CN206149552U - A dimmer circuit for non - isolation LED drive power supply - Google Patents
A dimmer circuit for non - isolation LED drive power supply Download PDFInfo
- Publication number
- CN206149552U CN206149552U CN201621199052.7U CN201621199052U CN206149552U CN 206149552 U CN206149552 U CN 206149552U CN 201621199052 U CN201621199052 U CN 201621199052U CN 206149552 U CN206149552 U CN 206149552U
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- China
- Prior art keywords
- resistance
- led drive
- drive power
- power supply
- circuit
- 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.)
- Withdrawn - After Issue
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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
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Led Devices (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses a dimmer circuit for non - isolation LED drive power supply, including the power, the light modulator that the LED drive power supply connection is used for sending the signal of adjusting luminance to the non - LED drive power supply of isolation is kept apart to at least two sets of non - isolation LED drive power supply and the NOT AND is connected with the power, and non - isolation LED drive power supply includes that it carries out the regulator circuit adjusted to be used for swaing the light signal, and the regulator circuit is differential input circuit or coupling input circuit. The utility model provides a pair of a dimmer circuit for non - isolation LED drive power supply can avoid line voltage drop's production for non - isolation LED drive power supply can adjust luminance to a plurality of LED drive power supply through a light modulator.
Description
Technical field
This utility model is related to a kind of light adjusting circuit, and in particular to a kind of light modulation electricity for non-isolated LED drive power
Road.
Background technology
LED (Light Emitting Diode) is called and does light emitting diode, and it is visible to be that one kind can be converted electrical energy into
The semiconductor device of the solid-state of light, it directly can be converted into light electricity.The heart of LED is the chip of a quasiconductor, chip
One end be attached on a support, one end is negative pole, and the other end connects the positive pole of power supply, makes whole chip by epoxy encapsulation
Get up.Because LED has the advantages that energy-saving and environmental protection, many changes and long service life, it is widely used in indoor and outdoor lighting neck
Domain.
Current LED drive power generally needs to have dimming function.Current application be most widely 0～10V light modulation and
PWM is dimmed.When dimming to multiple LED, dimmer output 0～10V analogue signals or pwm signal of a concentration, together
When multiple light fixtures for being docked on same circuit dimmed, as shown in Figure 1.
But, when the LED drive power for needing the multiple non-isolated to the direct current supply on the same line is dimmed, each electricity
Flow through between the ground in source and exist between electric current, therefore ground potential pressure drop, and first that exports ground and circuit starting point of dimmer
There is suitable voltage drop in driving power supply, so cause the output of dimmer on same current potential with the ground potential of line end
Voltage magnitude is varied widely when signal is connected to these power supplys, therefore cannot normally be dimmed.In order to normally dim, need to every
One single LED drive power configures an independent dimmer, so can significantly increase cost.
Utility model content
This utility model be in order to overcome prior art in when dimming to multiple LED drive powers of direct current supply, due to
The presence of potential difference causes different LED drive power change in voltage big and cannot carry out asking for normal light modulation using a dimmer
Multiple LED can be driven by a kind of topic, there is provided light adjusting circuit for non-isolated LED drive power by a dimmer
Galvanic electricity source is dimmed.
This utility model provides a kind of light adjusting circuit for non-isolated LED drive power, including power supply, is connected with power supply
At least two groups non-isolated LED drive powers and with non-isolated LED drive power be connected to non-isolated LED drive power send out
The dimmer of dim signal, non-isolated LED drive power is sent to include that the dim signal for sending to dimmer carries out common mode suppression
The adjustment circuit of system.
A kind of light adjusting circuit for non-isolated LED drive power described in the utility model, it is preferred that, adjustment
Circuit is Differential input circuit, by first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance,
Seven resistance, the 8th resistance and the first operational amplifier composition；The positive input of the first operational amplifier and the 5th resistance, the 6th
Resistance and the 8th resistance are connected, and dimmer output plus terminal is connected with the 4th resistance and the 5th resistance, the first operational amplifier it is anti-
It is connected with second resistance, 3rd resistor and the 7th resistance to input, dimmer exports negative terminal with first resistor and 3rd resistor
It is connected, the outfan of the first operational amplifier is connected with the 7th resistance.The power positive end and second resistance of the first operational amplifier
It is connected with the 6th resistance.The power supply negative terminal of the first operational amplifier is connected with first resistor, the 4th resistance and the 8th resistance.
A kind of light adjusting circuit for non-isolated LED drive power described in the utility model, it is preferred that,
First resistor and the 4th resistor satisfied：
R1=R4；
Second resistance and the 6th resistor satisfied：
R2=R6；
3rd resistor and the 5th resistor satisfied：
R3=R5；
7th resistance and the 8th resistor satisfied：
R7=R8；
Second resistance and 3rd resistor meet：
R2 ＜ V/Vcc × R3；
Wherein：V represents the maximum voltage difference between ground potential；
Vcc represents that operational amplifier controls supply voltage value.
A kind of light adjusting circuit for non-isolated LED drive power described in the utility model, it is preferred that, adjustment
Circuit is couple input circuit, is made up of the 9th resistance, the tenth resistance and photo-coupler, the terminal 1 of photo-coupler with by the
Nine resistance are connected with dimmer output plus terminal, and the terminal 2 of photo-coupler is connected with dimmer output negative terminal, the terminal of photo-coupler
3 are connected with the tenth resistance, and the terminal 4 of photo-coupler is grounded.
A kind of light adjusting circuit for non-isolated LED drive power described in the utility model, it is preferred that, the 9th
It is resistor satisfied：
R9<(Vp-Vd)/In,
Wherein：Vp represents the high potential of the pwm signal of input；
Vd represents the pressure drop of photo-coupler diode；
In represents input current.
This utility model can avoid the generation of line drop due to adjustment circuit is increased in light adjusting circuit so that
Non-isolated LED drive power can be dimmed by a dimmer to multiple LED drive powers.
Description of the drawings
Fig. 1 is LED drive power light adjusting circuit in prior art.
Fig. 2 is a kind of light adjusting circuit for non-isolated LED drive power.
Fig. 3 is for the light adjusting circuit of non-isolated LED drive power in embodiment 1.
Fig. 4 is the circuit diagram of adjustment circuit in embodiment 1.
Fig. 5 is for the light adjusting circuit of non-isolated LED drive power in embodiment 2.
Fig. 6 is the circuit diagram of adjustment circuit in embodiment 2.
Description of the drawings：V1, dimmer input positive terminal；V2, dimmer input negative terminal；U1, the first operational amplifier；R1,
One resistance；R2, second resistance；R3,3rd resistor；R4, the 4th resistance；R5, the 5th resistance；R6, the 6th resistance；It is R7, the 7th electric
Resistance；R8, the 8th resistance；R9, the 9th resistance；R10, the tenth resistance.
Specific embodiment
As shown in Fig. 2 this utility model provides a kind of light adjusting circuit for non-isolated LED drive power, including power supply,
Two groups of non-isolated LED drive powers being connected with power supply and it is connected to drive non-isolated LED with non-isolated LED drive power
Power supply sends the dimmer of dim signal, and non-isolated LED drive power includes that the dim signal for sending to dimmer is carried out
The adjustment circuit of common mode inhibition.
Embodiment 1
Differential Input method, as shown in Figure 3 and Figure 5, adjustment circuit is Differential input circuit, by first resistor R1, second electric
Resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8 and first
Operational amplifier U1 is constituted；The positive input of the first operational amplifier U1 is electric with the 5th resistance R5, the 6th resistance R6 and the 8th
Resistance R8 is connected, and dimmer output plus terminal V1 is connected with the 4th resistance R4, the 5th resistance R5 and the 6th resistance R6, the first operation amplifier
The reverse input end of device U1 is connected with second resistance R2,3rd resistor R3 and the 7th resistance R7, dimmer output negative terminal V2 and the
One resistance R1, second resistance R2 are connected with 3rd resistor R3, the outfan of the first operational amplifier U1 and the 7th resistance R27 phases
Even.Wherein：
First resistor R1 and the 4th resistance R4 resistance values meet：
R1=R4；
Second resistance R2 and the 6th resistance R6 resistance values meet：
R2=R6；
3rd resistor R3 and the 5th resistance R5 resistance values meet：
R3=R5；
7th resistance R7 and the 8th resistance value meet：
R7=R8；
Second resistance R2 and 3rd resistor R3 resistance value meet：
R2 ＜ V/Vcc × R3；
Wherein：V represents the maximum voltage difference between ground potential；
Vcc represents that operational amplifier controls supply voltage value.
The present embodiment can be applied to 0～10V light modulations or PWM light modulations.
Embodiment 2
Light-coupled isolation method, as shown in Figure 4 and Figure 6, adjustment circuit is couple input circuit, by the 9th resistance R9, the tenth electric
Resistance R10 and photo-coupler composition, the terminal 1 of photo-coupler be connected with dimmer output plus terminal V1 by the 9th resistance R9, light
The terminal 2 of bonder is connected with dimmer output negative terminal V2, and the terminal 3 of photo-coupler is connected with the tenth resistance R10, photo-coupler
Terminal 4 be grounded；9th resistance R9 resistance values meet：
R9<(Vp-Vd)/In,
Wherein：Vp represents the high potential of the pwm signal of input；
Vd represents the pressure drop of photo-coupler diode；
In represents input current.
The interface logic and electrical characteristic of dimmer is designed as：
1) dim signal is unloaded short-circuit or permanent when being low, and power supply is exported with rated current；
2) when dim signal perseverance is high, power supply is in no current output state；
3) frequency of dim signal is about 1kHz；
4) dutycycle D (ratio in high potential time and cycle) of dim signal determines output current, and formula is I=
(1-D) * In, wherein In are rated current；
5) the light modulation input current of each non-isolated power supply is less than 2mA.
The present embodiment can be applied to PWM light modulations.
It is described above to be merely exemplary for this utility model, and nonrestrictive, those of ordinary skill in the art
Understand, in the case of the spirit and scope limited without departing from claim, any modification, change or the equivalent shape that can be made
Formula is fallen within the protection domain of utility model.
Claims (5)
1. a kind of light adjusting circuit for non-isolated LED drive power, including power supply, at least two groups be connected with the power supply are non-
Isolate LED drive power and be connected to send the non-isolated LED drive power with the non-isolated LED drive power and adjust
The dimmer of optical signal, it is characterised in that：The non-isolated LED drive power includes the light modulation for sending to the dimmer
Signal carries out the adjustment circuit of common mode inhibition.
2. a kind of light adjusting circuit for non-isolated LED drive power according to claim 1, it is characterised in that：It is described
Adjustment circuit is Differential input circuit, by first resistor (R1), second resistance (R2), 3rd resistor (R3), the 4th resistance (R4),
5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7), the 8th resistance (R8) and the first operational amplifier (U1) composition；
The positive input of first operational amplifier (U1) and the 5th resistance (R5), the 6th resistance (R6) and described
Eight resistance (R8) are connected, dimmer output plus terminal (V1) and the 4th resistance (R4), the 5th resistance (R5) and described the
Six resistance (R6) are connected, the reverse input end of first operational amplifier (U1) and the second resistance (R2), the described 3rd
Resistance (R3) is connected with the 7th resistance (R7), dimmer output negative terminal (V2) with the first resistor (R1), described second
Resistance (R2) is connected with the 3rd resistor (R3), outfan and the 7th resistance of first operational amplifier (U1)
(R7) it is connected.
3. a kind of light adjusting circuit for non-isolated LED drive power according to claim 2, it is characterised in that：It is described
Second resistance (R2) and the 3rd resistor (R3) meet：
R3 ＜ V/Vcc × R2,
Wherein：V represents the maximum voltage difference between ground potential；
Vcc represents that operational amplifier controls supply voltage value.
4. a kind of light adjusting circuit for non-isolated LED drive power according to claim 1, it is characterised in that：It is described
Adjustment circuit is couple input circuit, is made up of the 9th resistance (R9), the tenth resistance (R10) and photo-coupler, the optical coupling
The terminal 1 of device be connected with dimmer output plus terminal (V1) by the 9th resistance (R9), the terminal 2 of the photo-coupler with
Dimmer output negative terminal (V2) is connected, and the terminal 3 of the photo-coupler is connected with the tenth resistance (R10), the optical coupling
The terminal 4 of device is grounded.
5. a kind of light adjusting circuit for non-isolated LED drive power according to claim 4, it is characterised in that：It is described
9th resistance (R9) meets：
R9<(Vp-Vd)/In,
Wherein：Vp represents the high potential of the pwm signal of input；
Vd represents the pressure drop of photo-coupler diode；
In represents input current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621199052.7U CN206149552U (en) | 2016-11-07 | 2016-11-07 | A dimmer circuit for non - isolation LED drive power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621199052.7U CN206149552U (en) | 2016-11-07 | 2016-11-07 | A dimmer circuit for non - isolation LED drive power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206149552U true CN206149552U (en) | 2017-05-03 |
Family
ID=58626077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621199052.7U Withdrawn - After Issue CN206149552U (en) | 2016-11-07 | 2016-11-07 | A dimmer circuit for non - isolation LED drive power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206149552U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106332375A (en) * | 2016-11-07 | 2017-01-11 | 上海泓语电气技术有限公司 | Dimming circuit for non-isolated LED (light-emitting diode) driving power supplies |
-
2016
- 2016-11-07 CN CN201621199052.7U patent/CN206149552U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106332375A (en) * | 2016-11-07 | 2017-01-11 | 上海泓语电气技术有限公司 | Dimming circuit for non-isolated LED (light-emitting diode) driving power supplies |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170503 Effective date of abandoning: 20180626 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20170503 Effective date of abandoning: 20180626 |