CN113031739B - Computer and power-on starting circuit thereof - Google Patents
Computer and power-on starting circuit thereof Download PDFInfo
- Publication number
- CN113031739B CN113031739B CN202110327771.1A CN202110327771A CN113031739B CN 113031739 B CN113031739 B CN 113031739B CN 202110327771 A CN202110327771 A CN 202110327771A CN 113031739 B CN113031739 B CN 113031739B
- Authority
- CN
- China
- Prior art keywords
- power
- computer
- circuit
- switch
- resistor
- 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
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Power Sources (AREA)
Abstract
The application discloses power-on starting circuit of computer includes: the method comprises the steps that a pre-stage circuit is powered on, and the output end of the pre-stage circuit is used as the anode of the total power supply end of the computer system; the input end of the switch control circuit is connected with the output end of the power-on starting preceding stage circuit, the output end of the switch control circuit is connected with the input end of the power-on starting following stage circuit, when the computer is powered by the adapter, the switch control circuit is switched on, when the computer is powered by the energy storage unit and is in a power-off state, the switch control circuit is switched off, and when the computer is powered by the energy storage unit and is started, the switch control circuit is switched on; the power-on starting rear-stage circuit is used for providing standby voltage when the input end of the power-on starting rear-stage circuit is powered on, so that the computer is started based on the standby voltage after receiving the starting signal. By applying the scheme of the application, the standing use time of the computer can be effectively prolonged. The application also provides a computer with corresponding technical effects.
Description
Technical Field
The invention relates to the technical field of circuits, in particular to a computer and a power-on starting circuit thereof.
Background
The notebook computer has the greatest advantage of strong mobility, can be used anytime and anywhere, and can cope with emergencies. When power is suddenly cut off, the notebook computer cannot be suddenly shut down, so that work and data are lost and a hard disk is damaged, namely, the notebook computer can be continuously used for several hours through a built-in battery under the condition of no power. Therefore, the standing service life of the battery is an important index for measuring the performance of the note.
In practical applications, a situation is usually encountered in which the notebook computer cannot be powered on when the power button of the notebook computer is pressed after the notebook computer is unplugged from the adapter and is powered off and left standing for a period of time, because the battery power of the notebook computer is exhausted, and the notebook computer must be reconnected to the adapter to be used normally.
Referring to fig. 1, which is a schematic diagram of a power-on startup circuit of a conventional notebook computer, when an adapter is connected, a PMOS switching1 IN fig. 1 is turned on, an output voltage of the adapter is represented as + VAC _ IN _ L, and at this time, the adapter can supply power to the computer and charge a battery through a charge IC. If no adapter is connected, the PMOS switching2 in FIG. 1 is turned on, and the system is powered by the output of the battery + VBATT. After the notebook computer is turned off, the positive electrode of the system main power supply terminal is powered, i.e., V + of fig. 1 is powered, and the notebook computer also needs to maintain the standby voltage, i.e., standby voltage, by using V +. Due to the existence of standby voltage, the notebook computer still has standing current after being shut down, which belongs to an S5 state of power management and needs to be maintained by standby voltage, so that a user presses down a power key after the notebook computer is shut down and needs to be subsequently powered on, and the system can be normally started based on the standby voltage. If the adapter is not connected after the computer is shut down, the electric quantity of the battery is gradually consumed by the standby voltage, so that the computer cannot be started without the adapter, as described above, and the standing use time of the computer is short.
In summary, how to effectively increase the standing use time of a computer is a technical problem that those skilled in the art are urgently required to solve.
Disclosure of Invention
The invention aims to provide a computer and a power-on starting circuit thereof, so as to effectively prolong the standing use time of the computer.
In order to solve the technical problems, the invention provides the following technical scheme:
a power-on startup circuit of a computer, comprising:
the method comprises the steps that a power-on starting preceding-stage circuit is powered on, and the output end of the power-on starting preceding-stage circuit is used as the anode of the total system power supply end of the computer;
the input end of the switch control circuit is connected with the output end of the power-on starting preceding-stage circuit, the output end of the switch control circuit is connected with the input end of the power-on starting subsequent-stage circuit, when the computer is powered by an adapter, the switch control circuit is switched on, when the computer is powered by an energy storage unit and is in a power-off state, the switch control circuit is switched off, and when the computer is powered by an energy storage unit and is started, the switch control circuit is switched on;
the power-on starting rear-stage circuit is used for providing a standby voltage when the input end of the power-on starting rear-stage circuit is powered on, so that the computer is started based on the standby voltage after receiving a starting signal.
Preferably, the switch control circuit includes:
a first resistor;
the first switch unit is connected with the first end of the first resistor and used as the input end of the switch control circuit, the second end of the switch control circuit is used as the output end of the switch control circuit, and the control end of the first switch unit is respectively connected with the second end of the first resistor and the first end of the second switch unit;
the second switch unit is connected with the second end of the second resistor, the control end of the second switch unit is connected with the first end of the second resistor, the cathode of the first diode, the cathode of the second diode and the cathode of the third diode;
the second resistor with the second end grounded;
the first diode with the anode connected with a main power signal;
the anode of the second diode is connected with a power switch signal;
the third diode with the anode connected with the adapter input signal;
the power-on sequence control circuit is used for controlling the main power supply signal to be kept at a high level when the power supply switch signal is detected to jump from a low level of a default state to a high level;
and, when the computer is powered by an adapter, the adapter input signal is high; when the computer is started, the power switch signal jumps from a low level to a high level in a default state and is maintained for at least a first time length; when the control end of the first switch unit is at a low level, the first switch unit is conducted; when the control end of the second switch unit is at a high level, the second switch unit is turned on.
Preferably, the switch control circuit further includes:
a first current limiting resistor disposed at an anode of the first diode;
the second current limiting resistor is arranged at the anode of the second diode;
and the third current limiting resistor is arranged at the anode of the third diode.
Preferably, the switch control circuit further includes:
and the first end of the first filter capacitor is connected with the second end of the first switch unit, and the second end of the first filter capacitor is grounded.
Preferably, the power switch signal is a power switch signal generated by a key trigger circuit, and the key trigger circuit includes:
the input end of the automatic rebounding key is connected with the positive electrode of the system main power supply end of the computer, the output end of the automatic rebounding key is connected with the first end of the first capacitor, the default state is an off state, and when the automatic rebounding key is pressed down, the automatic rebounding key is switched on;
the second end of the first capacitor is grounded, and an electric signal of the first end of the first capacitor is used as the power switch signal.
Preferably, the key trigger circuit further comprises:
and the first end of the fourth resistor is connected with the first end of the first capacitor, and the second end of the fourth resistor is grounded.
Preferably, the power-on signal is a power-on signal generated by a power-on input circuit, and the power-on input circuit includes:
the first end of the third resistor is connected with the control end of the second capacitor and the control end of the third switching unit;
the second capacitor with the second end grounded;
the third switch unit, the second end of which is grounded and the first end of which is connected with the second end of the first pull-up resistor;
the first pull-up resistor is connected with a preset high level at a first end;
and the electric signal of the first end of the third switch unit is used as the starting signal of the computer.
Preferably, the capacitance value of the second capacitor and the resistance value of the third resistor both pass t = R 3 C 2 In ((E-V)/E);
wherein t is a preset delay time, E is the voltage of the power switch signal, V is the turn-on voltage of the third switch unit, and R is 3 Is the resistance value of the third resistor, C 2 Is the capacitance value of the second capacitor.
A computer comprising the power-on start-up circuit of any one of the above computers.
Preferably, the computer is a notebook computer.
By applying the technical scheme provided by the embodiment of the invention, the switch control circuit is arranged between the power-on starting front-stage circuit and the power-on starting rear-stage circuit so as to prolong the standing use time of the computer. Specifically, the output end of the power-on starting preceding stage circuit is used as the anode of the system main power supply end of the computer, and when the computer is powered by the adapter, the switch control circuit is conducted, so that when the computer is powered by the adapter, the input end of the power-on starting subsequent stage circuit can be normally powered, namely, the standby voltage can normally exist, and the computer can be started based on the standby voltage after receiving the starting signal. When the computer is powered by the energy storage unit and is in a power-off state, the switch control circuit is switched off, at the moment, the input end of the power-on starting rear-stage circuit is not powered, so that standby voltage does not exist, the problem that the standby voltage consumes the electric energy of the energy storage unit in the traditional scheme can not occur, the standing and using time of the computer is effectively prolonged, and the standing and using time of the computer is prolonged. When the computer is powered by the energy storage unit and the computer is started, the switch control circuit can be conducted, so that the input end of the power-on starting rear-stage circuit can be normally powered on at the moment, and the standby voltage can normally exist at the moment, so that the computer can be started based on the standby voltage after receiving the starting signal. To sum up, the scheme of the application can effectively prolong the standing service life of the computer.
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 the drawings without creative efforts.
Fig. 1 is a schematic diagram of a power-on startup circuit of a conventional notebook computer;
FIG. 2 is a schematic diagram of a power-on start circuit of a computer according to the present invention;
FIG. 3 is a schematic diagram of a power-on pre-stage circuit according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a switch control circuit according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a key trigger circuit according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a power-on input circuit according to an embodiment of the present invention.
Detailed Description
The core of the invention is to provide a power-on starting circuit of a computer, which can effectively improve the standing use time of the computer.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be apparent that the described embodiments are only some embodiments of the present invention, and not all 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.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a power-on startup circuit of a computer according to the present invention, where the power-on startup circuit of the computer may include:
electrifying to start the pre-stage circuit 201, and taking the output end of the electrifying to start the pre-stage circuit 201 as the anode of the total system power supply end of the computer;
the input end of the switch control circuit 202 is connected with the output end of the power-on starting pre-stage circuit 201, the output end of the switch control circuit 202 is connected with the input end of the power-on starting post-stage circuit 203, when the computer is powered by the adapter, the switch control circuit 202 is switched on, when the computer is powered by the energy storage unit and is in a power-off state, the switch control circuit 202 is switched off, and when the computer is powered by the energy storage unit and is started, the switch control circuit 202 is switched on;
the power-on start-up post-stage circuit 203 is configured to provide a standby voltage when an input terminal of the power-on start-up post-stage circuit 203 is powered on, so that the computer is powered on based on the standby voltage after receiving the power-on signal.
Specifically, the output end of the power-on start-up pre-stage circuit 201 serves as the positive electrode of the system main power supply end of the computer, and the specific circuit configuration of the power-on start-up circuit can be set according to actual needs, so that the purpose of the application can be achieved, that is, the output end of the power-on start-up pre-stage circuit can serve as the positive electrode of the system main power supply end of the computer. It will be appreciated that the power-on startup circuit should be able to support adapter powering as well as energy storage unit powering as the positive pole of the computer's system mains. For example, in a specific case, the power-on pre-stage 201 adopts the structure of fig. 3, and in this case, the + V of fig. 3 is the positive electrode of the system main power source terminal of the computer. When the adapter is connected, the voltage of + V is provided by the adapter, and when the adapter is not connected, the voltage of + V is provided by the energy storage unit. The energy storage unit is usually a rechargeable battery, and of course, in other occasions, other types of energy storage devices can be selected as the energy storage unit according to needs.
The switch control circuit 202 is arranged between a power-on starting pre-stage circuit 201 and a power-on starting post-stage circuit 203. When the computer is powered by the adapter, the switch control circuit 202 is turned on, that is, when the computer is powered by the adapter, no matter in the power-on state or the power-off state, the input end of the power-on starting post-stage circuit 203 is powered, and at this time, the power-on starting post-stage circuit 203 can provide a standby voltage, that is, a standby voltage, so that if the computer needs to be started, a user only needs to press a power-on key to enable the computer to receive a power-on signal, and the computer can be started based on the standby voltage.
When the computer is powered by the energy storage unit and is in a shutdown state, the switch control circuit 202 is turned off, so that the input end of the power-on starting rear-stage circuit 203 is unpowered at the moment, that is, the computer does not maintain a standby voltage, so that the scheme of the application can not generate a standing current due to the standby voltage when the computer is powered by the energy storage unit and is in the shutdown state, thereby reducing the electric energy loss of the energy storage unit, effectively prolonging the standing use time of the computer, namely prolonging the standby time of the computer.
When the computer is powered by the energy storage unit and the computer is turned on, the switch control circuit 202 is turned on. The computer booting described herein means that a user performs a booting operation, and usually presses a corresponding key or button to implement the booting operation, and certainly, other specific occasions may also have other ways of triggering booting, which may be set according to actual needs, and does not affect the implementation of the present invention.
When a user starts the computer, the switch control circuit 202 of the present application is turned on, so that the input terminal of the power-on start-up post-stage circuit 203 can be powered on, at this time, the power-on start-up post-stage circuit 203 can provide a standby voltage, and the computer receiving the start-up signal can be started based on the standby voltage.
The specific circuit configuration of the power-on starting rear-stage circuit 203 can be set according to actual needs, and a function of converting the voltage at the input end of the power-on starting rear-stage circuit 203 into a standby voltage can be realized, for example, in a specific occasion, in consideration of convenience in application of the scheme of the present application, the original power-on starting rear-stage circuit 203 of the computer can be adopted as the power-on starting rear-stage circuit 203 of the present application, that is, the scheme of the present application is applied, and only the switch control circuit 202 described in the present application needs to be newly added between the power-on starting rear-stage circuit 203 and the power-on starting front-stage circuit 201.
The specific structure of the switch control circuit 202 for implementing the present application may be various, and it is sufficient to implement the function of the switch control circuit 202 for implementing the present application, for example, in an embodiment of the present invention, referring to fig. 4, the switch control circuit 202 includes:
a first resistor R1;
a first switch unit Q1 having a first end connected to the first end of the first resistor R1 and serving as an input end of the switch control circuit 202, a second end serving as an output end of the switch control circuit 202, and a control end connected to the second end of the first resistor R1 and the first end of the second switch unit Q2, respectively;
the second switch unit Q2 is grounded at the second end, and the control end is respectively connected with the first end of the second resistor R2, the cathode of the first diode D1, the cathode of the second diode D2 and the cathode of the third diode D3;
a second resistor R2 with a second end grounded;
a first diode D1 with an anode connected with a main power signal;
a second diode D2 with the anode connected with the power switch signal;
a third diode D3 having an anode connected to the adapter input signal;
the power-on sequence control circuit is used for controlling the main power supply signal to be kept at a high level when the power supply switch signal is detected to jump from a low level to a high level in a default state;
when the computer is powered by the adapter, the input signal of the adapter is in a high level; when the computer is started, the power switch signal jumps from the low level of the default state to the high level and is maintained for at least a first time length; when the control end of the first switch unit Q1 is at a low level, the first switch unit Q1 is conducted; when the control terminal of the second switching unit Q2 is at a high level, the second switching unit Q2 is turned on.
As can be seen from fig. 4, when the computer is powered by the adapter, the adapter input signal is high, i.e., + VAC _ IN _ L IN fig. 4 is high, when the control terminal of the second switching unit Q2 is high, the second switching unit Q2 is turned on, and when the control terminal of the first switching unit Q1 is low, the first switching unit Q1 is turned on, so that both the first switching unit Q1 and the second switching unit Q2 are turned on at this time. The first switching unit Q1 is turned on, which means that the switch control circuit 202 is turned on, i.e. the output + VBAT of the switch control circuit 202 is live at this time.
In fig. 4, the first switch unit Q1 is a PMOS transistor, and the second switch unit Q2 is an NMOS transistor, and in other specific situations, other types of switch transistors may be selected, which meets the limitation of the application on the on-off condition of the first switch unit Q1 and the second switch unit Q2.
The default state of the power switch signal is a low level, when the computer is powered by the energy storage unit and the computer is IN the shutdown state, the adapter input signal + VAC _ IN _ L, the power switch signal EC _ PWRSW, and the main power signal main _ EC IN fig. 4 are all low levels, so that both the first switch unit Q1 and the second switch unit Q2 are turned off, that is, the switch control circuit 202 is turned off at this time, so that + VBAT is not powered at this time, that is, the input terminal of the power-on start post-stage circuit 203 is not powered, and the computer cannot maintain the standby voltage, so that the scheme of the present application does not generate a standby current by the standby voltage when the computer is powered by the energy storage unit and is IN the shutdown state, thereby increasing the standby time of the computer.
When the computer is powered by the energy storage unit and is turned on, a user performs a power-on operation to jump the power switch signal EC _ PWRSW from a low level of a default state to a high level for at least a first time period, and at this time, the first switch unit Q1 and the second switch unit Q2 can both be turned on, so that the standby voltage of the system is normal, that is, the standby voltage is a high level. When the power-on timing control circuit detects that the power switch signal jumps from the low level to the high level in the default state, the power-on timing control circuit may control the main power signal MAINPOWER _ EC to remain at the high level, so that after the first period of time, when the power switch signal EC _ PWRSW returns to the low level, since the main power signal MAINPOWER _ EC has already changed to the high level, the first switch unit Q1 and the second switch unit Q2 are still turned on, and the standby voltage is still at the high level, so that the computer can be normally powered on.
In the present application, the power-on sequence control circuit is not shown in fig. 4, and the power-on sequence control circuit is used to control the power-on sequence. In practical applications, the power-on timing control circuit of the present application may be generally implemented based on an EC chip.
In addition, the power switch signal jumps from the low level to the high level of the default state, and does not immediately change back to the low level, but maintains the high level for at least the first time period, so that the power-on sequence control circuit can successfully detect the condition that the power switch signal jumps from the low level to the high level of the default state, and the stability of the scheme is improved.
The specific switch control circuit 202 in this embodiment of the present application meets the functional requirements of the present application for the switch control circuit 202, and has a simple structure and high reliability.
Further, in the embodiment of fig. 4, the switch control circuit 202 further includes:
a first current limiting resistor R11 provided at the anode of the first diode D1;
a second current limiting resistor R12 provided at the anode of the second diode D2;
and a third current limiting resistor R13 provided at the anode of the third diode D3.
Therefore, the situation that the second switch unit Q2 is damaged due to overcurrent of the branch circuit where the first diode D1 is located, the branch circuit where the second diode D2 is located or the branch circuit where the third diode D3 is located is avoided
Further, in the embodiment of fig. 4, the switch control circuit 202 further includes:
and a first filter capacitor C11 having a first end connected to the second end of the first switching unit Q1 and a second end grounded. Thereby contributing to the improvement of the stability of the output voltage of the switch control circuit 202. Certainly, in practical application, a plurality of filter capacitors may be further provided, so that the equivalent capacitor can conveniently reach a required capacitance value, for example, not only the first filter capacitor C11 but also the second filter capacitor C12 connected in parallel with the first filter capacitor C11 is provided in fig. 4.
When a user performs a power-on operation, the power switch signal EC _ PWRSW is switched from a low level of a default state to a high level and is maintained for at least a first time period, a specific generation circuit of the power switch signal EC _ PWRSW may be set according to actual needs, and considering that in practical applications, a user usually performs the power-on operation through a key and a button, therefore, referring to fig. 5, in a specific embodiment of the present invention, the power switch signal is a power switch signal generated by a key trigger circuit, and the key trigger circuit includes:
the input end is connected with the positive pole of the system main power end of the computer, the output end is connected with the first end of the first capacitor C1, the default state is the automatic rebound key 50 in the off state, and when the automatic rebound key 50 is pressed, the automatic rebound key 50 is switched on;
the second end of the first capacitor C1 is grounded, and an electrical signal of the first end of the first capacitor C1 is used as a power switch signal.
In this embodiment, the key trigger circuit is provided with the first capacitor C1, so that the power switch signal can be maintained for a certain time after jumping from a low level to a high level, that is, at least for a first time period. The specific duration value is influenced by the specific circuit structure and the parameters of each device, and in practical application, the appropriate parameters of each device can be selected through testing and debugging.
Further, in an embodiment of the present invention, the key triggering circuit may further include:
and a fourth resistor R4 with a first end connected with the first end of the first capacitor C1 and a second end grounded.
In this embodiment, the fourth resistor R4 connected in parallel with the first capacitor C1 is provided, so that a discharge loop is provided for the first capacitor C1, which is beneficial to avoiding the situation that the duration of the high level is too long after the power switch signal is switched from the low level to the high level, i.e., the discharge loop provided by the fourth resistor R4, so that the duration of the high level of the power switch signal can be conveniently and flexibly set.
In addition, in the scheme of fig. 5, in order to avoid overcurrent, current limiting resistors R14 and R15 are further arranged in the circuit, so as to improve the stability of the circuit, which can be seen in particular from the circuit structure illustration of fig. 5.
When a user performs a power-on operation, the power switch signal is switched from a low level to a high level in a default state and maintained for at least a first duration. However, in practical applications, the power-on signal usually needs a low level signal, so that the power-on input circuit can convert the power switch signal into the power-on signal required by the computer.
In one embodiment of the present invention, referring to fig. 6, the power-on signal is a power-on signal generated by a power-on input circuit, and the power-on input circuit includes:
a third resistor R3 having a first end receiving a power switching signal and a second end connected to the first end of the second capacitor C2 and the control end of the third switching unit Q3, respectively;
a second capacitor C2 with a second end grounded;
a third switching unit Q3 having a second terminal connected to the ground and a first terminal connected to a second terminal of the first pull-up resistor Rx;
a first pull-up resistor Rx having a first end connected with a preset high level;
the electrical signal of the first end of the third switching unit Q3 is used as a power-on signal of the computer.
When the power switching signal is at a low level, the third switching unit Q3 is turned off, and at this time, the electrical signal at the first end of the third switching unit Q3 is at a high level. When the user performs a power-on operation to make the power switch signal jump to a high level, the third switching unit Q3 is turned on, so that the electrical signal at the first end of the third switching unit Q3 changes from a high level to a low level.
The specific type of the third switching unit Q3 may be set as required, but it is required to select the switching unit that is turned on when the control terminal is at a high level, for example, the NMOS transistor is specifically selected in fig. 6.
The first terminal of the first pull-up resistor Rx is connected to a predetermined high level, and in fig. 6, to a voltage of 3.3V. In addition, in fig. 6, the power switch signal is denoted as EC _ PWRSW, and the power-on signal of the computer is denoted as EC _ PWRSW #.
In addition, in the embodiment of fig. 6, a delay circuit composed of the third resistor R3 and the second capacitor C2 is provided in order to stabilize the standby voltage of the system and then generate the power-on signal, thereby reducing the occurrence of abnormal conditions such as power-on failure.
Further, the capacitance value of the second capacitor C2 and the resistance value of the third resistor R3 both pass t = R 3 C 2 In ((E-V)/E);
wherein t is a preset delay time, E is a voltage of the power switch signal, V is a turn-on voltage of the third switching unit Q3, and R is 3 Is the resistance value of the third resistor R3, C 2 Is the capacitance value of the second capacitor C2.
It can be understood that, by providing the delay circuit formed by the third resistor R3 and the second capacitor C2, the delay time t may be set in advance according to needs, for example, through experiments, the time required for stabilizing the standby voltage after the user starts up is determined, and then the delay time t is set. E is the voltage of the power switch signal, and V is the on-voltage of the third switching unit Q3, which can be known in advance, based on which the resistance of the third resistor R3 and the capacitance of the second capacitor C2 can be set. For example, in one specific case, the resistance value of the third resistor R3 is set to 47K Ω, and the capacitance value of the second capacitor C2 is set to 0.22uF.
By applying the technical scheme provided by the embodiment of the invention, the switch control circuit 202 is arranged between the power-on starting pre-stage circuit 201 and the power-on starting post-stage circuit 203, so that the standing use time of the computer is prolonged. Specifically, the output terminal of the power-on pre-stage circuit 201 serves as the positive terminal of the system power source terminal of the computer, and when the computer is powered by the adapter, the switch control circuit 202 is turned on, so that when the computer is powered by the adapter, the input terminal of the power-on post-stage circuit 203 can be normally powered, that is, the standby voltage can normally exist, so that the computer can be powered on based on the standby voltage after receiving the power-on signal. When the computer is powered by the energy storage unit and is in a shutdown state, the switch control circuit 202 is turned off, and at this time, the input end of the power-on starting post-stage circuit 203 is not powered, so that the standby voltage does not exist, and the problem that the standby voltage consumes the electric energy of the energy storage unit in the traditional scheme can not occur, so that the standing and using time of the computer is effectively prolonged, namely the standing and using time of the computer is prolonged. When the computer is powered by the energy storage unit and the computer is turned on, the switch control circuit 202 may be turned on again, so that the input terminal of the power-on start-up post-stage circuit 203 can be normally powered on at this time, and the standby voltage can normally exist at this time, so that the computer can be turned on based on the standby voltage after receiving the power-on signal. In summary, the scheme of the application can effectively prolong the standing service life of the computer.
Corresponding to the above embodiments of the power-on starting circuit of the computer, an embodiment of the present invention further provides a computer, which may include the power-on starting circuit of the computer in any of the above embodiments. And as can be appreciated from the foregoing description, the computers to which the present application is directed may generally be embodied as notebook computers. Of course, other computers having the same situation can also apply the scheme of the present application to increase the standing time period.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the components and steps of the various examples have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The principle and the implementation of the present invention are explained in the present application by using specific examples, and the above description of the embodiments is only used to help understanding the technical solution and the core idea of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. A power-on start circuit for a computer, comprising:
the method comprises the steps that a power-on starting preceding-stage circuit is powered on, and the output end of the power-on starting preceding-stage circuit is used as the anode of a system total power supply end of a computer;
the input end of the switch control circuit is connected with the output end of the power-on starting preceding-stage circuit, the output end of the switch control circuit is connected with the input end of the power-on starting subsequent-stage circuit, when the computer is powered by an adapter, the switch control circuit is switched on, when the computer is powered by an energy storage unit and is in a power-off state, the switch control circuit is switched off, and when the computer is powered by an energy storage unit and is started, the switch control circuit is switched on;
the power-on starting rear-stage circuit is used for providing standby voltage when the input end of the power-on starting rear-stage circuit is powered on so as to enable the computer to be started based on the standby voltage after receiving a starting signal;
the switch control circuit includes:
a first resistor;
the first switch unit is connected with the first end of the first resistor and used as the input end of the switch control circuit, the second end of the switch control circuit is used as the output end of the switch control circuit, and the control end of the first switch unit is respectively connected with the second end of the first resistor and the first end of the second switch unit;
the second switch unit is connected with the second end of the second resistor, the control end of the second switch unit is connected with the first end of the second resistor, the cathode of the first diode, the cathode of the second diode and the cathode of the third diode;
the second resistor with the second end grounded;
the first diode is connected with the anode of the first diode and a main power supply signal;
the anode of the second diode is connected with a power switch signal;
the third diode with the anode connected with the adapter input signal;
the power-on sequence control circuit is used for controlling the main power supply signal to be kept at a high level when the power supply switch signal is detected to jump from a low level to a high level in a default state;
and, when the computer is powered by an adapter, the adapter input signal is high; when the computer is started, the power switch signal jumps from a low level to a high level in a default state and is maintained for at least a first time length; when the control end of the first switch unit is at a low level, the first switch unit is conducted; when the control end of the second switch unit is at a high level, the second switch unit is turned on.
2. The computer power-on startup circuit of claim 1, wherein the switch control circuit further comprises:
a first current limiting resistor disposed at an anode of the first diode;
the second current limiting resistor is arranged at the anode of the second diode;
and the third current limiting resistor is arranged at the anode of the third diode.
3. The computer power-on startup circuit of claim 1, wherein the switch control circuit further comprises:
and the first end of the first filter capacitor is connected with the second end of the first switch unit, and the second end of the first filter capacitor is grounded.
4. The computer power-on startup circuit of claim 1, wherein the power switch signal is a power switch signal generated by a key trigger circuit, the key trigger circuit comprising:
the input end of the automatic rebounding key is connected with the positive electrode of the system main power supply end of the computer, the output end of the automatic rebounding key is connected with the first end of the first capacitor, the default state is an off state, and when the automatic rebounding key is pressed down, the automatic rebounding key is switched on;
the second end of the first capacitor is grounded, and an electric signal of the first end of the first capacitor is used as the power switch signal.
5. The computer power-on startup circuit of claim 4, wherein the key trigger circuit further comprises:
and the first end of the fourth resistor is connected with the first end of the first capacitor, and the second end of the fourth resistor is grounded.
6. A power-on start circuit for a computer according to any one of claims 1 to 5, wherein the power-on signal is generated by a power-on input circuit, the power-on input circuit comprising:
the first end of the third resistor is connected with the control end of the second capacitor and the control end of the third switching unit;
the second capacitor with the second end grounded;
the third switch unit, the second end of which is grounded and the first end of which is connected with the second end of the first pull-up resistor;
the first pull-up resistor is connected with a preset high level at a first end;
and the electric signal of the first end of the third switch unit is used as the starting signal of the computer.
7. The power-on startup circuit of the computer according to claim 6, wherein the capacitance value of the second capacitor and the resistance value of the third resistor both pass t = R 3 C 2 In ((E-V)/E);
wherein t is a preset delay time, E is the voltage of the power switch signal, V is the turn-on voltage of the third switch unit, and R is 3 Is the resistance value of the third resistor, C 2 Is the capacitance value of the second capacitor.
8. A computer comprising a power-on startup circuit of a computer according to any one of claims 1 to 7.
9. The computer of claim 8, wherein the computer is a notebook computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110327771.1A CN113031739B (en) | 2021-03-26 | 2021-03-26 | Computer and power-on starting circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110327771.1A CN113031739B (en) | 2021-03-26 | 2021-03-26 | Computer and power-on starting circuit thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113031739A CN113031739A (en) | 2021-06-25 |
| CN113031739B true CN113031739B (en) | 2023-02-28 |
Family
ID=76472582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110327771.1A Active CN113031739B (en) | 2021-03-26 | 2021-03-26 | Computer and power-on starting circuit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113031739B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114337222B (en) * | 2021-12-28 | 2024-02-02 | 深圳欧陆通电子股份有限公司 | Control circuit and device for server power supply signal |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103105921A (en) * | 2013-01-30 | 2013-05-15 | 山东超越数控电子有限公司 | Method for reducing lithium battery static power consumption under laptop shutdown state |
| CN107196380A (en) * | 2017-07-18 | 2017-09-22 | 深圳诺欧博智能科技有限公司 | A kind of power management system of robot and robot |
| CN110928392A (en) * | 2019-12-27 | 2020-03-27 | 上海闻泰信息技术有限公司 | Power supply control device and electronic apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016061771A1 (en) * | 2014-10-22 | 2016-04-28 | 华为技术有限公司 | Power-on circuit and electronic device |
| CN108055029B (en) * | 2018-02-01 | 2022-02-22 | 青岛海信智能商用系统股份有限公司 | Switching circuit and electronic equipment with same |
-
2021
- 2021-03-26 CN CN202110327771.1A patent/CN113031739B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103105921A (en) * | 2013-01-30 | 2013-05-15 | 山东超越数控电子有限公司 | Method for reducing lithium battery static power consumption under laptop shutdown state |
| CN107196380A (en) * | 2017-07-18 | 2017-09-22 | 深圳诺欧博智能科技有限公司 | A kind of power management system of robot and robot |
| CN110928392A (en) * | 2019-12-27 | 2020-03-27 | 上海闻泰信息技术有限公司 | Power supply control device and electronic apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113031739A (en) | 2021-06-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113031739B (en) | Computer and power-on starting circuit thereof | |
| CN112886664A (en) | Electronic device | |
| CN106328179B (en) | Power supply circuit and power supply method | |
| CN114089714A (en) | Portable electronic device | |
| CN113541454A (en) | Switching power supply control circuit, and control method and device of switching power supply | |
| CN210639587U (en) | Power-off fast discharge circuit of switching Power supply, server mainboard and server | |
| CN117293972A (en) | Protection circuit for preventing battery equipment from overdischarging | |
| CN217467616U (en) | Power supply control circuit and electronic device | |
| CN216851930U (en) | Starting circuit and electronic equipment | |
| CN113676166B (en) | Battery low-voltage automatic cut-off circuit and working method thereof | |
| CN112600283B (en) | Startup and shutdown circuit | |
| CN112165246B (en) | Power supply chip self-restarting device, method and system | |
| CN115328694A (en) | Equipment short-time power failure recovery circuit, electronic equipment and power failure recovery method of electronic equipment | |
| CN201497947U (en) | Power management circuit with embedded chip | |
| CN210924256U (en) | Battery starting circuit | |
| CN212541261U (en) | Shutdown reset circuit and electronic equipment | |
| CN210609098U (en) | NB-IoT communication module starting circuit, circuit board and Internet of things terminal | |
| CN112799496A (en) | Zero-power-consumption standby control device, method and system for computer | |
| CN102566724A (en) | Server restart circuit | |
| CN111030287A (en) | UPS uninterrupted power source system | |
| CN217133576U (en) | Startup and shutdown circuit and equipment | |
| CN216561698U (en) | Switching on and shutting down circuit and electronic equipment | |
| CN217957051U (en) | Charging detection reset circuit and electronic equipment | |
| CN110571773A (en) | Protective circuit | |
| CN221202201U (en) | Protection circuit for preventing battery equipment from overdischarging |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |