CN203840589U - Circuit, driver and ballast, and lamp - Google Patents
Circuit, driver and ballast, and lamp Download PDFInfo
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- CN203840589U CN203840589U CN201420100988.4U CN201420100988U CN203840589U CN 203840589 U CN203840589 U CN 203840589U CN 201420100988 U CN201420100988 U CN 201420100988U CN 203840589 U CN203840589 U CN 203840589U
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- 238000001514 detection method Methods 0.000 claims abstract description 29
- 230000000630 rising effect Effects 0.000 claims description 9
- 239000004065 semiconductor Substances 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 description 9
- 238000001914 filtration Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
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
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Abstract
The utility model provides a circuit, comprising an input terminal, a first sub-circuit, and an output terminal. The first sub-circuit responds to a sudden change edge of a waveform inputted by the input terminal to generate overshoot in a generated response. The circuit is characterized by further comprising a second sub-circuit coupled to the input terminal and the output terminal; a detection device for detecting the sudden change edge of the waveform inputted by the input terminal; and a control device controlling a switch device to isolate the overshoot from the output terminal when the detection device detects the sudden change edge.
Description
Technical field
The utility model relates to the circuit for light modulation.
Background technology
The dimming interface of 0-10V or 1-10V be based on for example annex of technical standard IEC60929 " controlled by direct voltage " (1-10V) and BSR-ANSLG C82.11-2009 " for the low voltage control interface specification of controlled ballast " (0-10V).
Fig. 1 has provided the light adjusting circuit of current a kind of example.Wherein, D1 is rectifier diode.The brightness adjustment control of 0-10V or 1-10V is inputted the voltage clamping of the secondary coil L_s of transformer.The brightness adjustment control input of varying level by secondary coil voltage clamper at different level, thereby can be correspondingly by the drive level clamper of the main coil L_s of this transformer at different level.
Utility model content
In available circuit, normally the driving signal of high frequency is provided to transformer by resistance R 1 by drive current.In the time that high-frequency driving signal is undergone mutation, for example, while rising to high level from low level, due to the leakage inductance of transformer, main coil will produce due to voltage spikes.This due to voltage spikes is difficult to by RC filter R2 and the filtering of C1 institute, thus can cause the overshoot in the upper direct current dimmer voltage of exporting of C2, thereby direct current dimmer voltage is inaccurate.As shown in Figure 2, upper waveform shows the voltage on transformer main coil, and at the rising edge of the high-frequency signal of inputting, the voltage on transformer main coil has produced spike, as shown in circle.This spike cannot be completely by R2 and the filtering of C1 institute, and therefore the voltage on the C1 electric capacity shown in lower waveform exists overshoot, as shown in circle.
In order to address this problem, inventive concept of the present utility model is additionally to provide an elimination (blanking) part in circuit, in the time that overshoot produces, this overshoot is kept apart from output.
According to an aspect of the present utility model, a kind of circuit is provided, comprise input, the first electronic circuit and output, the sudden change of the waveform that described the first electronic circuit is inputted in response to described input along and in produced response, produce overshoot, it is characterized in that, described circuit also comprises: the second electronic circuit, be couple to described input and described output, comprise: switching device (Q1), is coupled to described output; Detection means, detects the sudden change edge of the waveform that described input inputs; And control device, described detection means detect described sudden change along time, control described switching device described overshoot kept apart from described output.
Above aspect of the present utility model avoids merely using filtering device to weaken passively spike, but the sudden change edge of input is detected, the overshoot on one's own initiative transformer spike being produced in the time that sudden change edge occurs is isolated from output, has avoided better overshoot to arrive output.
Further preferably, described the first electronic circuit comprises: adjustable end, for receiving adjustable control signal; Drive end, for receiving the waveform signal of inputting by described input, described waveform signal suddenlys change between the first level and second electrical level with period demand; And transformer, there is main coil (L_p) and secondary coil (L_s), wherein said secondary coil (L_s) is connected with described adjustable end and receives described control signal, described main coil (L_p) is connected with described drive end and receives described waveform signal, and described main coil (L_p) is connected to described output.
This preferred embodiment can be used in the spike problem causing due to the leakage inductance of transformer that solves.
Further preferably, described adjustable termination receive 0-10V for dim signal, described drive end receives and drives signal, described transformer is by producing response by described driving signal clamper to the level of described dim signal, and this response is exported at described output, wherein, at the rising edge of described driving signal, described transformer produces spike and causes overshoot in described response.
This preferred embodiment can solve the spike problem occurring in light adjusting circuit.
Further preferred, in described the second electronic circuit, described switching device comprises: be parallel to the switch element of described output, in the time of described switch element conducting, described response shunted from described output, thereby described overshoot is isolated from described output; Or be connected on the switch element between main coil and the described output of described transformer, in the time that described switch element turn-offs, avoid described response to arrive described output, thereby described overshoot is isolated from described output.
This preferred embodiment provides the connected mode of two kinds of switch elements, so that overshoot is kept apart from output.Be appreciated that and also exist other to realize the concrete connected mode of this function, the utility model does not repeat them here.
Further preferred, the described control device of described the second electronic circuit, after the certain hour detecting behind described sudden change edge, is controlled described switching device the response of described the first electronic circuit is exported by described output.
This second electronic circuit of preferred embodiment providing can also automatically switch back the state of conducting response later in overshoot, make circuit can normally export response.
Further preferred, in described the second electronic circuit, described detection means and described control device comprise: Detection capacitance (C3), and one end is connected to described input, and the other end is connected to the control end of described switching device; Detect resistance (R3), one end is connected to the end that is connected of described Detection capacitance (C3) and described switching device (Q1), and the other end is connected to the earth.
This preferred embodiment in, in the time that the rising edge of input waveform arrives, can charge to Detection capacitance through detecting resistance, charging current flows through and detects the control voltage that resistance produces switching device is controlled, the overshoot that the spike that its isolating transformer is produced causes.And after charging completes, lose the control voltage that charging current produces, and switching device can return to the state of conducting response, and the now overshoot in response is pass by, and therefore circuit output is without the normal response of overshoot.
Further preferred, described the second electronic circuit also comprises: Zener diode (D5), and Opposite direction connection is the end that is connected with described switching device (Q1) at described Detection capacitance (C3), and between the earth.
This preferred embodiment in, the control end of Zener diode protection switch device is avoided the damage of overvoltage.
Further preferred, described switch element (Q1) comprises transistor or metal-oxide-semiconductor, and wherein, in the time that described switch element (Q1) comprises transistor, described transistorized base stage is also connected with a resistance (R4).
Present embodiment has proposed to realize two kinds of more concrete implementations of switching device.
Correspondingly, the utility model also provides the LED driver comprising according to the circuit described in aforementioned arbitrary execution mode.
Correspondingly, the utility model also provides the electric ballast comprising according to the circuit described in aforementioned arbitrary execution mode.
Correspondingly, the utility model also provides the light fixture that comprises aforementioned LED driver or aforementioned electronic ballast.
Above and other aspect of the present utility model will more at large illustrate maybe and can be known by those skilled in the art with reference to the following drawings in embodiment part.
Brief description of the drawings
Fig. 1 shows the circuit structure of the existing light adjusting circuit based on transformer;
Fig. 2 shows the response and final output waveform of the available circuit based on Fig. 1;
Fig. 3 shows according to the circuit structure of the light adjusting circuit of an execution mode of the present utility model;
Fig. 4 shows according to the circuit structure of the light adjusting circuit of another execution mode of the present utility model.
Fig. 5 shows the response and final output waveform of the circuit of the execution mode of the present utility model based on Fig. 3 or Fig. 4.
Embodiment
An aspect of the present utility model provides a kind of circuit, comprise input, the first electronic circuit and output, the sudden change of the waveform that described the first electronic circuit is inputted in response to described input along and in produced response, produce overshoot, it is characterized in that, described circuit also comprises: the second electronic circuit, is couple to described input and described output, comprise: switching device (Q1), is coupled to described output; Detection means, detects the sudden change edge of the waveform that described input inputs; And control device, described detection means detect described sudden change along time, control described switching device described overshoot kept apart from described output.
As shown in Figure 3, with the utility model, the example that is applied as in the light adjusting circuit based on transformer is described the execution mode of utility model.
The first electronic circuit comprises: adjustable end, for receiving adjustable control signal; Drive end, for receiving the waveform signal of inputting by described input, described waveform signal suddenlys change between the first level and second electrical level with period demand; And transformer, there is main coil (L_p) and secondary coil (L_s), wherein said secondary coil (L_s) is connected with described adjustable end and receives described control signal, described main coil (L_p) is connected with described drive end and receives described waveform signal, and described main coil (L_p) is connected to described output.
More concrete, as shown in Figure 3, the diode D1 that secondary coil L_s connects by forward is connected to the regulated power supply of 0-10V.This regulated power supply more specifically can be realized by dimmer.Selected control voltage on regulated power supply, the voltage of for example dimmer voltage on will clamper secondary coil L_s.
What the main coil L_p of transformer accessed through resistance R 1 is to drive signal, and this driving signal is for example high-frequency PWM signal.Because the voltage on secondary coil L_s is by clamper, the peak value of the high-frequency PWM signal on main coil is also by clamper.But due to leakage inductance, in the time that the rising edge of pwm signal arrives, on transformer main coil L_p, will produce due to voltage spikes, as shown in the waveform of Fig. 2 middle and upper part.This spike can partly be absorbed by resistance R 2 and C1, but still cannot eliminate completely, thereby can produce overshoot in capacitor C 1, as shown in the waveform of Fig. 2 middle and lower part.
The second electronic circuit that execution mode of the present utility model provides provides in order to eliminate overshoot exactly.As shown in Figure 3, the switching device Q1 of the second electronic circuit is in parallel with capacitor C 1, is connected between the main coil and the earth of transformer.The detection means of the second electronic circuit and control device are jointly realized by Detection capacitance C3 and detection resistance R 3.One end of Detection capacitance C3 is connected to input access input waveform, and the other end is connected to the control end of switching device Q1, the grid of for example metal-oxide-semiconductor.Detect the end that is connected that one end of resistance R 3 is connected to Detection capacitance (C3) and switching device (Q1), the other end is connected to the earth.
Based on this annexation, in the time that the rising edge of input waveform arrives, input waveform can charge to capacitor C 3 through resistance R 3.Charging current forms voltage in resistance R 3, this voltage by be applied to switching device Q1 grid and drain electrode between and make switching device Q1 open.The output response of the main coil of transformer is diverted to the earth by Q1 after unlatching.Therefore, the spike/overshoot in output now response will be divided to the earth and can not charge to capacitor C 1.
Over time, along with C3 is full of completely.Resistance R 3 two ends are no longer for switching device Q1 provides bias voltage, and therefore Q1 can turn-off.Now, overshoot disappears, the normal response of main coil L_p output of transformer.Thereby this response can be switched on to capacitor C 1 and then output, so there will not be overshoot in capacitor C 1.The value of R3 and C3 is by the time that determines that Q1 gets back to off state from opening.The duration that this time should produce spike with transformer matches.
In above execution mode, switching device Q1 is connected in parallel on capacitor C 1 two ends to use as short circuit/diverting switch.Be appreciated that switching device Q1 exists other variations for reaching the available annexation of this function of filtering overshoot in circuit.For example, switching device Q1 can be connected between the main coil L_p and capacitor C 1 of transformer, in the time that switch element Q1 turn-offs, avoids the response on the main coil of transformer to arrive capacitor C 1, thereby overshoot is isolated from output.In this case, detection means and control device can do corresponding adjustment.These changes are all that one of ordinary skill in the art can be made under instruction of the present utility model, do not repeat them here.
Preferably, Zener diode D5 Opposite direction connection is the end that is connected with switching device Q1 at Detection capacitance C3, and between the earth.The function of D5 is to avoid the grid voltage of switching device Q1 too high and cause damaging.
Be appreciated that the switching device Q1 realizing with metal-oxide-semiconductor in Fig. 3 also can realize by transistor.Fig. 4 has provided the execution mode of such a variation.Between the base stage of transistor Q1 and Detection capacitance C3, be also connected with a resistance R 4.The base stage current-limiting resistance that this resistance R 4 is transistor Q1.
Fig. 5 shows response and the output waveform of the circuit of the execution mode of the present utility model based on Fig. 3 or Fig. 4.As shown in Figure 5, at the rising edge of the driving signal of inputting, the response of the main coil L_s of transformer is with spike, as shown in upper waveform.But due to the second electronic circuit when the rising edge by the response of the main coil of transformer and output C1 isolation, and spike later just by this response conducting to C1, so on C1, there is not overshoot, as shown in lower waveform.
Correspondingly, the utility model also provides the LED driver that comprises aforementioned circuit.
Correspondingly, the utility model also provides the electric ballast comprising according to circuit.
Correspondingly, the utility model also provides the light fixture that comprises aforementioned LED driver or aforementioned electronic ballast.
Those skilled in the art is to be understood that: it is for illustrative purposes and unrestricted that following explanation is provided.Those skilled in the art is understood that the utility model can realize with other implementation that departs from these details.And for not fuzzy the utility model, known function and structure and non-essential details in current explanation, are omitted.For example, at above execution mode, detection means and control device are jointly realized by Detection capacitance and detection resistance; Alternatively, also can use separately independently circuit part to assign to realize respectively detection means and control device.
Although diagram and described specific embodiment here, those of skill in the art will recognize that and can replace shown specific embodiment with any arrangement that is intended to reach same object, and the utility model has other application under other environment.The application is intended to cover any change of the present utility model or becomes example.Following claim never should be understood to that scope of the present utility model is restricted to specific embodiment described herein.
Claims (11)
1. a circuit, comprises input, the first electronic circuit and output, the sudden change of the waveform that described the first electronic circuit is inputted in response to described input along and in produced response, produce overshoot, it is characterized in that, described circuit also comprises:
The second electronic circuit, is couple to described input and described output, comprising:
-switching device (Q1), is coupled to described output;
-detection means, detects the sudden change edge of the waveform that described input inputs;
-control device, described detection means detect described sudden change along time, control described switching device described overshoot kept apart from described output.
2. circuit according to claim 1, is characterized in that, described the first electronic circuit comprises:
-adjustable end, for receiving adjustable control signal;
-drive end, for receiving the waveform signal of inputting by described input, described waveform signal suddenlys change between the first level and second electrical level with period demand;
-transformer, there is main coil (L_p) and secondary coil (L_s), wherein said secondary coil (L_s) is connected with described adjustable end and receives described control signal, described main coil (L_p) is connected with described drive end and receives described waveform signal, and described main coil (L_p) is connected to described output.
3. circuit according to claim 2, it is characterized in that, described adjustable termination receive 0-10V for dim signal, described drive end receives and drives signal, described transformer is by described driving signal clamper is produced to response to the level of described dim signal, and this response is exported at described output, wherein, at the rising edge of described driving signal, described transformer produces spike and causes described overshoot in described response.
4. circuit according to claim 1, is characterized in that, in described the second electronic circuit, described switching device comprises:
-be parallel to the switch element of described output, in the time of described switch element conducting, described response is shunted from described output, thereby described overshoot is isolated from described output; Or
-be connected on the switch element between main coil and the described output of described transformer, in the time that described switch element turn-offs, avoid described response to arrive described output, thereby described overshoot is isolated from described output.
5. circuit according to claim 1, is characterized in that, the described control device of described the second electronic circuit, after the certain hour detecting behind described sudden change edge, is controlled described switching device the response of described the first electronic circuit is exported by described output.
6. circuit according to claim 1 or 5, is characterized in that, in described the second electronic circuit, described detection means and described control device comprise:
-Detection capacitance (C3), one end is connected to described input, and the other end is connected to the control end of described switching device;
-detect resistance (R3), one end is connected to the end that is connected of described Detection capacitance (C3) and described switching device (Q1), and the other end is connected to the earth.
7. circuit according to claim 6, is characterized in that, described the second electronic circuit also comprises:
-Zener diode (D5), Opposite direction connection is the end that is connected with described switching device (Q1) at described Detection capacitance (C3), and between the earth.
8. circuit according to claim 4, wherein, described switch element (Q1) comprises transistor or metal-oxide-semiconductor,
Wherein, in the time that described switch element (Q1) comprises transistor, described transistorized base stage is also connected with a resistance (R4).
9. a LED driver, is characterized in that, comprises according to the circuit described in any one in claim 1 to 8.
10. an electric ballast, is characterized in that, comprises according to the circuit described in any one in claim 1 to 8.
11. 1 kinds of light fixtures, is characterized in that, comprise LED driver according to claim 9 or electric ballast according to claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420100988.4U CN203840589U (en) | 2014-03-06 | 2014-03-06 | Circuit, driver and ballast, and lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420100988.4U CN203840589U (en) | 2014-03-06 | 2014-03-06 | Circuit, driver and ballast, and lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203840589U true CN203840589U (en) | 2014-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420100988.4U Expired - Fee Related CN203840589U (en) | 2014-03-06 | 2014-03-06 | Circuit, driver and ballast, and lamp |
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| CN (1) | CN203840589U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107432064A (en) * | 2015-03-17 | 2017-12-01 | 飞利浦照明控股有限公司 | LED tubular lamp |
-
2014
- 2014-03-06 CN CN201420100988.4U patent/CN203840589U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107432064A (en) * | 2015-03-17 | 2017-12-01 | 飞利浦照明控股有限公司 | LED tubular lamp |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170323 Address after: The city of Eindhoven in Holland Patentee after: KONINKL PHILIPS NV Address before: The city of Eindhoven in Holland Patentee before: Koninkl Philips Electronics NV |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 Termination date: 20190306 |
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| CF01 | Termination of patent right due to non-payment of annual fee |