CN211606874U - Control circuit for 0-10V small dimming quick start - Google Patents
Control circuit for 0-10V small dimming quick start Download PDFInfo
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- CN211606874U CN211606874U CN202020118244.0U CN202020118244U CN211606874U CN 211606874 U CN211606874 U CN 211606874U CN 202020118244 U CN202020118244 U CN 202020118244U CN 211606874 U CN211606874 U CN 211606874U
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Abstract
The utility model discloses a control circuit of 0-10V small dimming quick start, including zener diode D4, electric capacity C3, control circuit still includes optoelectronic coupler U3, triode Q6, wherein optoelectronic coupler U3's first pin and triode Q6's C electrode electric connection, optoelectronic coupler U3's second pin and PWM circuit electric connection, optoelectronic coupler U3's third pin and zener diode D12's one end electric connection, ground connection simultaneously, optoelectronic coupler U3's fourth pin and zener diode D12's the other end, resistance R26's one end, PWM1 circuit electric connection, resistance R26's the other end passes through diode D9 and VCC1 is connected; the utility model discloses can realize 0-10V dimming power supply and start time overlength's solution when the low pressure input of little dimming.
Description
Technical Field
The utility model relates to a control circuit that 0-10V small dimming starts fast.
Background
0-10V dimming is one of the main realization modes of the dimming power supply in the existing market, has good compatibility and low cost, and is widely applied to the market.
At present, the lamp market has higher and higher requirements on output stroboflash, the stroboflash is less than <30% or even no stroboflash, and electrolysis with a larger capacity value (hereinafter referred to as large electrolysis) is used under the consideration of cost.
The stroboscopic requirement can be met by using large electrolysis, but the large electrolysis conflicts with the starting time under small dimming, the transmission energy generated by a power loop under the small dimming is very small, the LED characteristic requirement can work only when a certain VF voltage is reached, and the time from charging of the large electrolysis to conducting of the LED is longer under the transmission energy of the small dimming, so that the time under the starting of the small dimming is longer.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to realize the solution of 0-10V dimming power supply start time overlength when the low pressure input of dim light, also solved simultaneously and had big electrolysis (stroboscopic requirement) and the small contradiction of time overlength between electrolysis charging to load LED operating voltage under adjusting light, provide a control circuit that 0-10V dim light starts fast.
In order to solve the technical problem, the utility model provides a following technical scheme:
a control circuit for small dimming and fast starting of 0-10V comprises a voltage stabilizing diode D4 and a capacitor C3, and is characterized in that: the control circuit further comprises a photoelectric coupler U3 and a triode Q6, wherein a first pin of the photoelectric coupler U3 is electrically connected with a C electrode of the triode Q6, a second pin of the photoelectric coupler U3 is electrically connected with a PWM circuit, a third pin of the photoelectric coupler U3 is electrically connected with one end of a zener diode D12 and is grounded, a fourth pin of the photoelectric coupler U3 is electrically connected with the other end of the zener diode D12, one end of a resistor R26 and the PWM1 circuit, and the other end of the resistor R26 is connected with VCC1 through a diode D9; triode Q6's B electrode respectively with zener diode D4's one end, electric capacity C3's one end electric connection, electric capacity C3's the other end pass through resistance R5 with triode Q6's E electrode electric connection, zener diode D4's the other end passes through resistance R4 and is connected with VCC.
Preferably, the a terminal of the transformer T1 is electrically connected to one terminal of the diode D1 and one terminal of the capacitor C1, respectively, wherein the other terminal of the diode D1 is electrically connected to the other terminal of the capacitor C1 through the resistor R8, and the other terminal of the diode D1 is also electrically connected to one terminal of the polar capacitor EC2, one terminal of the polar capacitor EC3, one terminal of the resistor R1, and the first pin of the common mode inductor, respectively.
Preferably, the terminal B of the transformer T1 is electrically connected to the other terminal of the polar capacitor EC2, the other terminal of the polar capacitor EC3, the other terminal of the resistor R1, and the third pin of the common mode inductor, respectively; the second pin of the common mode inductor is electrically connected with the fourth pin of the common mode inductor through a plurality of LED lamps connected in series, and the other end of the polar capacitor EC2 is grounded.
The utility model discloses still provide another technical scheme: a control circuit for small dimming and quick start of 0-10V comprises a photoelectric coupler U3, a photoelectric coupler U4 and a diode U5, wherein a first pin of the photoelectric coupler U3 is electrically connected with a third pin of the photoelectric coupler U4, a second pin and a third pin of the photoelectric coupler U3 are grounded, and a fourth pin of the photoelectric coupler U3 is electrically connected with a PWM1 circuit; the fourth pin of the photocoupler U4 is electrically connected with the PWM circuit, the first pin of the photocoupler U4 is electrically connected with one end of a resistor R40 through a resistor R36, the other end of the resistor R40 is electrically connected with the R end of a diode U5 and one end of a resistor R41 respectively, wherein the other end of the resistor R41 is electrically connected with the A end of the diode U5, and the K end of the diode U5 is electrically connected with the second pin of the photocoupler U4.
The utility model discloses the beneficial effect who reaches is:
the utility model discloses the circuit is simple, and the reliability is high, and is with low costs, the utility model discloses can realize that 0-10V adjusts luminance the solution of the start-up time overlength when the low pressure input of small light modulation, also solved simultaneously and have big electrolysis (stroboscopic requirement) and small light modulation to adjust luminance down the electrolysis charge to the contradiction of load LED operating voltage time overlength between.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a circuit diagram of the present invention;
fig. 2 is a circuit diagram of the secondary side of the power loop of the present invention;
fig. 3 is a circuit diagram of the LED load circuit of the present invention.
FIG. 4 is a statistical graph of the start-up time, voltage and current of the present invention;
FIG. 5 is a statistical graph of the start-up time, voltage and current of the present invention;
fig. 6 is a circuit diagram of another embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
From the charge time of the capacitor versus voltage: the relationship of U = QC = QIT indicates that the current I is inversely proportional to the time T when the capacitance and the voltage are constant.
Because the small dimming signal intervenes feedback too early after starting, the transmission energy of the circuit is very low, i.e. I is very small, and the voltage U for electrolysis to reach the LED working is fixed, so that the time for electrolysis charging is longer, and the smaller the current I is, the longer the time is. Then assuming that small dimming does not intervene in the power line when the power supply is started, and the transmitted energy I is maximized (corresponding to the maximum dimming), T for electrolytic charging becomes very short, where we define a threshold slightly lower than the LED operating voltage, and the dimming signal intervenes, so that the electrolysis time after starting is greatly shortened, i.e. the starting time is shortened.
It is mentioned here that a threshold voltage slightly lower than the LED operation is set, and if the voltage is higher than the LED operation voltage, the power supply will have operated at maximum brightness after starting, and then the dimming feedback is formed and changed to low brightness, and a flashing state is formed. If the threshold voltage is low, the power supply startup time will be longer.
As shown in fig. 1 to 3, an embodiment of the present invention is provided: a control circuit for small dimming and fast starting of 0-10V comprises a voltage stabilizing diode D4, a capacitor C3, a photoelectric coupler U3 and a triode Q6, wherein a first pin of the photoelectric coupler U3 is electrically connected with a C electrode of a triode Q6, a second pin of the photoelectric coupler U3 is electrically connected with a PWM circuit, a third pin of the photoelectric coupler U3 is electrically connected with one end of the voltage stabilizing diode D12, the voltage stabilizing diode D12 is grounded, a fourth pin of the photoelectric coupler U3 is electrically connected with the other end of the voltage stabilizing diode D12, one end of a resistor R26 and the PWM1 circuit, and the other end of the resistor R26 is connected with VCC1 through a diode D9; triode Q6's B electrode respectively with zener diode D4's one end, electric capacity C3's one end electric connection, electric capacity C3's the other end pass through resistance R5 with triode Q6's E electrode electric connection, zener diode D4's the other end passes through resistance R4 and is connected with VCC. The end a of the transformer T1 is electrically connected to one end of the diode D1 and one end of the capacitor C1, respectively, wherein the other end of the diode D1 is electrically connected to the other end of the capacitor C1 through the resistor R8, and the other end of the diode D1 is also electrically connected to one end of the polar capacitor EC2, one end of the polar capacitor EC3, one end of the resistor R1, and the first pin of the common mode inductor, respectively. The end B of the transformer T1 is electrically connected with the other end of the polar capacitor EC2, the other end of the polar capacitor EC3, the other end of the resistor R1 and a third pin of the common-mode inductor respectively; the second pin of the common mode inductor is electrically connected with the fourth pin of the common mode inductor through a plurality of LED lamps connected in series, and the other end of the polar capacitor EC2 is grounded.
The circuit component of this embodiment mainly comprises zener diode, resistance, electric capacity, triode and opto-coupler, this circuit utilizes zener diode's threshold value characteristic, reach the breakdown voltage value of zener diode and just can switch on and then make Q6 switch on when VCC, PWM signal and opto-coupler just can intervene feedback loop and transmit the signal and give former limit dimming control IC and then realize adjusting luminance this moment, when voltage does not reach zener diode breakdown voltage like this, dimming control IC does not have the signal of adjusting luminance and works with the biggest state of adjusting luminance (feedback loop open loop), power circuit transmission energy is very high, it is very fast and make whole circuit start-up time shorten greatly to charge greatly the electrolysis. Where VCC is the auxiliary winding of the transformer, which may be proportional to the large electrolysis voltage Vout through different windings of the transformer. The utility model discloses a feedback loop open loop mode solves the low time slow mode that leads to the start time of electrolysis charging under the circuit transmission energy of 0-10V small dimming feedback.
As shown in fig. 6, another embodiment of the present invention is provided: a control circuit for small dimming and quick start of 0-10V comprises a photoelectric coupler U3, a photoelectric coupler U4 and a diode U5, wherein a first pin of the photoelectric coupler U3 is electrically connected with a third pin of the photoelectric coupler U4, a second pin and a third pin of the photoelectric coupler U3 are grounded, and a fourth pin of the photoelectric coupler U3 is electrically connected with a PWM1 circuit; the fourth pin of the photocoupler U4 is electrically connected with the PWM circuit, the first pin of the photocoupler U4 is electrically connected with one end of a resistor R40 through a resistor R36, the other end of the resistor R40 is electrically connected with the R end of a diode U5 and one end of a resistor R41 respectively, wherein the other end of the resistor R41 is electrically connected with the A end of the diode U5, and the K end of the diode U5 is electrically connected with the second pin of the photocoupler U4.
The utility model discloses a PWM1 circuit is the signal that produces the power supply primary side IC work of adjusting luminance, and PWM1 circuit is common circuit.
The PWM circuit of the present invention generates 0-10V signal and transmits the signal through IC device, and is suitable for many IC markets, such as SY5867FAC of Siljg, IW337 of IWATT, etc.
Fig. 4 is a start-up time of 3.69S without the circuitry herein, rectangle: inputting a voltage; thin line: the electrolysis voltage; thick line: and outputting the current.
Fig. 5 is a diagram illustrating that the starting time of the circuit of the present scheme is increased by 0.9S, and the rectangle is as follows: inputting a voltage; thin line: the electrolysis voltage; thick line: and outputting the current.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A control circuit for small dimming and fast starting of 0-10V comprises a voltage stabilizing diode D4 and a capacitor C3, and is characterized in that: the control circuit further comprises a photoelectric coupler U3 and a triode Q6, wherein a first pin of the photoelectric coupler U3 is electrically connected with a C electrode of the triode Q6, a second pin of the photoelectric coupler U3 is electrically connected with a PWM circuit, a third pin of the photoelectric coupler U3 is electrically connected with one end of a zener diode D12 and is grounded, a fourth pin of the photoelectric coupler U3 is electrically connected with the other end of the zener diode D12, one end of a resistor R26 and the PWM1 circuit, and the other end of the resistor R26 is connected with VCC1 through a diode D9; triode Q6's B electrode respectively with zener diode D4's one end, electric capacity C3's one end electric connection, electric capacity C3's the other end pass through resistance R5 with triode Q6's E electrode electric connection, zener diode D4's the other end passes through resistance R4 and is connected with VCC.
2. The control circuit for small dimming fast start of 0-10V as claimed in claim 1, wherein: the end a of the transformer T1 is electrically connected to one end of the diode D1 and one end of the capacitor C1, respectively, wherein the other end of the diode D1 is electrically connected to the other end of the capacitor C1 through the resistor R8, and the other end of the diode D1 is also electrically connected to one end of the polar capacitor EC2, one end of the polar capacitor EC3, one end of the resistor R1, and the first pin of the common mode inductor, respectively.
3. The control circuit for small dimming fast start of 0-10V as claimed in claim 1, wherein: the end B of the transformer T1 is electrically connected with the other end of the polar capacitor EC2, the other end of the polar capacitor EC3, the other end of the resistor R1 and a third pin of the common-mode inductor respectively; the second pin of the common mode inductor is electrically connected with the fourth pin of the common mode inductor through a plurality of LED lamps connected in series, and the other end of the polar capacitor EC2 is grounded.
4. The control circuit for small dimming fast start of 0-10V as claimed in claim 1, wherein: the control circuit comprises a photoelectric coupler U3, a photoelectric coupler U4 and a diode U5, wherein a first pin of the photoelectric coupler U3 is electrically connected with a third pin of the photoelectric coupler U4, a second pin and a third pin of the photoelectric coupler U3 are grounded, and a fourth pin of the photoelectric coupler U3 is electrically connected with the PWM1 circuit; the fourth pin of the photocoupler U4 is electrically connected with the PWM circuit, the first pin of the photocoupler U4 is electrically connected with one end of a resistor R40 through a resistor R36, the other end of the resistor R40 is electrically connected with the R end of a diode U5 and one end of a resistor R41 respectively, wherein the other end of the resistor R41 is electrically connected with the A end of the diode U5, and the K end of the diode U5 is electrically connected with the second pin of the photocoupler U4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020118244.0U CN211606874U (en) | 2020-01-18 | 2020-01-18 | Control circuit for 0-10V small dimming quick start |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020118244.0U CN211606874U (en) | 2020-01-18 | 2020-01-18 | Control circuit for 0-10V small dimming quick start |
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| Publication Number | Publication Date |
|---|---|
| CN211606874U true CN211606874U (en) | 2020-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020118244.0U Active CN211606874U (en) | 2020-01-18 | 2020-01-18 | Control circuit for 0-10V small dimming quick start |
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| CN (1) | CN211606874U (en) |
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- 2020-01-18 CN CN202020118244.0U patent/CN211606874U/en active Active
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