CN205071362U - Dc supply's automatic LED driver - Google Patents
Dc supply's automatic LED driver Download PDFInfo
- Publication number
- CN205071362U CN205071362U CN201520621988.3U CN201520621988U CN205071362U CN 205071362 U CN205071362 U CN 205071362U CN 201520621988 U CN201520621988 U CN 201520621988U CN 205071362 U CN205071362 U CN 205071362U
- Authority
- CN
- China
- Prior art keywords
- resistance
- npn type
- type triode
- power supply
- led
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The utility model discloses a dc supply's automatic LED driver. Including DC power supply (1), DC power supply (1) is connected with controllable constant -current module (2), and controllable constant -current module (2) are connected with a set of above LED banks (3), LED banks (3) including more than one LED lamp pearl (4), controllable constant -current module (2) still be connected with automatic switch (5). The utility model has the characteristics of the user experiences, energy -conserving, with low costs and longe -lived.
Description
Technical field
The utility model relates to the automatic LED driver of the illuminating equipment in a kind of public place, particularly a kind of direct current supply.
Background technology
At present, the public corridor flow of personnel such as underground parking, underpass changes greatly, and its illumination adopts normal bright lamp and automatic lighting lamp usually, adopts above-mentioned lighting system mainly to there is following shortcoming: 1) adopt normal bright lamp to throw light on, energy consumption is large; As filled lamp number in order to energy-conservation minimizing, its illumination does not reach national standard again.2) adopt automatic lighting lamp illumination, people Lai Dengliang, people walks delayed lamp and goes out, although achieve energy-conservation to a certain extent, greatly, human eye can produce unconformable situation, causes user's comfortableness poor in use brightness change.
Summary of the invention
The purpose of this utility model is, provides a kind of automatic LED driver of direct current supply.The utility model has the advantages that user experiences, energy-conservation, cost is low and the life-span is long.
The technical solution of the utility model: a kind of automatic LED driver of direct current supply, comprises DC power supply, DC power supply and controllable constant-current model calling, controllable constant-current module is connected with the LED group of more than a group; Described LED group comprises more than one LED lamp bead; Described controllable constant-current module is also connected with automatic switch.
In the automatic LED driver of aforesaid direct current supply, described controllable constant-current module comprises the first resistance, one end of first resistance is connected with the positive pole of DC power supply, the other end of the first resistance respectively with the first NPN type triode collector electrode, capacitance cathode, the second NPN type triode collector electrode is connected with one end of the 4th resistance; The base stage of the first described NPN type triode is connected with control voltage input through the 5th resistance, and emitter is connected with DC power cathode; The negative pole of described electric capacity is connected with DC power cathode; The other end of the 4th described resistance is connected with the grid of depletion type N raceway groove isolated gate FET, the source electrode of depletion type N raceway groove isolated gate FET is connected with the second resistance, the drain electrode of depletion type N raceway groove isolated gate FET is connected with the negative pole of LED group, goes back and be connected to the 3rd resistance between source electrode and drain electrode; The described emitter of the second NPN type triode is connected with the negative pole of DC power supply, is also connected with the second resistance between emitter and base stage.
In the automatic LED driver of aforesaid direct current supply, collector electrode and the base stage part of the second described NPN type triode are also connected with voltage stabilizing didoe, voltage stabilizing didoe negative electrode is connected with the collector electrode of the second NPN type triode, and anode is connected with the base stage of the second NPN type triode.
Compared with prior art, the utility model is by the first resistance, the 4th resistance, depletion type N raceway groove isolated gate FET, the second NPN type triode, be interconnected to constitute a constant-current circuit between the second resistance and electric capacity; When automatic switch turns off, namely when control voltage input terminal voltage is not 0, first NPN type triode is connected, electric capacity both end voltage is 0, depletion type N raceway groove isolated gate FET grid voltage is 0, this pipe turns off, and the source electrode of depletion type N raceway groove isolated gate FET and drain electrode are through the 3rd resistance conducting; By foregoing circuit structure, making depletion type N raceway groove isolated gate FET when turning off, still having small area analysis to flow through LED group in circuit, this electric current ensure that the basis illumination of LED lamp bead.When automatic switch is connected, namely when control voltage input terminal voltage is 0, first NPN type triode turns off, DC power supply is by the first resistance to capacitor charging, and electric capacity both end voltage raises, and the grid voltage of depletion type N raceway groove isolated gate FET raises, make this pipe conducting, flow through LED group electric current and strengthen (highlight illumination electric current), now, LED lamp bead is highlight illumination.From the above, the utility model is by the illumination as required of the control voltage input terminal voltage signal controlling LED lamp bead of automatic switch, when the public places such as parking lot nobody time, the signal of telecommunication that control voltage input exports is 0, now throw light on based on LED lamp bead, when there being people, control voltage input terminal voltage signal is 0, and now LED lamp bead is highlight illumination; By this structure, make human eye have one to adapt to the process of high-brightness environment gradually by low-light level environment, avoid human eye and produce uncomfortable sensation because ambient brightness instantaneous variation is excessive, thus improve the experience comfortableness of user; Moreover, adopt the LED lamp bead of variable-brightness, consume energy under the state of low-light level (basis illumination) low, effectively reduce the energy consumption of equipment, saved the energy.And brightness change is little to the aging effects of LED lamp bead frequently, and during low-light level, the caloric value of LED lamp bead is low, so the utility model also effectively reduces heat radiation cost, lower calorific value also effectively extends the useful life of LED lamp bead.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the electrical block diagram of controllable constant-current module.
Being labeled as in accompanying drawing: 1-DC power supply, 2-controllable constant-current module, 3-LED lamp group, 4-LED lamp pearl, 5-automatic switch, R1-first resistance, R2-second resistance, R3-the 3rd resistance, R4-the 4th resistance, R5-the 5th resistance, C1-electric capacity, Q1-first NPN type triode, Q2-second NPN type triode, Q3-depletion type N raceway groove isolated gate FET, G-grid, S-source electrode, D-drains, DW1-voltage stabilizing didoe, UK-control voltage input.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further described, but not as the foundation limited the utility model.
Embodiment.An automatic LED driver for direct current supply, form as shown in Figure 1-2, comprise DC power supply 1, DC power supply 1 is connected with controllable constant-current module 2, and controllable constant-current module 2 is connected with the LED group 3 of more than a group; Described LED group 3 comprises more than one LED lamp bead 4; Described controllable constant-current module 2 is also connected with automatic switch 5.
Aforesaid controllable constant-current module 2 comprises the first resistance R1, one end of first resistance R1 is connected with the positive pole of DC power supply 1, the other end of the first resistance R1 respectively with the first NPN type triode Q1 collector electrode, electric capacity C1 positive pole, the second NPN type triode Q2 collector electrode is connected with one end of the 4th resistance R4; The base stage of the first described NPN type triode Q1 is connected with control voltage input UK through the 5th resistance R5, and emitter is connected with DC power supply 1 negative pole; The negative pole of described electric capacity C1 is connected with DC power supply 1 negative pole; The other end of the 4th described resistance R4 is connected with the grid G of depletion type N raceway groove isolated gate FET Q3, the source S of depletion type N raceway groove isolated gate FET Q3 is connected with the second resistance R2, the drain D of depletion type N raceway groove isolated gate FET Q3 is connected with the negative pole of LED group 3, goes back and be connected to the 3rd resistance R3 between source S and drain D; The emitter of the second described NPN type triode Q2 is connected with the negative pole of DC power supply 1, is also connected with the second resistance R2 between emitter and base stage.
Collector electrode and the base stage part of aforesaid second NPN type triode Q2 are also connected with voltage stabilizing didoe DW1, and voltage stabilizing didoe DW1 negative electrode is connected with the collector electrode of the second NPN type triode Q2, and anode is connected with the base stage of the second NPN type triode Q2.By this setting, the available protecting second NPN type triode Q2 operationally not easy burn-out.
The resistance of aforesaid first resistance R1 is 1 ~ 5K Ω; The voltage of described voltage stabilizing didoe DW1 is 10 ~ 18V; The resistance of the 4th described resistance R4 is 1K Ω, and the value of described electric capacity C1 is 1 μ F/25V (capacitance is 1 μ F, and maximum voltage is 25V); During described second NPN type triode Q2 conducting, base stage and emitter voltage are voltage is 0.7V; The resistance of the second described resistance R2 is:
, wherein
I is the rated current of LED lamp bead 4,
M is the group number of LED group 3;
The resistance of the 3rd described resistance R3 is:
, wherein
U1 is DC power supply 1 voltage,
Electric current when I is the illumination of LED basis,
U
lfor both end voltage during LED lamp bead 4 small area analysis,
N is the number of the LED lamp bead 4 of series connection in one group of LED group 3.
Aforesaid automatic switch 5 is Doppler effect switch, microwave switch or supersonic switch etc.
Operation principle of the present utility model: when the public places such as parking lot nobody time, automatic switch 5 turns off, control voltage input UK voltage is not 0, first NPN type triode Q1 conducting, depletion type N raceway groove isolated gate FET Q3 turns off, source S and drain D through the 3rd resistance R3 conducting, lighting current (small area analysis) based on the electric current flowing through LED group 3 in circuit, this electric current ensure that the basis illumination of LED lamp bead 4; When there being people, automatic switch 5 is responded to and is connected, control voltage input UK voltage is 0, first NPN type triode Q1 turns off, depletion type N raceway groove isolated gate FET Q3 conducting, the electric current flowing through LED group 3 in circuit is highlight illumination electric current, and this electric current ensure that the highlight illumination of LED lamp bead 4, adapts to the user demand of people with this.After people leaves, automatic switch 5 turns off again, replys basis illumination.
Claims (3)
1. an automatic LED driver for direct current supply, is characterized in that: comprise DC power supply (1), and DC power supply (1) is connected with controllable constant-current module (2), and controllable constant-current module (2) is connected with the LED group (3) of more than a group; Described LED group (3) comprises more than one LED lamp bead (4); Described controllable constant-current module (2) is also connected with automatic switch (5).
2. the automatic LED driver of direct current supply according to claim 1, it is characterized in that: described controllable constant-current module (2) comprises the first resistance (R1), one end of first resistance (R1) is connected with the positive pole of DC power supply (1), the other end of the first resistance (R1) respectively with the first NPN type triode (Q1) collector electrode, electric capacity (C1) positive pole, the second NPN type triode (Q2) collector electrode is connected with one end of the 4th resistance (R4); The base stage of described the first NPN type triode (Q1) is connected with control voltage input (UK) through the 5th resistance (R5), and emitter is connected with DC power supply (1) negative pole; The negative pole of described electric capacity (C1) is connected with DC power supply (1) negative pole; The described other end of the 4th resistance (R4) is connected with the grid (G) of depletion type N raceway groove isolated gate FET (Q3), the source electrode (S) of depletion type N raceway groove isolated gate FET (Q3) is connected with the second resistance (R2), the drain electrode (D) of depletion type N raceway groove isolated gate FET (Q3) is connected with the negative pole of LED group (3), goes back and be connected to the 3rd resistance (R3) between source electrode (S) and drain electrode (D); The emitter of described the second NPN type triode (Q2) is connected with the negative pole of DC power supply (1), is also connected with the second resistance (R2) between emitter and base stage.
3. the automatic LED driver of direct current supply according to claim 2, it is characterized in that: collector electrode and the base stage part of described the second NPN type triode (Q2) are also connected with voltage stabilizing didoe (DW1), voltage stabilizing didoe (DW1) negative electrode is connected with the collector electrode of the second NPN type triode (Q2), and anode is connected with the base stage of the second NPN type triode (Q2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520621988.3U CN205071362U (en) | 2015-08-18 | 2015-08-18 | Dc supply's automatic LED driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520621988.3U CN205071362U (en) | 2015-08-18 | 2015-08-18 | Dc supply's automatic LED driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205071362U true CN205071362U (en) | 2016-03-02 |
Family
ID=55397858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520621988.3U Expired - Fee Related CN205071362U (en) | 2015-08-18 | 2015-08-18 | Dc supply's automatic LED driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205071362U (en) |
-
2015
- 2015-08-18 CN CN201520621988.3U patent/CN205071362U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20210818 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |