CN220605773U - Automatic code dialing circuit and voltage doubling circuit - Google Patents
Automatic code dialing circuit and voltage doubling circuit Download PDFInfo
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- CN220605773U CN220605773U CN202321753459.XU CN202321753459U CN220605773U CN 220605773 U CN220605773 U CN 220605773U CN 202321753459 U CN202321753459 U CN 202321753459U CN 220605773 U CN220605773 U CN 220605773U
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Abstract
The utility model relates to an automatic dialing circuit and a voltage doubling circuit, wherein the automatic dialing circuit comprises a sampling module, a power taking module, a voltage stabilizing amplifying module and a dialing module; the output end of the power taking module is connected to the input end of the voltage stabilizing and amplifying module, the input end of the sampling module is connected to the output end of the power taking module, the output end of the voltage stabilizing and amplifying module is connected to the input end of the code dialing module, and the first input end of the sampling module is connected with an input voltage; when the input voltage is greater than the reference voltage, the sampling module pulls down the output voltage of the output end of the power taking module, so that the voltage stabilizing and amplifying module and the code dialing module stop working. The utility model controls the on-off of the switch of the dial module through the sampling module, thereby realizing automatic dial voltage doubling, effectively avoiding the problem of power supply damage caused by the condition that the manual dial voltage doubling is not adjusted when the input voltage is changed, realizing automation and greatly reducing labor cost.
Description
Technical Field
The utility model belongs to the field of switching power supplies, and relates to an automatic dialing circuit and a voltage doubling circuit
Background
The existing switching power supply has wide application field and higher requirement on automatic regulation and integration. In economical products with lower PF value requirements, no boost circuit is usually added to reduce the cost, and an input voltage doubling circuit+single-stage main topology structure is more preferred, and the input voltage of the structure is usually divided into stages: such as 90V-130V and 180V-264V inputs, while the voltage doubler circuit also operates only at the low voltage stage input, the high voltage stage not. A dial switch is often used, and the switch needs to be manually dialed, namely, the dial switch is connected when low voltage is input, and the dial switch needs to be manually disconnected when high voltage is input. If the dial switch is not turned off during high voltage input, the high voltage is doubled, and internal devices of a power supply product are immediately damaged.
Disclosure of Invention
The utility model aims to provide an automatic dialing circuit and a voltage doubling circuit, which realize the effect of replacing manual dialing by automatic dialing and avoid the problem of power supply damage caused by the condition that the voltage doubling state is not adjusted by manual dialing when the input voltage is changed.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
in a first aspect, an embodiment of the present application provides an automatic dialing circuit, where the automatic dialing circuit includes a sampling module, a power taking module, a voltage stabilizing amplifying module and a dialing module;
the output end of the power taking module is connected to the input end of the voltage stabilizing and amplifying module, the input end of the sampling module is connected to the output end of the power taking module, the output end of the voltage stabilizing and amplifying module is connected to the input end of the code dialing module, and the first input end of the sampling module is connected with an input voltage;
when the input voltage is greater than the reference voltage, the sampling module pulls down the output voltage of the output end of the power taking module, so that the voltage stabilizing and amplifying module and the code dialing module stop working.
Further, the power supply device further comprises a compensation module, wherein a first input end of the compensation module and a second input end of the compensation module are connected to an output end of the power taking module, and an output end of the compensation module is connected to a second input end of the sampling module.
Further, the sampling module comprises a first resistor, a second resistor, a first capacitor and a first MOS tube, wherein a first end of the first resistor is connected with an input voltage, a second end of the first resistor is connected to a grid electrode of the first MOS tube, a second end of the first resistor is connected to a source electrode of the first MOS tube through the second resistor, a second end of the first resistor is connected to the source electrode of the first MOS tube through the first capacitor, the source electrode of the first MOS tube is connected with the ground, and a drain electrode of the first MOS tube is connected to an output end of the power taking module.
Further, the power taking module comprises a fourth resistor and a first diode, the anode of the first diode is connected to the power supply end through the fourth resistor, and the output end of the first diode is respectively connected with the input end of the voltage stabilizing amplifying module and the input end of the sampling module.
Further, the voltage-stabilizing magnifier module comprises a fifth resistor, a voltage-stabilizing tube, a second capacitor, a third capacitor and a first triode, wherein an emitter of the first triode is connected to an output end of the electricity-taking module through the fifth resistor, an emitter of the first triode is connected with a cathode of the voltage-stabilizing tube, an anode of the voltage-stabilizing tube and a base of the first triode are both connected with the ground, an emitter of the first triode is connected with the ground through the second capacitor, a collector of the first triode is connected with the ground through the third capacitor, and a collector of the first triode is connected to an input end of the code-dialing module.
Further, the code dialing module comprises a sixth resistor and a relay, wherein a first end of the sixth resistor is connected to the output end of the voltage stabilizing and amplifying module, and a second end of the sixth resistor is connected with the ground through the relay.
Further, the compensation module comprises a third resistor and a second triode, the emitter and the base of the second triode are both connected to the output end of the electricity taking module, and the collector of the second triode is connected to the second input end of the sampling module through the third resistor.
Further, the sampling module is also connected to the voltage stabilizing amplifying module.
Further, the sampling module comprises a first resistor, a second resistor, a seventh resistor, an eighth resistor, a first capacitor, a first MOS tube and a second MOS tube, wherein the first end of the first resistor is connected with an input voltage, the second end of the first resistor is connected to the grid electrode of the first MOS tube, the second end of the first resistor is connected to the source electrode of the first MOS tube through the second resistor, the second end of the first resistor is connected to the source electrode of the first MOS tube through the first capacitor, the source electrode of the first MOS tube is connected with the ground, the drain electrode of the first MOS tube is connected to the output end of the power taking module through the seventh resistor, the drain electrode of the first MOS tube is connected to the grid electrode of the second MOS tube through the eighth resistor, the drain electrode of the second MOS tube is connected to the voltage stabilizing amplifying module, and the source electrode of the second MOS tube is connected with the ground.
In a second aspect, the present application further provides a voltage doubling circuit, including the automatic dialing circuit in the first aspect.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model controls the on-off of the switch of the dial module through the sampling module, thereby realizing automatic dial voltage doubling, effectively avoiding the problem of power supply damage caused by the condition that the manual dial voltage doubling is not adjusted when the input voltage is changed, realizing automation and greatly reducing labor cost. In addition, the circuit of the utility model is simple, the cost is similar to that of a common dial switch, and no extra cost is required to be added.
Drawings
FIG. 1 is a schematic circuit diagram of a first embodiment of an automatic dialing circuit according to the present utility model;
fig. 2 is a schematic circuit diagram of a second embodiment of an automatic dialing circuit according to the present utility model.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1, an embodiment of the present utility model provides an automatic dialing circuit, which includes a sampling module 101, a power taking module 102, a voltage stabilizing and amplifying module 103 and a dialing module 104;
the output end of the power taking module 102 is connected to the input end of the voltage stabilizing and amplifying module 103, the input end of the sampling module 101 is connected to the output end of the power taking module 102, the output end of the voltage stabilizing and amplifying module 103 is connected to the input end of the code dialing module 104, and the first input end of the sampling module 101 is connected with input voltage;
when the input voltage is greater than the reference voltage, the sampling module 101 pulls down the output voltage of the output end of the power taking module 102, so that the voltage stabilizing and amplifying module 103 and the code dialing module 104 stop working.
In this embodiment, the reference voltage is 135V, and the circuit of this embodiment may be used in a voltage doubling circuit, where the dial module 104 acts as a dial switch in the voltage doubling circuit, and the dial module 104 conducts the voltage doubling circuit, so as to perform voltage doubling. When the dial module 104 is turned off, no voltage doubling is performed. When the input voltage is higher than 135V, the sampling module 101 controls the voltage at the M point to be pulled low, and the voltage stabilizing and amplifying module 103 and the code dialing module 104 are not conducted and are not multiplied. When the input voltage is lower than 130V and the M point voltage is high, the electricity taking module 102 takes electricity through the pre-stage sampling to charge the voltage stabilizing amplifying module 103, the voltage is linearly stabilized at about 15V, the electricity is supplied to the code dialing module 104 after passing through the voltage stabilizing circuit, when the A point voltage reaches the conducting voltage of the code dialing module 104, the code dialing module 104 is conducted, and at the moment, the voltage doubling circuit is connected to conduct the voltage doubling action of the input voltage. Therefore, the circuit can automatically perform dialing action, switch or conduct through input voltage detection, overcomes the problems of time and labor consumption and inaccuracy of manual dialing and solves the problem of power supply damage caused by that the power supply state is not manually adjusted by dialing when the input voltage changes.
In one embodiment, the sampling module 101 is configured to sample the input voltage and transmit the sampled voltage signal to the voltage stabilizing and amplifying module 103. The sampling module comprises a first resistor R1, a second resistor R2, a first capacitor C1 and a first MOS tube M1, wherein the first end of the first resistor R1 is connected with an input voltage, the second end of the first resistor R1 is connected to the grid electrode of the first MOS tube M1, the second end of the first resistor R1 is connected to the source electrode of the first MOS tube M1 through the second resistor R2, the second end of the first resistor R1 is connected to the source electrode of the first MOS tube M1 through the first capacitor C1, the source electrode of the first MOS tube M1 is connected with the ground, and the drain electrode of the first MOS tube M1 is connected to the output end of the power taking module 102.
In an embodiment, the circuit of the power taking module 102 is used for taking power from the power supply terminal VCC to supply power to the voltage stabilizing and amplifying module 103 and the dialing module 104. The power taking module 102 comprises a fourth resistor R4 and a first diode D1, wherein the anode of the first diode D1 is connected to the power supply end VCC through the fourth resistor R4, and the output end of the first diode D1 is respectively connected with the input end of the voltage stabilizing amplifying module 103 and the input end of the sampling module 101.
In one embodiment, the voltage stabilizing and amplifying module 103 is used for stabilizing and amplifying the input voltage and current. The voltage stabilizing amplifier module comprises a fifth resistor R5, a voltage stabilizing tube ZD, a second capacitor C2, a third capacitor C3 and a first triode Q1, wherein an emitter of the first triode Q1 is connected to an output end of the electricity taking module 102 through the fifth resistor R5, the emitter of the first triode Q1 is connected with a cathode of the voltage stabilizing tube ZD, an anode of the voltage stabilizing tube ZD and a base of the first triode Q1 are both connected with the ground, an emitter of the first triode Q1 is connected with the ground through a second capacitor C2, a collector of the first triode Q1 is connected with the ground through a third capacitor C3, and a collector of the first triode Q1 is connected to an input end of the code dialing module 104.
In one embodiment, the dialing module 104 is a dialing circuit, and uses the on-off of the relay K1 to perform automatic dialing. The dial module 104 includes a sixth resistor R6 and a relay K1, where a first end of the sixth resistor R6 is connected to an output end of the voltage stabilizing amplifying module 103, and a second end of the sixth resistor R6 is connected to ground through the relay K1.
In this embodiment, the first MOS transistor M1 is an NMOS transistor, and the first transistor Q1 is a PNP transistor. When the input voltage is higher than 135Vac, the first MOS tube M1 is conducted, the point M is pulled down, the voltage stabilizing and amplifying module 103 does not work, the code dialing module 104 does not work, the relay K1 is turned off, and the voltage is not doubled. When the input voltage is lower than 130Vac, the first MOS tube M1 is turned off, the power taking module 102 takes power through the power supply end VCC to supply power to the voltage stabilizing and amplifying module 103, the power is supplied to the relay K1 at the rear end after voltage stabilization and amplification, when the power supply voltage reaches the on voltage of the relay K1, the relay K1 is conducted, and the voltage doubling circuit is connected, so that automatic code dialing and voltage doubling are realized.
In an embodiment, the compensation module 105 is a compensation circuit, the compensation module 105 includes a third resistor R3 and a second triode Q2, an emitter and a base of the second triode Q2 are both connected to the output end of the power taking module 102, and a collector of the second triode Q2 is connected to the second input end of the sampling module 101 through the third resistor R3.
The second triode Q2 is a PNP triode, and due to the compensation module 105, the input voltage needs to be lower and can be turned off to form a return difference, and the parameter setting of the third resistor R3 can adjust the compensation size. By adding the compensation module 105, the input voltage is doubled to 130V or less and is not doubled to 135V or more. The input voltage is increased from low voltage, the point M is always at high level before the first MOS tube M1 is not conducted, the compensation module 105 is not involved, and the first MOS tube M1 is conducted after the input voltage is increased to 135V; the input voltage is reduced from high voltage, and since the first MOS transistor M1 is always turned on at high voltage, the point M is low, and the compensation module 105 participates, the input voltage needs to be reduced to a lower voltage to turn off the first MOS transistor M1 at this time, instead of being turned off at a voltage of about one to 135V.
Referring to fig. 2, in an embodiment, the present utility model further provides an automatic dialing circuit, and the sampling module 101 is further connected to the voltage stabilizing amplifying module 103.
The sampling module comprises a first resistor R1, a second resistor R2, a seventh resistor, an eighth resistor, a first capacitor C1, a first MOS tube M1 and a second MOS tube M2, wherein the first end of the first resistor R1 is connected with an input voltage, the second end of the first resistor R1 is connected to the grid electrode of the first MOS tube M1, the second end of the first resistor R1 is connected to the source electrode of the first MOS tube M1 through the second resistor R2, the second end of the first resistor R1 is connected to the source electrode of the first MOS tube M1 through the first capacitor C1, the source electrode of the first MOS tube M1 is connected with the ground, the drain electrode of the first MOS tube M1 is connected to the output end of the power taking module 102 through the seventh resistor, the drain electrode of the first MOS tube M1 is connected to the grid electrode of the second MOS tube M2 through the eighth resistor, the drain electrode of the second MOS tube M2 is connected to the voltage stabilizing amplifying module 103, and the source electrode of the second MOS tube M2 is connected with the ground.
In this embodiment, the first MOS transistor M1 and the second MOS transistor M2 are NMOS transistors, and the first transistor Q1 and the second transistor Q2 are PNP transistors. When the input voltage is higher than 135Vac, sampling is performed through the sampling module 101, the sampling resistor is used for dividing the voltage, so that the first MOS tube M1 is conducted, the point M is pulled down to 0V, the second MOS tube M2 is not conducted, the voltage stabilizing amplifying module 103 does not work, the code dialing module 104 does not work, the relay K1 is turned off, and the voltage is not doubled. When the input voltage is lower than 130Vac, the first MOS tube M1 is turned off, the electricity taking module 102 is powered on through inputting to the second capacitor C2, the point M is high level, the second MOS tube M2 is conducted, the point N is pulled down, the voltage stabilizing amplifying module 103 works, the relay K1 is powered on after being limited by the sixth resistor R6, the relay K1 is conducted, and the voltage doubling circuit is connected.
In addition, the embodiment of the utility model also provides a voltage doubling circuit which comprises the automatic code dialing circuit. The dialing module 104 in the automatic dialing circuit is used for connecting or disconnecting the voltage doubling circuit.
The above embodiments are merely examples of the present utility model and are not intended to limit the scope of the present utility model, so any modifications, equivalents, etc. which do not depart from the principles of the present utility model should be included in the scope of the present utility model.
Claims (10)
1. The automatic dialing circuit is characterized by comprising a sampling module, a power taking module, a voltage stabilizing and amplifying module and a dialing module;
the output end of the power taking module is connected to the input end of the voltage stabilizing and amplifying module, the input end of the sampling module is connected to the output end of the power taking module, the output end of the voltage stabilizing and amplifying module is connected to the input end of the code dialing module, and the first input end of the sampling module is connected with an input voltage;
when the input voltage is greater than the reference voltage, the sampling module pulls down the output voltage of the output end of the power taking module, so that the voltage stabilizing and amplifying module and the code dialing module stop working.
2. An automatic dialing circuit according to claim 1, wherein: the power supply device further comprises a compensation module, wherein a first input end of the compensation module and a second input end of the compensation module are connected to the output end of the power supply module, and the output end of the compensation module is connected to the second input end of the sampling module.
3. An automatic dialing circuit according to claim 1, wherein: the sampling module comprises a first resistor, a second resistor, a first capacitor and a first MOS tube, wherein the first end of the first resistor is connected with an input voltage, the second end of the first resistor is connected to the grid electrode of the first MOS tube, the second end of the first resistor is connected to the source electrode of the first MOS tube through the second resistor, the second end of the first resistor is connected to the source electrode of the first MOS tube through the first capacitor, the source electrode of the first MOS tube is connected with the ground, and the drain electrode of the first MOS tube is connected to the output end of the power taking module.
4. An automatic dialing circuit according to claim 1, wherein: the power taking module comprises a fourth resistor and a first diode, wherein the anode of the first diode is connected to the power supply end through the fourth resistor, and the output end of the first diode is respectively connected with the input end of the voltage stabilizing amplifying module and the input end of the sampling module.
5. An automatic dialing circuit according to claim 1, wherein: the voltage stabilizing magnifier module comprises a fifth resistor, a voltage stabilizing tube, a second capacitor, a third capacitor and a first triode, wherein an emitting electrode of the first triode is connected to an output end of the electricity taking module through the fifth resistor, the emitting electrode of the first triode is connected with a cathode of the voltage stabilizing tube, an anode of the voltage stabilizing tube and a base electrode of the first triode are both connected with the ground, the emitting electrode of the first triode is connected with the ground through the second capacitor, a collecting electrode of the first triode is connected with the ground through the third capacitor, and a collecting electrode of the first triode is connected to an input end of the code dialing module.
6. An automatic dialing circuit according to claim 1, wherein: the dial module comprises a sixth resistor and a relay, wherein a first end of the sixth resistor is connected to the output end of the voltage stabilizing and amplifying module, and a second end of the sixth resistor is connected with the ground through the relay.
7. An automatic dialing circuit according to claim 2, wherein: the compensation module comprises a third resistor and a second triode, wherein an emitter and a base of the second triode are both connected to the output end of the electricity taking module, and a collector of the second triode is connected to the second input end of the sampling module through the third resistor.
8. An automatic dialing circuit according to claim 1, wherein: the sampling module is also connected to the voltage stabilizing and amplifying module.
9. The automatic dialing circuit according to claim 8, wherein: the sampling module comprises a first resistor, a second resistor, a seventh resistor, an eighth resistor, a first capacitor, a first MOS tube and a second MOS tube, wherein the first end of the first resistor is connected with an input voltage, the second end of the first resistor is connected to the grid electrode of the first MOS tube, the second end of the first resistor is connected to the source electrode of the first MOS tube through the second resistor, the second end of the first resistor is connected to the source electrode of the first MOS tube through the first capacitor, the source electrode of the first MOS tube is connected with the ground, the drain electrode of the first MOS tube is connected to the output end of the power taking module through the seventh resistor, the drain electrode of the first MOS tube is connected to the grid electrode of the second MOS tube through the eighth resistor, the drain electrode of the second MOS tube is connected to the voltage stabilizing amplifying module, and the source electrode of the second MOS tube is connected with the ground.
10. A voltage doubler circuit, characterized by: an automatic dialing circuit comprising the circuit of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321753459.XU CN220605773U (en) | 2023-07-05 | 2023-07-05 | Automatic code dialing circuit and voltage doubling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321753459.XU CN220605773U (en) | 2023-07-05 | 2023-07-05 | Automatic code dialing circuit and voltage doubling circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220605773U true CN220605773U (en) | 2024-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321753459.XU Active CN220605773U (en) | 2023-07-05 | 2023-07-05 | Automatic code dialing circuit and voltage doubling circuit |
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| Country | Link |
|---|---|
| CN (1) | CN220605773U (en) |
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2023
- 2023-07-05 CN CN202321753459.XU patent/CN220605773U/en active Active
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