CN203167360U - High efficiency environmental protection LED high voltage linear constant current driving circuit - Google Patents
High efficiency environmental protection LED high voltage linear constant current driving circuit Download PDFInfo
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- CN203167360U CN203167360U CN 201320133821 CN201320133821U CN203167360U CN 203167360 U CN203167360 U CN 203167360U CN 201320133821 CN201320133821 CN 201320133821 CN 201320133821 U CN201320133821 U CN 201320133821U CN 203167360 U CN203167360 U CN 203167360U
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Abstract
The utility model relates to a high efficiency environmental protection LED high voltage linear constant current driving circuit and solves technical problems of relatively high requirements on resources, non-environmental-protection performance and low efficiency existing in the prior art. According to a technical scheme, the high efficiency environmental protection LED high voltage linear constant current driving circuit is connected with a power source, provides power for a load and comprises a rectifier bridge circuit, a filter circuit, a main control circuit, a reference voltage circuit, a constant current adjusting circuit and an output control circuit, wherein an input end of the rectifier bridge circuit is connected with the power source, an output end of the rectifier bridge circuit is connected with the reference voltage circuit through the filter circuit, a reference output end of the reference voltage circuit is connected with a reference voltage input end of the main control circuit, a power source end of the reference voltage circuit is connected with a power source end of the main control circuit, a feedback end of the main control circuit is connected with a grounding end of the main control circuit through the constant current adjusting circuit, and an output end of the main control circuit is connected with the load through the output control circuit. The high efficiency environmental protection LED high voltage linear constant current driving circuit has advantages of high efficiency and environmental protection.
Description
Technical field
The utility model relates to a kind of power circuit, is specifically related to a kind of linear constant-current drive circuit of LED high pressure of high-efficiency environment friendly.
Background technology
Linear constant-current drive circuit, general alternating current circuit is converted to DC circuit, always be drive circuit commonly used in present life and work, can be used for DC equipment such as driving LED, what but present linear constant-current drive circuit generally all adopted is that common IC chip drives, the size of current that drives is controlled by the IC chip, and the driving fan-out capability of IC chip is limited, can't export the linear constant current drive current of high pressure, causes, now in order to obtain the linear constant current drive current of high pressure, can adopt the mode of polylith IC chip stack to export, like this, can cause again, too much use the IC chip, higher to resource requirement, unfavorable to environmental protection, and, efficient is not high yet, and the linear constant-current drive circuit of LED high pressure of therefore producing and develop a kind of high-efficiency environment friendly is imperative.
Chinese patent notification number: CN202310207U, open day on July 14th, 2012, the linear LED constant-current drive circuit of a kind of high pressure is disclosed, it is characterized in that: the electric current that detects the emitter resistance of the Darlington transistor of being formed by two high-voltage tubes by the low reference pin (R) of three ends voltage stabilizing didoe able to programme, the negative electrode (K) that utilizes three ends voltage stabilizing didoe able to programme to the line impedance of anode (A) is subjected to reference to the voltage-controlled characteristic of pin (R), adjust the base current of the high-voltage three-pole pipe of driving LED, make the driving current constant of LED in set point.Owing to use the form of two high-voltage three-pole pipe group Darlington transistors, so the electric current that its base stage needs is very little, the power that consumes at inclined to one side resistance is just very little like this, makes that the efficient of whole circuit is very high.But still there is too much application IC chip in this technical scheme, and is higher to resource requirement, unfavorable to environmental protection, and efficient is not high problem also.
The utility model content
The purpose of this utility model is to solve in the prior art to exist too much uses the IC chip, higher to resource requirement, unfavorable to environmental protection, and efficient is not high problem also, and a kind of linear constant-current drive circuit of LED high pressure of high-efficiency environment friendly is provided.
The technical scheme that its technical problem that solves the utility model adopts is: the linear constant-current drive circuit of a kind of LED high pressure of high-efficiency environment friendly, connect power supply, load is powered, comprise rectifier circuit, filter circuit, governor circuit, reference voltage circuit, constant flow regulation circuit and output control circuit, described rectifier circuit input is connected with power supply, the output of rectifier circuit is electrically connected with reference voltage circuit by filter circuit, the benchmark output of reference voltage circuit is connected with the reference voltage input of described governor circuit, the power end of reference voltage circuit is connected with described governor circuit power end, the feedback end of described governor circuit is connected with the earth terminal of governor circuit by the constant flow regulation circuit, and the output of described governor circuit is connected with described load by output control circuit.During the utility model work, at first carry out rectification by rectifier bridge, filter circuit carries out filtering, output services voltage and reference voltage are to governor circuit, governor circuit output control electric current is to output control circuit, field effect transistor in the output control circuit changes the on off state of self according to the electric current of governor circuit output, load in the utility model is directly powered by rectifier circuit, simultaneously, load also is connected with field effect transistor, therefore, the on off state that has changed field effect transistor just can directly be controlled the size of the electric current that flows through field effect transistor, so switching value of control field effect transistor, can reach the effect that the linear constant current of high pressure drives, simultaneously, the utility model is provided with the constant flow regulation circuit as feedback, particularly variable-resistance setting makes the utility model strengthen governor circuit has reached high-efficiency environment friendly to the control of field effect transistor effect by feedback.
As preferably; described governor circuit comprises power supply circuits; logic control circuit; protective circuit; Drive and Control Circuit; compensation and startup control circuit and field effect transistor Q1 and amplifier; the input of described power supply circuits is connected with the power end of described reference voltage circuit; logic control circuit; protective circuit; Drive and Control Circuit; compensation and startup control circuit are powered by power supply circuits; the input of described logic control circuit is connected with the benchmark output of described reference voltage circuit; the control end of described logic control circuit is connected with described protective circuit; the output of described logic control circuit is connected with the control end of described driving control device; the input of driving control device is connected with the output of described amplifier; the positive input terminal of amplifier is connected with the startup control circuit with described compensation; the negative input end of amplifier is connected with described constant flow regulation circuit as the feedback end of governor circuit; the output of Drive and Control Circuit is connected with the grid of described field effect transistor Q1; the source electrode of described field effect transistor Q1 is connected with the negative input end of described amplifier, and the drain electrode of described field effect transistor Q1 is connected with described load by output control circuit as the output of governor circuit.
As preferably, described field effect transistor Q1 is N channel field-effect pipe.
As preferably, described rectifier circuit comprises diode D1, diode D2, diode D3 and diode D4, described filter circuit comprises capacitor C 1, the anode of diode D1 is connected with described power supply, the anode of diode D1 is connected with the negative electrode of described diode D3, the anode of diode D2 is connected with described power supply, the negative electrode of diode D2 is connected with the negative electrode of described diode D1, the negative electrode of diode D2 also is connected with the positive pole of described capacitor C 1, the anode of diode D2 is connected with the negative electrode of diode D4, the anode of diode D4 is connected with the anode of described diode D3, and the anode of diode D4 is connected with the negative pole of described capacitor C 1.
As preferably, described reference voltage circuit comprises resistance R 1, resistance R 2, resistance R 3 and capacitor C 2, first conduction terminal of described resistance R 1 is connected with the positive pole of capacitor C 1, second conduction terminal of resistance R 1 is connected with first conduction terminal of first conduction terminal of resistance R 2, capacitor C 2 and the power supply circuits of governor circuit, second conduction terminal of resistance R 2 is connected with the reference voltage input of governor circuit, second conduction terminal of described resistance R 2 also is connected with the earth terminal of governor circuit by resistance R 3, and second conduction terminal of capacitor C 2 is connected with the earth terminal of governor circuit.
As preferably, described constant flow regulation circuit comprises power transformation resistance R5 and resistance R 4, and first conduction terminal of described power transformation resistance R5 is connected with the feedback end of described governor circuit, and the power transformation end that described power transformation hinders R5 passes through resistance R 4 and is connected with the earth terminal of governor circuit.
As preferably, described output control circuit comprises field effect transistor Q2, resistance R 6 and resistance R 7, first conduction terminal of described resistance R 6 is connected with the output of described governor circuit, second conduction terminal of described resistance R 6 is connected with the grid of described field effect transistor Q2, the source electrode of described field effect transistor Q2 is connected with the power transformation end of described power transformation resistance R5, the source drain of described field effect transistor Q2 is connected with described load negative pole, first end of described resistance R 7 is connected with second end of described resistance R 6, second end of described resistance R 7 is connected with the output of described rectifier bridge, and second end of described resistance R 7 also is connected with the positive pole of described load.
As preferably, described field effect transistor Q2 is N channel field-effect pipe.
As preferably, described load is LED.
As preferably, described power supply circuits also include the calculating voltage delivery outlet, and described calculating voltage delivery outlet is connected with the positive input terminal of described amplifier.
The beneficial effects of the utility model are: during the utility model work, at first carry out rectification by rectifier bridge, filter circuit carries out filtering, output services voltage and reference voltage are to governor circuit, governor circuit output control electric current is to output control circuit, field effect transistor in the output control circuit changes the on off state of self according to the electric current of governor circuit output, load in the utility model is directly powered by rectifier circuit, simultaneously, load also is connected with field effect transistor, therefore, the on off state that has changed field effect transistor just can directly be controlled the size of the electric current that flows through field effect transistor, so switching value of control field effect transistor, can reach the effect that the linear constant current of high pressure drives, simultaneously, the utility model is provided with the constant flow regulation circuit as feedback, particularly variable-resistance setting makes the utility model strengthen governor circuit has reached high-efficiency environment friendly to the control of field effect transistor effect by feedback.
Description of drawings
Circuit theory diagrams when Fig. 1 is a kind of main power source power supply of the present utility model;
Fig. 2 is a kind of circuit theory diagrams of governor circuit in the utility model.
Among the figure: 1, power supply circuits, 2, protective circuit, 3, logic control circuit, 4, compensation and start control circuit, 5, Drive and Control Circuit.
Embodiment
Below by specific embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment:
The linear constant-current drive circuit (referring to accompanying drawing 1) of a kind of LED high pressure of high-efficiency environment friendly, comprise rectifier circuit, filter circuit, governor circuit, reference voltage circuit, constant flow regulation circuit and output control circuit, described rectifier circuit input is connected with power supply, the output of rectifier circuit is electrically connected with reference voltage circuit by filter circuit, the benchmark output of reference voltage circuit is connected with the reference voltage input of described governor circuit, the power end of reference voltage circuit is connected with described governor circuit power end, the feedback end of described governor circuit is connected with the earth terminal of governor circuit by the constant flow regulation circuit, and the output of described governor circuit is connected with described load by output control circuit.Described governor circuit comprises power supply circuits 1; logic control circuit 3; protective circuit 2; Drive and Control Circuit 5; compensation and startup control circuit 4 and field effect transistor Q1 and amplifier; the input of described power supply circuits is connected with the power end of described reference voltage circuit; logic control circuit; protective circuit; Drive and Control Circuit; compensation and startup control circuit are powered by power supply circuits; the input of described logic control circuit is connected with the benchmark output of described reference voltage circuit; the control end of described logic control circuit is connected with described protective circuit; the output of described logic control circuit is connected with the control end of described driving control device; the input of driving control device is connected with the output of described amplifier; the positive input terminal of amplifier is connected with the startup control circuit with described compensation; the negative input end of amplifier is connected with described constant flow regulation circuit as the feedback end of governor circuit; the output of Drive and Control Circuit is connected with the grid of described field effect transistor Q1; the source electrode of described field effect transistor Q1 is connected with the negative input end of described amplifier, and the drain electrode of described field effect transistor Q1 is connected with described load by output control circuit as the output of governor circuit.Described field effect transistor Q1 is N channel field-effect pipe.Described rectifier circuit comprises diode D1, diode D2, diode D3 and diode D4, described filter circuit comprises capacitor C 1, the anode of diode D1 is connected with described power supply, the anode of diode D1 is connected with the negative electrode of described diode D3, the anode of diode D2 is connected with described power supply, the negative electrode of diode D2 is connected with the negative electrode of described diode D1, the negative electrode of diode D2 also is connected with the positive pole of described capacitor C 1, the anode of diode D2 is connected with the negative electrode of diode D4, the anode of diode D4 is connected with the anode of described diode D3, and the anode of diode D4 is connected with the negative pole of described capacitor C 1.Described reference voltage circuit comprises resistance R 1, resistance R 2, resistance R 3 and capacitor C 2, first conduction terminal of described resistance R 1 is connected with the positive pole of capacitor C 1, second conduction terminal of resistance R 1 is connected with first conduction terminal of first conduction terminal of resistance R 2, capacitor C 2 and the power supply circuits of governor circuit, second conduction terminal of resistance R 2 is connected with the reference voltage input of governor circuit, second conduction terminal of described resistance R 2 also is connected with the earth terminal of governor circuit by resistance R 3, and second conduction terminal of capacitor C 2 is connected with the earth terminal of governor circuit.Described constant flow regulation circuit comprises power transformation resistance R5 and resistance R 4, and first conduction terminal of described power transformation resistance R5 is connected with the feedback end of described governor circuit, and the power transformation end of described power transformation resistance R5 is connected with the earth terminal of governor circuit by resistance R 4.Described output control circuit comprises field effect transistor Q2, resistance R 6 and resistance R 7, first conduction terminal of described resistance R 6 is connected with the output of described governor circuit, second conduction terminal of described resistance R 6 is connected with the grid of described field effect transistor Q2, the source electrode of described field effect transistor Q2 is connected with the power transformation end of described power transformation resistance R5, the source drain of described field effect transistor Q2 is connected with described load negative pole, first end of described resistance R 7 is connected with second end of described resistance R 6, second end of described resistance R 7 is connected with the output of described rectifier bridge, and second end of described resistance R 7 also is connected with the positive pole of described load.Described field effect transistor Q2 is N channel field-effect pipe.Described power supply circuits also include the calculating voltage delivery outlet, and described calculating voltage delivery outlet is connected with the positive input terminal of described amplifier.Described load is LED.
During present embodiment work, at first carry out rectification by rectifier bridge, filter circuit carries out filtering, output services voltage and reference voltage are to governor circuit, governor circuit is through inner startup compensation, temperature compensation compensation, by accurate logic control, output control electric current is to output control circuit, and the field effect transistor in the output control circuit changes the on off state of self according to the electric current of governor circuit output; Load input terminal in the present embodiment is directly powered by rectifier circuit, because load input terminal is directly powered by rectifier circuit, so can directly import high electric current by rectifier bridge, simultaneously, load also is connected with field effect transistor, therefore, the on off state that has changed field effect transistor just can directly be controlled the size of the electric current that flows through field effect transistor, so switching value of control field effect transistor, can reach the effect that the linear constant current of high pressure drives, simultaneously, present embodiment is provided with the constant flow regulation circuit as feedback, particularly variable-resistance setting makes present embodiment strengthen governor circuit has reached high-efficiency environment friendly to the control of field effect transistor effect by feedback.
Above-described embodiment is a kind of preferable scheme of the present utility model, is not that the utility model is done any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim puts down in writing.
Claims (10)
1. the linear constant-current drive circuit of the LED high pressure of a high-efficiency environment friendly, connect power supply, load is powered, it is characterized in that: comprise rectifier circuit, filter circuit, governor circuit, reference voltage circuit, constant flow regulation circuit and output control circuit, described rectifier circuit input is connected with power supply, the output of rectifier circuit is electrically connected with reference voltage circuit by filter circuit, the benchmark output of reference voltage circuit is connected with the reference voltage input of described governor circuit, the power end of reference voltage circuit is connected with described governor circuit power end, the feedback end of described governor circuit is connected with the earth terminal of governor circuit by the constant flow regulation circuit, and the output of described governor circuit is connected with described load by output control circuit.
2. the linear constant-current drive circuit of the LED high pressure of high-efficiency environment friendly according to claim 1; it is characterized in that: described governor circuit comprises power supply circuits; logic control circuit; protective circuit; Drive and Control Circuit; compensation and startup control circuit and field effect transistor Q1 and amplifier; the input of described power supply circuits is connected with the power end of described reference voltage circuit; logic control circuit; protective circuit; Drive and Control Circuit; compensation and startup control circuit are powered by power supply circuits; the input of described logic control circuit is connected with the benchmark output of described reference voltage circuit; the control end of described logic control circuit is connected with described protective circuit; the output of described logic control circuit is connected with the control end of described driving control device; the input of driving control device is connected with the output of described amplifier; the positive input terminal of amplifier is connected with the startup control circuit with described compensation; the negative input end of amplifier is connected with described constant flow regulation circuit as the feedback end of governor circuit; the output of Drive and Control Circuit is connected with the grid of described field effect transistor Q1; the source electrode of described field effect transistor Q1 is connected with the negative input end of described amplifier, and the drain electrode of described field effect transistor Q1 is connected with described load by output control circuit as the output of governor circuit.
3. the linear constant-current drive circuit of the LED high pressure of high-efficiency environment friendly according to claim 2, it is characterized in that: described field effect transistor Q1 is N channel field-effect pipe.
4. the linear constant-current drive circuit of the LED high pressure of high-efficiency environment friendly according to claim 2, it is characterized in that: described rectifier circuit comprises diode D1, diode D2, diode D3 and diode D4, described filter circuit comprises capacitor C 1, the anode of diode D1 is connected with described power supply, the anode of diode D1 is connected with the negative electrode of described diode D3, the anode of diode D2 is connected with described power supply, the negative electrode of diode D2 is connected with the negative electrode of described diode D1, the negative electrode of diode D2 also is connected with the positive pole of described capacitor C 1, the anode of diode D2 is connected with the negative electrode of diode D4, the anode of diode D4 is connected with the anode of described diode D3, and the anode of diode D4 is connected with the negative pole of described capacitor C 1.
5. the linear constant-current drive circuit of the LED high pressure of high-efficiency environment friendly according to claim 2, it is characterized in that: described reference voltage circuit comprises resistance R 1, resistance R 2, resistance R 3 and capacitor C 2, first conduction terminal of described resistance R 1 is connected with the positive pole of capacitor C 1, second conduction terminal of resistance R 1 and first conduction terminal of resistance R 2, first conduction terminal of capacitor C 2 and the power supply circuits of governor circuit connect, second conduction terminal of resistance R 2 is connected with the reference voltage input of governor circuit, second conduction terminal of described resistance R 2 also is connected with the earth terminal of governor circuit by resistance R 3, and second conduction terminal of capacitor C 2 is connected with the earth terminal of governor circuit.
6. according to the linear constant-current drive circuit of the LED high pressure of claim 1 or 2 or 3 or 4 described high-efficiency environment friendlies, it is characterized in that: described constant flow regulation circuit comprises power transformation resistance R5 and resistance R 4, first conduction terminal of described power transformation resistance R5 is connected with the feedback end of described governor circuit, and the power transformation end of described power transformation resistance R5 is connected with the earth terminal of governor circuit by resistance R 4.
7. the linear constant-current drive circuit of the LED high pressure of high-efficiency environment friendly according to claim 6, it is characterized in that: described output control circuit comprises field effect transistor Q2, resistance R 6 and resistance R 7, first conduction terminal of described resistance R 6 is connected with the output of described governor circuit, second conduction terminal of described resistance R 6 is connected with the grid of described field effect transistor Q2, the source electrode of described field effect transistor Q2 is connected with the power transformation end of described power transformation resistance R5, the source drain of described field effect transistor Q2 is connected with described load negative pole, first end of described resistance R 7 is connected with second end of described resistance R 6, second end of described resistance R 7 is connected with the output of described rectifier bridge, and second end of described resistance R 7 also is connected with the positive pole of described load.
8. the linear constant-current drive circuit of the LED high pressure of high-efficiency environment friendly according to claim 7, it is characterized in that: described field effect transistor Q2 is N channel field-effect pipe.
9. the linear constant-current drive circuit of the LED high pressure of high-efficiency environment friendly according to claim 7, it is characterized in that: described load is LED.
10. the linear constant-current drive circuit of the LED high pressure of high-efficiency environment friendly according to claim 2, it is characterized in that: described power supply circuits also include the calculating voltage delivery outlet, and described calculating voltage delivery outlet is connected with the positive input terminal of described amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201320133821 CN203167360U (en) | 2013-03-22 | 2013-03-22 | High efficiency environmental protection LED high voltage linear constant current driving circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320133821 CN203167360U (en) | 2013-03-22 | 2013-03-22 | High efficiency environmental protection LED high voltage linear constant current driving circuit |
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| CN203167360U true CN203167360U (en) | 2013-08-28 |
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| CN 201320133821 Expired - Fee Related CN203167360U (en) | 2013-03-22 | 2013-03-22 | High efficiency environmental protection LED high voltage linear constant current driving circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353816A (en) * | 2014-08-20 | 2016-02-24 | 联想(北京)有限公司 | Method for stabilizing power supply, power supply and electronic device |
| CN109473957A (en) * | 2018-12-24 | 2019-03-15 | 南宁职业技术学院 | Current sink circuit |
-
2013
- 2013-03-22 CN CN 201320133821 patent/CN203167360U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353816A (en) * | 2014-08-20 | 2016-02-24 | 联想(北京)有限公司 | Method for stabilizing power supply, power supply and electronic device |
| CN109473957A (en) * | 2018-12-24 | 2019-03-15 | 南宁职业技术学院 | Current sink circuit |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 Termination date: 20190322 |
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| CF01 | Termination of patent right due to non-payment of annual fee |