CN215580899U - High-voltage starting circuit - Google Patents
High-voltage starting circuit Download PDFInfo
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- CN215580899U CN215580899U CN202121252756.7U CN202121252756U CN215580899U CN 215580899 U CN215580899 U CN 215580899U CN 202121252756 U CN202121252756 U CN 202121252756U CN 215580899 U CN215580899 U CN 215580899U
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Abstract
The utility model provides a high-voltage starting circuit, which comprises: the adjusting circuit is used for adjusting the input voltage and outputting charging current; and the charging control circuit is connected with the adjusting circuit, is used for being connected with the adjusting circuit and is used for receiving the charging current to charge the charging element. The technical scheme has the advantages that the output current of the adjusting circuit is determined by the resistor II, the semiconductor component and the voltage stabilizing diode, the output current of the adjusting circuit does not change along with the change of the input voltage of the adjusting circuit, namely, the charging time is not influenced, and on the other hand, the loss of the whole high-voltage starting circuit can be effectively reduced.
Description
Technical Field
The utility model relates to the technical field of electric control, in particular to a high-voltage starting circuit.
Background
In the field of switching power supplies, the switching power supplies are provided with starting circuits so as to start a control chip when the power supplies are powered on and drive a transformer to convert voltage, so that the normal work of the power supplies is realized, the power supplied by the control chip generally comes from an auxiliary winding, but when the power supplies are just started, the secondary side output is not established, the voltage of the auxiliary winding is low, the power cannot be supplied to the control chip, and on the other hand, the loss of the whole starting circuit is large.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems of the high-voltage starting circuit in the prior art, the high-voltage starting circuit which aims to effectively reduce the loss without influencing the charging time along with the voltage change is provided.
The specific technical scheme is as follows:
a high voltage startup circuit, comprising:
the adjusting circuit is used for adjusting the input voltage and outputting charging current;
and the charging control circuit is connected with the adjusting circuit, is used for being connected with the adjusting circuit and is used for receiving the charging current to charge the charging element.
Preferably, the adjusting circuit comprises a voltage input end, a first triode, a semiconductor component 12, a first resistor, a second resistor and a zener diode, wherein a drain electrode of the first triode is connected with the voltage input end;
the grid electrode of the first triode is connected with one end of the first resistor, the other end of the first resistor is connected with the voltage input end, one end of the semiconductor component 12 is connected with the grid electrode of the first triode, the other end of the semiconductor component is connected between the second resistor and the voltage stabilizing diode, and one end of the semiconductor component 12 connected with the grid electrode is grounded;
the drain electrode of the first triode is connected with one end of the second resistor, the other end of the second resistor is connected with the voltage stabilizing diode, and the output end of the voltage stabilizing diode is connected with the power supply end of the charging control circuit.
Preferably, the first resistor consists of three resistors connected in series.
Preferably, the semiconductor component 12 is formed by connecting a plurality of voltage-regulator tubes in series.
Preferably, the charging element in the charging control circuit is a capacitor.
Preferably, the charging control circuit further comprises a power supply end, a winding, a third resistor, a first capacitor, a second triode and a control chip, wherein the power supply end is connected with the output end of the adjusting circuit.
Preferably, the adjusting circuit is used for inputting an alternating voltage.
Preferably, the alternating voltage range used for inputting by the adjusting circuit is 90vac-380 vac.
Preferably, the control chip is connected with the second triode and used for supplying power to the control chip when the second triode is conducted.
Preferably, the power supply voltage for the control chip is 12V.
The technical scheme has the following advantages or beneficial effects:
the output current of the adjusting circuit is determined by the resistor II, the semiconductor component and the voltage stabilizing diode, the output current of the adjusting circuit does not change along with the change of the input voltage of the adjusting circuit, namely, the charging time is not influenced, and on the other hand, the loss of the whole high-voltage starting circuit can be effectively reduced.
Drawings
Embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings. The drawings are, however, to be regarded as illustrative and explanatory only and are not restrictive of the scope of the utility model.
Fig. 1 is a schematic structural diagram of a high voltage start circuit according to an embodiment of the present invention.
The above reference numerals denote:
1. an adjustment circuit; 2. a charge control circuit; 11. a second resistor; 12. a semiconductor component; 13. A voltage regulator diode; 21. and a charging element.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The utility model is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
The technical scheme of the utility model comprises a high-voltage starting circuit.
As shown in fig. 1, an embodiment of a high voltage start-up circuit includes:
an adjusting circuit 1 for adjusting an input voltage and outputting a charging current;
the charging control circuit 2 is connected to the adjusting circuit 1, and is connected to the adjusting circuit 1 for receiving the charging current to charge the charging device 21.
In a preferred embodiment, the adjusting circuit 1 includes a voltage input terminal, a first transistor QS41, a semiconductor component 12, a first resistor 11, a second resistor 11, and a zener diode 13, wherein a drain of the first transistor is connected to the voltage input terminal;
the grid electrode of the first triode is connected with one end of the first resistor, the other end of the first resistor is connected with the voltage input end, one end of the semiconductor component 12 is connected with the grid electrode of the first triode, the other end of the semiconductor component is connected between the second resistor 11 and the voltage stabilizing diode 13, and the end, connected with the grid electrode, of the semiconductor component 12 is grounded;
the drain electrode of the first triode is connected with one end of a second resistor 11, the other end of the second resistor 11 is connected with a voltage stabilizing diode, and the output end of the voltage stabilizing diode 13 is connected with the power supply end of the charging control circuit 2.
In the above technical solution, the output current of the regulator circuit 1 is determined by the resistor two 11(R4), the semiconductor component 12 and the zener diode 13, and the output current does not change with the change of the voltage of the input of the regulator circuit 1, i.e. the charging time is not affected, and on the other hand, the loss of the whole high-voltage start-up circuit can be effectively reduced.
In a preferred embodiment, resistor one is composed of three resistors connected in series (R1, R2, and R3, respectively).
In a preferred embodiment, semiconductor device 12 is comprised of a plurality of Zener diodes (ZD1-ZDn) connected in series.
In a preferred embodiment, the charging element 21 in the charge control circuit 2 is a capacitor C2.
In a preferred embodiment, the charging control circuit 2 further includes a power supply terminal VCC, a winding, a resistor three R5, a capacitor one C2, a transistor two Q105, and a control chip (not shown in the figure), wherein the power supply terminal VCC is connected to the output terminal of the regulating circuit 1.
In the above technical solution, the charging circuit further includes a capacitor C1 and a voltage regulator ZD5, wherein the resistor R5 is connected between the drain and the gate of the transistor Q105, and the source of the transistor Q105 is connected to the control chip for outputting 12V voltage for connection to the control chip.
One end of the voltage regulator tube ZD5 is grounded, and the other end is connected with the grid connection end of the resistor R5 and the triode.
One end of the winding is connected with an inductor L210, a diode D2 and a diode D3 respectively, wherein the diode D3 is located between the capacitor C1 and the capacitor C2.
In a preferred embodiment, the regulating circuit 1 is used for inputting an ac voltage. The input alternating voltage ranges from 90vac to 380 vac.
Preferably, the ac voltage range for the input of the regulating circuit 1 is between 90vac and 380 vac.
Preferably, the control chip is connected with the second triode and used for supplying power to the control chip when the second triode is conducted.
Preferably, the power supply voltage for the control chip is 12V.
While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model.
Claims (8)
1. A high voltage startup circuit, comprising: an adjustment circuit (1) for adjusting an input voltage and outputting a charging current; the charging control circuit (2) is connected with the adjusting circuit (1), is connected with the adjusting circuit (1) and is used for receiving the charging current to charge a charging element (21); the adjusting circuit (1) comprises a voltage input end, a first triode, a semiconductor component (12), a first resistor, a second resistor (11) and a voltage stabilizing diode (13), wherein the drain electrode of the first triode is connected with the voltage input end; the grid electrode of the first triode is connected with one end of the first resistor, the other end of the first resistor is connected with the voltage input end, one end of the semiconductor component (12) is connected with the grid electrode of the first triode, the other end of the semiconductor component is connected between the second resistor (11) and the voltage stabilizing diode (13), and one end, connected with the grid electrode, of the semiconductor component (12) is grounded; the drain electrode of the triode I is connected with one end of the resistor II (11), the other end of the resistor II (11) is connected with the voltage stabilizing diode, the output end of the voltage stabilizing diode (13) is connected with the power supply end of the charging control circuit (2), and the semiconductor component (12) is formed by connecting a plurality of voltage stabilizing tubes in series.
2. The high voltage startup circuit of claim 1, wherein the first resistor consists of three resistors connected in series.
3. A high voltage start-up circuit according to claim 1, characterized in that the charging element (21) in the charge control circuit (2) is a capacitor.
4. The high voltage starting circuit according to claim 1, wherein the charge control circuit (2) further comprises a power supply terminal, a winding, a resistor three, a capacitor one, a transistor two, and a control chip, wherein the power supply terminal is connected to the output terminal of the regulating circuit (1).
5. The high voltage startup circuit according to claim 1, characterized in that the regulation circuit (1) is configured to input an alternating voltage.
6. The high voltage start-up circuit according to claim 5, characterized in that the alternating voltage range used by the regulation circuit (1) for input is between 90vac and 380 vac.
7. The high voltage start-up circuit of claim 4, wherein the control chip is connected to the second transistor for supplying power to the control chip when the second transistor is turned on.
8. The high-voltage starting circuit according to claim 4 or 7, wherein the supply voltage of the control chip is 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121252756.7U CN215580899U (en) | 2021-06-04 | 2021-06-04 | High-voltage starting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121252756.7U CN215580899U (en) | 2021-06-04 | 2021-06-04 | High-voltage starting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215580899U true CN215580899U (en) | 2022-01-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121252756.7U Active CN215580899U (en) | 2021-06-04 | 2021-06-04 | High-voltage starting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215580899U (en) |
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2021
- 2021-06-04 CN CN202121252756.7U patent/CN215580899U/en active Active
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