CN213367638U - Vehicle-mounted panoramic camera power supply circuit and vehicle-mounted panoramic camera system - Google Patents
Vehicle-mounted panoramic camera power supply circuit and vehicle-mounted panoramic camera system Download PDFInfo
- Publication number
- CN213367638U CN213367638U CN202022248706.3U CN202022248706U CN213367638U CN 213367638 U CN213367638 U CN 213367638U CN 202022248706 U CN202022248706 U CN 202022248706U CN 213367638 U CN213367638 U CN 213367638U
- Authority
- CN
- China
- Prior art keywords
- power supply
- vehicle
- power
- pins
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a vehicle-mounted looking-around camera power supply circuit and a vehicle-mounted looking-around camera system, wherein the vehicle-mounted looking-around camera power supply circuit comprises a power management chip and a BOOST chip electrically connected with the power management chip, and the BOOST chip is used for converting the voltage of a vehicle-mounted storage battery into the power supply voltage for the output of the power management chip; the power management chip comprises a plurality of voltage output pins, and each voltage output pin is used for outputting power supply voltage to a corresponding camera so as to supply power. The utility model discloses a BOOST chip converts unstable vehicle-mounted battery voltage into the supply voltage who is used for power management chip output, has ensured that the camera can work under stable supply voltage.
Description
Technical Field
The utility model belongs to the technical field of the camera is looked around to the on-vehicle, concretely relates to camera supply circuit is looked around to on-vehicle and camera system is looked around to on-vehicle.
Background
The vehicle-mounted all-round-looking camera system comprises four cameras, and each camera is independently powered by POC (Power Over coaxial). The voltage output by the existing vehicle-mounted all-round looking camera system is the following battery voltage, and the battery voltage on the vehicle can fluctuate frequently, so that the power supply of the camera is unstable, and the normal work of the camera is influenced.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a technical problem that will solve lies in, and current on-vehicle look around camera supply circuit power supply is unstable, influences the normal work of camera. In order to solve the technical problems, the utility model provides a vehicle-mounted panoramic camera power supply circuit and a vehicle-mounted panoramic camera system, wherein the vehicle-mounted panoramic camera power supply circuit comprises a power management chip and a BOOST chip electrically connected with the power management chip,
the BOOST chip is used for converting the voltage of the vehicle-mounted storage battery into a power supply voltage for the output of the power supply management chip;
the power management chip comprises a plurality of voltage output pins, and each voltage output pin is used for outputting power supply voltage to a corresponding camera to supply power.
The vehicle-mounted panoramic camera power supply circuit further comprises an MCU chip, and the MCU chip comprises a plurality of output control pins;
the power management chip comprises a plurality of power supply enabling pins, and the output control pins are respectively connected with the power supply enabling pins in a one-to-one correspondence manner and used for increasing or decreasing the level of the power supply enabling pins; the power supply enabling pin is used for controlling the corresponding voltage output pin to output power supply voltage when the power supply enabling pin is at a high level and controlling the corresponding voltage output pin to stop outputting the power supply voltage when the power supply enabling pin is at a low level.
The vehicle-mounted looking-around camera power supply circuit is characterized in that the power management chip comprises a plurality of power state pins, and the MCU chip comprises a plurality of power detection pins which are respectively connected with the power state pins in a one-to-one correspondence manner;
the power supply state pins are used for respectively detecting the power supply states of the corresponding voltage output pins and outputting low levels to the corresponding power supply detection pins when the power supply states are abnormal; and the power supply detection pin is used for pulling down the level of the corresponding power supply enabling pin when detecting the low level output by the power supply state pin so as to stop outputting the power supply voltage.
In the power supply circuit of the vehicle-mounted all-round-looking camera, the power detection pin is further used for resetting the corresponding power supply enabling pin again after the level of the corresponding power supply enabling pin is lowered to stop outputting the power supply voltage.
The power supply circuit of the vehicle-mounted all-round-looking camera further comprises a first resistor, and the power management chip further comprises a current-limiting pin; one end of the first resistor is connected with the current-limiting pin, and the other end of the first resistor is grounded and used for limiting the output current of the voltage output pin.
The power supply circuit of the vehicle-mounted all-around camera further comprises a second resistor, the power management chip further comprises a detection enabling pin, one end of the second resistor is connected with the detection enabling pin, the other end of the second resistor is connected with a direct-current power supply, and the second resistor is used for providing pull-up current for the detection enabling pin.
The vehicle-mounted all-round camera power supply circuit is characterized in that the voltage of the direct current power supply is 3.3V.
The power supply circuit of the vehicle-mounted all-round-looking camera is characterized in that the power supply voltage output by the power management chip is 9V.
The vehicle-mounted all-around camera power supply circuit is characterized in that the number of the voltage output pins, the power supply enabling pins and the power supply state pins of the power supply management chip is four, and the number of the output control pins and the number of the power supply detection pins of the MCU chip are four.
The utility model provides a camera system is looked around to on-vehicle, includes as above the camera power supply circuit is looked around to on-vehicle to and be connected to the camera of each voltage output pin respectively.
Implement the embodiment of the utility model provides a, following beneficial effect has: the utility model discloses a BOOST chip converts unstable vehicle-mounted battery voltage into the supply voltage who is used for power management chip output, has ensured that the camera can work under stable supply voltage.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is the embodiment of the utility model provides a camera power supply circuit schematic diagram is looked around to on-vehicle one kind.
Detailed Description
The following description of the embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments in which the invention may be practiced.
Referring to fig. 1, an embodiment of the present invention provides a power supply circuit for a vehicle-mounted panoramic camera, including a BOOST chip (device 1) and a power management chip (device 2). One end of the BOOST chip is connected with the vehicle-mounted storage battery, the other end of the BOOST chip is connected with the power management chip, and the BOOST chip is used for converting the voltage of the vehicle-mounted storage battery into a power supply voltage for the output of the power management chip; the power management chip comprises four voltage output pins, each voltage output pin is used for outputting a power supply voltage to a corresponding camera to supply power, wherein the power management chip can be TPS4H000AQPWPRQ1, and the BOOST chip can be selected according to cost and performance.
The utility model discloses a BOOST chip converts unstable vehicle-mounted battery voltage (undulant at 6 ~ 16V scope generally) into the supply voltage who is used for power management chip output, for example 9V, has ensured that the camera can work under stable supply voltage.
Furthermore, the power supply circuit of the vehicle-mounted all-round-looking camera also comprises an MCU chip (device 3), wherein the type of the MCU chip can be selected according to cost and performance and comprises four output control pins; the power management chip comprises four power supply enabling pins (IN1/IN2/IN3/IN4), and the output control pins are respectively connected with the power supply enabling pins IN a one-to-one correspondence manner and used for pulling up or pulling down the level of the power supply enabling pins; the power supply enabling pin is used for controlling the corresponding voltage output pin to output the power supply voltage when the high level is high, and controlling the corresponding voltage output pin to stop outputting the power supply voltage when the low level is low. The power management chip can also comprise four power state pins (ST1/ST2/ST3/ST4), and the MCU chip comprises four power detection pins which are respectively connected with the power state pins in a one-to-one correspondence manner; the power supply state pins are used for respectively detecting the power supply states of the corresponding voltage output pins and outputting low levels to the corresponding power supply detection pins when the power supply states are abnormal; the power supply detection pin is used for pulling down the level of the corresponding power supply enabling pin when detecting the low level output by the power supply state pin so as to stop outputting the power supply voltage. Meanwhile, when the power detection pin of the MCU is also used for pulling down the level of the corresponding power supply enabling pin to stop outputting the power supply voltage, the power supply enabling pin (IN1/IN2/IN3/IN4) of the corresponding camera is reset again, so that the camera is powered on and off again, and the normal work of the camera is recovered.
Under normal conditions, the MCU chip can pull up the power supply enabling pin (IN1/IN2/IN3/IN4) so that the power management chip can work normally to output four paths of voltage to supply power to the camera. When the power management chip detects that a certain path of output voltage is abnormal, for example, the power supply voltage of the first path of camera is not IN a set range, a low level signal is sent through a corresponding power state pin (ST1), and after the MCU chip receives the low level signal of the ST1 pin, the power supply enabling pin (IN1) of the corresponding power management chip is pulled down, so that the power supply of the first path of camera is cut off, and the damage to components is avoided.
In the embodiment, a single four-in-one power management chip is adopted to output four paths of power supplies which are not influenced mutually, each path of power supply output can be controlled independently, and the working state of each path of output power supply can be detected independently. Compare the scheme that four power chips of traditional adoption give four ways of camera power supplies respectively, the power supply scheme of this embodiment is simpler, and the stable performance is reliable, has reduced development work load moreover, is fit for big batch volume production.
Further, the utility model discloses a camera power supply circuit can also include current-limiting circuit is looked around to the on-vehicle. Specifically, a first resistor R1 is arranged, and the power management chip further comprises a current-limiting pin; one end of the first resistor is connected with the current-limiting pin, and the other end of the first resistor is grounded and used for limiting the output current of the voltage output pin. The upper limit of the output current can be configured in advance, and when the output current of a certain path is larger than the configured upper limit of the output current, the power management chip can turn off the voltage output of the corresponding line, so that the power chip is protected.
In order to enable the power supply enabling pin of the power management chip to work normally, a second resistor R2 may be further provided, the power management chip further includes a detection enabling pin, one end of the second resistor is connected to the detection enabling pin, and the other end of the second resistor is connected to the dc power supply for providing a pull-up current for the detection enabling pin. Optionally, the voltage of the dc power supply is 3.3V.
In this embodiment, both R1 and R2 may be 1k Ω 0402 packaged resistive elements.
The utility model also provides a camera system is looked around to on-vehicle, look around camera supply circuit and be connected to the camera of each voltage output pin respectively including foretell on-vehicle.
About the theory of operation and the process of the on-vehicle camera system of looking around of this embodiment, refer to the aforesaid the utility model discloses embodiment one's explanation, it is no longer repeated here.
As can be seen from the above description, compared with the prior art, the beneficial effects of the utility model reside in: the utility model adopts a BOOST chip, which can convert unstable voltage of the storage battery into stable voltage, and avoid the camera from working normally caused by voltage fluctuation of the storage battery; and the utility model discloses a take the four unification power management chip schemes of independent control and independent detection, used peripheral components and parts are very few, and the scheme is simple, reduces development work load, and the stable performance is reliable, is fit for big batch volume production.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (10)
1. A power supply circuit for a vehicle-mounted all-round-looking camera is characterized by comprising a power management chip and a BOOST chip electrically connected with the power management chip,
the BOOST chip is used for converting the voltage of the vehicle-mounted storage battery into a power supply voltage for the output of the power supply management chip;
the power management chip comprises a plurality of voltage output pins, and each voltage output pin is used for outputting power supply voltage to a corresponding camera to supply power.
2. The vehicle-mounted looking-around camera power supply circuit according to claim 1, further comprising an MCU chip, wherein the MCU chip comprises a plurality of output control pins;
the power management chip comprises a plurality of power supply enabling pins, and the output control pins are respectively connected with the power supply enabling pins in a one-to-one correspondence manner and used for increasing or decreasing the level of the power supply enabling pins; the power supply enabling pin is used for controlling the corresponding voltage output pin to output power supply voltage when the power supply enabling pin is at a high level and controlling the corresponding voltage output pin to stop outputting the power supply voltage when the power supply enabling pin is at a low level.
3. The power supply circuit of the vehicle-mounted all-round camera according to claim 2, wherein the power management chip comprises a plurality of power status pins, and the MCU chip comprises a plurality of power detection pins which are respectively connected with the power status pins in a one-to-one correspondence manner;
the power supply state pins are used for respectively detecting the power supply states of the corresponding voltage output pins and outputting low levels to the corresponding power supply detection pins when the power supply states are abnormal; and the power supply detection pin is used for pulling down the level of the corresponding power supply enabling pin when detecting the low level output by the power supply state pin so as to stop outputting the power supply voltage.
4. The power supply circuit for the vehicle-mounted all-around camera according to claim 3, wherein the power detection pin is further configured to reset the corresponding power enable pin after pulling down the power level of the corresponding power enable pin to stop outputting the power supply voltage.
5. The vehicle-mounted looking-around camera power supply circuit according to claim 1, further comprising a first resistor, wherein the power management chip further comprises a current limiting pin; one end of the first resistor is connected with the current-limiting pin, and the other end of the first resistor is grounded and used for limiting the output current of the voltage output pin.
6. The vehicle-mounted looking-around camera power supply circuit according to claim 1, further comprising a second resistor, wherein the power management chip further comprises a detection enable pin, and one end of the second resistor is connected to the detection enable pin, and the other end of the second resistor is connected to a direct current power supply for providing a pull-up current for the detection enable pin.
7. The vehicle-mounted surround view camera power supply circuit according to claim 6, wherein the voltage of the direct current power supply is 3.3V.
8. The vehicle-mounted surround view camera power supply circuit according to any one of claims 1 to 7, wherein the power supply voltage output by the power management chip is 9V.
9. The power supply circuit for the vehicle-mounted all-around camera according to claim 3, wherein the number of the voltage output pins, the power supply enable pins and the power supply state pins of the power management chip is four, and the number of the output control pins and the number of the power supply detection pins of the MCU chip are four.
10. A vehicle-mounted around-the-eye camera system, characterized by comprising the vehicle-mounted around-the-eye camera power supply circuit according to any one of claims 1 to 9, and cameras respectively connected to the voltage output pins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022248706.3U CN213367638U (en) | 2020-10-10 | 2020-10-10 | Vehicle-mounted panoramic camera power supply circuit and vehicle-mounted panoramic camera system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022248706.3U CN213367638U (en) | 2020-10-10 | 2020-10-10 | Vehicle-mounted panoramic camera power supply circuit and vehicle-mounted panoramic camera system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213367638U true CN213367638U (en) | 2021-06-04 |
Family
ID=76127426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022248706.3U Active CN213367638U (en) | 2020-10-10 | 2020-10-10 | Vehicle-mounted panoramic camera power supply circuit and vehicle-mounted panoramic camera system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213367638U (en) |
-
2020
- 2020-10-10 CN CN202022248706.3U patent/CN213367638U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102156524B (en) | adaptive universal serial bus charging method and system | |
| CN107591859B (en) | Wireless charging receiving controller protection method and device | |
| CN105788556B (en) | A kind of overvoltage crowbar and method, liquid crystal display drive circuit | |
| CN109358548A (en) | A kind of charging method of automotive diagnostic system, vehicle diagnosis and automotive diagnostic unit | |
| CN212751771U (en) | Protection circuit, power supply system of hard disk device and vehicle-mounted device | |
| CN110187286B (en) | Detection circuitry, electrical power generating system and vehicle of copper bar connection status | |
| CN213367638U (en) | Vehicle-mounted panoramic camera power supply circuit and vehicle-mounted panoramic camera system | |
| CN101615780A (en) | Intelligent power supply protector | |
| CN108733117B (en) | A kind of line drop control device of servo mechanism power supply distal end pressure stabilizing | |
| CN110707660A (en) | Load overcurrent protection circuit | |
| CN112860045A (en) | Low-voltage input power-down data protection system and protection method | |
| CN112003464A (en) | Power-down holding circuit for switching power supply of airborne electronic equipment | |
| CN110971216B (en) | Overcurrent protection circuit | |
| CN201584744U (en) | Intelligent power supply protector | |
| CN213521351U (en) | Bus power supply circuit and system | |
| CN216355945U (en) | Dual overvoltage protection circuit | |
| CN214707259U (en) | Detect outside temperature automatic switch-over protection circuit | |
| CN214506546U (en) | No-load protection circuit | |
| CN205355781U (en) | Area is to ground short -circuit protection's high limit drive circuit | |
| CN210640869U (en) | Output circuit and servo driver | |
| CN206442103U (en) | A kind of inexpensive high-definition digital sound equipment multichannel short-circuit protection circuit | |
| US20200026676A1 (en) | Usb expansion function device | |
| WO2019100300A1 (en) | Charging circuit and electronic device | |
| CN221669556U (en) | Reverse connection preventing power supply circuit for direct current power supply control circuit | |
| CN218648565U (en) | Overcurrent protection circuit of optical module and optical module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |