Power supply system of camera module
By setting up a voltage divider module in the power system of the USB camera module, the dependence on the LDO voltage conversion chip is reduced, the problems of large space occupation and difficulty in heat dissipation are solved, and more efficient power management is achieved.
Patent Information
- Application Number
- CN202421468974.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-06-25
AI Technical Summary
The power system of the existing USB camera module requires multiple LDO voltage conversion chips, which makes the space occupied and the heat dissipation difficult.
By setting up the first voltage divider module and the second voltage divider module, the voltage output required by the camera module sensor is realized using simple components, reducing the dependence on the LDO voltage conversion chip, saving space and improving heat dissipation.
It realizes the voltage required for the camera module sensor in a smaller space, avoids the problem of poor heat dissipation and improves the overall performance of the module.
Smart Images
Figure CN222827133U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of camera modules, in particular to a power supply system of a camera module. Background Art
[0002] At present, the interface of the USB camera module is usually a 5V input power interface, and then connected to three LDO voltage conversion chips to output the voltages required by the three camera module sensors, usually 3.3V, 1.8V and 1.2V.
[0003] In the related art, the size of the USB camera module is generally small, and the three LDO voltage conversion chips need to be matched with multiple capacitors and resistors, so they will occupy a large layout space. In addition, the space crowding caused by the three LDO voltage conversion chips will make it difficult for the module to dissipate heat. Utility Model Content
[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a power supply system for a camera module, which can realize the voltage required by the camera module sensor through simple components, thereby saving space and preventing poor heat dissipation problems.
[0005] The purpose of this utility model is achieved through the following technical solutions:
[0006] In a first aspect, the present application provides a power supply system for a camera module, comprising: an input module; an LDO voltage conversion chip, the input module is electrically connected to the LDO voltage conversion chip; a first voltage divider module is electrically connected to the LDO voltage conversion chip; a second voltage divider module is electrically connected to the LDO voltage conversion chip; an output module, comprising a first output end, a second output end and a third output end, the first output end is electrically connected to the LDO voltage conversion chip, the second output end is electrically connected to the first voltage divider module, and the third output end is electrically connected to the second voltage divider module.
[0007] The first voltage dividing module includes a resistor R1 , a first end of the resistor R1 is electrically connected to the LDO voltage conversion chip, and a second end of the resistor R1 is electrically connected to the second output end.
[0008] The first voltage dividing module further includes a resistor R2, a first end of the resistor R2 is electrically connected to the LDO voltage conversion chip, and a second end of the resistor R2 is electrically connected to the second output end.
[0009] The second voltage dividing module includes a resistor R3, a first end of the resistor R3 is electrically connected to the LDO voltage conversion chip, and a second end of the resistor R3 is electrically connected to the third output end.
[0010] The second voltage dividing module further includes a resistor R4, a first end of the resistor R4 is electrically connected to the LDO voltage conversion chip, and a second end of the resistor R4 is electrically connected to the third output end.
[0011] It also includes a voltage stabilizing module, which includes a capacitor C1. A first end of the capacitor C1 is electrically connected to the LDO voltage conversion chip, and a second end of the capacitor C1 is grounded.
[0012] The voltage stabilizing module comprises a capacitor C2, a first end of the capacitor C2 is electrically connected to the LDO voltage conversion chip, and a second end of the capacitor C2 is grounded.
[0013] The voltage stabilizing module comprises a capacitor C3, a first end of the capacitor C3 is electrically connected to the LDO voltage conversion chip, and a second end of the capacitor C3 is grounded.
[0014] The value of the capacitor C1 and the value of the capacitor C3 are both 1 μF .
[0015] The value of the capacitor C2 is 2 μF .
[0016] Compared with the prior art, the utility model has at least the following advantages:
[0017] By setting the first voltage divider module and the second voltage divider module, the first voltage divider module can make the second output end output 1.8V voltage, and the second voltage divider module can make the third output end output 1.2V voltage. By adding simple components, it is possible to provide the voltage required by the camera module sensor, thereby saving space and preventing poor heat dissipation problems. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments are briefly introduced below.
[0019] Figure 1 This is a functional module diagram of a power supply system of a camera module in one embodiment of the utility model;
[0020] Figure 2 The present invention is a circuit diagram of a power supply system of a camera module in one embodiment of the present invention. DETAILED DESCRIPTION
[0021] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.
[0022] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.
[0023] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0024] The size of USB camera modules is generally small, and the three LDO voltage conversion chips need to be matched with multiple capacitors and resistors, so they will take up a large layout space. In addition, the crowded space caused by the three LDO voltage conversion chips will make it difficult for the module to dissipate heat.
[0025] In response to the above problems, an embodiment of the present application provides a power supply system for a camera module, which can achieve the voltage required by the camera module sensor through simple components, thereby saving space and preventing poor heat dissipation problems.
[0026] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.
[0027] See also Figure 1 A power supply system for a camera module includes: an input module 100, an LDO voltage conversion chip 200, a first voltage divider module 300, a second voltage divider module 400 and an output module 500, wherein the input module 100 is electrically connected to the LDO voltage conversion chip 200; the first voltage divider module 300 is electrically connected to the LDO voltage conversion chip 200; the second voltage divider module 400 is electrically connected to the LDO voltage conversion chip 200; the output module 500 includes a first output terminal 510, a second output terminal 520 and a third output terminal 530, wherein the first output terminal 510 is electrically connected to the LDO voltage conversion chip 200, the second output terminal 520 is electrically connected to the first voltage divider module 300, and the third output terminal 530 is electrically connected to the second voltage divider module 400.
[0028] It should be noted that the input module 100 is used to input a 5V voltage to the LDO voltage conversion chip 200. After the LDO voltage conversion chip 200 converts the voltage, the first output terminal 510 will output 3.3V, and the second output terminal 520 will output 3.3V after the first voltage divider module 300. The third output terminal 530 outputs 1.2V after the second voltage divider module 400. Therefore, by setting the first voltage divider module 300 and the second voltage divider module 400, the first voltage divider module 300 can make the second output terminal 520 output a 1.8V voltage, and the second voltage divider module 400 can make the third output terminal 530 output a 1.2V voltage. By adding simple components, it is possible to provide the voltage required by the camera module sensor, thereby saving space and preventing poor heat dissipation problems.
[0029] See also Figure 2 In one embodiment, the first voltage divider module 300 includes a resistor R1, a first end of the resistor R1 is electrically connected to the LDO voltage conversion chip 200, and a second end of the resistor R1 is electrically connected to the second output terminal 520. Specifically, the first voltage divider module 300 also includes a resistor R2, a first end of the resistor R2 is electrically connected to the LDO voltage conversion chip 200, and a second end of the resistor R2 is electrically connected to the second output terminal 520.
[0030] It should be noted that the resistance value of the resistor R1 is 15 ohms, the resistance value of the resistor R2 is 18 ohms, and the second output terminal is based on formula 1:
[0031]
[0032] Where Vout is Figure 2 The value output by the Vout pin of the LDO voltage conversion chip 200 is 3.3V, and Vout1 is the voltage value output by the second output terminal 520 .
[0033] See also Figure 2 In one embodiment, the second voltage divider module 400 includes a resistor R3, a first end of the resistor R3 is electrically connected to the LDO voltage conversion chip 200, and a second end of the resistor R3 is electrically connected to the third output terminal 530. Specifically, the second voltage divider module 400 also includes a resistor R4, a first end of the resistor R4 is electrically connected to the LDO voltage conversion chip 200, and a second end of the resistor R4 is electrically connected to the third output terminal 530.
[0034] It should be noted that the resistance value of the resistor R3 is 21 ohms, the resistance value of the resistor R4 is 12 ohms, and the third output terminal 530 is based on Formula 2:
[0035]
[0036] Where Vout is Figure 2The value output by the Vout pin of the LDO voltage conversion chip 200 is 3.3V, and Vout2 is the voltage value output by the third output terminal 530 .
[0037] See also Figure 2 In one embodiment, a power supply system of a camera module further includes a voltage stabilizing module, the voltage stabilizing module includes a capacitor C1, a first end of the capacitor C1 is electrically connected to the LDO voltage conversion chip 200, and a second end of the capacitor C1 is grounded. Specifically, the voltage stabilizing module includes a capacitor C2, a first end of the capacitor C2 is electrically connected to the LDO voltage conversion chip 200, and a second end of the capacitor C2 is grounded. Specifically, the voltage stabilizing module includes a capacitor C3, a first end of the capacitor C3 is electrically connected to the LDO voltage conversion chip 200, and a second end of the capacitor C3 is grounded.
[0038] It should be noted that the capacitors C1 , C2 and C3 are voltage-stabilizing capacitors and also play a filtering role.
[0039] See also Figure 2 In one embodiment, the value of capacitor C1 and the value of capacitor C3 are both 1 μF Specifically, the value is 2 μF .
[0040] It should be noted that the present application can also add multiple capacitors, the capacitance value can be 0.1 μF To 4.7 μF , the output voltage is more stable.
[0041] The scheme of the present application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of the various embodiments have their own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the specification are not necessarily required for the present application. In addition, it can be understood that the steps in the method of the embodiment of the present application can be adjusted in order, merged and deleted according to actual needs, and the modules in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.
[0042] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.
Claims
1. A power supply system for a camera module, characterized in that: include: Input module; An LDO voltage conversion chip, wherein the input module is electrically connected to the LDO voltage conversion chip; A first voltage dividing module, electrically connected to the LDO voltage conversion chip; A second voltage dividing module, electrically connected to the LDO voltage conversion chip; The output module includes a first output terminal, a second output terminal and a third output terminal, wherein the first output terminal is electrically connected to the LDO voltage conversion chip, the second output terminal is electrically connected to the first voltage divider module, and the third output terminal is electrically connected to the second voltage divider module.
2. The power supply system of the camera module according to claim 1, characterized in that: The first voltage dividing module includes a resistor R1 , a first end of the resistor R1 is electrically connected to the LDO voltage conversion chip, and a second end of the resistor R1 is electrically connected to the second output end.
3. The power supply system of the camera module according to claim 1, characterized in that: The first voltage dividing module further includes a resistor R2, a first end of the resistor R2 is electrically connected to the LDO voltage conversion chip, and a second end of the resistor R2 is electrically connected to the second output end.
4. The power supply system of the camera module according to claim 1, characterized in that: The second voltage dividing module includes a resistor R3, a first end of the resistor R3 is electrically connected to the LDO voltage conversion chip, and a second end of the resistor R3 is electrically connected to the third output end.
5. The power supply system of the camera module according to claim 1, characterized in that: The second voltage dividing module further includes a resistor R4, a first end of the resistor R4 is electrically connected to the LDO voltage conversion chip, and a second end of the resistor R4 is electrically connected to the third output end.
6. The power supply system of the camera module according to claim 1, characterized in that: It also includes a voltage stabilizing module, which includes a capacitor C1. A first end of the capacitor C1 is electrically connected to the LDO voltage conversion chip, and a second end of the capacitor C1 is grounded.
7. The power supply system of the camera module according to claim 6, characterized in that: The voltage stabilizing module comprises a capacitor C2, a first end of the capacitor C2 is electrically connected to the LDO voltage conversion chip, and a second end of the capacitor C2 is grounded.
8. The power supply system of the camera module according to claim 7, characterized in that: The voltage stabilizing module comprises a capacitor C3, a first end of the capacitor C3 is electrically connected to the LDO voltage conversion chip, and a second end of the capacitor C3 is grounded.
9. The power supply system of the camera module according to claim 8, characterized in that: The value of the capacitor C1 and the value of the capacitor C3 are both 1 μF .
10. The power supply system of the camera module according to claim 8, characterized in that: The value of the capacitor C2 is 2 μF .