CN217084047U - Power supply voltage conditioning circuit of pressure sensor - Google Patents
Power supply voltage conditioning circuit of pressure sensor Download PDFInfo
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- CN217084047U CN217084047U CN202220609233.1U CN202220609233U CN217084047U CN 217084047 U CN217084047 U CN 217084047U CN 202220609233 U CN202220609233 U CN 202220609233U CN 217084047 U CN217084047 U CN 217084047U
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- power supply
- effect transistor
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- pressure sensor
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Abstract
The utility model discloses a pressure sensor supply voltage conditioning circuit, including conditioning chip, power supply input, field effect transistor and output, the field effect transistor drain electrode is connected with the power supply input, the field effect transistor source electrode is connected with the output, it has the control end to condition the chip, it is connected with the field effect transistor grid to condition the chip control end to control field effect transistor break-make. The pressure sensor power supply system is low in cost, wide in application range and more reliable in power supply to the pressure sensor.
Description
Technical Field
The utility model belongs to the technical field of the detection circuitry technique and specifically relates to a pressure sensor supply voltage conditioning circuit.
Background
The pressure sensor generally adopts a 5V power supply conditioning circuit. When the power supply voltage is 24V or even higher, the pressure sensor fails, and if a voltage reduction chip is adopted at a power supply end, the cost of the pressure sensor is obviously increased, so that the current pressure sensor is only suitable for a 5V power supply environment, the application range is limited, and the detection efficiency is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a not enough to prior art, the utility model provides a pressure sensor supply voltage conditioning circuit, its is with low costs, and application scope is wide, and is more reliable to the pressure sensor power supply.
In order to achieve the above object, the utility model provides a pressure sensor supply voltage conditioning circuit, including conditioning chip, power supply input, field effect transistor and output, the field effect transistor drain electrode is connected with the power supply input, the field effect transistor source electrode is connected with the output, conditioning chip has the control end, it is connected with the field effect transistor grid to condition the chip control end to control the field effect transistor break-make.
The beneficial effect who so sets up is: according to the arrangement, a high-voltage power supply is input from a drain electrode of the field-effect tube, the field-effect tube preferably adopts an N-channel depletion type, and then the N-channel depletion type is output from a source electrode to supply power to the conditioning chip, the conditioning chip integrates a field-effect tube controller and is used for dynamically controlling the on and off of the N-channel depletion type field-effect tube, so that the high voltage input by the N-channel depletion type field-effect tube is converted into stable 5V voltage and is output to the conditioning chip, the power supply range supports 5.5V to 36V, the cost is low, and the application range is wide. Preferably, the conditioning chip adopts NSC9260X, and the N-channel depletion type field effect transistor adopts BSS 169. When the power supply voltage of the conditioning chip rises from 0V to more than 5V, the field effect transistor controller integrated with the conditioning chip controls the N-channel depletion type field effect transistor to be closed, and the power supply to the conditioning chip is cut off; when the power supply voltage of the conditioning chip is lower than 5V, the conditioning chip integrated field effect transistor controller controls the conduction of the N-channel depletion type field effect transistor to supply power to the conditioning chip, so that the stable power supply of the pressure sensor is realized at very low cost through dynamic adjustment, and the pressure sensor has the characteristics of wide working voltage range, high-voltage power supply support, long service life and high reliability.
As a further setting of the utility model, it still has earthing terminal and power end to take care of the chip, the power end is connected with the power supply input, still be connected with first electric capacity between earthing terminal and the power end.
The beneficial effect who so sets up is: through setting up like this, further promote the steady voltage effect to taking care of the chip, guarantee that pressure is stable, can effectual filtering, promote holistic reliability.
As a further setting of the utility model, the field effect transistor source electrode passes through electrostatic suppression diode ground connection, and this electrostatic suppression diode has the second electric capacity still in parallel.
The beneficial effect who so sets up is: by such an arrangement, static electricity can be effectively suppressed, and the reliability of use of the entire circuit can be improved.
As a further setting of the utility model, the conditioning chip is also provided with a detection end, and the detection end is connected with the output end.
The beneficial effect who so sets up is: through the arrangement, the numerical value is effectively fed back, and the reliability of detection control of the conditioning chip is improved.
Drawings
Fig. 1 is a schematic diagram of a layout structure according to an embodiment of the present invention.
Detailed Description
The embodiment of the pressure sensor supply voltage conditioning circuit of the utility model is shown in figure 1: the field-effect transistor 1 source electrode is connected with the output, it has the control end to nurse chip 2, nurse chip 2 control end and field-effect transistor 1 grid are connected to control field-effect transistor 1 break-make. The beneficial effect who so sets up is: according to the arrangement, a high-voltage power supply is input from the drain electrode of the field-effect tube 1, the field-effect tube 1 preferably adopts an N-channel depletion type, and then the N-channel depletion type power supply is output from the source electrode to the conditioning chip 2, the conditioning chip 2 integrates a field-effect tube 1 controller and is used for dynamically controlling the conduction and the closing of the N-channel depletion type field-effect tube 1, so that the high voltage input by the N-channel depletion type field-effect tube 1 is converted into stable 5V voltage to be output to the conditioning chip 2, the power supply range supports 5.5V to 36V, the cost is low, and the application range is wide. Preferably, the conditioning chip 2 adopts NSC9260X, and the N-channel depletion type field effect transistor 1 adopts BSS 169. When the power supply voltage of the conditioning chip 2 rises from 0V to more than 5V, the field effect tube 1 controller integrated with the conditioning chip 2 controls the N-channel depletion type field effect tube 1 to be closed, and the power supply to the conditioning chip 2 is cut off; when the power supply voltage of the conditioning chip 2 is lower than 5V, the field effect transistor 1 controller integrated with the conditioning chip 2 controls the conduction of the N-channel depletion type field effect transistor 1 to supply power to the conditioning chip 2, so that the stable power supply of the pressure sensor is realized at very low cost through dynamic adjustment, and the pressure sensor has the characteristics of wide working voltage range, high-voltage power supply support, long service life and high reliability.
As a further setting of the utility model, it still has earthing terminal and power end to take care of chip 2, the power end is connected with the power supply input, still be connected with first electric capacity 3 between earthing terminal and the power end. The beneficial effect who so sets up is: through setting up like this, further promote the steady voltage effect to adjustment chip 2, guarantee that pressure is stable, can effectual filtering, promote holistic reliability.
As a further configuration of the present invention, the source of the field effect transistor 1 is grounded through the static suppression diode 4, and the static suppression diode 4 is further connected in parallel with the second capacitor 5. The beneficial effect who so sets up is: by such an arrangement, static electricity can be effectively suppressed, and the reliability of use of the entire circuit can be improved.
As a further configuration of the present invention, the conditioning chip 2 further includes a detection end, and the detection end is connected to the output end. The beneficial effect who so sets up is: through the arrangement, the numerical value is effectively fed back, and the reliability of detection control of the conditioning chip 2 is improved.
The above examples are only one of the preferred embodiments of the present invention, and the general changes and substitutions performed by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.
Claims (4)
1. A pressure sensor supply voltage conditioning circuit is characterized in that: the field effect transistor power supply device comprises a conditioning chip, a power supply input end, a field effect transistor and an output end, wherein a drain electrode of the field effect transistor is connected with the power supply input end, a source electrode of the field effect transistor is connected with the output end, the conditioning chip is provided with a control end, and the control end of the conditioning chip is connected with a grid electrode of the field effect transistor so as to control the on-off of the field effect transistor.
2. The pressure sensor supply voltage conditioning circuit of claim 1, wherein: the conditioning chip is also provided with a grounding end and a power supply end, the power supply end is connected with the power supply input end, and a first capacitor is further connected between the grounding end and the power supply end.
3. The pressure sensor supply voltage conditioning circuit of claim 1, wherein: the source electrode of the field effect transistor is grounded through an electrostatic suppression diode, and the electrostatic suppression diode is connected with a second capacitor in parallel.
4. The pressure sensor supply voltage conditioning circuit of claim 1, wherein: the conditioning chip further comprises a detection end, and the detection end is connected with the output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220609233.1U CN217084047U (en) | 2022-03-18 | 2022-03-18 | Power supply voltage conditioning circuit of pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220609233.1U CN217084047U (en) | 2022-03-18 | 2022-03-18 | Power supply voltage conditioning circuit of pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217084047U true CN217084047U (en) | 2022-07-29 |
Family
ID=82550257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220609233.1U Active CN217084047U (en) | 2022-03-18 | 2022-03-18 | Power supply voltage conditioning circuit of pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217084047U (en) |
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2022
- 2022-03-18 CN CN202220609233.1U patent/CN217084047U/en active Active
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