CN219394479U - Power supply switching output circuit, power supply switching circuit board and image pickup device - Google Patents
Power supply switching output circuit, power supply switching circuit board and image pickup device Download PDFInfo
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- CN219394479U CN219394479U CN202320042832.4U CN202320042832U CN219394479U CN 219394479 U CN219394479 U CN 219394479U CN 202320042832 U CN202320042832 U CN 202320042832U CN 219394479 U CN219394479 U CN 219394479U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
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Abstract
The utility model discloses a power supply switching output circuit, a power supply switching circuit board and an image pickup device, wherein the power supply switching output circuit comprises a first power supply circuit and at least one second power supply circuit, the first power supply circuit comprises a first power supply module and a first power supply module, and the second power supply circuit comprises a second power supply module, a first unidirectional diode, a second unidirectional diode and a second power utilization module; the first power module is connected in series with the first power module, the first power module is connected in series with the input end of the first unidirectional diode, the second power module is connected in series with the input end of the second unidirectional diode, and the output end of the first unidirectional diode and the output end of the second unidirectional diode are connected in parallel and then connected in series with the second power module. The power supply switching output circuit can meet the power-on sequence requirement of equipment when a product is provided with a plurality of power-on modules and the power-on sequence of the power-on modules is wrong, and the circuit is low in cost, small in occupied space and high in reliability.
Description
This application claims priority from the chinese patent application filed on day 27, 4, 2022, filed with the chinese patent office under application number 202221013162.5, entitled "a power switching output circuit, power switching circuit board, and camera device", the entire contents of which are incorporated herein by reference.
Technical Field
The present utility model relates to the field of electronic circuits, and in particular, to a power switching output circuit, a power switching circuit board, and an image pickup apparatus.
Background
With the continuous development of electronic technology, electronic products contacted by people in daily life are more and more varied. At present, a plurality of power consumption modules may exist in some electronic products, and the plurality of power consumption modules need to participate in simultaneously to realize certain functions, and for some functions, power-on is required according to a certain time sequence to realize the functions, once the power-on time sequence is wrong, the functions of the products cannot be realized.
In the prior art, the power-on sequence of each module for informing the user of realizing certain functions is usually informed, however, the mode increases the learning cost of the user, and the problem that the functions cannot be realized due to operation errors is easy to occur, so that the experience of the user is poor. The other way is to add devices such as a distribution box and a logic controller in the electronic product and control the power-on sequence among the modules through the logic controller, however, the method greatly increases the hardware cost of the product and enlarges the occupied volume of the electronic product, thereby causing inconvenience to users in use.
Disclosure of Invention
In view of the above, the present utility model provides a power switching output circuit, a power switching circuit board and an image pickup device, and is mainly aimed at solving the technical problem that the functions of a product cannot be realized when the product has a plurality of power utilization modules and the power-up time sequence of the power utilization modules is wrong.
In order to achieve the above object, the present utility model provides a power supply switching output circuit including a first power supply circuit and at least one second power supply circuit, wherein,
the first power supply circuit comprises a first power supply module and a first power supply module, and the second power supply circuit comprises a second power supply module, a first unidirectional diode, a second unidirectional diode and a second power utilization module;
the first power module is connected in series with the first power module, the first power module is connected in series with the input end of the first unidirectional diode, the second power module is connected in series with the input end of the second unidirectional diode, and the output end of the first unidirectional diode and the output end of the second unidirectional diode are connected in parallel and then connected in series with the second power module;
the output voltage of the first power supply module does not exceed the voltage application range of the first power supply module and the second power supply module, and the sum of peak power consumption of the first power supply module and the second power supply module from startup to standby does not exceed the maximum output power consumption of the first power supply module.
In one embodiment, when the second power supply circuit is plural, the number of the second power supply modules, the first unidirectional diode, the second unidirectional diode, and the second power consumption module in the power supply switching output circuit is plural, and the number of the second power supply modules, the first unidirectional diode, the second unidirectional diode, and the second power consumption module is the same.
In one embodiment, when the second power supply circuits are plural, the connection relationship between the first power supply circuit and the second power supply circuit is: the first power supply module is connected in series with the first power supply module, the first power supply module is connected in series with the input end of each first unidirectional diode respectively, each second power supply module is connected in series with the input end of each second unidirectional diode respectively, and the output end of each first unidirectional diode and the output end of each second unidirectional diode are connected in parallel and then connected in series with each second power utilization module respectively; the output voltage of the first power supply module does not exceed the voltage application range of the first power supply module and each second power supply module, and the sum of peak power consumption of the first power supply module and each second power supply module from startup to standby does not exceed the maximum output power consumption of the first power supply module.
In one embodiment, the output voltage of the first power supply module and the output voltage of the second power supply module are not greater than the reverse breakdown voltages of the first unidirectional diode and the second unidirectional diode.
In one embodiment, when the second power module is powered up, the output potential of the second unidirectional diode is greater than the output potential of the first unidirectional diode connected in parallel with the output of the second unidirectional diode.
In addition, in order to achieve the above object, the present utility model further provides a power switching circuit board, on which the power switching output circuit according to any one of the above embodiments is disposed.
In addition, in order to achieve the above object, the present utility model also provides an image pickup apparatus, which includes the power switching circuit board according to the above embodiment, and the power switching output circuit according to any one of the above embodiments is provided on the power switching circuit board.
In one embodiment, the number of the second power supply circuits of the power supply switching output circuit is one, where the first power supply module of the power supply switching output circuit is a 4.5V power supply module, the first power supply module is a main control module, the second power supply module is a 5V power supply module, and the second power consumption module is a signal transmitter device.
In one embodiment, the 4.5V power module includes an adapter socket and a power chip, the master control module includes a master control chip, the 5V power module includes a USB socket, the signal transmitter device includes a signal transmitter chip, wherein an output end of the adapter socket is connected with an input end and an enable end of the power chip, an output end of the power chip is connected with a power end of the master control chip, and an output end of the power chip is also connected with an input end of a first unidirectional diode; the power output end of the USB socket is connected with the input end of the second unidirectional diode, and the output end of the first unidirectional diode is connected with the output end of the second unidirectional diode and then connected with the power end of the signal transmitter chip.
In one embodiment, the main control chip is connected with the signal transmitter chip through a first communication signal line, and the signal transmitter chip is connected with the USB socket through a second communication signal line.
The power supply switching output circuit provided by the utility model can ensure the stable realization of the functions of the equipment under the condition that a plurality of modules are started in wrong time sequence, thereby reducing the learning cost of users. When the second power module is electrified firstly and then the first power module is electrified, the power switching output circuit can enable the second power module to be electrified before the first power module, so that the requirement of the equipment on the electrification time sequence is met; when the first power module is electrified firstly and the second power module is electrified later, the first power module can supply power for the first power module and the second power module simultaneously, so that the two power modules can finish the electrification initialization operation simultaneously and enter a standby state, and when the second power module is electrified, the second power module can be automatically switched to be powered by the second power module, so that the first power module and the second power module can meet the power supply requirement of the running state, and the power supply time sequence requirement of equipment is met. The circuit can meet the power-on sequence requirement of equipment when the product is provided with a plurality of power-on modules and the power-on sequence of the power-on modules is wrong, and the power supply switching output circuit is low in cost, small in occupied space and high in reliability.
The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present utility model more readily apparent.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:
fig. 1 shows a schematic circuit structure of a power switching output circuit according to an embodiment of the present utility model;
fig. 2 is a schematic circuit diagram of a power switching output circuit according to an embodiment of the present utility model;
fig. 3 shows a schematic circuit connection diagram of a power switching output circuit according to an embodiment of the present utility model.
Detailed Description
The utility model will be described in detail hereinafter with reference to the drawings in conjunction with embodiments. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
In order to further describe the technical means and effects adopted for achieving the preset aim of the utility model, the following detailed description refers to the specific implementation, structure, characteristics and effects according to the application of the utility model with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.
As described in the background, in some electronic products, there may be multiple power usage modules. Generally, the power consumption of each power consumption module is different, so an independent power supply circuit matched with each power consumption circuit needs to be arranged to meet the power supply requirement of each power consumption module. However, for the power consumption module, the power consumption in standby is lower than the power consumption in operation, and by utilizing the characteristic of power consumption difference, the utility model provides a power supply switching output circuit which can solve the problem that when a product has a plurality of power consumption modules and the power-on time sequence of the plurality of power consumption modules is wrong, the function of the product cannot be realized. Power switching output circuits according to some embodiments of the present utility model are described below in conjunction with fig. 1-3.
As shown in fig. 1, one embodiment of the present utility model proposes a power switching output circuit, which includes a first power supply circuit and at least one second power supply circuit, wherein the first power supply circuit includes a first power supply module and a first power module, and the second power supply circuit includes a second power supply module, a first unidirectional diode VD1, a second unidirectional diode VD2, and a second power module. Specifically, the connection mode of the first power supply circuit and the second power supply circuit is as follows: the first power module is connected in series with the first power module, the first power module is connected in series with the input end of the first unidirectional diode VD1, the second power module is connected in series with the input end of the second unidirectional diode VD2, and the output end of the first unidirectional diode VD1 and the output end of the second unidirectional diode VD2 are connected in parallel and then connected in series with the second power module. The input end of the first unidirectional diode is the anode of the first unidirectional diode, the output end of the first unidirectional diode is the cathode of the first unidirectional diode, the input end of the second unidirectional diode is the anode of the second unidirectional diode, and the output end of the second unidirectional diode is the cathode of the second unidirectional diode. It is to be understood that the connection relationship between the first power supply circuit and the second power supply circuit may be applied to a case where the second power supply circuit is one or a case where the second power supply circuit is plural, that is, when the number of the second power supply circuits is one, the connection manner between the first power supply circuit and the second power supply circuit is as described above, and when the number of the second power supply circuits is plural, the connection manner between the first power supply circuit and each of the second power supply circuits is also as described above.
In the present embodiment, the first power supply module and the second power supply module are designed with the following requirements: the output voltage of the first power supply module does not exceed the voltage application range of the first power supply module and the second power supply module, and the sum of peak power consumption from startup to standby of the first power supply module and the second power supply module does not exceed the maximum output power consumption of the first power supply module.
Further, when the power switching output circuit in this embodiment is applied to a specific scenario, the power module with the previous power-on time sequence requirement may be disposed at the position of the second power module, so that the power-on time sequence of the second power module is no later than that of the first power module no matter the user powers on the first power module or powers on the second power module. Specifically, the working principle of the power supply switching output circuit provided in this embodiment is as follows: when the first power module is electrified, the first power module can directly supply power to the first power module and the second power module, so that the first power module and the second power module can enter a standby state from a starting state, thereby meeting the electrifying time sequence requirement of equipment, and at the moment, the current of the first power module cannot flow through the second unidirectional diode VD2 due to the placement position of the second unidirectional diode VD2, thereby playing a role in protecting the second power module; when the second power module is electrified, the current direction of the second power module only can be led to the second power module after passing through the second unidirectional diode VD2 and cannot flow through the first unidirectional diode VD1 due to the placement position of the first unidirectional diode VD1, so that the first power module and the first power module are protected.
For example, the power switching output circuit may be implemented by a circuit connection manner as shown in fig. 3, where the first power module includes an adapter socket J1 and a power chip U1, the first power module includes a main control chip U2, the second power module includes a USB socket J2, and the second power module includes a signal transmitter chip U3, where an output end of the adapter socket J1 is connected to an input end VIN and an enable end EN of the power chip U1, an output end v_out of the power chip U1 is connected to a power end VIN of the main control chip U2, an output end v_out of the power chip U1 is also connected to an input end (anode) of the first unidirectional diode VD1, a power output end 5VSB of the USB socket J2 is connected to an input end (anode) of the second unidirectional diode VD2, and an output end (cathode) of the first unidirectional diode VD1 and an output end (cathode) of the second unidirectional diode VD2 are connected to a power end VIN of the signal transmitter chip U3.
Specifically, when the adapter socket J1 is connected with a power supply, the power supply chip U1 can convert the 12V voltage output by the adapter socket J1 into 4.5V voltage to supply power to the main control chip U2 and the signal transmitter chip U3, so that the main control chip U2 and the signal transmitter chip U3 can enter a standby state from a starting state, thereby meeting the power-on time sequence requirement of the device, and at the moment, the current output by the power supply chip U1 cannot flow through the second unidirectional diode VD2 due to the placement position of the second unidirectional diode VD2, thereby playing the role of protecting the USB power supply; when the USB socket J2 is connected with a power supply, the voltage of the output end of the second unidirectional diode VD2 is larger than that of the output end of the first unidirectional diode VD1, the current flows from high potential to low potential, at the moment, the current output by the power chip U1 does not flow through the first unidirectional diode VD1 any more, the power supply connected with the USB socket J2 only supplies power for the signal transmitter chip U3, the power supply connected with the adapter socket J1 only supplies power for the main control chip U2, and meanwhile, the current output by the USB socket J2 only flows to the signal transmitter chip U3 after passing through the second unidirectional diode VD2, and cannot flow through the first unidirectional diode VD1, so that the functions of protecting the power chip U1 and the main control chip U2 are achieved. In the above circuit, no matter the adapter socket J1 is connected with the power supply first or the USB socket J2 is connected with the power supply first, the main control chip U2 and the signal transmitter chip U3 can be smoothly started, and the originally set function of the circuit is realized.
It should be noted that, the voltage application ranges of the main control chip U2 and the signal transmitter chip U3 may be obtained in the ways of a chip manual and a product specification of the main control chip U2 and the signal transmitter chip U3, the sum of peak power consumption from start-up to standby of the main control chip U2 and the signal transmitter chip U3 may be measured by means of a common electronic detection instrument and calculated by a power calculation formula, and by obtaining the voltage application ranges of the main control chip U2 and the signal transmitter chip U3 and the sum of peak power consumption from start-up to standby, it may be determined whether the two power supply modules may meet the design requirement of the circuit, so that the circuit may be implemented.
The power supply switching output circuit provided by the embodiment can ensure that the equipment can realize the stable function of the equipment under the condition of a plurality of module starting time sequence errors, thereby reducing the learning cost of users. When the second power module is electrified firstly and then the first power module is electrified, the power switching output circuit can enable the second power module to be electrified before the first power module, so that the requirement of the equipment on the electrification time sequence is met; when the first power module is electrified firstly and the second power module is electrified later, the first power module can supply power for the first power module and the second power module simultaneously, so that the two power modules can finish the electrification initialization operation simultaneously and enter a standby state, and when the second power module is electrified, the second power module can be automatically switched to be powered by the second power module, so that the first power module and the second power module can meet the power supply requirement of the running state, and the power supply time sequence requirement of equipment is met. The circuit can meet the power-on sequence requirement of equipment when the product is provided with a plurality of power-on modules and the power-on sequence of the power-on modules is wrong, and the power supply switching output circuit is low in cost, small in occupied space and high in reliability.
In one embodiment of the present utility model, the number of the second power supply circuits in the power switching output circuit may be one or more, and when the number of the second power supply circuits is plural, the number of the second power supply modules, the first unidirectional diodes, the second unidirectional diodes, and the second power consumption modules of the power switching output circuit is plural, and the number of the second power supply modules, the first unidirectional diodes, the second unidirectional diodes, and the second power consumption modules are the same. In this embodiment, the second power supply circuit is used in a set, and each time a second power module is newly added in the circuit, a power module corresponding to the second power module and two unidirectional diodes are required to be newly added, and the first power supply circuit and the second power supply circuit are connected according to the connection mode described in the above embodiment, so that no matter which power module is powered on by a user, the power-on time sequence of the second power module is not later than that of the first power module, and therefore, when a product has a plurality of power modules, and when the power-on time sequences of the plurality of power modules are wrong, the power-on sequence requirement of equipment is met.
In one embodiment, as shown in fig. 2, when the second power supply circuits are plural, the connection relationship between the first power supply circuit and the second power supply circuit is: the first power module is connected in series with the first power module, the first power module is connected in series with the input of first unidirectional diode VD3 and VD5 respectively, each second power module is connected in series with the input of second unidirectional diode VD4 and VD6 respectively, the output of first unidirectional diode VD3 and VD5 respectively with the output parallel connection of second unidirectional diode VD4 and VD6 respectively after being connected in series with each second power module respectively. In the present embodiment, the first power supply module and the second power supply module are designed with the following requirements: the output voltage of the first power supply module does not exceed the voltage application range of the first power supply module and each second power supply module, and the sum of peak power consumption of the first power supply module and each second power supply module from startup to standby does not exceed the maximum output power consumption of the first power supply module. It should be noted that, in order to make the first power module and the second power module smoothly enter the standby state from the start state, the number of the second power supply circuits should not be too large, and preferably one or two.
In one embodiment, the design of the first power supply module and the second power supply module also requires the following: the output voltage of the first power supply module and the output voltage of the second power supply module are not greater than the reverse breakdown voltage of each first unidirectional diode and each second unidirectional diode, and the requirement is that the first unidirectional diode and the second unidirectional diode can play a role in reverse cut-off, so that the flow direction of current is controlled, and the effect of protecting each power supply module and each power utilization module is achieved.
In one embodiment, the design of the first power supply module and the second power supply module also requires the following: when the second power module is powered on, the output end potential of the second unidirectional diode is greater than the output end potential of the first unidirectional diode connected in parallel with the output end of the second unidirectional diode (namely, the output voltage of the second power module-the forward voltage drop of the second unidirectional diode VD2 > the output voltage of the first power module-the forward voltage drop of the first unidirectional diode VD 1), which is required to prevent the problem that the current of the first power module still flows to the second power module to cause the leakage of the first power module when the second power module is powered on, so that when the second power module is powered on, the circuit can be automatically switched to only the second power module to supply power for the second power module. When the second power module is electrified, the output end voltage of the second unidirectional diode is larger than that of the first unidirectional diode, and the current flows from the high potential to the low potential, so that the current of the first power module does not flow through the first unidirectional diode any more, the second power module only supplies power for the second power module, and the first power module only supplies power for the first power module.
In yet another aspect, an embodiment of the present utility model provides a power switching circuit board, on which the power switching output circuit according to any one of the above embodiments is disposed. It can be understood that the power switching circuit board may be one or more, and the number and types of the circuit modules disposed on each circuit board may be configured according to practical situations, which is not limited in this embodiment.
In another aspect, an embodiment of the present utility model provides an image pickup apparatus including the power switching circuit board according to the above embodiment, on which the power switching output circuit according to any one of the above embodiments is provided. In this embodiment, the image capturing apparatus is provided with multiple power supply terminals (i.e., multiple power supply modules are provided), where each power supply terminal is connected to a different power consumption module, one power supply terminal is connected to a master control device, and other power supply terminals are connected to slave devices. For partial functions of the camera device, only the slave device can be realized after the master device is electrified, in order to realize the partial functions, the slave device is placed at the position of the second power utilization module, so that the partial functions of the device can still be realized under the condition that the power supply terminal corresponding to the slave device is electrified after the power supply terminal corresponding to the master device, the time cost of a user for learning how to use the camera device is reduced, the problem that the device function cannot be realized due to misoperation of the user is also reduced, the cost of the device is not increased, the volume of the device is enlarged, and the reliability is higher.
In one embodiment, the number of the second power supply circuits of the power supply switching output circuit arranged on the power supply switching circuit board of the image pickup device is one, wherein a first power supply module in the power supply switching output circuit is a 4.5V power supply module, the first power supply module is a main control module, a second power supply module is a 5V power supply module, and the second power supply module is a signal transmitter device. In this embodiment, the 4.5V power module is connected in series with the main control module, the 4.5V power module is also connected in series with the input end of the first unidirectional diode, the 5V power module is connected in series with the input end of the second unidirectional diode, and the output end of the first unidirectional diode and the output end of the second unidirectional diode are connected in parallel and then connected in series with the signal transmitter device.
In the above embodiment, when the 4.5V power module is powered on, the 4.5V power module may directly supply power to the main control module and the signal transmitter device, so that the main control module and the signal transmitter device may enter a standby state from a start state, thereby meeting a power-on time sequence requirement of the device, and at this time, due to a placement position of the second unidirectional diode, a current of the 4.5V power module may not flow through the second unidirectional diode, thereby playing a role of protecting the 5V power module; when the 5V power supply module is electrified, because the voltage of the output end of the second unidirectional diode is larger than that of the first unidirectional diode, the current flows from the high potential to the low potential, at the moment, the current of the 4.5V power supply module does not flow through the first unidirectional diode any more, the 5V power supply module only supplies power for the signal transmitter device, and the 4.5V power supply module only supplies power for the main control module, meanwhile, because of the placement position of the first unidirectional diode, the current direction of the 5V power supply module only leads to the signal transmitter device after passing through the second unidirectional diode and cannot flow through the first unidirectional diode, thereby playing the role of protecting the 4.5V power supply module and the main control module.
In the above embodiment, the signal transmitter device is a switching device that is mapped through the network cable interface, and when the signal transmitter device is powered on later than the main control module, the computer cannot identify the image capturing device, so that the image capturing device cannot map through the network cable interface. Before the power supply switching output circuit provided by the embodiment is adopted, once the power-on time sequence of a user is wrong, the image pickup device cannot be mapped through the network cable interface, and after the power supply switching output circuit provided by the embodiment is adopted, no power-on time sequence is adopted by the user, the user cannot cause the mapping failure, so that the stability of equipment is effectively improved.
In one embodiment, as shown in fig. 3, the 4.5V power module includes an adapter socket J1 and a power chip U1, the master control module includes a master control chip U2, the 5V power module includes a USB socket J2, and the signal transmitter device includes a signal transmitter chip U3, where an output end of the adapter socket J1 is connected to an input end VIN and an enable end EN of the power chip U1, an output end v_out of the power chip U1 is connected to a power end VIN of the master control chip U2, an output end v_out of the power chip U1 is further connected to an input end (anode) of the first unidirectional diode VD1, a power output end 5 of the USB socket J2 is connected to an input end (anode) of the second unidirectional diode VD2, and an output end (cathode) of the first unidirectional diode VD1 and an output end (cathode) of the second unidirectional diode VD2 are connected to a power end VIN of the signal transmitter chip U3.
Specifically, when the adapter socket J1 is connected with a power supply, the power supply chip U1 can convert the 12V voltage output by the adapter socket J1 into 4.5V voltage to supply power to the main control chip U2 and the signal transmitter chip U3, so that the main control chip U2 and the signal transmitter chip U3 can enter a standby state from a starting state, thereby meeting the power-on time sequence requirement of the device, and at the moment, the current output by the power supply chip U1 cannot flow through the second unidirectional diode VD2 due to the placement position of the second unidirectional diode VD2, thereby playing the role of protecting the USB power supply; when the USB socket J2 is connected with a power supply, the voltage of the output end of the second unidirectional diode VD2 is larger than that of the output end of the first unidirectional diode VD1, the current flows from high potential to low potential, at the moment, the current output by the power chip U1 does not flow through the first unidirectional diode VD1 any more, the power supply connected with the USB socket J2 only supplies power for the signal transmitter chip U3, the power supply connected with the adapter socket J1 only supplies power for the main control chip U2, and meanwhile, the current output by the USB socket J2 only flows to the signal transmitter chip U3 after passing through the second unidirectional diode VD2, and cannot flow through the first unidirectional diode VD1, so that the functions of protecting the power chip U1 and the main control chip U2 are achieved. In the above circuit, no matter the adapter socket J1 is connected with the power supply first or the USB socket J2 is connected with the power supply first, the main control chip U2 and the signal transmitter chip U3 can be smoothly started, and the originally set function of the circuit is realized.
In one embodiment, the main control chip U2 may be further connected to the signal transmitter chip U3 through a first communication signal line, so as to implement communication between the main control chip U2 and the signal transmitter chip U3, where a signal input end of the main control chip U2 is connected to a signal output end of the signal transmitter chip U3, and a signal output end of the main control chip U2 is connected to a signal input end of the signal transmitter chip U3. In addition, the signal transmitter chip U3 may be further connected to the USB socket J2 through a second communication signal line, so as to implement communication between the signal transmitter chip U3 and a third party device, where a signal input end of the signal transmitter chip U3 is connected to a signal output end of the USB socket J2, a signal output end of the signal transmitter chip U3 is connected to a signal input end of the USB socket J2, and a ground end of the signal transmitter chip U3 is connected to a ground end of the USB socket J2. It may be understood that other circuits may be further disposed on the power switching circuit board of the image capturing apparatus, and the power switching output circuit disposed on the power switching circuit board may also include other circuit modules or be implemented by other circuit connection manners, which is not specifically limited in this embodiment.
It should be noted that, the voltage application ranges of the main control chip U2 and the signal transmitter chip U3 may be obtained in the ways of a chip manual and a product specification of the main control chip U2 and the signal transmitter chip U3, the sum of peak power consumption from start-up to standby of the main control chip U2 and the signal transmitter chip U3 may be measured by means of a common electronic detection instrument and calculated by a power calculation formula, and by obtaining the voltage application ranges of the main control chip U2 and the signal transmitter chip U3 and the sum of peak power consumption from start-up to standby, it may be determined whether the two power supply modules may meet the design requirement of the circuit, so that the circuit may be implemented.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. A power switching output circuit is characterized in that the power switching output circuit comprises a first power supply circuit and at least one second power supply circuit, wherein,
the first power supply circuit comprises a first power supply module and a first power supply module, and the second power supply circuit comprises a second power supply module, a first unidirectional diode, a second unidirectional diode and a second power utilization module;
the first power module is connected in series with the first power module, the first power module is connected in series with the input end of the first unidirectional diode, the second power module is connected in series with the input end of the second unidirectional diode, and the output end of the first unidirectional diode and the output end of the second unidirectional diode are connected in parallel and then connected in series with the second power module;
the output voltage of the first power supply module does not exceed the voltage application range of the first power supply module and the second power supply module, and the sum of peak power consumption from startup to standby of the first power supply module and the second power supply module does not exceed the maximum output power consumption of the first power supply module.
2. The power supply switching output circuit according to claim 1, wherein when the second power supply circuit is plural, the number of the second power supply modules, the first unidirectional diode, the second unidirectional diode, and the second power consumption module in the power supply switching output circuit is plural, and the number of the second power supply modules, the first unidirectional diode, the second unidirectional diode, and the second power consumption module is the same.
3. The power supply switching output circuit according to claim 2, wherein when the second power supply circuit is plural, the connection relationship of the first power supply circuit and the second power supply circuit is:
the first power supply module is connected in series with the first power supply module, the first power supply module is connected in series with the input end of each first unidirectional diode respectively, each second power supply module is connected in series with the input end of each second unidirectional diode respectively, and the output end of each first unidirectional diode and the output end of each second unidirectional diode are connected in parallel and then connected in series with each second power utilization module respectively;
the output voltage of the first power supply module does not exceed the voltage application range of the first power supply module and each second power supply module, and the sum of peak power consumption of the first power supply module and each second power supply module from startup to standby does not exceed the maximum output power consumption of the first power supply module.
4. A power switching output circuit according to any one of claims 1 to 3 wherein the output voltage of the first power supply module and the output voltage of the second power supply module are not greater than the reverse breakdown voltages of the first unidirectional diode and the second unidirectional diode.
5. A power switching output circuit according to any one of claims 1 to 3 wherein the output potential of the second unidirectional diode is greater than the output potential of the first unidirectional diode connected in parallel with the output of the second unidirectional diode when the second power module is powered up.
6. A power switching circuit board, wherein the power switching circuit board is provided with the power switching output circuit according to any one of claims 1 to 5.
7. An image pickup apparatus, characterized in that the image pickup apparatus comprises the power supply switching circuit board according to claim 6.
8. The image capturing apparatus according to claim 7, wherein the number of the second power supply circuits of the power supply switching output circuit provided on the power supply switching circuit board is one, wherein the first power supply module of the power supply switching output circuit is a 4.5V power supply module, the first power supply module is a main control module, the second power supply module is a 5V power supply module, and the second power consumption module is a signal transmitter device.
9. The image capturing apparatus according to claim 8, wherein the 4.5V power module includes an adapter socket and a power chip, the main control module includes a main control chip, the 5V power module includes a USB socket, the signal transmitter device includes a signal transmitter chip, wherein,
the output end of the adapter socket is connected with the input end and the enabling end of the power chip, the output end of the power chip is connected with the power end of the main control chip, and the output end of the power chip is also connected with the input end of the first unidirectional diode;
the power output end of the USB socket is connected with the input end of the second unidirectional diode, and the output end of the first unidirectional diode is connected with the output end of the second unidirectional diode and then connected with the power end of the signal transmitter chip.
10. The image capturing apparatus according to claim 9, wherein the main control chip is connected to the signal transmitter chip through a first communication signal line, and the signal transmitter chip is connected to the USB socket through a second communication signal line.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221013162 | 2022-04-27 | ||
| CN2022210131625 | 2022-04-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219394479U true CN219394479U (en) | 2023-07-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320042832.4U Active CN219394479U (en) | 2022-04-27 | 2023-01-05 | Power supply switching output circuit, power supply switching circuit board and image pickup device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219394479U (en) |
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2023
- 2023-01-05 CN CN202320042832.4U patent/CN219394479U/en active Active
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