High-voltage power supply generating circuit based on voltage doubling circuit

Abstract

The utility model relates to a high-voltage power supply generating circuit based on a voltage doubling circuit, and belongs to the technical field of voltage conversion. A pin 7 of the first illumination driving chip, a pin 2 of the first capacitor and a pin 2 of the third capacitor are connected with each other; the cathode of the first diode is connected with the first pin of the first capacitor and the anode of the second diode. The cathode of the second diode is connected with the first pin of the second capacitor and the anode of the third diode. The cathode of the third diode is connected with the first pin of the third capacitor and the anode of the fourth diode. The cathode of the fourth diode is connected with the first pin of the fourth capacitor and the anode of the fifth diode. The cathode of the fifth diode is connected with the first pin of the fifth capacitor and serves as a high-voltage output end, and the second pin of the fifth capacitor is grounded. The circuit greatly reduces the number of voltage doubling circuits, has the advantages of few components and small size, greatly improves the stability of output voltage and the anti-interference capability, and is suitable for high-voltage and low-current products.

Description

Technical Field

[0001] The utility model relates to a high-voltage power supply generating circuit based on a voltage doubling circuit, belonging to the technical field of voltage conversion. Background Art

[0002] Many industrial control products, such as high-voltage ionization sensor products, often use high-voltage, low-current DC power supplies as the driving power supply for the sensors, which can then be used to detect various types of physical information related to the environment. However, the relevant high-voltage power supply is generally generated by high-voltage instruments, which is not only expensive, but also large in size, which is very unfavorable for the miniaturization of high-voltage ionization sensor products, and the products do not have cost advantages. At the same time, although low-voltage DC voltage can also obtain high-voltage output after multi-stage voltage doubling through traditional voltage doubling circuits, more components are used in more voltage doubling circuits, and the output voltage stability and anti-interference ability are also greatly reduced, which is not conducive to improving the detection accuracy and stability of high-voltage ionization sensor products and other similar products that use high-voltage, low-current driving technology. Utility Model Content

[0003] In order to overcome the problems of miniaturization difficulty, low output stability, weak anti-interference ability and high cost of high-voltage and low-current drive technology products, the utility model provides a novel high-voltage power supply generating circuit based on a voltage doubling circuit.

[0004] The utility model is realized by the following technical scheme: a high-voltage power supply generating circuit based on a voltage doubling circuit, characterized in that: it comprises a first lighting driving chip, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor and a fifth capacitor; the 8th pin of the first lighting driving chip is connected to the anode of the first diode, the 2nd pin of the second capacitor and the 2nd pin of the fourth capacitor; the 7th pin of the first lighting driving chip, the 2nd pin of the first capacitor and the 2nd pin of the third capacitor are connected to each other; the cathode of the first diode is connected to the 1st pin of the first capacitor and the anode of the second diode; the cathode of the second diode is connected to the 1st pin of the second capacitor and the anode of the third diode; the cathode of the third diode is connected to the 1st pin of the third capacitor and the anode of the fourth diode; the cathode of the fourth diode is connected to the 1st pin of the fourth capacitor and the anode of the fifth diode; the cathode of the fifth diode is connected to the 1st pin of the fifth capacitor and the anode of the fourth diode; the cathode of the fifth diode is connected to the 1st pin of the fifth capacitor and the anode of the fifth diode; the cathode of the fifth diode is connected to the 1st pin of the fifth capacitor and serves as a high-voltage output terminal, and the 2nd pin of the fifth capacitor is grounded.

[0005] The first lighting driver chip is a lamp lighting driver chip HV859M, and the VA and VB output voltages are in the form of alternating current.

[0006] The voltage at the high-voltage output end is a high-voltage direct current voltage.

[0007] The first diode, the second diode, the third diode, the fourth diode and the fifth diode are high voltage diodes, and the withstand voltage value is greater than the output voltage.

[0008] The first capacitor, the second capacitor, the third capacitor, the fourth capacitor and the fifth capacitor are high voltage capacitors, and the voltage resistance value is greater than the output voltage.

[0009] The beneficial effect of the utility model is that it can boost a relatively low DC voltage to the required high-voltage DC voltage through a driving chip and a voltage doubling circuit. Compared with the traditional direct current voltage doubling to high-voltage output, the patented design greatly reduces the number of voltage doubling circuits. It not only has the advantages of fewer components and smaller size, but also greatly improves the output voltage stability and anti-interference ability. Compared with the solution of high-voltage output of special instruments and meters, the cost advantage is also very prominent, and it is suitable for high-voltage and low-current product applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The utility model is further described below based on the drawings and embodiments.

[0011] Figure 1 It is a circuit schematic diagram of the utility model. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0013] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0014] like Figure 1 A high-voltage power supply generating circuit based on a voltage doubling circuit is shown, comprising a first lighting driver chip U1, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4 and a fifth capacitor C5; the 8th pin of the first lighting driver chip U1 is connected to the anode of the first diode D1, the 2nd pin of the second capacitor C2 and the 2nd pin of the fourth capacitor C4; the 7th pin of the first lighting driver chip U1, the 2nd pin of the first capacitor C1 and the 2nd pin of the third capacitor C3 are connected to each other The cathode of the first diode D1 is connected to pin 1 of the first capacitor C1 and the anode of the second diode D2; the cathode of the second diode D2 is connected to pin 1 of the second capacitor C2 and the anode of the third diode D3; the cathode of the third diode D3 is connected to pin 1 of the third capacitor C3 and the anode of the fourth diode D4; the cathode of the fourth diode D4 is connected to pin 1 of the third capacitor C4 and the anode of the fifth diode D5; the cathode of the fifth diode D5 is connected to pin 1 of the fifth capacitor C5 and serves as a high voltage output terminal, and pin 2 of the fifth capacitor C5 is grounded.

[0015] When the low voltage direct current VCC supplies power to the first lighting driver chip U1, the VA-VB terminal of the first lighting driver chip U1 obtains an AC output voltage referred to as Vab, and the peak-to-peak value of the AC voltage is generally above 100V to reduce the number of voltage doubling circuits and improve the stability of the system voltage doubling; when the Vab voltage is positive, the first capacitor C1 will be charged through the first diode D1, and the voltage across the first capacitor C1 is Vab after the charging is completed; when the Vab voltage is negative, the VA-VB terminal voltage Vab of the first lighting driver chip U1 and the voltage across the first capacitor C1 will charge the second capacitor C2 through the second diode D2, and the voltage across the second capacitor C2 is 2Vab after the charging is completed; when the Vab voltage is positive for the second time, the VA-V The voltage Vab at the B terminal and the voltage 2Vab at both ends of the second capacitor C2 will charge the third capacitor C3 through the third diode D3. After the charging is completed, the voltage across the third capacitor C3 is 3Vab; when the Vab voltage is negative for the second time, the voltage Vab at the VA-VB terminal of the first lighting driver chip U1 and the voltage 3Vab at both ends of the third capacitor C3 will charge the fourth capacitor C4 through the fourth diode D4. After the charging is completed, the voltage across the fourth capacitor C4 is 4Vab; a high-voltage DC voltage H_VCC will be obtained through the fifth diode D5 and the fifth capacitor C5. Because the H_VCC system ground and VB are not in common, the high-voltage DC voltage H_VCC is approximately 1 / 2 of the double voltage, and the effective value and ripple size of the output voltage can be appropriately adjusted by adjusting the capacitance value of the fifth capacitor C5.

[0016] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high voltage power supply generating circuit based on a voltage doubling circuit, characterized in that: It includes a first lighting driver chip, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor and a fifth capacitor; the 8th pin of the first lighting driver chip is connected to the anode of the first diode, the 2nd pin of the second capacitor and the 2nd pin of the fourth capacitor; the 7th pin of the first lighting driver chip, the 2nd pin of the first capacitor and the 2nd pin of the third capacitor are connected to each other; the cathode of the first diode is connected to the 1st pin of the first capacitor and the anode of the second diode; the cathode of the second diode is connected to the 1st pin of the second capacitor and the anode of the third diode; the cathode of the third diode is connected to the 1st pin of the third capacitor and the anode of the fourth diode; the cathode of the fourth diode is connected to the 1st pin of the fourth capacitor and the anode of the fifth diode; the cathode of the fifth diode is connected to the 1st pin of the fifth capacitor and serves as a high-voltage output terminal, and the 2nd pin of the fifth capacitor is grounded.

2. A high voltage power supply generating circuit based on a voltage doubling circuit according to claim 1, characterized in that: The first lighting driver chip is a lamp lighting driver chip HV859M, and the VA and VB output voltages are in the form of alternating current.

3. The high voltage power supply generating circuit based on a voltage doubling circuit according to claim 1, characterized in that: The voltage at the high-voltage output end is a high-voltage direct current voltage.

4. The high voltage power supply generating circuit based on a voltage doubling circuit according to claim 1, characterized in that: The first diode, the second diode, the third diode, the fourth diode and the fifth diode are high voltage diodes, and the withstand voltage value is greater than the output voltage.

5. The high voltage power supply generating circuit based on a voltage doubling circuit according to claim 1, characterized in that: The first capacitor, the second capacitor, the third capacitor, the fourth capacitor and the fifth capacitor are high voltage capacitors, and the voltage resistance value is greater than the output voltage.

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