CN213240932U - Power supply sharing circuit, camera module and electronic equipment - Google Patents
Power supply sharing circuit, camera module and electronic equipment Download PDFInfo
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- CN213240932U CN213240932U CN202022730763.5U CN202022730763U CN213240932U CN 213240932 U CN213240932 U CN 213240932U CN 202022730763 U CN202022730763 U CN 202022730763U CN 213240932 U CN213240932 U CN 213240932U
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Abstract
The application relates to the technical field of camera power supplies, and discloses a power supply sharing circuit, a camera module and electronic equipment, wherein the power supply sharing circuit comprises: the output module is connected with at least two output branches of the camera module; the input module comprises at least one input branch, each input branch is provided with a low dropout linear regulator, and the current capacity of the low dropout linear regulator is more than or equal to the sum of the current consumptions of the connected output branches; and the control module is used for controlling the connection or disconnection of each output branch. The low dropout linear regulator is selected according to the maximum current consumption capacity of the connected camera module, and a plurality of camera modules can share one low dropout linear regulator, so that the cost is reduced, and the board distribution area is saved.
Description
Technical Field
The utility model relates to a camera power technical field, concretely relates to power sharing circuit, camera module and electronic equipment.
Background
With the development of mobile terminals, camera modules of mobile terminals are increasing, and in a project module of a manufacturer, one camera module needs at least three power supplies, specifically including an analog circuit power supply (AVDD), a digital circuit power supply (DVDD), a driving power supply and a data interface power supply (IOVDD). In a common design, the power supply of each camera module except the data interface power supply (IOVDD) is independently powered, so that the N camera modules need 3N +1 low dropout linear regulators (LDOs), and take a common 4-camera as an example, and need 13 LDOs. Too many LDOs are used, so that the problems of large plate distribution area and high cost exist. Therefore, an Integrated Circuit (IC) is used for integrating a plurality of LDOs, and the integrated LDOs are relatively separated, so that a certain layout area is saved, but an integrated LDO has limited performance, and an AVDD power supply with high requirement on voltage ripple usually needs to be additionally used for supplying power in the design of a mobile phone.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a power sharing circuit, a camera module and an electronic device.
In a first aspect, the present invention provides a power supply sharing circuit, including: the output module is connected with at least two output branches of the load; the input module comprises at least one input branch, each input branch is provided with a low dropout linear regulator, and the current capacity of the low dropout linear regulator is more than or equal to the sum of the current consumptions of the connected output branches; and the control module is used for controlling the connection or disconnection of each output branch.
In one embodiment, the at least one input branch comprises two input branches, wherein a first low dropout linear regulator is arranged on one input branch, and a second low dropout linear regulator is arranged on the other input branch.
In one embodiment, each input branch is provided with a power supply, and the power supply is connected with the low dropout linear regulator; the power supply comprises an analog circuit power supply and a digital circuit power supply, the analog circuit power supply is connected with the first low dropout linear regulator, and the digital circuit power supply is connected with the second low dropout linear regulator.
In one embodiment, the input branches of the first low dropout regulator and the input branches of the second low dropout regulator correspond to the same number of output branches, respectively.
In one embodiment, each output branch is provided with a switch, and the control module is used for controlling the on or off of each switch.
In one embodiment, the control module is used for controlling the number and sequence of the opening or closing of the switches.
In a second aspect, the present invention provides a camera module, including: the power supply sharing circuit described in the first aspect; and each of the at least two output branches is respectively connected with different lens modules.
In a third aspect, the present invention provides an electronic device comprising the camera module described in the second aspect.
In one embodiment, the number of the camera modules is two, wherein one camera module is a front camera module, and the other camera module is a rear camera module.
In one embodiment, the electronic device comprises a cell phone or a tablet computer.
Compared with the prior art, the beneficial effects of the utility model are that:
this scheme provides a power sharing circuit, camera module and electronic equipment, this power sharing circuit includes: the output module is connected with at least two output branches of the camera module; the input module comprises at least one input branch, each input branch is provided with a low dropout linear regulator, and the current capacity of the low dropout linear regulator is more than or equal to the sum of the current consumptions of the connected output branches; and the control module is used for controlling the connection or disconnection of each output branch. The low dropout linear regulator is selected according to the maximum current consumption capacity of the connected camera module, and a plurality of camera modules can share one low dropout linear regulator, so that the cost is reduced, and the board distribution area is saved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 shows a schematic structural diagram of a power supply sharing circuit according to an embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 shows a schematic structure diagram of a power supply sharing circuit provided in the present application.
The power supply sharing circuit includes: the output module is connected with at least two output branches of the load; the input module comprises at least one input branch, each input branch is provided with a low dropout linear regulator, and the current capacity of the low dropout linear regulator is more than or equal to the sum of the current consumptions of the connected output branches; and the control module is used for controlling the connection or disconnection of each output branch.
Illustratively, an LDO may have two modes of operation: a low power mode and a normal operating mode. In the normal operating mode, all electronic devices of the LDO operate, and in the low-power operating mode, part of the electronic devices of the LDO operate. In a normal operation mode, when the output current of the LDO is usually 50 milliampere-200 milliampere, the output voltage of the LDO is rated output voltage, in a low power consumption mode, the output current of the LDO is usually microampere level, and the output voltage of the LDO is the rated output voltage. That is, the current supply capability of the LDO in the normal operation mode is stronger than that of the LDO in the low power consumption mode.
In some embodiments, the LDO includes a first electronic device that operates in a normal operating mode and a low power mode, and a second electronic device that operates in the normal operating mode and does not operate in the low power mode. In case of a momentary increase of the load current, the LDO needs to switch from the low power consumption mode to the normal operation mode, i.e. needs to start the second electronic device which does not operate in the low power consumption mode. In practical applications, a critical current exists, when the load current is less than the critical current, the LDO is in a low power consumption mode, and when the load current is greater than the critical current, the LDO is in a normal operation mode. That is, in the case where the load current increases from less than the critical current to more than the critical current, the second electronic device needs to be activated. The critical current may be a point value or a range value.
In order to reduce the power consumption of the electronic device, in most cases, the LDO is in a low power consumption mode, and is switched to a normal operation mode when necessary. For example, when the voltage stabilizing circuit is connected with the camera module, when the camera module is not used, the LDO is in a low power consumption mode, and when the camera module needs to be used, the LDO is switched to a normal operating mode to supply power to the camera module. The output current of the LDO needs to be changed rapidly from the output current value in the low power consumption mode (equal to 0 or microampere level) to the output current value in the normal operation mode in a short time, where the output current value may be equal to the current required by the module connected to the voltage regulator circuit. Because the low dropout regulator needs to meet the current requirement of the load on the output branch to work together, the current capacity of the low dropout regulator is larger than or equal to the sum of the currents of the switched-on loads.
The control module can control the output branches to be communicated simultaneously or only control one output branch to be communicated. The low dropout linear regulator is selected according to the maximum current consumption capacity of the connected load, and a plurality of loads can share one low dropout linear regulator, so that the cost is reduced, and the board distribution area is saved. It should be noted that the sum of the current consumptions of the multiple loads needs to be calculated in advance, and the LDO is selected accordingly. Here, the load includes, but is not limited to, a camera module, a fingerprint module, a display screen, a sensor, and the like.
In this embodiment, the at least one input branch includes two input branches, one of the input branches is provided with a first low dropout regulator, and the other input branch is provided with a second low dropout regulator.
In this embodiment, each of the input branches is provided with a power supply, and the power supply is connected with the low dropout linear regulator. The power supply comprises an analog circuit power supply and a digital circuit power supply, the analog circuit power supply is connected with the first low dropout linear regulator, and the digital circuit power supply is connected with the second low dropout linear regulator.
In this embodiment, the input branches of the first low dropout regulator and the input branches of the second low dropout regulator correspond to the same number of output branches, respectively.
Specifically, the at least two output branches may include 6 output branches, the input branch provided with the first low dropout regulator corresponds to the 6 output branches, and the input branch provided with the second low dropout regulator corresponds to the 6 output branches.
In this embodiment, each output branch is provided with a switch, and the control module is configured to control the on or off of each switch. Further, the control module is used for controlling the number and the sequence of the on or off of the switches.
In this implementation, the control module may include a Controller (CPU) and a switch switching unit.
Furthermore, the utility model provides a camera module, include: the power supply common circuit described above; and each of the at least two output branches is respectively connected with different lens modules.
The low dropout linear regulator is selected according to the maximum current consumption capacity of the connected camera module, and a plurality of camera modules can share one low dropout linear regulator, so that the cost is reduced, and the board distribution area is saved.
The low dropout linear regulator matched with the selected power supply with the maximum current consumption when all the camera modules work is pressed. According to the working state of the camera modules, the output branches are respectively controlled to be opened and closed, and if a plurality of camera modules need to work simultaneously, switches on the output branches can be opened simultaneously. It should be noted that the sum of the current consumptions of the plurality of camera modules needs to be calculated in advance, and the LDO is selected accordingly.
Taking the power supply comprising an analog circuit power supply and a digital circuit power supply as an example, the first low dropout regulator and the second low dropout regulator are selected according to the maximum current consumption when the camera module is communicated to work. When six camera modules are connected, the output branch circuit D1 and the output branch circuit A1 are connected with a first camera module, the output branch circuit D2 and the output branch circuit A2 are connected with a second camera module, the output branch circuit D3 and the output branch circuit A3 are connected with a third camera module, the output branch circuit D4 and the output branch circuit A4 are connected with a fourth camera module, the output branch circuit D5 and the output branch circuit A5 are connected with a fifth camera module, and the output branch circuit D6 and the output branch circuit A6 are connected with a sixth camera module. The current capacity of the first low dropout regulator is selected according to the sum of the power consumptions of the six camera modules calculated in advance, and the current capacity of the second low dropout regulator is also selected according to the sum of the power consumptions of the six camera modules calculated in advance.
Finally, the utility model provides an electronic equipment, including the above-mentioned camera module.
In this embodiment, the number of the camera modules is two, one of the camera modules is a front camera module, and the other camera module is a rear camera module.
In this embodiment, the electronic device includes, but is not limited to, a mobile phone or a tablet computer, and may also be a notebook computer, a wearable device, and the like.
The application of the power supply sharing circuit is described by taking a mobile phone with four cameras as an example.
The mobile phone needs to be connected with four camera modules, each camera module needs an analog circuit power supply (AVDD) and a digital circuit power supply (DVDD), and the analog circuit power supply (AVDD) and the digital circuit power supply (DVDD) need to be connected with four output branches. The current capacity of the low dropout regulator connected to the analog circuit power supply (AVDD) is selected according to the sum of the power consumptions of the four camera modules calculated in advance, and the current capacity of the low dropout regulator connected to the digital circuit power supply (DVDD) is also selected according to the sum of the power consumptions of the four camera modules calculated in advance.
Specifically, the output branch D1 and the output branch a1 are connected to a first camera module, the output branch D2 and the output branch a2 are connected to a second camera module, the output branch D3 and the output branch A3 are connected to a third camera module, and the output branch D4 and the output branch a4 are connected to a fourth camera module. The current capacity of the first low dropout regulator is selected according to the sum of the current consumptions of the connected four camera modules at A1, A2, A3 and A4, and the current capacity of the second low dropout regulator is also selected according to the sum of the current consumptions of the connected four camera modules at D1, D2, D3 and D4.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the disclosure herein is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the spirit of the disclosure. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. A power sharing circuit, comprising:
the output module is connected with at least two output branches of the load;
the input module comprises at least one input branch, each input branch is provided with a low dropout linear regulator, and the current capacity of the low dropout linear regulator is more than or equal to the sum of the current consumptions of the connected output branches;
and the control module is used for controlling the connection or disconnection of each output branch.
2. The power supply sharing circuit of claim 1, wherein the at least one input branch comprises two input branches, wherein a first LDO is disposed on one of the input branches, and a second LDO is disposed on the other input branch.
3. The power supply sharing circuit of claim 1, wherein each of the input branches has a power supply, and the power supply is connected to the low dropout linear regulator; the power supply comprises an analog circuit power supply and a digital circuit power supply, the analog circuit power supply is connected with the first low dropout linear regulator, and the digital circuit power supply is connected with the second low dropout linear regulator.
4. The power supply sharing circuit according to claim 3, wherein the input branches of the first low dropout linear regulator and the input branches of the second low dropout linear regulator correspond to the same number of the output branches.
5. The power supply sharing circuit according to claim 1 or 4, wherein each of the output branches is provided with a switch, and the control module is configured to control the on or off of each of the switches.
6. The power sharing circuit of claim 5, wherein the control module is configured to control the number and sequence of the switches that are turned on or off.
7. A camera module, comprising:
the power supply sharing circuit of any one of claims 1 to 6;
and each of the at least two output branches is respectively connected with different lens modules.
8. An electronic device comprising the camera module of claim 7.
9. The electronic device of claim 8, wherein the number of the camera modules is two, one of the camera modules is a front camera module, and the other camera module is a rear camera module.
10. The electronic device of claim 8 or 9, wherein the electronic device comprises a mobile phone or a tablet computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022730763.5U CN213240932U (en) | 2020-11-23 | 2020-11-23 | Power supply sharing circuit, camera module and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022730763.5U CN213240932U (en) | 2020-11-23 | 2020-11-23 | Power supply sharing circuit, camera module and electronic equipment |
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| CN213240932U true CN213240932U (en) | 2021-05-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117724595A (en) * | 2023-05-30 | 2024-03-19 | 荣耀终端有限公司 | Power management circuit, method, apparatus, electronic device, and readable storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117724595A (en) * | 2023-05-30 | 2024-03-19 | 荣耀终端有限公司 | Power management circuit, method, apparatus, electronic device, and readable storage medium |
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