CN204794742U - Can accept voltage stabilizing circuit of multiple input voltage grade - Google Patents
Can accept voltage stabilizing circuit of multiple input voltage grade Download PDFInfo
- Publication number
- CN204794742U CN204794742U CN201520478899.8U CN201520478899U CN204794742U CN 204794742 U CN204794742 U CN 204794742U CN 201520478899 U CN201520478899 U CN 201520478899U CN 204794742 U CN204794742 U CN 204794742U
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit
- winding
- output
- gate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model provides a can accept voltage stabilizing circuit of multiple input voltage grade, includes, has a plurality of output winding's transformer, switching circuit, the input winding of transformer accepts input voltage, a plurality of output winding's of transformer coil figure is different to produce different output voltage, the output winding of transformer with switch circuit connection, the switching circuit requires to select suitable output winding according to output voltage's steady voltage to make stabilization of output, the technical scheme of the utility model simple easy implementation does not need complicated control circuit can realize the steady voltage effect to multiple input voltage grade.
Description
Technical field
The invention relates to voltage stabilizing circuit, and relate to the voltage stabilizing circuit regulating various input voltage grade especially.
Background technology
Notebook computer, the charging voltage of the power consumption equipment such as mobile phone and panel computer has difference, if desired the adapter that design one is general, for multiple power consumption equipment charges, then described adapter adjusts output voltage with regard to needing according to different power consumption equipments, such as when adapter connects computer, the power circuit output voltage of adapter is 20V, when adapter connects mobile phone, the power circuit output voltage of adapter is 5V or 9V, but the auxiliary circuit in adapter is also often use the output of power circuit to power, and auxiliary circuit required voltage is certain, such as 15V, so when the output voltage change of the power circuit of adapter, just need a voltage stabilizing circuit, ensure the normal power supply of auxiliary circuit.Technical problem to be solved by this invention is just to provide a kind of like this voltage stabilizing circuit receiving various input voltage grade, and the voltage that output voltage values is certain.
Summary of the invention
The invention provides a kind of voltage stabilizing circuit, various input voltage grade can be received and export fixing voltage.Can be applicable to general adapter, for its auxiliary circuit provides stable voltage source.
Technical scheme of the present invention, a kind of voltage stabilizing circuit that can accept various input voltage grade, comprise, there is the transformer of multiple output winding, commutation circuit, the input winding of described transformer accepts input voltage, the coil count of multiple output windings of described transformer is different, to produce different output voltages, each output winding of described transformer is connected with commutation circuit first end described in, second end of described commutation circuit is in parallel, when wherein one export the output voltage of winding meet the voltage that voltage stabilizing requires time, close with the commutation circuit of this output windings in series, all the other commutation circuits turn off, described commutation circuit requires to select suitable output winding according to the voltage stabilizing of output voltage, to make output voltage stabilization.
In a specific embodiment of the present invention, described commutation circuit is made up of a master switch and drive circuit, described drive circuit comprises a voltage detecting circuit and a gate voltage drive circuit, when voltage detecting circuit detects that described output voltage meets the demands, it controls the conducting of described gate voltage drive circuit, for described master switch provides gate drive voltage to make its conducting, when voltage detecting circuit detects that described output voltage does not meet the demands, it controls described gate voltage drive circuit and turns off, and described master switch also turns off.
In a specific embodiment of the present invention, described voltage detecting circuit is a voltage stabilizing didoe, the negative electrode of described voltage stabilizing didoe is connected with described output voltage, the anode of described voltage stabilizing didoe is connected with gate voltage drive circuit, when described voltage stabilizing didoe conducting, described gate voltage drive circuit turns off; When described voltage stabilizing didoe turns off, described gate voltage drive circuit is open-minded.
In a specific embodiment of the present invention, described gate voltage drive circuit is made up of two switching tubes, the collector electrode of described first switching tube is connected with the gate pole of described second switch pipe, the gate pole of described first switch is connected with the anode of described voltage stabilizing didoe, and be connected with the ground end of described output winding by the first gate electrode resistance, the gate pole of described second switch is connected with the intermediate point of a resistor voltage divider circuit simultaneously, described resistor voltage divider circuit and described output winding parallel, the collector electrode of described second switch pipe is connected with the gate pole of described master switch, the emitter of described second switch pipe is connected with the ground end of described output winding.
In a specific embodiment of the present invention, described gate voltage drive circuit is only made up of the 3rd switching tube, the gate pole series connection of described 3rd switching tube and described master switch, be connected with the ground end of described output winding after series connection, the gate pole of described 3rd switching tube is connected with the anode of described voltage stabilizing didoe, and be connected with the ground end of described output winding by the 3rd gate electrode resistance, the gate pole of described master switch is also connected one the 5th resistance, one the 6th resistance is connected between the gate pole of master switch and collector electrode, when described 3rd switching tube conducting, described 5th resistance and described 6th resistance form the gate voltage that a bleeder circuit limits described master switch.
In a specific embodiment of the present invention, described commutation circuit is also connected with the anode of a diode.
In a specific embodiment of the present invention, the described transformation with multiple output winding only has two to export winding, wherein the first output winding is connected with above-mentioned commutation circuit, second exports winding is directly connected with the anode of the second diode, and the negative electrode of described second diode is in parallel with the second end of described commutation circuit.
In a specific embodiment of the present invention, the described transformation with multiple output winding only has two to export winding, also connect with the anode of one first diode after described first output winding is connected with commutation circuit, second exports winding is directly connected with the anode of the second diode, the negative electrode of described second diode and the negative electrode parallel connection of described first diode.
In a specific embodiment of the present invention, described first exports winding and described second exports windings in series.
For above-mentioned feature and advantage of the present invention can be become apparent, special embodiment below, and coordinate institute's accompanying drawings to be described in detail below.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of first embodiment of the invention.
Fig. 2 is the first specific embodiment circuit diagram of commutation circuit of the present invention.
Fig. 3 is the second specific embodiment circuit diagram of commutation circuit of the present invention.
Fig. 4 is the circuit diagram of second embodiment of the invention.
Fig. 5 is the circuit diagram of third embodiment of the invention.
Fig. 6 is the circuit diagram of fourth embodiment of the invention.
Fig. 7 is the circuit diagram of fifth embodiment of the invention.
Fig. 8 is the circuit diagram of sixth embodiment of the invention.
Specific embodiment
The embodiment of the present invention provides a kind of voltage stabilizing circuit, various input voltage grade can be received, according to the requirement of output voltage, quick voltage stabilizing, and the requirement of input and output voltage isolation can be met, can be applicable to universal adapter, receive the output voltage of universal adapter, the auxiliary circuit for adapter provides stable voltage source.Described universal adapter refers to the adapter that a class output voltage is variable.In order to make the content of this exposure more easily be understood, below especially exemplified by the example that embodiment can be implemented really according to this as the present invention.In addition, all may part, in graphic and execution mode, use the assembly/component/step of identical label, be represent identical or like.
Fig. 1 is the circuit diagram of first embodiment of the invention, a kind of voltage stabilizing circuit that can accept various input voltage grade, comprise, there is the transformer T of multiple output winding, commutation circuit W, the input winding P of described transformer T has input 11 and accepts input voltage, described input voltage can be various input voltage grade, described transformer T comprises multiple output winding S1, S2 and to Sn, the coil count of described multiple output winding S1-Sn is different, to produce different output voltages, each output winding of described transformer is connected with commutation circuit W first end described in, second end of described commutation circuit W is in parallel, and form output 12 with the ground end of described output winding, the effect of described commutation circuit W1-Wn is: when wherein one export the output voltage of winding meet the voltage that voltage stabilizing requires time, close with the commutation circuit of this output windings in series, all the other commutation circuits turn off, described commutation circuit requires to select suitable output winding according to the voltage stabilizing of output voltage, to make output voltage stabilization.
Fig. 2 is a specific embodiment circuit diagram of commutation circuit of the present invention.Commutation circuit W described in the present embodiment, be made up of a master switch Q1 and drive circuit 20, described drive circuit 20 comprises voltage detecting circuit 201 and a gate voltage drive circuit 202, when voltage detecting circuit 201 detect the voltage of connected output winding meet voltage stabilizing require time, it controls the conducting of described gate voltage drive circuit 202, for described master switch Q1 provides gate drive voltage to make its conducting, when voltage detecting circuit 201 detects that the output voltage of connected output winding does not meet the demands, it controls described gate voltage drive circuit 202 and turns off, described master switch Q1 also turns off.
In a specific embodiment of the present invention, as shown in Figure 2, described voltage detecting circuit is a voltage stabilizing didoe DZ, the negative electrode of described voltage stabilizing didoe DZ is connected with the output of the output winding S of described transformer T, for detecting the output voltage exporting winding, the anode of described voltage stabilizing didoe DZ is connected with gate voltage drive circuit 202, when the output voltage of described output winding is greater than the puncture voltage of described voltage stabilizing didoe DZ, described voltage stabilizing didoe DZ conducting, described gate voltage drive circuit 202 turns off; When the output voltage of described output winding is less than the puncture voltage of described voltage stabilizing didoe DZ, described voltage stabilizing didoe DZ ends, and described gate voltage drive circuit 202 is open-minded.
In a specific embodiment of the present invention, as shown in Figure 2, described gate voltage drive circuit 202 is made up of two switching tubes, the collector electrode of described first switching tube Q2 is connected with the gate pole of described second switch pipe Q3, the gate pole Q2 of described first switch is connected with the anode of described voltage stabilizing didoe DZ, and be connected with the ground end of described output winding by the first gate electrode resistance R1, the gate pole of described second switch Q3 is connected with the intermediate point of a resistor voltage divider circuit (R2-R3) simultaneously, described resistor voltage divider circuit and described output winding parallel, when the first switching tube Q2 turns off, the output voltage exporting winding described in described bleeder circuit dividing potential drop provides gate drive voltage for described second switch pipe Q3, the collector electrode of described second switch pipe Q3 is connected with the gate pole of described master switch Q1, the emitter of described second switch pipe Q3 is connected with the ground end of described output winding.
Fig. 3 is the another specific embodiment of commutation circuit of the present invention, in the present embodiment, gate voltage drive circuit described in described gate voltage drive circuit 302 is made up of a 3rd switching tube Q4, the gate pole series connection of described 3rd switching tube Q4 and described master switch Q1, be connected with the ground end of described output winding after series connection, the gate pole of described 3rd switching tube Q4 is connected with the anode of described voltage stabilizing didoe DZ, and be connected with the ground end of described output winding by the 3rd gate electrode resistance R4, the gate pole of described master switch Q1 is also connected one the 5th resistance R5, one the 6th resistance is connected between the gate pole of master switch Q1 and collector electrode, when described 3rd switching tube Q4 conducting, described 5th resistance R5 and described 6th resistance R6 forms a bleeder circuit, and the resistance value of the 6th resistance R6 is much larger than the resistance value of the 5th resistance R5, this makes the gate voltage of described master switch Q1 be less than its driving voltage, and be turned off.
Fig. 4 is the circuit diagram of the second embodiment of the present invention, in figure, each output winding first connects a current rectifying and wave filtering circuit, described current rectifying and wave filtering circuit is in series by an a diode D and electric capacity C, be connected with described output windings in series after described diode D and electric capacity C are connected in series, carry out rectifying and wave-filtering to the output of described output winding, the both end voltage of described electric capacity C is output voltage.
Fig. 5 is the circuit diagram of third embodiment of the invention, and in the present embodiment, transformer T only comprises two and exports winding S1 and S2, wherein export winding S1 to connect with commutation circuit W1, also connect with a diode D1, but exporting winding S2 only connects with diode D2, eliminates commutation circuit W2.The output voltage exporting winding S1 in the present embodiment is greater than the output voltage exporting winding S2.The master switch Q1 of commutation circuit W1 closes, and because the output voltage exporting winding S1 is greater than the output voltage exporting winding S2, diode D2 can be automatically closed, and output 51 exports the output voltage of winding S1; When the master switch S1 of commutation circuit W1 turns off, diode D2 conducting, output 51 exports the output voltage of winding S2.When the output voltage exporting winding S1 in the present embodiment is greater than the puncture voltage of voltage stabilizing didoe DZ, the gate pole of switching tube Q2 creates gate drive voltage, switching tube Q2 conducting, this makes the gate pole of switching tube Q3 hold be connected with ground, switching tube Q3 turns off, gate drive voltage circuit shut-down, master switch Q1 turns off, and commutation circuit W1 also just turns off.Contrary, when the output voltage of output winding S1 is less than the puncture voltage of voltage stabilizing didoe DZ, the gate pole of switching tube Q2 does not have driving voltage, switching tube Q2 turns off, the output voltage that bleeder circuit R2 and R3 dividing potential drop export winding S1 provides gate drive voltage for switching tube Q3, and switching tube Q3 is open-minded, the gate pole of master switch Q1 with hold and be connected, master switch Q1 conducting, commutation circuit W1 is also with regard to conducting.The present embodiment breaker in middle pipe Q2 and Q3 is NPN type triode, and master switch Q1 is PNP type triode.As shown in Figure 7, in the present embodiment, winding S2 can be a part of winding S1, can guarantee like this to export the output voltage around work S1.
Fig. 6 is the circuit diagram of fourth embodiment of the invention, and the difference of the embodiment shown in the present embodiment and Fig. 5 eliminates diode D1.Identical its winding S2 can be a part of winding S1, as shown in Figure 8.
The voltage stabilizing circuit of the embodiment of the present invention, universal adapter can be applied to, described universal adapter is a kind of adapter that can export multiple voltage grade, and described voltage stabilizing circuit receives the output voltage of adapter, and the output of voltage stabilizing circuit is that the auxiliary circuit of universal adapter is powered.Use the voltage stabilizing circuit of embodiment as shown in Figure 5, the output voltage of adapter is 5V or 20V, and this output voltage is provided to the input of voltage stabilizing circuit.Input winding P, the output winding S1 of the transformer of voltage stabilizing circuit and the turn ratio of output winding S2 are 4:4:1.When the input voltage of voltage stabilizing circuit is 5V, commutation circuit W1 conducting, voltage stabilizing circuit exports 5V, when the input voltage of voltage stabilizing circuit is 20V, commutation circuit turns off, voltage stabilizing circuit exports the output voltage of winding S2, and same or 5V, at this moment will select the puncture voltage of voltage stabilizing didoe DZ to be 20V.
In sum, the embodiment of the present invention proposes a kind of voltage stabilizing circuit, uses voltage stabilizing circuit provided by the invention can according to voltage stabilizing requirement rapid translating input voltage to the output voltage meeting voltage stabilizing requirement.
Although the present invention discloses as above with embodiment; so itself and be not used to limit the present invention; have in any art and usually know the knowledgeable; without departing from the spirit and scope of the present invention; when doing a little change and retouching, therefore protection scope of the present invention is when being as the criterion depending on the accompanying claim person of defining.
Claims (9)
1. one kind can accept the voltage stabilizing circuit of various input voltage grade, comprise, there is the transformer of multiple output winding, commutation circuit, the input winding of described transformer accepts input voltage, the coil count of multiple output windings of described transformer is different, to produce different output voltages, each output winding of described transformer is connected with commutation circuit first end described in, second end of described commutation circuit is in parallel, when wherein one export the output voltage of winding meet the voltage that voltage stabilizing requires time, close with the commutation circuit of this output windings in series, all the other commutation circuits turn off, described commutation circuit requires to select suitable output winding according to the voltage stabilizing of output voltage, to make output voltage stabilization.
2. a kind of voltage stabilizing circuit that can accept various input voltage grade as claimed in claim 1, it is characterized in that, described commutation circuit is made up of a master switch and drive circuit, described drive circuit comprises a voltage detecting circuit and a gate voltage drive circuit, when described voltage detecting circuit detects that described output voltage meets the demands, it controls the conducting of described gate voltage drive circuit, for described master switch provides gate drive voltage to make its conducting, when voltage detecting circuit detects that described output voltage does not meet the demands, it controls described gate voltage drive circuit and turns off, described master switch also turns off.
3. a kind of voltage stabilizing circuit that can accept various input voltage grade as claimed in claim 2, it is characterized in that, described voltage detecting circuit is a voltage stabilizing didoe, the negative electrode of described voltage stabilizing didoe is connected with described output voltage, the anode of described voltage stabilizing didoe is connected with gate voltage drive circuit, when described voltage stabilizing didoe conducting, described gate voltage drive circuit turns off; When described voltage stabilizing didoe turns off, described gate voltage drive circuit is open-minded.
4. a kind of voltage stabilizing circuit that can accept various input voltage grade as claimed in claim 3, it is characterized in that, described gate voltage drive circuit is made up of two switching tubes, the collector electrode of described first switching tube is connected with the gate pole of described second switch pipe, the gate pole of described first switch is connected with the anode of described voltage stabilizing didoe, and be connected with the ground end of described output winding by the first gate electrode resistance, the gate pole of described second switch is connected with the intermediate point of a resistor voltage divider circuit simultaneously, described resistor voltage divider circuit and described output winding parallel, the collector electrode of described second switch pipe is connected with the gate pole of described master switch, the emitter of described second switch pipe is connected with the ground end of described output winding.
5. a kind of voltage stabilizing circuit that can accept various input voltage grade as claimed in claim 3, it is characterized in that, described gate voltage drive circuit comprises the 3rd switching tube, the gate pole series connection of described 3rd switching tube and described master switch, be connected with the ground end of described output winding after series connection, the gate pole of described 3rd switching tube is connected with the anode of described voltage stabilizing didoe, and be connected with the ground end of described output winding by the 3rd gate electrode resistance, the gate pole of described master switch is also connected one the 5th resistance, one the 6th resistance is connected between the gate pole of master switch and collector electrode, when described 3rd switching tube conducting, described 5th resistance and described 6th resistance form the gate voltage that a bleeder circuit limits described master switch.
6. a kind of voltage stabilizing circuit that can accept various input voltage grade as claimed in claim 1, it is characterized in that, described commutation circuit is also connected with the anode of a diode.
7. a kind of voltage stabilizing circuit that can accept various input voltage grade as claimed in claim 1, it is characterized in that, the described transformation with multiple output winding only has two to export winding, wherein the first output winding is connected with above-mentioned commutation circuit, second exports winding is directly connected with the anode of the second diode, and the negative electrode of described second diode is in parallel with the second end of described commutation circuit.
8. a kind of voltage stabilizing circuit that can accept various input voltage grade as claimed in claim 1, it is characterized in that, the described transformation with multiple output winding only has two to export winding, also connect with the anode of one first diode after described first output winding is connected with commutation circuit, second exports winding is directly connected with the anode of the second diode, the negative electrode of described second diode and the negative electrode parallel connection of described first diode.
9. a kind of voltage stabilizing circuit that can accept various input voltage grade as described in claim 7 or 8, is characterized in that, described first exports winding and described second exports windings in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520478899.8U CN204794742U (en) | 2015-07-06 | 2015-07-06 | Can accept voltage stabilizing circuit of multiple input voltage grade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520478899.8U CN204794742U (en) | 2015-07-06 | 2015-07-06 | Can accept voltage stabilizing circuit of multiple input voltage grade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204794742U true CN204794742U (en) | 2015-11-18 |
Family
ID=54534714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520478899.8U Active CN204794742U (en) | 2015-07-06 | 2015-07-06 | Can accept voltage stabilizing circuit of multiple input voltage grade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204794742U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109980942A (en) * | 2019-03-25 | 2019-07-05 | 华中科技大学 | A kind of DC-DC converter based on segmented transformer |
-
2015
- 2015-07-06 CN CN201520478899.8U patent/CN204794742U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109980942A (en) * | 2019-03-25 | 2019-07-05 | 华中科技大学 | A kind of DC-DC converter based on segmented transformer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103546035B (en) | Flyback structure-based power conversion device and power conversion method thereof | |
| JP6302095B2 (en) | Switching power supply and method for controlling the switching power supply | |
| CN103326458B (en) | A kind of external power source and battery powered power supply switch circuit | |
| US9112423B2 (en) | Bidirectional DC-DC converter and power supply system | |
| CN203313144U (en) | Backflow prevention circuit | |
| CN205070791U (en) | Switching power supply from supply circuit | |
| CN103944353A (en) | High reliability bias power supply | |
| CN208904889U (en) | Power supply timing control circuit | |
| CN104698262A (en) | Zero cross detection circuit and variable frequency air conditioner | |
| CN105960752A (en) | Isolated fly-buck converter, switched mode power supply, and method of measuring a voltage on a secondary side of an isolated fly-buck converter | |
| US20170093289A1 (en) | High Efficiency Primary and Secondary Bias Flyback Converter with Dual Outputs | |
| CN204794742U (en) | Can accept voltage stabilizing circuit of multiple input voltage grade | |
| CN104009638B (en) | A kind of circuit for adjusting output voltage and method | |
| CN105356564A (en) | Wireless energy receiving system | |
| CN104057181A (en) | Open-phase protection circuit for inverter welding machine | |
| CN108494247B (en) | Power supply circuit giving consideration to 180V high-voltage protection and 5V low-voltage work | |
| WO2023155424A1 (en) | Voltage conversion unit, inverter, and photovoltaic power generation system | |
| CN203734340U (en) | Compatible type mobile power supply | |
| CN105846700A (en) | LLC half-bridge resonant converter and secondary synchronous rectifier device thereof | |
| CN204597781U (en) | A kind of switching power circuit | |
| CN202455057U (en) | Power supply protecting circuit | |
| CN213027822U (en) | Switching power supply constant current circuit, switching power supply chip and turn-off circuit | |
| CN205070792U (en) | Switching power supply from supply circuit | |
| CN212183174U (en) | Charging circuit, auxiliary power supply and operation equipment | |
| CN103855731A (en) | Uninterrupted rechargeable battery power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |