CN215528982U - Power switch circuit capable of realizing power-on starting - Google Patents
Power switch circuit capable of realizing power-on starting Download PDFInfo
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- CN215528982U CN215528982U CN202121356387.6U CN202121356387U CN215528982U CN 215528982 U CN215528982 U CN 215528982U CN 202121356387 U CN202121356387 U CN 202121356387U CN 215528982 U CN215528982 U CN 215528982U
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Abstract
The utility model discloses a power switch circuit capable of realizing power-on starting, which comprises a power supply, an MOS (metal oxide semiconductor) tube, a main control chip, a power-on reset circuit, a triode, a first resistor, a second resistor, a first capacitor, a third resistor, a fourth resistor and a fifth resistor. The voltage output end of the power supply is simultaneously connected with one end of the first capacitor, one end of the first resistor and the source electrode of the MOS tube, the other end of the first capacitor is simultaneously connected with the other end of the first resistor, one end of the second resistor and the grid electrode of the MOS tube, and the drain electrode of the MOS tube is used for being connected with the power supply end of the electronic equipment. The other end of the second resistor is simultaneously connected with one end of a third resistor, the collector of the triode and the reset signal output end of the power-on reset circuit, and the other end of the third resistor is connected with the power supply input end of the power-on reset circuit. And the base electrode of the triode is simultaneously connected with one end of the fourth resistor and one end of the fifth resistor. The application realizes that the electronic equipment can be directly started up when being powered on, and improves the convenience of equipment use.
Description
Technical Field
The utility model relates to the field of switch circuit design, in particular to a power switch circuit capable of realizing power-on startup.
Background
Nowadays, people have electronic equipment everywhere in their lives. Management and control of electronic devices is also becoming increasingly important. Most of electronic devices in life can be started only by pressing a corresponding power key after being powered on, and the electronic devices are inconvenient to use. Moreover, especially for electronic devices such as refrigerators and exhaust fans, it is very important to have a power-on function, otherwise, inconvenience is brought to the life of people.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: the power switch circuit capable of realizing power-on and power-on is provided, so that the power switch circuit can realize the power-on and power-on functions of electronic equipment and improve the use convenience of the electronic equipment.
In order to solve the technical problems, the utility model adopts the technical scheme that:
a power switch circuit capable of realizing power-on starting comprises a power supply, an MOS (metal oxide semiconductor) tube, a main control chip, a power-on reset circuit, a triode, a first resistor, a second resistor, a first capacitor, a third resistor, a fourth resistor and a fifth resistor;
the voltage output end of the power supply is simultaneously connected with one end of the first capacitor, one end of the first resistor and the source electrode of the MOS tube, the other end of the first capacitor is simultaneously connected with the other end of the first resistor, one end of the second resistor and the grid electrode of the MOS tube, and the drain electrode of the MOS tube is used for connecting the power supply end of the electronic equipment;
the other end of the second resistor is simultaneously connected with one end of a third resistor, a collector of the triode and a reset signal output end of the power-on reset circuit, and the other end of the third resistor is connected with a power supply input end of the power-on reset circuit;
the base electrode of the triode is simultaneously connected with one end of the fourth resistor and one end of the fifth resistor, and the other end of the fourth resistor is connected with a first serial input/output pin of the main control chip;
the emitting electrode of the triode and the other end of the fifth resistor are both grounded, the MOS tube is a P-channel MOS tube, and the triode is an NPN-type triode.
Further, the power-on reset circuit comprises a reset chip, a sixth resistor, a seventh resistor and a second capacitor;
one end of the sixth resistor is a power supply input end of the power-on reset circuit, the other end of the sixth resistor is simultaneously connected with one end of the seventh resistor and a power supply input end of the reset chip, the other end of the seventh resistor is simultaneously connected with one end of the second capacitor and a manual reset end of the reset chip, and a reset signal output end of the reset chip is a reset signal output end of the power-on reset circuit;
and the grounding end of the reset chip and the other end of the second capacitor are grounded.
Further, the circuit also comprises a switching piece and a first diode;
the negative electrode of the first diode is grounded through the switch piece, and the positive electrode of the first diode is connected with one end of the second resistor, which is connected with the third resistor.
Further, the device also comprises a second diode, an eighth resistor and an external power supply;
the negative electrode of the second diode is connected with the negative electrode of the first diode, the positive electrode of the second diode is simultaneously connected with one end of the eighth resistor and the second serial input/output pin of the main control chip, the other end of the eighth resistor is connected with the external power supply, and the switch element is a light-touch switch.
Further, the device also comprises a third capacitor and a bidirectional transient suppression diode;
one end of the third capacitor and the first positive electrode of the bidirectional transient suppression diode are connected with the negative electrode of the first diode, and the other end of the third capacitor and the second positive electrode of the bidirectional transient suppression diode are grounded.
Further, the power supply comprises a power interface, a common-mode filter, a ninth resistor, a tenth resistor and a fourth capacitor;
a voltage output end of the power supply interface is simultaneously connected with a first pin of a first coil on the common mode filter and one end of the ninth resistor, and a second pin of the first coil on the common mode filter is simultaneously connected with the other end of the ninth resistor and one end of the fourth capacitor;
the ground terminal of the power supply interface, the two ends of the tenth resistor, the other end of the fourth capacitor, and the first pin and the second pin of the second coil on the common mode filter are all grounded, and the joint of the second pin of the first coil on the common mode filter and the fourth capacitor is the voltage output end of the power supply.
Further, a fifth capacitor and a transient suppression diode are also included;
one end of the fifth capacitor and the cathode of the transient suppression diode are both connected with the voltage output end of the power supply, and the other end of the fifth capacitor and the anode of the transient suppression diode are both grounded.
Further, a third diode is also included;
and the voltage output end of the power supply is connected with the anode of the third diode, and the cathode of the third diode is simultaneously connected with one end of the first capacitor, one end of the first resistor and the source electrode of the MOS tube.
Further, the circuit also comprises a fourth diode, a sixth capacitor and a fifth diode;
one end of the second resistor, which is far away from the first resistor, is connected with the fourth diode through positive connection and is simultaneously connected with the collector of the triode and one end of the sixth capacitor, one end of the second resistor, which is far away from the first resistor, is connected with the reset signal output end of the power-on reset circuit through positive connection with the fifth diode, and the other end of the sixth capacitor is grounded.
Further, the power-on reset circuit further comprises a seventh capacitor, an eighth capacitor and an eleventh resistor;
one end of the seventh capacitor and one end of the eleventh resistor are both connected with the power input end of the reset chip, and one end of the eighth capacitor is connected with the reset signal output end of the reset chip;
the other end of the seventh capacitor, the other end of the eighth capacitor and the other end of the eleventh resistor are all grounded.
In conclusion, the beneficial effects of the utility model are as follows: when the electronic equipment is powered on, the electrical position of a second resistor connected to the grid of the MOS tube is low by utilizing a reset signal generated by a power-on reset circuit, so that the MOS tube is conducted; the power supply supplies power to the electronic equipment, namely the electronic equipment is started; and after the reset signal is finished, the high level is output through the first serial input/output port of the main control chip, so that the triode is conducted, the potential on the second resistor is continuously lowered, the starting state of the electronic equipment is kept, the electronic equipment can be directly started when being powered on for the first time, the electronic equipment is not required to be started through a power key, and the use convenience of the electronic equipment is improved.
Drawings
Fig. 1 is a schematic circuit connection diagram between a power supply capable of powering on and powering off and an electronic device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a connection between an upper power reset circuit capable of performing power-on and a control circuit mainly including a triode according to an embodiment of the present invention;
fig. 3 is a schematic connection diagram of a switch-based control circuit capable of powering on and powering off according to an embodiment of the present invention.
Description of reference numerals:
c1, a first capacitance; c2, a second capacitor; c3, a third capacitance; c4, a fourth capacitance; c5, a fifth capacitance; c6, a sixth capacitor; c7, a seventh capacitance; c8, an eighth capacitor;
d1, a first diode; d2, a second diode; d3, a third diode; d4, a fourth diode; d5, a fifth diode; DC. A power supply;
GPIO _1 and a first serial input/output pin; GPIO _2 and a second serial input/output pin;
j1, power interface;
k1, a switch;
q1, triode;
r1, a first resistor; r2, a second resistor; r3, third resistor; r4, fourth resistor; r5, fifth resistor; r6, sixth resistor; r7, seventh resistor; r8, eighth resistor; r9, ninth resistor; r10, tenth resistor; r11, eleventh resistor;
t1 and MOS tubes; TVS1, bidirectional transient suppression diode; TVS2, transient suppression diode;
u1, a main control chip; u2, reset chip; u3, common mode filter;
v1, external power supply.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1 to 3, a power switch circuit capable of powering on and powering off includes a power supply DC, a MOS transistor T1, a main control chip U1, a power-on reset circuit, a transistor Q1, a first resistor R1, a second resistor R2, a first capacitor C1, a third resistor R3, a fourth resistor R4, and a fifth resistor R5;
a voltage output end of the power supply DC is simultaneously connected to one end of the first capacitor C1, one end of the first resistor R1 and a source of the MOS transistor T1, the other end of the first capacitor C1 is simultaneously connected to the other end of the first resistor R1, one end of the second resistor R2 and a gate of the MOS transistor T1, and a drain of the MOS transistor T1 is used for connecting a power supply end of an electronic device;
the other end of the second resistor R2 is simultaneously connected to one end of the third resistor R3, the collector of the transistor Q1 and the reset signal output end of the power-on reset circuit, and the other end of the third resistor R3 is connected to the power supply input end of the power-on reset circuit;
the base electrode of the triode Q1 is connected to one end of the fourth resistor R4 and one end of the fifth resistor R5 at the same time, and the other end of the fourth resistor R4 is connected to the first serial input/output pin GPIO _1 of the main control chip U1;
the emitter of the triode Q1 and the other end of the fifth resistor R5 are both grounded, the MOS transistor T1 is a P-channel MOS transistor T1, and the triode Q1 is an NPN-type triode Q1.
From the above description, the beneficial effects of the present invention are: when the electronic equipment is powered on, the electrical position of a second resistor R2 connected with the grid of the MOS transistor T1 is low by utilizing a reset signal generated by a power-on reset circuit, so that the MOS transistor T1 is conducted; the power supply DC supplies power to the electronic equipment, namely the electronic equipment is started; and after the reset signal is ended, the high level is output through the first serial input/output port of the main control chip U1, so that the triode Q1 is conducted, the potential on the second resistor R2 is continuously lowered, the starting state of the device is maintained, the electronic device can be directly started when being powered on for the first time, the electronic device does not need to be started through a power key, and the use convenience of the electronic device is improved.
Further, the power-on reset circuit comprises a reset chip U2, a sixth resistor R6, a seventh resistor R7 and a second capacitor C2;
one end of the sixth resistor R6 is a power supply input end of the power-on reset circuit, the other end of the sixth resistor R6 is simultaneously connected with one end of the seventh resistor R7 and a power supply input end of the reset chip U2, the other end of the seventh resistor R7 is simultaneously connected with one end of the second capacitor C2 and a manual reset end of the reset chip U2, and a reset signal output end of the reset chip U2 is a reset signal output end of the power-on reset circuit;
the grounding end of the reset chip U2 and the other end of the second capacitor C2 are both grounded.
As can be seen from the above description, when the electronic device is powered on, and accordingly, the reset chip U2 triggers the power-on reset, the output reset signal will be low on the second resistor R2 connected to the gate of the MOS transistor T1, so that the MOS transistor T1 is turned on. The power supply DC supplies power to the electronic device. Therefore, the electronic equipment can be directly started up when being powered on for the first time, the electronic equipment does not need to be started through a power supply key, and the use convenience of the electronic equipment is improved.
Further, a switching element K1 and a first diode D1 are included;
the cathode of the first diode D1 is grounded through the switch K1, and the anode of the first diode D1 is connected to the end of the second resistor R2 connected to the third resistor R3.
As can be seen from the foregoing description, in addition to the reset signal, the present application may also lower the electrical position of the second resistor R2 connected to the gate of the MOS transistor T1 through the switch K1, so as to turn on the MOS transistor T1, that is, the electronic device is also powered, and the power on is completed.
Further, the power supply also comprises a second diode D2, an eighth resistor R8 and an external power supply V1;
the cathode of the second diode D2 is connected to the cathode of the first diode D1, the anode of the second diode D2 is connected to one end of the eighth resistor R8 and the second serial input/output pin GPIO _2 of the main control chip U1, the other end of the eighth resistor R8 is connected to the external power source V1, and the switch K1 is a touch switch.
As can be seen from the above description, the second serial input/output pin GPIO _2 of the main control chip U1 is used for detecting the level change of the terminal of the switch K1. When the switch K1 is pressed, the second serial input/output pin GPIO _2 of the main control chip U1 detects a low level, which indicates that the electronic device needs to be powered on. Therefore, the main control chip U1 can output a high level through the first serial input/output pin GPIO _1, so that the potential on the second resistor R2 is continuously lowered, and power supply and power on of the device are completed. In addition, the tact switch cannot be kept in a closed state by the action of the external force. Therefore, after the tact switch is reset, the electronic device can be continuously kept in a power supply state by the aid of the main control chip U1.
Further, a third capacitor C3 and a bidirectional transient suppression diode TVS1 are also included;
one end of the third capacitor C3 and the first anode of the bidirectional transient suppression diode TVS1 are both connected to the cathode of the first diode D1, and the other end of the third capacitor C3 and the second anode of the bidirectional transient suppression diode TVS1 are both grounded.
As can be seen from the above description, the bidirectional transient suppression diode TVS1 is capable of absorbing some transient spikes, thereby protecting other components in the circuit.
Further, the power supply DC comprises a power interface J1, a common mode filter U3, a ninth resistor R9, a tenth resistor R10 and a fourth capacitor C4;
a voltage output end of the power interface J1 is connected to a first pin of the first coil of the common mode filter U3 and one end of the ninth resistor R9, and a second pin of the first coil of the common mode filter U3 is connected to the other end of the ninth resistor R9 and one end of the fourth capacitor C4;
the ground terminal of the power interface J1, the two ends of the tenth resistor R10, the other end of the fourth capacitor C4, and the first pin and the second pin of the second coil on the common mode filter U3 are all grounded, and the connection between the second pin of the first coil on the common mode filter U3 and the fourth capacitor C4 is the voltage output terminal of the power supply DC.
As can be seen from the above description, the power supply DC also comprises a filter network based on a common-mode filter U3. The power supply input from the power supply interface J1 can suppress its own noise signal by the common mode suppressor, and eliminate interference, thereby obtaining a more stable output.
Further, a fifth capacitor C5 and a transient suppression diode TVS2 are also included;
one end of the fifth capacitor C5 and the cathode of the transient suppression diode TVS2 are both connected to the voltage output terminal of the power supply DC, and the other end of the fifth capacitor C5 and the anode of the transient suppression diode TVS2 are both grounded.
As can be seen from the above description, the transient suppression diode TVS2 is a high performance protection device in the form of a diode, which can protect other electronic components in the circuit from the surge pulse.
Further, a third diode D3 is also included;
the voltage output end of the power supply DC is connected with the anode of the third diode D3, and the cathode of the third diode D3 is simultaneously connected with one end of the first capacitor C1, one end of the first resistor R1 and the source of the MOS transistor T1.
As can be seen from the above description, the third diode D3 is connected to the voltage output terminal of the power supply DC, and can perform the function of clipping protection.
Further, a fourth diode D4, a sixth capacitor C6, and a fifth diode D5 are also included;
one end of the second resistor R2, which is far from the first resistor R1, is connected to the fourth diode D4 and to the collector of the transistor Q1 and one end of the sixth capacitor C6, one end of the second resistor R2, which is far from the first resistor R1, is connected to the reset signal output end of the power-on reset circuit through the fifth diode D5, and the other end of the sixth capacitor C6 is grounded.
As can be seen from the above description, the fourth diode D4 and the fifth diode D5 are respectively connected between the second resistor R2 and the collector of the transistor Q1 and between the second resistor R2 and the reset signal output terminal of the power-on reset circuit, so as to perform a switching function, and ensure that the end point potential of the second resistor R2 is set to be low only after the transistor Q1 is turned on or the power-on reset circuit outputs the reset signal.
Further, the power-on reset circuit further comprises a seventh capacitor C7, an eighth capacitor C8 and an eleventh resistor R11;
one end of the seventh capacitor C7 and one end of the eleventh resistor R11 are both connected to the power input end of the reset chip U2, and one end of the eighth capacitor C8 is connected to the reset signal output end of the reset chip U2;
the other end of the seventh capacitor C7, the other end of the eighth capacitor C8 and the other end of the eleventh resistor R11 are all grounded.
As can be seen from the above description, the seventh capacitor C7 and the eleventh resistor R11 form a rc filter network, which serves to filter the voltage signal input to the reset chip U2. The eighth capacitor C8 can prevent the reset signal output from the reset chip U2 from generating glitches.
Referring to fig. 1 and fig. 2, a first embodiment of the present invention is:
a power switch circuit capable of realizing power-on and power-on is shown in fig. 1 and comprises a power supply DC, an MOS transistor T1, a main control chip U1, a power-on reset circuit, a triode Q1, a first resistor R1, a second resistor R2, a first capacitor C1, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a fifth capacitor C5, a third diode D3 and a transient suppression diode TVS 2. As shown in the figure, a voltage output end of the power supply DC is connected to one end of the first capacitor C1, one end of the first resistor R1 and a source of the MOS transistor T1, the other end of the first capacitor C1 is connected to the other end of the first resistor R1, one end of the second resistor R2 and a gate of the MOS transistor T1, and a drain of the MOS transistor T1 is used for connecting a power supply end of the electronic device.
As shown in fig. 2, the other end of the second resistor R2 is connected to one end of the third resistor R3, the collector of the transistor Q1, and the reset signal output terminal of the power-on reset circuit, and the other end of the third resistor R3 is connected to the power supply input terminal of the power-on reset circuit. The base of the triode Q1 is connected to one end of the fourth resistor R4 and one end of the fifth resistor R5, and the other end of the fourth resistor R4 is connected to the first serial input/output pin GPIO _1 of the main control chip U1. The emitter of the transistor Q1 and the other end of the fifth resistor R5 are both grounded. The MOS transistor T1 is a P-channel MOS transistor T1, and the transistor Q1 is an NPN transistor Q1.
In this embodiment, the specific process of the electronic device to power on and start up is as follows:
as shown in fig. 1 and fig. 2, when the electronic device is powered on, the voltage output of the power supply DC flows into the power supply input terminal of the power-on reset circuit through the third resistor R3, so that the power-on reset circuit is powered on and outputs a low-level reset signal. Thus, the reset signal causes the terminal potential of the second resistor R2 to be set low, and the gate-source voltage of the MOS transistor T1 becomes a low level. Since the MOS transistor T1 is a P-channel MOS transistor T1, the MOS transistor T1 is turned on. At this time, the voltage output of the power supply DC can flow into the power supply terminal of the electronic device through the MOS transistor T1. The electronic device is powered on.
In this embodiment, as shown in fig. 1, one end of the fifth capacitor C5 and the cathode of the transient suppression diode TVS2 are both connected to the voltage output terminal of the power supply DC, and the other end of the fifth capacitor C5 and the anode of the transient suppression diode TVS2 are both grounded. The transient suppression diode TVS2 can protect other electronic components in the circuit from the surge pulse.
In addition, in the present embodiment, as shown in fig. 1, the voltage output terminal of the power supply DC is connected to the anode of the third diode D3, and the cathode of the third diode D3 is connected to one end of the first capacitor C1, one end of the first resistor R1, and the source of the MOS transistor T1.
Referring to fig. 2, the second embodiment of the present invention is:
based on the first embodiment, as shown in fig. 2, the power-on reset circuit includes a reset chip U2, a sixth resistor R6, a seventh resistor R7, a second capacitor C2, a seventh capacitor C7, an eighth capacitor C8, and an eleventh resistor R11. One end of the sixth resistor R6 is a power supply input end of the power-on reset circuit, the other end of the sixth resistor R6 is connected to one end of the seventh resistor R7 and a power input end of the reset chip U2, the other end of the seventh resistor R7 is connected to one end of the second capacitor C2 and a manual reset end of the reset chip U2, and a reset signal output end of the reset chip U2 is a reset signal output end of the power-on reset circuit. The ground terminal of the reset chip U2 and the other terminal of the second capacitor C2 are both grounded.
In this embodiment, as shown in fig. 2, one end of the seventh capacitor C7 and one end of the eleventh resistor R11 are both connected to the power input terminal of the reset chip U2, and one end of the eighth capacitor C8 is connected to the reset signal output terminal of the reset chip U2. The other end of the seventh capacitor C7, the other end of the eighth capacitor C8 and the other end of the eleventh resistor R11 are all grounded. Wherein, the eighth capacitor C8 may eliminate the glitch of the reset signal.
Referring to fig. 3, a third embodiment of the present invention is:
based on the first or second embodiment, as shown in fig. 3, the power switch circuit capable of powering on and powering off further includes a switching device K1, a first diode D1, a second diode D2, an eighth resistor R8, an external power source V1, a third capacitor C3, and a bidirectional transient suppression diode TVS 1. The cathode of the first diode D1 is grounded through the switch K1, and the anode of the first diode D1 is connected to the end of the second resistor R2 connected to the third resistor R3. The cathode of the second diode D2 is connected to the cathode of the first diode D1, the anode of the second diode D2 is connected to one end of the eighth resistor R8 and the second serial input/output pin GPIO _2 of the main control chip U1, the other end of the eighth resistor R8 is connected to the external power supply V1, and the switch K1 is a touch switch.
In this embodiment, as shown in fig. 3, one end of the third capacitor C3 and the first anode of the bidirectional transient suppression diode TVS1 are both connected to the cathode of the first diode D1, and the other end of the third capacitor C3 and the second anode of the bidirectional transient suppression diode TVS1 are both connected to ground. The bidirectional transient suppression diode TVS1 is capable of absorbing some transient spikes, thereby protecting other components in the circuit.
Referring to fig. 1, a fourth embodiment of the present invention is:
based on the first, second, or third embodiments, as shown in fig. 1, the power switch circuit for powering on and powering off includes a power interface J1, a common mode filter U3, a ninth resistor R9, a tenth resistor R10, and a fourth capacitor C4. The voltage output end of the power interface J1 is connected to the first pin of the first coil on the common-mode filter U3 and one end of a ninth resistor R9, and the second pin of the first coil on the common-mode filter U3 is connected to the other end of the ninth resistor R9 and one end of a fourth capacitor C4; the ground terminal of the power interface J1, two ends of the tenth resistor R10, the other end of the fourth capacitor C4, and the first pin and the second pin of the second coil on the common mode filter U3 are all grounded, and the connection between the second pin of the first coil on the common mode filter U3 and the fourth capacitor C4 is a voltage output terminal of the power supply DC. The filter network mainly comprising the common-mode filter U3 enables the power supply input from the power interface J1 to suppress self noise signals through the common-mode suppressor, eliminates interference and obtains more stable output.
In summary, the present invention discloses a power switch circuit capable of powering on and powering off, wherein when an electronic device is powered on, an electrical position of a second resistor connected to a gate of an MOS transistor is lowered by a reset signal generated by a power-on reset circuit mainly including a reset chip, so that the MOS transistor is turned on; the power supply supplies power to the electronic equipment, namely the electronic equipment is started; and after the reset signal is finished, the high level is output through the first serial input/output port of the main control chip, so that the triode is conducted, the potential on the second resistor is continuously lowered, the starting state of the device is kept, the electronic device can be directly started when being powered on for the first time, the electronic device is not required to be started through a power supply key, signal interference is eliminated through a common mode filter and some capacitors, the circuits are ensured to run safely and stably by additionally arranging components such as a transient suppression diode, a power supply starting mode utilizing the matching of a switching element and the main control chip is further provided, and the use convenience of the electronic device is improved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent modifications made by the contents of the present specification and the drawings, or applied to the related technical fields directly or indirectly, are included in the scope of the present invention.
Claims (10)
1. A power switch circuit capable of realizing power-on starting is characterized by comprising a power supply, an MOS (metal oxide semiconductor) tube, a main control chip, a power-on reset circuit, a triode, a first resistor, a second resistor, a first capacitor, a third resistor, a fourth resistor and a fifth resistor;
the voltage output end of the power supply is simultaneously connected with one end of the first capacitor, one end of the first resistor and the source electrode of the MOS tube, the other end of the first capacitor is simultaneously connected with the other end of the first resistor, one end of the second resistor and the grid electrode of the MOS tube, and the drain electrode of the MOS tube is used for connecting the power supply end of the electronic equipment;
the other end of the second resistor is simultaneously connected with one end of a third resistor, a collector of the triode and a reset signal output end of the power-on reset circuit, and the other end of the third resistor is connected with a power supply input end of the power-on reset circuit;
the base electrode of the triode is simultaneously connected with one end of the fourth resistor and one end of the fifth resistor, and the other end of the fourth resistor is connected with a first serial input/output pin of the main control chip;
the emitting electrode of the triode and the other end of the fifth resistor are both grounded, the MOS tube is a P-channel MOS tube, and the triode is an NPN-type triode.
2. The power switch circuit capable of realizing power-on and power-on according to claim 1, wherein the power-on reset circuit comprises a reset chip, a sixth resistor, a seventh resistor and a second capacitor;
one end of the sixth resistor is a power supply input end of the power-on reset circuit, the other end of the sixth resistor is simultaneously connected with one end of the seventh resistor and a power supply input end of the reset chip, the other end of the seventh resistor is simultaneously connected with one end of the second capacitor and a manual reset end of the reset chip, and a reset signal output end of the reset chip is a reset signal output end of the power-on reset circuit;
and the grounding end of the reset chip and the other end of the second capacitor are grounded.
3. The power switch circuit capable of power-on according to claim 1, further comprising a switching element and a first diode;
the negative electrode of the first diode is grounded through the switch piece, and the positive electrode of the first diode is connected with one end of the second resistor, which is connected with the third resistor.
4. The power switch circuit capable of being powered on according to claim 3, further comprising a second diode, an eighth resistor and an external power source;
the negative electrode of the second diode is connected with the negative electrode of the first diode, the positive electrode of the second diode is simultaneously connected with one end of the eighth resistor and the second serial input/output pin of the main control chip, the other end of the eighth resistor is connected with the external power supply, and the switch element is a light-touch switch.
5. The power switch circuit capable of being powered on according to claim 3, further comprising a third capacitor and a bidirectional transient suppression diode;
one end of the third capacitor and the first positive electrode of the bidirectional transient suppression diode are connected with the negative electrode of the first diode, and the other end of the third capacitor and the second positive electrode of the bidirectional transient suppression diode are grounded.
6. The power switch circuit capable of powering on and off according to claim 1, wherein the power supply comprises a power interface, a common mode filter, a ninth resistor, a tenth resistor, and a fourth capacitor;
a voltage output end of the power supply interface is simultaneously connected with a first pin of a first coil on the common mode filter and one end of the ninth resistor, and a second pin of the first coil on the common mode filter is simultaneously connected with the other end of the ninth resistor and one end of the fourth capacitor;
the ground terminal of the power supply interface, the two ends of the tenth resistor, the other end of the fourth capacitor, and the first pin and the second pin of the second coil on the common mode filter are all grounded, and the joint of the second pin of the first coil on the common mode filter and the fourth capacitor is the voltage output end of the power supply.
7. The power switch circuit capable of being powered on according to claim 1, further comprising a fifth capacitor and a transient suppression diode;
one end of the fifth capacitor and the cathode of the transient suppression diode are both connected with the voltage output end of the power supply, and the other end of the fifth capacitor and the anode of the transient suppression diode are both grounded.
8. The power switch circuit capable of being powered on according to claim 1, further comprising a third diode;
and the voltage output end of the power supply is connected with the anode of the third diode, and the cathode of the third diode is simultaneously connected with one end of the first capacitor, one end of the first resistor and the source electrode of the MOS tube.
9. The power switch circuit capable of being powered on according to claim 1, further comprising a fourth diode, a sixth capacitor and a fifth diode;
one end of the second resistor, which is far away from the first resistor, is connected with the fourth diode through positive connection and is simultaneously connected with the collector of the triode and one end of the sixth capacitor, one end of the second resistor, which is far away from the first resistor, is connected with the reset signal output end of the power-on reset circuit through positive connection with the fifth diode, and the other end of the sixth capacitor is grounded.
10. The power switch circuit capable of powering on and starting up according to claim 2, wherein the power-on reset circuit further comprises a seventh capacitor, an eighth capacitor and an eleventh resistor;
one end of the seventh capacitor and one end of the eleventh resistor are both connected with the power input end of the reset chip, and one end of the eighth capacitor is connected with the reset signal output end of the reset chip;
the other end of the seventh capacitor, the other end of the eighth capacitor and the other end of the eleventh resistor are all grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121356387.6U CN215528982U (en) | 2021-06-18 | 2021-06-18 | Power switch circuit capable of realizing power-on starting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121356387.6U CN215528982U (en) | 2021-06-18 | 2021-06-18 | Power switch circuit capable of realizing power-on starting |
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| Publication Number | Publication Date |
|---|---|
| CN215528982U true CN215528982U (en) | 2022-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121356387.6U Active CN215528982U (en) | 2021-06-18 | 2021-06-18 | Power switch circuit capable of realizing power-on starting |
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| Country | Link |
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| CN (1) | CN215528982U (en) |
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2021
- 2021-06-18 CN CN202121356387.6U patent/CN215528982U/en active Active
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