistor module, a charging circuit module and a system main control module, wherein the short-circuit resistor module is used for setting the resistance value to be zero, and short-circuiting the charging circuit module and supplying power to the system main control module.
Here, it is further explained that the short-circuit resistor is a resistor set to a zero resistance value to short-circuit the charging circuit module, so that the external current directly flows into the system main control module only through the short-circuit resistor module.
Further, it is characterized in that the specific operation of setting the resistance value of the short-circuit resistance module to zero is to use a 0 Ω resistor as the short-circuit resistance module.
The specific operation of setting the short-circuit resistor to zero is further explained here, that is, using a 0 Ω resistor, in the actual case we usually use a wire as the 0 Ω resistor.
Further, based on any of the above embodiments, the charging circuit module employs the charging chip SGM4056 as shown in the circuit layout diagram of fig. 4.
If the chip in fig. 4 is a charging chip, the charging function in the charging circuit module is realized, R16 is a short-circuit resistor in the short-circuit resistor module, when R16 is set to 0 Ω, the charging chip is short-circuited, and a current generated by an external 5V voltage flows through the short-circuit resistor of 0 Ω. The model of the charging chip in the charging circuit module is SGM4056, which is a commonly used charging chip.
Furthermore, when the USB plug-in interface is connected with an external power supply device, the output voltage is 5V.
It is further clarified here that the external voltage output value received by the USB plug-in interface is 5V.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (9)
1. A circuit for a USB key, comprising: a USB plug-in interface module, a charging module and a control module, wherein the USB plug-in interface module is connected with the charging module, the charging module is connected with the control module,
the charging module comprises a charging circuit module and a short-circuit resistor module;
the control module comprises a system main control module and a battery module;
and in different modes, the system main control module is connected with the charging circuit module or the short-circuit resistance module.
2. The circuit of claim 1,
when the USB key is in a Bluetooth mode, the circuit comprises a first node and a second node; wherein the content of the first and second substances,
the USB plug-in interface module is connected with the first node; a first end of the charging circuit module is connected with the first node, and a second end of the charging circuit module is connected with the second node; the system main control module is connected with the second node; the battery module is connected with the second node;
at this time, the short circuit resistance module is disconnected from the charging circuit module, the battery module and the system main control module in the circuit.
3. The circuit of claim 2,
and the charging circuit module is used for charging the battery module and supplying power to the system main control module.
4. The circuit of claim 3,
when the USB plug-in interface module is not connected with an external device and operates, the battery module outputs current to supply power to the system main control module so as to ensure the operation of the system main control module.
5. The circuit of claim 1,
when the USB key is in a non-Bluetooth mode, the circuit comprises a first node and a second node; wherein the content of the first and second substances,
the USB plug-in interface module is connected with the first node; a first end of the short-circuit resistance module is connected with the first node, and a second end of the short-circuit resistance module is connected with the second node; the system main control module is connected with the second node;
at this time, the resistance value of the short-circuit resistance module is set to be zero, the charging circuit module is short-circuited, and the charging circuit module is disconnected with the short-circuit resistance module, the battery module and the system main control module in the circuit.
6. The circuit of claim 5,
and the short-circuit resistance module is used for setting the resistance value to be zero, short-circuiting the charging circuit module and supplying power to the system main control module.
7. The circuit of claim 6, wherein the short-circuit resistor module is set to zero by using a 0 Ω resistor as the short-circuit resistor module.
8. The circuit according to any one of claims 1-7, wherein a charging chip SGM4056 is adopted in the charging circuit module.
9. The circuit of claim 8, wherein the output voltage is 5V when the USB plug-in interface is connected to an external power supply device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920387811.XU CN209963769U (en) | 2019-03-25 | 2019-03-25 | Circuit for USB key |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920387811.XU CN209963769U (en) | 2019-03-25 | 2019-03-25 | Circuit for USB key |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209963769U true CN209963769U (en) | 2020-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920387811.XU Active CN209963769U (en) | 2019-03-25 | 2019-03-25 | Circuit for USB key |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209963769U (en) |
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2019
- 2019-03-25 CN CN201920387811.XU patent/CN209963769U/en active Active
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