CN202907251U - An adjustable voltage stabilized power supply circuit and a lamp - Google Patents
An adjustable voltage stabilized power supply circuit and a lamp Download PDFInfo
- Publication number
- CN202907251U CN202907251U CN 201220605594 CN201220605594U CN202907251U CN 202907251 U CN202907251 U CN 202907251U CN 201220605594 CN201220605594 CN 201220605594 CN 201220605594 U CN201220605594 U CN 201220605594U CN 202907251 U CN202907251 U CN 202907251U
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- voltage stabilizing
- stabilizing chip
- power supply
- filter capacitor
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Abstract
The utility model is suitable for a lamps and lanterns field especially relates to an adjustable constant voltage power supply circuit and lamps and lanterns. In the utility model, the adjustable voltage-stabilized power supply circuit is composed of independent components, and the anode and the cathode of the protection diode are respectively connected with the output pin and the input pin of the voltage-stabilized chip, so that when the output end of the adjustable voltage-stabilized power supply circuit has reverse high voltage, the reverse high voltage is directly reduced through the protection diode, thereby protecting the voltage-stabilized chip; in addition, when the voltage of the slide rheostat is changed greatly, the filter capacitor can be adopted to filter the harmonic waves at the two ends of the slide rheostat, so that the voltage stabilizing chip is protected.
Description
Technical field
The utility model belongs to field of light fittings, relates in particular to a kind of adjustable voltage-stabilized source and light fixture.
Background technology
Development along with science and technology, New Products ﹠ New Technology is constantly reformed, various light fixtures have been deep in daily life and the work, various lamp driving circuits have also appearred thereupon, in order to satisfy the supply voltage demand of different lamp driving circuits, prior art provides a kind of adjustable voltage voltage stabilizing circuit, but, if when the lamp driving circuit that connects brings out now large voltage, the reverse voltage of the output of adjustable voltage voltage stabilizing circuit can burn the voltage stabilizing chip, has affected the normal power supply of adjustable voltage circuit.
The utility model content
The purpose of this utility model is to provide adjustable voltage-stabilized source, when the reverse voltage of protection threshold value of voltage stabilizing chip occurring exceeding with the output that solves the adjustable voltage voltage stabilizing circuit, and the problem of burning the voltage stabilizing chip in the voltage stabilizing circuit.
The utility model is achieved in that a kind of adjustable voltage-stabilized source, and the input of described adjustable voltage-stabilized source and output connect respectively DC power supply and load driving circuits, and described adjustable voltage-stabilized source comprises:
Filter capacitor C1, filter capacitor C2, voltage stabilizing chip U1, divider resistance R1, variable resistor R2 and protection diode D1;
The input pin VIN of described voltage stabilizing chip U1 connects described DC power supply; the ground pin GND of described voltage stabilizing chip U1 connects the first end of variable resistor R2; the output pin VOUT of described voltage stabilizing chip U1 connects described load driving circuits; the positive pole of described filter capacitor C1 and negative pole connect respectively input VIN and the ground of voltage stabilizing chip U1; the second end ground connection of described variable resistor R2; described divider resistance R1 is connected between the ground pin GND of the output pin VOUT of described voltage stabilizing chip U1 and described voltage stabilizing chip U1; the positive pole of described filter capacitor C2 and negative pole connect respectively output VOUT and the ground of described voltage stabilizing chip U1, and the anode of described protection diode D1 and negative electrode meet respectively output pin VOUT and the input pin VIN of described voltage stabilizing chip U1.
Further, described adjustable voltage-stabilized source also comprises:
Filter capacitor C3, the positive pole of described filter capacitor C3 and negative pole connect respectively the first end of described variable resistor R2 and the second end of described variable resistor R2.
Another purpose of the present utility model is to provide a kind of light fixture, described light fixture comprises load driving circuits, described light fixture also comprises adjustable voltage-stabilized source, the input of described adjustable voltage-stabilized source and output connect respectively DC power supply and load driving circuits, and described adjustable voltage-stabilized source comprises:
Filter capacitor C1, filter capacitor C2, voltage stabilizing chip U1, divider resistance R1, variable resistor R2 and protection diode D1;
The input pin VIN of described voltage stabilizing chip U1 connects described DC power supply; the ground pin GND of described voltage stabilizing chip U1 connects the first end of variable resistor R2; the output pin VOUT of described voltage stabilizing chip U1 connects described load driving circuits; the positive pole of described filter capacitor C1 and negative pole connect respectively input VIN and the ground of voltage stabilizing chip U1; the second end ground connection of described variable resistor R2; described divider resistance R1 is connected between the ground pin GND of the output pin VOUT of described voltage stabilizing chip U1 and described voltage stabilizing chip U1; the positive pole of described filter capacitor C2 and negative pole connect respectively output VOUT and the ground of described voltage stabilizing chip U1, and the anode of described protection diode D1 and negative electrode meet respectively output pin VOUT and the input pin VIN of described voltage stabilizing chip U1.
Further, described adjustable voltage-stabilized source also comprises:
Filter capacitor C3, the positive pole of described filter capacitor C3 and negative pole connect respectively the first end of described variable resistor R2 and the second end of described variable resistor R2.
In the utility model, described adjustable voltage-stabilized source all adopts free-standing components and parts to consist of, output pin and input pin that anode by will protecting diode and negative electrode connect respectively described voltage stabilizing chip, when reverse high voltage appears in the output of described adjustable voltage-stabilized source, described reverse high voltage directly carries out step-down through the overprotection diode, thereby has protected described voltage stabilizing chip; In addition, when large the variation appears in the voltage of slide rheostat, can adopt filter capacitor that the harmonic wave at slide rheostat two ends is carried out filtering, protection voltage stabilizing chip.
Description of drawings
Fig. 1 is the circuit structure diagram of the adjustable voltage-stabilized source that provides of the utility model the first embodiment;
Fig. 2 is the circuit structure diagram of the adjustable voltage-stabilized source that provides of the utility model the second embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Fig. 1 shows the circuit structure of the adjustable voltage-stabilized source that the utility model the first embodiment provides, and for convenience of explanation, only shows the part relevant with the utility model embodiment, and details are as follows.
Adjustable voltage-stabilized source, the input of described adjustable voltage-stabilized source and output connect respectively DC power supply and load driving circuits, and described adjustable voltage-stabilized source comprises:
Filter capacitor C1, filter capacitor C2, voltage stabilizing chip U1, divider resistance R1, variable resistor R2 and protection diode D1;
The input pin VIN of described voltage stabilizing chip U1 connects described DC power supply; the ground pin GND of described voltage stabilizing chip U1 connects the first end of variable resistor R2; the output pin VOUT of described voltage stabilizing chip U1 connects described load driving circuits; the positive pole of described filter capacitor C1 and negative pole connect respectively input VIN and the ground of voltage stabilizing chip U1; the second end ground connection of described variable resistor R2; described divider resistance R1 is connected between the ground pin GND of the output pin VOUT of described voltage stabilizing chip U1 and described voltage stabilizing chip U1; the positive pole of described filter capacitor C2 and negative pole connect respectively output VOUT and the ground of described voltage stabilizing chip U1, and the anode of described protection diode D1 and negative electrode meet respectively output pin VOUT and the input pin VIN of described voltage stabilizing chip U1.
Fig. 2 shows the circuit structure of the adjustable voltage-stabilized source that the utility model the second embodiment provides, and for convenience of explanation, only shows the part relevant with the utility model embodiment, and details are as follows.
As the utility model one embodiment, described adjustable voltage-stabilized source also comprises:
Filter capacitor C3, the positive pole of described filter capacitor C3 and negative pole connect respectively the first end of described variable resistor R2 and the second end of described variable resistor R2.
The below adopts voltage stabilizing chip LM317 and protection diode D1 to adopt protection diode IN4148 as example take voltage stabilizing chip U1, and the operation principle of adjustable voltage-stabilized source is described:
Filter capacitor C1 in the described adjustable voltage-stabilized source carries out filtering to the d. c. voltage signal of the input input of described adjustable voltage-stabilized source, to input through filtered voltage the input pin VIN of described voltage stabilizing chip LM317, because be connected on the output of described adjustable voltage-stabilized source after described divider resistance R1 and the described variable resistor R2 series connection, by regulating the resistance of described variable resistor R2, change the magnitude of voltage of the ground pin GND of described voltage stabilizing chip LM317, thereby, regulate the magnitude of voltage of the output pin VOUT of described voltage stabilizing chip LM317, by described filter capacitor C2 the output voltage signal of described voltage stabilizing chip LM317 is carried out filtering, then filtered output voltage is offered described load driving circuits; Oppositely input to the output of described adjustable voltage-stabilized source for fear of the high voltage of load driving circuits, burn described voltage stabilizing chip LM317, the output pin VOUT of described voltage stabilizing chip LM317 and input pin VIN connect respectively anode and the negative electrode of protection diode IN4148, allow the high voltage of output of described adjustable voltage-stabilized source behind overprotection diode IN4148, carry out step-down, thereby reach the purpose of protection voltage stabilizing chip LM317; When large the variation occurring for fear of the voltage of slide rheostat; the situation that harmonic wave burns voltage stabilizing chip LM317 appears; the first end of described variable resistance R2 and the second end connect respectively anode and the negative electrode of described filter capacitor C3, thus the filtering harmonic wave, protection voltage stabilizing chip LM317.
As shown in Figures 1 and 2, the utility model also provides a kind of light fixture, described light fixture comprises load driving circuits, described light fixture also comprises adjustable voltage-stabilized source, the input of described adjustable voltage-stabilized source and output connect respectively DC power supply and load driving circuits, and described adjustable voltage-stabilized source comprises:
Filter capacitor C1, filter capacitor C2, voltage stabilizing chip U1, divider resistance R1, variable resistor R2 and protection diode D1;
The input pin VIN of described voltage stabilizing chip U1 connects described DC power supply; the ground pin GND of described voltage stabilizing chip U1 connects the first end of variable resistor R2; the output pin VOUT of described voltage stabilizing chip U1 connects described load driving circuits; the positive pole of described filter capacitor C1 and negative pole connect respectively input VIN and the ground of voltage stabilizing chip U1; the second end ground connection of described variable resistor R2; described divider resistance R1 is connected between the ground pin GND of the output pin VOUT of described voltage stabilizing chip U1 and described voltage stabilizing chip U1; the positive pole of described filter capacitor C2 and negative pole connect respectively output VOUT and the ground of described voltage stabilizing chip U1, and the anode of described protection diode D1 and negative electrode meet respectively output pin VOUT and the input pin VIN of described voltage stabilizing chip U1.
Further, described adjustable voltage-stabilized source also comprises:
Filter capacitor C3, the positive pole of described filter capacitor C3 and negative pole connect respectively the first end of described variable resistor R2 and the second end of described variable resistor R2.
In the utility model embodiment, described adjustable voltage-stabilized source all adopts free-standing components and parts to consist of, output pin and input pin that anode by will protecting diode IN4148 and negative electrode meet respectively described voltage stabilizing chip LM317, when reverse high voltage appears in the output of described adjustable voltage-stabilized source, described reverse high voltage directly carries out step-down through overprotection diode IN4148, thereby has protected described voltage stabilizing chip LM317; In addition, when large the variation appears in the voltage of slide rheostat, can adopt filter capacitor C3 that the harmonic wave at slide rheostat two ends is carried out filtering, protection voltage stabilizing chip.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220605594 CN202907251U (en) | 2012-11-15 | 2012-11-15 | An adjustable voltage stabilized power supply circuit and a lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220605594 CN202907251U (en) | 2012-11-15 | 2012-11-15 | An adjustable voltage stabilized power supply circuit and a lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202907251U true CN202907251U (en) | 2013-04-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220605594 Expired - Lifetime CN202907251U (en) | 2012-11-15 | 2012-11-15 | An adjustable voltage stabilized power supply circuit and a lamp |
Country Status (1)
| Country | Link |
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| CN (1) | CN202907251U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107070261A (en) * | 2016-11-28 | 2017-08-18 | 中核核电运行管理有限公司 | The high-performance electric source module that nuclear power station reactor core Nuclear measurement system is used |
| CN108459218A (en) * | 2018-02-05 | 2018-08-28 | 天地融电子（天津）有限公司 | A kind of test circuit |
-
2012
- 2012-11-15 CN CN 201220605594 patent/CN202907251U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107070261A (en) * | 2016-11-28 | 2017-08-18 | 中核核电运行管理有限公司 | The high-performance electric source module that nuclear power station reactor core Nuclear measurement system is used |
| CN108459218A (en) * | 2018-02-05 | 2018-08-28 | 天地融电子（天津）有限公司 | A kind of test circuit |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130424 |