CN215734036U - Circuit and terminal equipment of automatic start of electricity - Google Patents
Circuit and terminal equipment of automatic start of electricity Download PDFInfo
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- CN215734036U CN215734036U CN202022958288.7U CN202022958288U CN215734036U CN 215734036 U CN215734036 U CN 215734036U CN 202022958288 U CN202022958288 U CN 202022958288U CN 215734036 U CN215734036 U CN 215734036U
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Abstract
The embodiment of the utility model discloses a circuit for automatically starting up a terminal device by electrifying and a terminal device, which comprise a power supply management module, a power supply module and a voltage division module, wherein the power supply module is respectively connected with the power supply management module and the voltage division module, the power supply module is used for supplying power to the power supply management module and the terminal device, the voltage division module is used for dividing the voltage provided by the power supply module and taking the obtained divided voltage value as a starting detection signal of the power supply management module, if the starting detection signal accords with a preset voltage range, the terminal device is controlled to be electrified and started up, the function of automatically electrifying and starting up the terminal device is realized by only needing hardware, the cost of a resistor can be ignored, and the double effects of saving time and saving cost are realized.
Description
Technical Field
The utility model relates to the field of circuits, in particular to a circuit capable of automatically starting up after being electrified and a terminal device.
Background
Android SOC mainboard based on platforms such as MTK, Rockship not only can be used for ordinary consumer electronics fields such as panel computer, smart mobile phone, can also be used for fields such as industrial monitoring, data monitoring, intelligent house, when being used for these fields, often need the system to go up just can automatic start work.
However, in the current market scheme, a special integrated circuit is mostly adopted to output a starting signal, and the MOS tube is electrified and controlled through a GPIO port, but the design is troublesome, the electronic material demand is high, software debugging is needed, and the cost consumption is increased.
SUMMERY OF THE UTILITY MODEL
In view of the above technical problems, embodiments of the present invention provide a circuit system and a terminal device thereof.
A first aspect of an embodiment of the present invention provides a circuit for powering on and automatically starting up, including: the power supply module is respectively connected with the power supply management module and the voltage dividing module, the power supply module is used for supplying power to the power supply management module and the terminal equipment, the voltage dividing module is used for dividing the voltage provided by the power supply module and taking the obtained divided voltage value as a starting detection signal of the power supply management module, and if the starting detection signal accords with a voltage preset range, the terminal equipment is controlled to be powered on and started. Optionally, the voltage dividing module includes a first voltage dividing resistor and a second voltage dividing resistor, a first end of the first voltage dividing resistor is connected to the power module, a second end of the first voltage dividing resistor is connected to a first end of the second voltage dividing resistor, and a second end of the second voltage dividing resistor is grounded.
Optionally, the second terminal of the first voltage-dividing resistor is connected to the power management module.
Optionally, the preset voltage range is 0.5V-0.55V. Optionally, the voltage value provided by the power supply module is 4.2V.
Optionally, the first voltage-dividing resistor has a resistance of 240K ohms, and the second voltage-dividing resistor has a resistance of 39K ohms.
Optionally, the voltage value of the second end of the first voltage-dividing resistor is 0.52V.
Optionally, the circuit further includes a power supply voltage detection module, the power supply voltage detection module is connected to the power supply management module, and the power supply voltage detection module is configured to detect a voltage value provided by the power supply module.
Optionally, the power module is connected to an external power source through a connection terminal.
The second aspect of the present invention further provides a terminal device, which includes the circuit for powering on and automatically starting up in the first aspect.
In the technical scheme provided by the embodiment of the utility model, the power supply module is respectively connected with the power supply management module and the voltage dividing module, the power supply module is used for supplying power to the power supply management module and the terminal equipment, the voltage dividing module is used for dividing the voltage provided by the power supply module, and the obtained divided voltage value is used as a starting detection signal of the power supply management module, if the starting detection signal conforms to a preset voltage range, the terminal equipment is controlled to be powered on and started, the automatic power-on starting function is realized only by hardware, the cost of a resistor can be ignored, and the double effects of saving time and saving cost are realized.
Drawings
Fig. 1 is a schematic structural diagram of a circuit for powering on and automatically booting according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a connection of a power management module according to an embodiment of the utility model;
fig. 3 is a schematic connection diagram of a terminal according to an embodiment of the present invention;
fig. 4 is a schematic flowchart of a circuit for powering on and automatically booting according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a circuit for powering on and automatically booting a computer according to an embodiment of the present invention, which includes: the power supply module is respectively connected with the power supply management module and the voltage dividing module, the power supply module is used for supplying power to the power supply management module and the terminal equipment, the voltage dividing module is used for dividing the voltage provided by the power supply module and taking the obtained divided voltage value as a starting detection signal of the power supply management module, and if the starting detection signal accords with a voltage preset range, the terminal equipment is controlled to be powered on and started.
Specifically, the power management module is a PMU module, which is a microcontroller for controlling the power supply function of the digital platform, and includes firmware and software, a memory, a CPU, an input/output function, a timer for measuring a time interval, and an analog-to-digital converter for measuring the voltage of the main battery or the power supply, thereby realizing the normal operation of the whole and providing a sufficient power supply.
The power module, such as the VBAT pin in fig. 1, supplies power to the power management module, is connected to the voltage dividing module, and can provide a dc power supply of about 4V, and the power module is connected to an external power input.
In the present invention, after the voltage value provided by the power module is divided by the voltage dividing resistor, the divided voltage value is used as a power on detection signal of the power management module, specifically, VCDT is the power on detection signal, and the voltage value is controlled to be 0.5V-0.55V, which is a development detection voltage set by the main control and the PMU.
Compared with the prior art, the power supply management module, the power supply module and the voltage dividing module are included, the power supply module is respectively connected with the power supply management module and the voltage dividing module, the power supply module is used for supplying power to the power supply management module and the terminal equipment, the voltage dividing module is used for dividing the voltage provided by the power supply module, the obtained divided voltage value is used as a starting detection signal of the power supply management module, if the starting detection signal accords with a preset voltage range, the terminal equipment is controlled to be powered on and started, the automatic power-on and starting functions are achieved only by hardware, the cost of a resistor can be ignored, and the double effects of saving time and saving cost are achieved.
On the basis of the above embodiment, a specific description is made on the above embodiment, and the present invention provides a circuit system, including a power management module, a power module, and a voltage division module, where the power module is connected to the power management module and the voltage division module, the power module is configured to supply power to the power management module and a terminal device, the voltage division module is configured to divide voltage provided by the power module, and use an obtained divided voltage value as a power on detection signal of the power management module, and if the power on detection signal conforms to a preset voltage range, the terminal device is controlled to be powered on and powered on.
Specifically, the power management module is a PMU module, which is a microcontroller for controlling the power supply function of the digital platform, and includes firmware and software, a memory, a CPU, an input/output function, a timer for measuring a time interval, and an analog-to-digital converter for measuring the voltage of the main battery or the power supply, thereby realizing the normal operation of the whole and providing a sufficient power supply.
The power module, such as the VBAT pin in fig. 1, supplies power to the power management module, is connected to the voltage dividing module, and can provide a dc power supply of about 4V, and is connected to an external power supply through a connection terminal, as shown in fig. 3.
The circuit further comprises a power supply voltage detection module, the power supply voltage detection module is connected with the power supply management module, and the power supply voltage detection module is used for detecting the voltage value provided by the power supply module. Such as the CHRLDO pin shown in fig. 2.
In the present invention, after the voltage value provided by the power module is divided by the voltage dividing resistor, the divided voltage value is used as a power on detection signal of the power management module, specifically, VCDT is the power on detection signal, and the voltage value is controlled to be 0.5V-0.55V, which is a development detection voltage set by the main control and the PMU.
The voltage dividing module comprises a first voltage dividing resistor and a second voltage dividing resistor, wherein a first end of the first voltage dividing resistor is connected with the power supply module, a second end of the first voltage dividing resistor is connected with a first end of the second voltage dividing resistor, and a second end of the second voltage dividing resistor is grounded. And the second end of the first voltage-dividing resistor is connected with the power management module.
Specifically, if the voltage value provided by the power module is 4.2V, the resistance value of the first voltage-dividing resistor is 240K ohms, and the resistance value of the second voltage-dividing resistor is 39K ohms, at this time, the voltage value of the second end of the first voltage-dividing resistor is 0.52V, that is, the voltage value of the VCDT end is 0.52V.
As shown in fig. 4, that is, when the external input voltage of VBAT is 4.2V, when the resistance value of R3 is 240K ohms and the resistance value of R4 is 39K ohms, R3 and R4 are voltage dividing resistors, and after voltage division, the voltage of VCDT is calculated to be about 0.52, which reaches the detection voltage value for PMU power-on, and then the PMU is directly powered on.
The utility model also provides terminal equipment which comprises the circuit for automatically starting up after power-on.
The above description of the embodiments of the present invention, and the following description of the embodiments of the present invention refer to fig. 1 to 4, and the embodiments of the present invention include: when the USB interface is normally operated, U1 bit is PMU module (power supply IC), CON1 module bit is external power supply interface, VBAT module is external input direct current power supply of about 4V, VCDT module is start-up detection signal, voltage must be controlled at 0.5V-0.55V, the voltage is development detection voltage set by main control and PMU module, CHRLDO module external power supply access detection voltage, when VBAT module external input voltage is 4.2V, when R3 resistance value is 240K ohm, R4 resistance value is 39K ohm, R3 and R4 are voltage dividing resistors, after voltage division, the voltage of VCDT module is calculated to be about 0.52V, PMU module power-on detection voltage value is reached, and direct power-on, automatic power-on function is realized, and simultaneously, the USB interface can be ensured to normally transmit data or OTG function, because charging detection and charging IC are omitted, the cost of charging is saved. The utility model judges whether to electrify or not by utilizing the voltage value of the divided voltage, the cost of the resistor can be ignored, and the double effects of saving time and saving cost are realized, so the practicability is wider, the requirements of places such as restaurants, hotels, markets, billboards and the like are well met, and the integral novelty is improved.
Compared with the prior art, the embodiment of the utility model achieves 0.52V required by the PMU module for power-on and power-on through simple voltage division, realizes the automatic power-on and power-on functions only by hardware, can ignore the cost of the resistor, and realizes the double effects of saving time and cost, thereby having wider practicability, well meeting the requirements of restaurants, hotels, markets, billboards and other places and improving the overall novelty.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A circuit for automatically starting up after power-on is characterized in that: the power supply module is respectively connected with the power supply management module and the voltage dividing module, the power supply module is used for supplying power to the power supply management module and the terminal equipment, the voltage dividing module is used for dividing the voltage provided by the power supply module and taking the obtained divided voltage value as a starting detection signal of the power supply management module, and if the starting detection signal accords with a voltage preset range, the terminal equipment is controlled to start.
2. The circuit of claim 1, wherein: the voltage division module comprises a first voltage division resistor and a second voltage division resistor, wherein a first end of the first voltage division resistor is connected with the power supply module, a second end of the first voltage division resistor is connected with a first end of the second voltage division resistor, and a second end of the second voltage division resistor is grounded.
3. The circuit of claim 2, wherein: and the second end of the first voltage-dividing resistor is connected with the power management module.
4. The circuit of claim 1, wherein: the preset voltage range is 0.5V-0.55V.
5. The circuit of claim 2, wherein: the voltage value provided by the power supply module is 4.2V.
6. The circuit of claim 5, wherein: the resistance value of the first divider resistor is 240K ohms, and the resistance value of the second divider resistor is 39K ohms.
7. The circuit of claim 6, wherein: the voltage value of the second end of the first voltage-dividing resistor is 0.52V.
8. The circuit of claim 1, wherein: the circuit further comprises a power supply voltage detection module, the power supply voltage detection module is connected with the power supply management module, and the power supply voltage detection module is used for detecting the voltage value provided by the power supply module.
9. The circuit of claim 5, wherein: the power supply module is connected with an external power supply through a wiring terminal.
10. A terminal device comprising a power-on auto-on circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022958288.7U CN215734036U (en) | 2020-12-09 | 2020-12-09 | Circuit and terminal equipment of automatic start of electricity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022958288.7U CN215734036U (en) | 2020-12-09 | 2020-12-09 | Circuit and terminal equipment of automatic start of electricity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215734036U true CN215734036U (en) | 2022-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022958288.7U Active CN215734036U (en) | 2020-12-09 | 2020-12-09 | Circuit and terminal equipment of automatic start of electricity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215734036U (en) |
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2020
- 2020-12-09 CN CN202022958288.7U patent/CN215734036U/en active Active
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