CN216565098U - Power-on starting circuit and electrical equipment - Google Patents
Power-on starting circuit and electrical equipment Download PDFInfo
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- CN216565098U CN216565098U CN202122480699.4U CN202122480699U CN216565098U CN 216565098 U CN216565098 U CN 216565098U CN 202122480699 U CN202122480699 U CN 202122480699U CN 216565098 U CN216565098 U CN 216565098U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model is used in the technical field of electrical equipment, and provides a power-on starting circuit and electrical equipment, wherein the circuit comprises a power supply module, a power supply module and a power supply module, wherein the power supply module is used for outputting a voltage signal; the switch module comprises a switch and a switch assembly, one end of the switch is connected with the output end of the power supply module, the other end of the switch is connected with the first connecting end of the switch assembly, and the second connecting end of the switch assembly is connected with the load end; the power-on control module comprises a first resistor, a second resistor, a first capacitor, a first triode and a first switch element; and the on-off control module is connected with the control end and the load end of the switch assembly and is used for controlling the switch assembly to be in a conducting state or a switching-off state according to the electric signal of the load end. The utility model can realize the system closing even if the switch is pressed for a long time when the system automatically stops working, thereby achieving the effect of low quiescent current and the effect that the system can respond to both low quiescent current and quick switch.
Description
Technical Field
The utility model belongs to the technical field of electrical equipment, and particularly relates to a power-on starting circuit and electrical equipment.
Background
Along with the continuous development of society, the types of electronic products are more and more abundant, so that the life of people is greatly facilitated, and the life quality of people is improved. Many existing electronic products are provided with a key starting circuit, and a user can press a power-on and power-off key of the key starting circuit to realize the power-on and power-off functions of the product.
In general, when a system of a product stops working, a long-time pressing of a power on/off button cannot turn off a system circuit of the product, and cannot achieve low quiescent current, and although a part of products can achieve low quiescent current, the system cannot be turned on again quickly after the system is turned off.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a power-on starting circuit, aiming at solving the problem that the conventional key starting circuit cannot realize both low quiescent current and quick switching.
An embodiment of the present invention provides a power-on start circuit, including:
the power supply module is used for outputting a voltage signal;
the switch module comprises a switch and a switch assembly, one end of the switch is connected with the output end of the power supply module, the other end of the switch is connected with the first connecting end of the switch assembly, and the second connecting end of the switch assembly is connected with the load end;
the power-on control module comprises a first resistor, a second resistor, a first capacitor, a first triode and a first switching element, wherein the other end of the switch is connected with a first pole pin of the first switching element sequentially through the first resistor and the first capacitor, the other end of the switch is grounded through the second resistor, a base electrode of the first triode is connected with one end, far away from the ground, of the second resistor, an emitting electrode of the first triode is connected with a circuit between the first resistor and the first capacitor, a collecting electrode of the first triode is connected with the first pole pin of the first switching element, a second pole pin of the first switching element is connected with a control end of the switching component, and a third pole pin of the first switching element is grounded;
and the on-off control module is connected with the control end and the load end of the switch assembly and is used for controlling the switch assembly to be in a conducting state or a switching-off state according to the electric signal of the load end.
Optionally, the on-off control module includes a main control chip, a second switch element, a third resistor and a fourth resistor;
the main control chip comprises a signal input end and a signal output end, the signal input end is connected with the load end, and the signal output end is connected with one end of the third resistor;
the other end of the third resistor is connected with the first pole tube foot of the second switching element and one end of the fourth resistor;
a second pole pin of the second switching element is grounded, and a third pole pin of the second switching element is connected with the control end of the switch assembly;
the other end of the fourth resistor is connected to a second stage pin of the second switching element.
Optionally, the power-up control module includes a second switching element, a third resistor, a fourth resistor, and a first capacitor;
a first pole pin of the second switching element is connected with one end of the third resistor and the other end of the switch, a second pole pin of the second switching element is connected with one end of the first capacitor and one end of the fourth resistor, and a third pole pin of the third switching element is connected with the other end of the first capacitor and the first pole pin of the third switching element;
a second pole pin of the third switching element is connected with the control end of the switch component, and a third pole pin of the third switching element is grounded;
the other end of the third resistor is grounded;
the other end of the fourth resistor is connected with the other end of the switch.
Optionally, the switch module further comprises a fifth resistor and a sixth resistor;
one end of the fifth resistor is connected with the first connecting end of the switch assembly, and the other end of the fifth resistor is connected with the control end of the switch assembly;
and the control end of the switch assembly is connected with the power-on control module and the on-off control module through a sixth resistor.
Optionally, the switch module further includes a third switch element, a seventh resistor, and a first voltage regulator tube;
and a first pole pin of the third switching element is connected with one end of the seventh resistor and the cathode of the first voltage regulator tube, a second pole pin of the third switching element is connected with the load end, and a third pole pin of the third switching element is connected with the other end of the seventh resistor and the second connecting end of the switching assembly.
Optionally, the switch module further includes an eighth resistor, one end of the eighth resistor is connected to the second connection end of the switch assembly, and the other end of the eighth resistor is connected to the third pin of the third switching element.
Optionally, the switch module further comprises a second voltage regulator tube;
the anode of the second voltage-stabilizing tube is connected with the control end of the switch component, and the cathode of the second voltage-stabilizing tube is connected with the other end of the switch.
Optionally, the switch module further comprises a second capacitor;
one end of the second capacitor is connected with the control end of the switch assembly, and the other end of the second capacitor is connected with the first connecting end of the switch assembly.
Optionally, the switching component includes any one of a triode, a MOS transistor, and an IGBT.
In a second aspect, the present application further provides an electrical apparatus, which includes the above power-on start circuit.
According to the embodiment of the utility model, the power supply module and the load end are connected through the switch and the switch assembly of the switch module, the control end of the switch assembly is also connected with the power supply control module and the on-off control module, and the on-off control module can control the switch assembly to be maintained in an on-state or an off-state according to an electric signal of the load end, so that the system can be turned off even if the switch is pressed for a long time when the system stops working, and the effect of low quiescent current is achieved; the first capacitor of the power-on control module is charged at the moment when the switch is switched on so as to output a pulse signal to switch on the first switch element, so that the switch component is controlled to be switched on, the power supply module and the load end are controlled to be switched on, the system can be switched on again by quickly pressing the switch after the system is powered down, and the effects of low quiescent current and quick switching can be achieved.
Drawings
Fig. 1 is a schematic circuit structure diagram of an embodiment of a power-on startup circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit structure diagram of another embodiment of a power-on startup circuit according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
The existing power-on starting circuit can not realize both low quiescent current and quick switching function. The utility model can achieve the effects of low quiescent current and quick switching.
Example one
In some alternative embodiments, as shown in fig. 1, an embodiment of the present application provides a power-on start circuit, which includes a power supply module 100, a switch module 200, a power-on control module 300, and an on-off control module 400.
The power supply module 100 is configured to output a voltage signal;
the switch module 200 comprises a switch K1 and a switch component QS, one end of the switch K1 is connected with the output end of the power supply module 100, the other end of the switch K1 is connected with a first connection end of the switch component QS, and a second connection end of the switch component QS is connected with a load end VOUT;
the power-on control module 300 includes a first resistor R1, a second resistor R2, a first capacitor C1, a first triode Q1 and a first switching element Q2, the other end of the switch K1 is connected to the first pole pin of the first switching element Q2 sequentially through the first resistor R1 and the first capacitor C1, the other end of the switch K1 is further grounded through the second resistor R2, the base of the first triode Q1 is connected to one end of the second resistor R2, which is far from the ground, the emitter of the first triode Q1 is connected to a line between the first resistor R1 and the first capacitor C1, the collector of the first triode Q1 is connected to the first pole pin of the first switching element Q2, the second pole pin of the first switching element Q2 is connected to the control end of the switching assembly, and the third pole pin of the first switching element Q2 is grounded;
the on-off control module 400 is connected to the control end of the switch assembly QS and the load end VOUT, and is configured to control the switch assembly QS to be in an on state or an off state according to an electrical signal of the load end VOUT.
The power supply module 100 may employ a battery, a switching power supply, or other power supply or power supply circuit capable of outputting a stable voltage signal, which is not limited in this respect.
The output end of the power supply module 100 is connected to one end of a switch K1, the switch K1 is a switch key of a product, such as a power-on key of an electronic product such as a computer, a mobile phone, or a tablet computer, the switch K1 includes an on state and an off state, and at the same time, the switch K1 can only be in one of the on state and the off state, for example, the switch K1 is in the on state, and when the switch K1 is pressed, the switch K1 is in the off state.
The other end of the switch K1 is connected to a first connection end of a switch component QS, when the switch component QS is implemented, the switch component QS includes a first connection end, a second connection end and a control end, wherein the second connection end of the switch component QS is connected to a load end VOUT, the load end VOUT is used for connecting a product load, the control end of the switch component QS is connected to the power-on control module 300 and the power-on control module 400, optionally, the switch component QS may adopt a triode, an MOS transistor or an IGBT, the first connection end, the second connection end and the control end of the switch component QS respectively correspond to an emitter, a collector and a base of the triode, for example, when the switch component QS is a triode, the first connection end, the second connection end and the control end of the switch component QS respectively correspond to a source of the MOS transistor, and when the switch component QS is a MOS transistor, the first connection end, the second connection end and the control end of the switch component QS respectively correspond to a source of the MOS transistor, A drain and a gate. The first switching element Q2 in the present application and the second and third switching elements in the following are the same as the switching assembly QS.
The first resistor R1 of the power-on control module 300 is connected to the other end of the switch K1, when the switch K1 is turned on, the power supply module 100 charges the first capacitor C1 through the first resistor R1, and a pulse signal is generated in a charging process of the first capacitor C1 to the first switch element Q2, so that the first switch element Q2 is turned on, and the switch component QS is turned on, for example, the switch component QS adopts a MOS transistor, wherein a first connection end and a control end of the switch component QS are respectively a source and a gate of the MOS transistor, when a gate-source voltage of the MOS transistor reaches a conduction voltage of the MOS transistor, the switch component QS can be turned on, so that a voltage signal output by the power supply module 100 is transmitted to the load terminal VOUT, and the on-off control module 400 controls the switch component QS to be maintained in a conduction state to power on the system when detecting that the load terminal VOUT has an electrical signal.
Alternatively, the on-off control module 400 may be a single chip or a circuit or a component capable of controlling the switch assembly QS to maintain an on state or an off state according to an electrical signal of the load terminal VOUT, where the electrical signal may be a voltage signal or a current signal. For example, taking the on-off control module 400 as a single chip, at the moment when the switch element QS is turned on, the single chip detects that the load terminal VOUT has a voltage signal, and then the single chip outputs a signal to the control terminal of the switch element QS to maintain the switch element QS to be continuously turned on, so as to maintain the system to be powered on.
When the switch K1 is turned off, the power supply module 100 is disconnected from the load terminal VOUT, the load terminal VOUT has no voltage, and when the on-off control module 400 detects that the load terminal VOUT has no electrical signal, the control switch assembly QS is in an off state, and the system is turned off when power is cut off. Under the normal operation state, if the system detects that the protection states such as undervoltage, overtemperature, overcurrent and the like need to be shut down, the switch component QS can be closed through the on-off control module 400, so that the system can be closed even if a switch (a switch K1) is pressed for a long time, and the effect of low quiescent current is achieved. When the system is turned off (the switch K1 is turned off), the first capacitor C1 has electric quantity, the first triode Q1 is turned on by dividing voltage through the first resistor R1 and the second resistor R2, the first capacitor C1 and the first triode Q1 form a loop, the first capacitor C1 is rapidly discharged, the circuit is rapidly restored to the initial state, and the system is rapidly powered on next time the switch K1 is turned on.
In the embodiment of the application, the power supply module 100 and the load end VOUT are connected through the switch K1 and the switch component QS of the switch module 200, the control end of the switch component QS is further connected with the upper electric control module 300 and the on-off control module 400, the on-off control module 400 can control the switch component QS to be maintained in an on state or an off state according to an electric signal of the load end VOUT, and the system can be turned off even if the switch is pressed for a long time when the system automatically stops working, so that an effect of low quiescent current is achieved; the first capacitor C1 of the power-on control module 300 is charged at the instant when the switch K1 is turned on to generate a pulse signal to turn on the first switching element Q2, so as to control the on state of the switching element QS, further control the on state between the power supply module 100 and the load terminal VOUT, and implement the characteristics of single pulse output and fast reset of the system power-on and power-on control module 300, which can achieve the effects of low quiescent current and fast system response.
Example two
In some alternative embodiments, as shown in fig. 2, the on-off control module 400 includes a main control chip U1, a second switching element Q3, a third resistor R3, and a fourth resistor R4;
the main control chip U1 includes a signal input terminal Vin and a signal output terminal Vout, the signal input terminal Vin is connected with the load terminal Vout to obtain an electrical signal of the load terminal Vout, and the signal output terminal Vout is connected with one end of the third resistor R3;
the other end of the third resistor R3 is connected to the first pole leg of the second switching element Q3 and one end of the fourth resistor R4;
a second pole pin of the second switching element Q3 is grounded, and a third pole pin of the second switching element Q3 is connected with a control terminal of the switching assembly QS;
the other end of the fourth resistor R4 is connected to the second stage pin of the second switching element Q2.
Further, the switch module 200 further includes a fifth resistor R5 and a sixth resistor R6;
one end of the fifth resistor R5 is connected with a first connection end of the switch component QS, and the other end of the fifth resistor R5 is connected with a control end of the switch component QS;
a control terminal of the switch assembly QS is connected to the power-on control module 300 and the on-off control module 400 through a sixth resistor R6.
In an implementation, one end of the sixth resistor R6 is connected to the control end of the switch element QS, the other end of the sixth resistor R6 is connected to the second pole pin of the first switch element Q2, and the other end of the sixth resistor R6 is further connected to the third pole pin of the second switch element Q3. Alternatively, for example, the first switching element Q2 is an NMOS transistor, and the second switching element Q3 is an NPN transistor, the gate of the first switching element Q2 is connected to the collector of the first transistor Q1, the source of the first switching element Q2 is connected to the other end of the sixth resistor R6, the drain of the first switching element Q2 is grounded, the base of the second switching element Q3 is connected to the other end of the third resistor R3, the emitter of the second switching element Q3 is grounded, and the collector of the second switching element Q3 is connected to the other end of the sixth resistor R6.
When the switch K1 is turned on, the power supply module 100 charges the first capacitor C1, and a pulse signal is generated during the charging process of the first capacitor C1, so that the gate of the first switch element Q2 has an instantaneous high level, and the first switch element Q2 is turned on, at this time, the power supply module 100, the fifth resistor R5, the sixth resistor R6 and the first switch element Q2 form a loop, the voltage of the fifth resistor R5 and the sixth resistor R6 is divided to turn on the switch element QS, the power supply module 100 outputs a voltage signal to the load terminal VOUT, and the system is successfully powered on. After the main control chip U1 detects that the load terminal VOUT has a voltage signal through the signal input terminal Vin, the main control chip U1 outputs a high level to the first pole of the second switch element Q3 through the signal output terminal VOUT to turn on the second switch element Q3, at this time, the power supply module 100, the fifth resistor R5, the sixth resistor R6, and the second switch element Q3 form a loop, so that the switch element QS is locked in a conducting state by voltage division of the fifth resistor R5 and the sixth resistor R6, and the power supply module 100 keeps outputting the voltage signal through the load terminal VOUT to maintain the system powered on.
When the switch K1 is turned off, the voltage at the other end of the switch K1 drops instantaneously, and the system is turned off. Under a normal operation state, if the system detects that protection states such as undervoltage, overtemperature and overcurrent need to be shut down, the switch component QS can be closed through the on-off control module 400, so that the system can be closed even if a switch (a switch K1) is pressed for a long time, and the effect of low quiescent current is achieved. When the switch K1 is turned off, the first capacitor C1 has power, and the first capacitor C1 discharges quickly through the first transistor Q1, so that the circuit is restored to the initial state quickly, and the system is powered on quickly when the switch K1 is turned on next time.
EXAMPLE III
In some alternative embodiments, the switch module 200 further includes a third switching element Q4, a seventh resistor R7, and a first voltage regulator D1;
a first pole pin of the third switching element Q4 is connected to one end of the seventh resistor R7 and the cathode of the first regulator D1, a second pole pin of the third switching element Q4 is connected to the load terminal VOUT, and a third pole pin of the third switching element Q4 is connected to the other end of the seventh resistor R7 and the second connection terminal of the switching element QS.
In implementation, the third switching element Q4 may be any one of a triode, a MOS transistor and an IGBT, taking the third switching element Q4 as an NPN triode as an example, the base of the third switching element Q4 is connected to the cathode of the first voltage regulator D1, the emitter of the third switching element Q4 is connected to the load terminal VOUT, the collector of the third switching element Q4 is connected to the second connection terminal of the switching component QS, and in implementation, the third switching element Q4, the seventh resistor R7 and the first voltage regulator D1 form a voltage regulator circuit, which plays a role in stabilizing voltage and improving circuit reliability.
In some alternative embodiments, the switch module 200 further includes an eighth resistor R8, one end of the eighth resistor R8 is connected to the second connection terminal of the switch element QS, and the other end of the eighth resistor R8 is connected to the third pin of the third switch element Q4. The eighth resistor R8 can perform a voltage dividing function, and reduce the voltage of the third switching element Q4, thereby reducing the heat generation of the third switching element Q4, avoiding damage to the third switching element Q4, and prolonging the service life of the component.
In some alternative embodiments, the switch module 200 further includes a second regulator tube D2;
the anode of the second regulator D2 is connected to the control end of the switch component QS, and the cathode of the second regulator D2 is connected to the other end of the switch K1.
In implementation, two ends of the second voltage regulator D2 are respectively connected to the control end and the first connection end of the switch component QS, so as to effectively stabilize the voltage output by the power supply module 100, and optionally, the switch module 200 further includes a second capacitor C2;
one end of the second capacitor C2 is connected to the control end of the switch element QS, and the other end of the second capacitor C2 is connected to the first connection end of the switch element QS. In implementation, the second capacitor C2 is connected in parallel with the second voltage regulator D2, and can filter the voltage signal output by the power supply module 100, thereby improving the stability and reliability of the circuit.
Example four
In some optional embodiments, the present application further provides an electrical apparatus, including the power-on start circuit as described above.
In implementation, the power-on starting circuit includes a power supply module 100, a switch module 200, a power-on control module 300 and an on-off control module 400, where the power supply module 100 is configured to output a voltage signal; the switch module 200 comprises a switch K1 and a switch component QS, one end of the switch K1 is connected with the output end of the power supply module 100, the other end of the switch K1 is connected with a first connection end of the switch component QS, and a second connection end of the switch component QS is connected with a load end VOUT; the power-on control module 300 includes a first resistor R1, a second resistor R2, a first capacitor C1, a first triode Q1 and a first switching element Q2, the other end of the switch K1 is connected to the first pole pin of the first switching element Q2 through the first resistor R1 and the first capacitor C1 in sequence, the other end of the switch K1 is further grounded through the second resistor R2, the base of the first triode Q1 is connected to the end of the second resistor R2 far from the ground, the emitter of the first triode Q1 is connected to the line between the first resistor R1 and the first capacitor C1, the collector of the first triode Q1 is connected to the first pole pin of the first switching element Q2, the second pole pin of the first switching element Q2 is connected to the control end of the switching assembly, and the third pole pin of the first switching element Q2 is grounded; the on-off control module 400 is connected to a control end of the switch assembly QS and the load end VOUT, and is configured to control the switch assembly QS to be in an on state or an off state according to an electrical signal of the load end VOUT.
Alternatively, the power supply module 100 may employ a battery, a switching power supply, or other power supply or power supply circuit capable of outputting a stable voltage signal, which is not limited in this respect.
The output end of the power supply module 100 is connected to one end of a switch K1, the switch K1 is a switch button of an electrical apparatus, the electrical apparatus includes but is not limited to a computer, a mobile phone, a tablet computer, an e-reader, and other electronic products, and the specific type of the electrical apparatus is not limited herein. Switch K1 includes an on state and an off state, and at the same time, switch K1 can only be in one of an on state and an off state, e.g., switch K1 is in the on state, and when switch K1 is pressed, switch K1 jumps to the off state.
The other end of the switch K1 is connected to a first connection end of a switch component QS, when the switch component QS includes a first connection end, a second connection end and a control end, wherein the second connection end of the switch component QS is connected to a load end VOUT, the load end VOUT is used for connecting a product load, the product load may be a functional load element or an equipment circuit component of an electrical equipment, such as a host of a computer, a hardware system of a mobile phone, and the like, the control end of the switch component QS is connected to the power-on control module 300 and the power-on/off control module 400, optionally, the switch component QS may be a triode, an MOS tube or an IGBT, the first connection end, the second connection end and the control end of the switch component QS respectively correspond to three pins of the triode, the MOS tube or the IGBT, for example, when the switch component QS is a triode, the first connection end, the second connection end and the control end of the switch component QS respectively correspond to an emitter of the triode, the first connection end, the second connection end and the control end of the switch component QS respectively, When the switch component QS is an MOS tube, a first connecting end, a second connecting end and a control end of the switch component QS respectively correspond to a source electrode, a drain electrode and a grid electrode of the MOS tube.
The first resistor R1 of the power-on control module 300 is connected to the other end of the switch K1, when the switch K1 is turned on, the power supply module 100 charges the first capacitor C1 through the first resistor R1, and a pulse signal is generated in a charging process of the first capacitor C1 to the first switch element Q2, so that the first switch element Q2 is turned on, and the switch assembly QS is turned on, for example, an electrical apparatus is a desktop computer, which includes hardware devices such as a host, a display, a mouse, and a keyboard, the power-on start circuit provided in the present application is disposed in the host, wherein the switch K1 is a power-on key of the host, when the power-on key is pressed by a user in a power-off state of the desktop computer, the switch K1 is turned on, the power supply module 100 charges the first capacitor C1 through the first resistor R1, and a charging process of the first capacitor C1 generates a pulse signal to the first switch element Q2, the first switch element Q2 is turned on, and the switch element QS is turned on, so that the voltage signal output by the power supply module 100 is transmitted to the load terminal VOUT, which may be a voltage input terminal of an internal circuit of the host, so that the computer system is powered on and started, and meanwhile, when the on-off control module 400 detects that the voltage signal is present at the load terminal VOUT, the switch element QS is controlled to be maintained in a conducting state to continuously power on the system, thereby achieving a function of quickly turning on the system.
When the electrical equipment is in a power-on working state, when a user presses the power-on/off key again to disconnect the switch K1, the connection between the power supply module 100 and the load terminal VOUT is disconnected, the load terminal VOUT has no voltage, and when the on-off control module 400 detects that the load terminal VOUT has no voltage signal, the switch component QS is controlled to be in a power-off state, and the system is powered off and closed. Under the normal operation state, if the system detects that the protection states such as undervoltage, overtemperature, overcurrent and the like need to be shut down, the switch component QS can be closed through the on-off control module 400, so that the system can be closed even if a switch (a switch K1) is pressed for a long time, and the effect of low quiescent current is achieved. When the system is closed, the first capacitor C1 has electric quantity, the first triode Q1 is turned on by dividing the voltage through the first resistor R1 and the second resistor R2, the first capacitor C1 and the first triode Q1 form a loop, the first capacitor C1 is rapidly discharged, the circuit is rapidly restored to the initial state, and the system is rapidly powered on next time when the switch K1 is turned on.
In the embodiment of the application, the power supply module 100 and the load end VOUT are connected through the switch K1 and the switch component QS of the switch module 200, the control end of the switch component QS is further connected with the upper electric control module 300 and the on-off control module 400, the on-off control module 400 can control the switch component QS to be maintained in an on state or an off state according to an electric signal of the load end VOUT, and the system can be turned off even if the switch is pressed for a long time when the system automatically stops working, so that an effect of low quiescent current is achieved; the first capacitor C1 of the power-on control module 300 is charged at the instant when the switch K1 is turned on to generate a pulse signal to turn on the first switch element Q2, so as to control the turn on of the switch component QS, further control the turn on between the power supply module 100 and the load terminal VOUT, and implement the characteristics of single pulse output and fast reset of the system power-on and power-on control module 300, which can achieve the effects of low quiescent current and fast response of the system.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A power-on startup circuit, comprising:
the power supply module is used for outputting a voltage signal;
the power supply module comprises a power supply module, a switch module and a control module, wherein the power supply module is connected with the power supply module through a first connecting end of the power supply module;
the power-on control module comprises a first resistor, a second resistor, a first capacitor, a first triode and a first switching element, wherein the other end of the switch is connected with a first pole pin of the first switching element sequentially through the first resistor and the first capacitor, the other end of the switch is grounded through the second resistor, a base electrode of the first triode is connected with one end, far away from the ground, of the second resistor, an emitting electrode of the first triode is connected with a circuit between the first resistor and the first capacitor, a collecting electrode of the first triode is connected with the first pole pin of the first switching element, a second pole pin of the first switching element is connected with a control end of the switching component, and a third pole pin of the first switching element is grounded;
and the on-off control module is connected with the control end of the switch assembly and the load end and is used for controlling the switch assembly to be in a conducting state or a switching-off state according to the electric signal of the load end.
2. The power-on startup circuit of claim 1, wherein the on-off control module comprises a main control chip, a second switching element, a third resistor and a fourth resistor;
the main control chip comprises a signal input end and a signal output end, the signal input end is connected with the load end, and the signal output end is connected with one end of the third resistor;
the other end of the third resistor is connected with the first pole tube foot of the second switching element and one end of the fourth resistor;
a second pole pin of the second switching element is grounded, and a third pole pin of the second switching element is connected with the control end of the switch assembly;
the other end of the fourth resistor is connected to a second pole pin of the second switching element.
3. The power-on startup circuit of claim 1, wherein the switch module further comprises a fifth resistor and a sixth resistor;
one end of the fifth resistor is connected with the first connecting end of the switch assembly, and the other end of the fifth resistor is connected with the control end of the switch assembly;
and the control end of the switch assembly is connected with the power-on control module and the on-off control module through the sixth resistor.
4. The power-on startup circuit of claim 3, wherein the switch module further comprises a third switching element, a seventh resistor, and a first voltage regulator tube;
a first pole pin of the third switching element is connected with one end of the seventh resistor and the cathode of the first voltage regulator tube, a second pole pin of the third switching element is connected with the load end, and a third pole pin of the third switching element is connected with the other end of the seventh resistor and the second connecting end of the switch assembly.
5. The power-on startup circuit according to claim 4, wherein the switch module further comprises an eighth resistor, one end of the eighth resistor is connected to the second connection terminal of the switch assembly, and the other end of the eighth resistor is connected to the third pin of the third switching element.
6. The power-on startup circuit of claim 3, wherein the switch module further comprises a second voltage regulator tube;
and the anode of the second voltage-stabilizing tube is connected with the control end of the switch assembly, and the cathode of the second voltage-stabilizing tube is connected with the other end of the switch.
7. The power-on startup circuit of claim 3, wherein the switch module further comprises a second capacitor;
one end of the second capacitor is connected with the control end of the switch assembly, and the other end of the second capacitor is connected with the first connecting end of the switch assembly.
8. The power-on startup circuit according to any one of claims 1 to 7, characterized in that the switching component comprises any one of a triode, a MOS tube and an IGBT.
9. An electrical apparatus, characterized in that it comprises a power-on startup circuit according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122480699.4U CN216565098U (en) | 2021-10-14 | 2021-10-14 | Power-on starting circuit and electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122480699.4U CN216565098U (en) | 2021-10-14 | 2021-10-14 | Power-on starting circuit and electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216565098U true CN216565098U (en) | 2022-05-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122480699.4U Active CN216565098U (en) | 2021-10-14 | 2021-10-14 | Power-on starting circuit and electrical equipment |
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| Country | Link |
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| CN (1) | CN216565098U (en) |
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2021
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