CN117678324A - Power supply circuit, DALI module, lighting device and control method - Google Patents
Power supply circuit, DALI module, lighting device and control method Download PDFInfo
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- CN117678324A CN117678324A CN202180099386.4A CN202180099386A CN117678324A CN 117678324 A CN117678324 A CN 117678324A CN 202180099386 A CN202180099386 A CN 202180099386A CN 117678324 A CN117678324 A CN 117678324A
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- 230000033228 biological regulation Effects 0.000 claims abstract description 33
- 230000001105 regulatory effect Effects 0.000 claims abstract description 26
- 239000003990 capacitor Substances 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 8
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/175—Controlling the light source by remote control
- H05B47/18—Controlling the light source by remote control via data-bus transmission
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
- H05B45/56—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving measures to prevent abnormal temperature of the LEDs
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- H05B47/183—
Abstract
A power supply circuit, a Digital Addressable Lighting Interface (DALI) module, a lighting device, and a control method. The power supply circuit includes: a power supply circuit (100); a regulating transistor (Q161) configured to be connected between the power supply circuit and a first output port (da+); a first controller (U160) configured to control the regulating transistor (Q161) to be turned on or off; and a current regulation controller (a) configured to be connected between the power supply circuit and a second output port (DA-) and further connected between the regulation transistor (Q161) and the first controller (U160), the current regulation controller (a) reducing the current flowing through the regulation transistor (Q161) when the current of the second output port (DA-) is greater than a preset value.
Description
Technical Field
Embodiments of the present disclosure relate generally to the field of lighting, and more particularly, to a power supply circuit, a DALI (digital addressable lighting interface) module, a lighting fixture, and a control method.
Background
This section presents a simplified summary that may facilitate a better understanding of aspects of the disclosure. Accordingly, the statements of this section are to be read in this light, and not as admissions of prior art.
DALI (digital addressable lighting interface) is a data transfer protocol that defines a digital communication method between a lighting device and a controller. The DALI system is an intelligent lighting control system that can be used not only for lighting control in a room but also for connection with a Building Management System (BMS). The most important feature of the DALI system is that each lighting device has an independent address, and that the lighting devices can be dimmed accurately by the DALI system. The lighting means are for example LEDs (light emitting diodes).
The DALI circuit provides a DALI communication bus, which may include a data bus and a power bus. The lighting device and the peripheral device may be connected to a communication bus.
Disclosure of Invention
DALI circuits employing a 50mA constant current source can drive more peripheral devices on the DALI communication bus, thus making the DALI lighting system more powerful. The peripheral devices may be dimmers, sensors, controllers, security devices, or the like.
The DALI circuit may comprise an NTC (negative temperature coefficient) resistor for compensating for a temperature drift of a PN junction in the DALI circuit so that a constant current can be obtained during operation of the DALI circuit.
The inventors found that: in the DALI circuit, it is always difficult for the NTC resistor to compensate for the temperature drift of the PN junction, so the accuracy of the current output from the DALI circuit is low.
In general, embodiments of the present disclosure provide power supply circuits, DALI (digital addressable lighting interface) circuits, lighting devices, and control methods. In the above embodiment, a current regulation controller is provided in the power supply circuit, and when the current of the second output port (DA-) is greater than a preset value, the current regulation controller will decrease the current flowing through the regulating transistor (Q161). Thus, a current with higher accuracy can be obtained.
In a first aspect, there is provided a power supply circuit comprising:
a power supply circuit (100);
a regulating transistor (Q161) configured to be connected between the power supply circuit and a first output port (da+);
a first controller (U160) configured to control the regulating transistor (Q161) to be turned on or off; and
a current regulation controller (A) configured to be connected between the power supply circuit and a second output port (DA-) and also connected between the regulation transistor (Q161) and the first controller (U160),
when the current of the second output port (DA-) is greater than a preset value, the current regulation controller (A) decreases the current flowing through the regulating transistor (Q161).
According to one embodiment, the current regulation controller (a) comprises:
a first resistor (R162) configured to be connected between a control terminal of the regulating transistor (Q161) and the first controller (U160);
a first transistor (Q160) configured to be connected between the power supply circuit and the control terminal of the regulating transistor (Q161);
a voltage reference circuit (U1);
a second resistor (R164); and
a third resistor (R170),
the voltage reference circuit (U1), the second resistor (R164) and the third resistor (R170) are connected in series between the power supply circuit and a ground terminal,
the control terminal of the first transistor (Q160) is connected to the connection node of the second resistor (R164) and the third resistor (R170),
the anode of the voltage reference circuit (U1) is connected to the ground terminal,
the cathode of the voltage reference circuit (U1) is connected to the third resistor (R170),
the reference terminal of the voltage reference circuit (U1) receives a voltage corresponding to the current of the second output port (DA-).
According to one embodiment, the current regulation controller (a) further comprises:
a fourth resistor (R174) and a first capacitor (C161),
the fourth resistor (R174) and the first capacitor (C161) are connected in series between the power supply circuit and the reference terminal of the voltage reference circuit (U1).
According to one embodiment, the power supply circuit further comprises:
a current stage selection circuit (B) configured to be connected between the first output port (DA+) and the second output port (DA-),
the current level selection circuit (B) includes:
a fifth resistor (R171);
a sixth resistor (R168); and
a second transistor (Q162),
the fifth resistor (R171) and the sixth resistor (R168) are connected in series between the second output port (DA-) and the ground terminal,
the second transistor (Q162) is connected in parallel with the sixth resistor (R168).
According to one embodiment, the second transistor (Q162) is turned off when the first output port (da+) is shorted to the second output port (DA-).
According to one embodiment, the current level selection circuit (B) further comprises:
a seventh resistor (R161);
an eighth resistor (R163); and
a ninth resistor (R172),
the seventh resistor (R161), the eighth resistor (R163) and the ninth resistor (R172) are connected in series between the first output port (DA+) and the ground terminal,
the control terminal of the second transistor (Q162) is connected to the connection node of the eighth resistor (R163) and the ninth resistor (R172).
In a second aspect, there is provided a Digital Addressable Lighting Interface (DALI) module comprising a DALI interface circuit and a power supply circuit according to the first aspect, the power supply circuit providing power to the DALI interface circuit and the peripheral device via a DALI communication bus.
In a third aspect, there is provided a lighting device comprising a lighting apparatus, a Digital Addressable Lighting Interface (DALI) module according to the second aspect, and a driver, the DALI circuit controlling the driver to drive the lighting device.
In a fourth aspect, there is provided a control method of the electric power supply circuit according to the first aspect, the control method including:
when the current of the second output port (DA-) is greater than a preset value, the current regulation controller (A) decreases the current flowing through the regulating transistor (Q161).
According to one embodiment, the method further comprises:
when the first output port (DA+) is shorted to the second output port (DA-), the second transistor (Q162) is turned off.
According to various embodiments of the present disclosure, a current regulation controller is provided in the power supply circuit that will reduce the current flowing through the regulating transistor (Q161) when the current of the second output port (DA-) is greater than a preset value. Thus, a current with higher accuracy can be obtained.
Drawings
The above and other aspects, features and advantages of various embodiments of the present disclosure will become more apparent, by way of example, from the following detailed description with reference to the accompanying drawings in which like reference numerals or letters are used to designate like or equivalent elements. The figures are illustrated for the sake of a better understanding of the embodiments of the disclosure and are not necessarily drawn to scale, wherein:
fig. 1 is a diagram of a power supply circuit according to a first aspect of an embodiment of the present disclosure;
FIG. 2 is a graphical representation of the current output by the power supply circuit before and after a DALI interface short circuit;
fig. 3 is a flowchart of a control method of the power supply circuit 10;
FIG. 4 is a diagram of a DALI module of a third aspect of an embodiment;
fig. 5 is an illustration of a lighting device of a fourth aspect of an embodiment.
Detailed Description
The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only in order to enable those skilled in the art to better understand the present disclosure and thus practice the present disclosure, and are not intended to limit the scope of the present disclosure in any way.
The terms "first" and "second" as used herein refer to different elements. The singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. As used herein, the terms "comprises," "comprising," "includes," "including," "having," "containing," and/or "containing" specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. The term "based on" should be understood as "based at least in part on". The terms "one embodiment" and "an embodiment" should be understood as "at least one embodiment". The term "another embodiment" should be understood as "at least one other embodiment". Other explicit and implicit definitions may be included below.
First aspect of the embodiments
In a first embodiment, a power supply circuit is provided.
Fig. 1 is a diagram of a power supply circuit according to an embodiment of the present disclosure.
As shown in fig. 1, the power supply circuit 10 includes a power supply circuit 100, a regulating transistor Q161, a first controller U160, and a current regulating controller a.
The power supply circuit 100 may provide Direct Current (DC) power. For example, the power supply circuit 100 may include an inductor L60-a, a diode D160, and two capacitors C160, C66. The power supply circuit 100 may convert Alternating Current (AC) power to DC power.
The regulating transistor Q161 is configured to be connected between the power supply circuit 100 and the first output port da+. For example, the regulating transistor Q161 is a PNP bipolar transistor, an emitter thereof is connected to the resistor R167, and a collector thereof is connected to the anode of the diode D161. Resistor R167 is connected between the cathode of diode D160 and the emitter of regulating transistor Q161. The cathode of the diode D161 is connected to the first output port da+.
The first controller U160 is configured to control the adjusting transistor Q161 to be turned on or off. For example, the first controller U160 is an Optocoupler (OC). The first resistor R162 is connected between a control terminal (e.g., base) of the regulating transistor Q161 and the first controller U160. When the "enable" signal is supplied to the resistor R100, the transistor Q102 is turned on, and the first controller U160 pulls down the voltage of the control terminal of the regulating transistor Q161, thereby turning on the regulating transistor Q161.
The current regulation controller a is configured to be connected between the power supply circuit 100 and the second output port DA-. The current regulation controller a is further connected between the regulation transistor Q161 and the first controller U160.
In one embodiment, when the current of the second output port DA-is greater than the preset value, the current regulation controller a decreases the current flowing through the regulation transistor Q161. Thus, feedback control is realized, and a current of higher accuracy can be obtained.
As shown in fig. 1, the current regulation controller a includes: a first resistor R162, a first transistor Q160, a voltage reference circuit U1, a second resistor R164, and a third resistor 170.
As described above, the first resistor R162 is configured to be connected between the control terminal of the adjusting transistor Q161 and the first controller U160.
The first transistor Q160 is configured to be connected between the power supply circuit and the control terminal of the adjustment transistor Q161. The first transistor Q160 may be a PNP bipolar transistor. The emitter of the first transistor Q160 is connected to the cathode of the diode D160 via a resistor R173.
The voltage reference circuit U1, the second resistor R164, and the third resistor R170 are connected in series between the power supply circuit 100 and the ground terminal (GND).
A control terminal (e.g., base) of the first transistor Q160 is connected to a connection node of the second resistor R164 and the third resistor R170.
The anode (1) of the voltage reference circuit U1 is connected to the ground terminal (gnd_dalisps), the cathode (2) of the voltage reference circuit U1 is connected to the third resistor R170, and the reference terminal (3) of the voltage reference circuit U1 receives a voltage corresponding to the current of the second output port DA-. The voltage reference circuit U1 may be TL431.
The current regulation controller a further includes: a fourth resistor R174 and a first capacitor C161. The fourth resistor R174 and the first capacitor C161 are connected in series between the power supply circuit and the reference terminal of the voltage reference circuit U1.
When the reference terminal (3) of the voltage reference circuit U1 receives a voltage higher than a threshold value (e.g., the voltage threshold value corresponds to a preset value of current), the voltage reference circuit U1 is turned on, and the current flows through the resistor R173, the second resistor R164, the third resistor R170, the voltage reference circuit U1 to the ground terminal. The voltage drop across the second resistor R164 turns on the first transistor Q160. In addition, the voltage received by the reference terminal (3) of the voltage reference circuit U1 is applied to the emitter of the first transistor Q160. The turn-on of the first transistor Q160 increases the current flowing through the first resistor R162, thereby pulling up the voltage of the control terminal of the regulating transistor Q161, and reducing the conduction current flowing through the regulating transistor Q161. Thus, the conduction current can be kept constant, and an accuracy of 1% is easily achieved.
As shown in fig. 1, the power supply circuit 10 further includes a current level selection circuit B. The current stage selection circuit B is configured to be connected between the first output port da+ and the second output port DA-.
For example, the current level selection circuit B may include a fifth resistor R171, a sixth resistor R168, and a second transistor Q162.
The fifth resistor R171 and the sixth resistor R168 are connected in series between the second output port DA-and the ground terminal (gnd_dalps). The second transistor Q162 is connected in parallel with the sixth resistor R168. For example, the second transistor Q162 may be a MOS FET such as 2N7002, the source of the second transistor Q162 is connected to a ground terminal, and the drain of the second transistor Q162 is connected to a connection node between the fifth resistor R171 and the sixth resistor R168. The resistance of the sixth resistor R168 may be 2 times higher than that of the fifth resistor R171, for example, the resistance of the sixth resistor R168 may be 150Ω and the resistance of the fifth resistor R171 may be 50Ω.
When the first output port da+ and the second output port DA-are not short-circuited, the second transistor Q162 is turned on, and a current flows from the second output port DA-through the fifth resistor R171 to the ground terminal (gnd_dalisps), for example, a current of 50mA. When the first output port da+ and the second output port DA-are short-circuited (e.g., DALI interface is short-circuited), the second transistor Q162 is turned off, and the current flows from the second output port DA-through the fifth resistor R171 and the sixth resistor R168 to the ground terminal (gnd_dalisps), and the current flowing from the second output port DA-to the ground terminal (gnd_dalisps) decreases, e.g., the current decreases to 10mA-11mA.
In at least one embodiment, as shown in fig. 1, the current level selection circuit B further includes: a seventh resistor R161, an eighth resistor R163, and a ninth resistor R172. The seventh resistor R161, the eighth resistor R163, and the ninth resistor R172 are connected in series between the first output port da+ and the ground terminal. A control terminal (e.g., gate) of the second transistor Q162 is connected to a connection node of the eighth resistor R163 and the ninth resistor R172.
The current level selection circuit B may further include: diode D163 and Zenar diode Z161. The cathode of the diode D163 is connected to the cathode of the Zenar diode Z161, the anode of the diode D163 is connected to the anode of the diode D161, and the anode of the Zenar diode Z161 is connected to the anode of the seventh resistor R161.
In at least one embodiment, when the first output port da+ and the second output port DA-are not shorted, the reverse breakdown Zenar diode Z161, current flows through the seventh resistor R161, the eighth resistor R163, and the ninth resistor R172. The voltage drop across the ninth resistor R172 provides Vgs to turn on the second transistor Q162 and current flows from the second output port DA-through the fifth resistor R171 to the ground terminal (gnd_dalps). In this case, the fifth resistor R171 operates as a current sense resistor.
In at least one embodiment, when the first output port da+ and the second output port DA-are short-circuited, no current flows through the seventh resistor R161, the eighth resistor R163, and the ninth resistor R172, so that the second transistor Q162 is turned off. Current flows from the second output port DA-through the fifth resistor R171 and the sixth resistor R168 to the ground terminal (gnd_dalisps). In this case, the fifth resistor R171 and the sixth resistor R168 operate as current sensing resistors.
Fig. 2 is a graphical representation of the current output by the power supply circuit before and after a DALI interface short circuit. In fig. 2, the horizontal axis represents time, and the vertical axis represents a current value. As shown in fig. 2, the current is still 50mA before the DALI interface is shorted. During the delay from the DALI interface short, the current linearly drops to 11mA. Finally, the current stabilized at 11mA.
According to the first aspect of the embodiment, by employing the current regulation controller a, the accuracy of the current output from the power supply circuit 10 is improved.
According to the first aspect of the embodiment, by using the current stage selection circuit B, when the first output port da+ and the second output port DA-are short-circuited, the current of the power supply circuit 10 is reduced, thereby saving energy when the DALI interface is short-circuited.
Second aspect of the embodiment
A control method of a power supply circuit is provided. In a first aspect of an embodiment, a power supply circuit is provided. Those same as those in the first aspect of the embodiment are omitted.
Fig. 3 shows a flowchart of a control method of the power supply circuit 10.
As shown in fig. 3, the method 30 includes:
block 31: when the current of the second output port (DA-) is greater than a preset value, the current regulation controller (A) reduces the current flowing through the regulation transistor (Q161).
As shown in fig. 3, the method 30 further includes:
block 32: when the first output port (DA+) is shorted to the second output port (DA-), the second transistor (Q162) is turned off.
According to the second aspect of the embodiment, the accuracy of the current output by the power supply circuit 10 is improved, and energy is saved when the DALI interface is short-circuited.
Third aspect of the embodiment
In one embodiment, a Digital Addressable Lighting Interface (DALI) module is provided.
Fig. 4 is a diagram of a DALI module of a third aspect of an embodiment. As shown in fig. 4, the DALI module 40 includes a power supply circuit 10 and a DALI interface circuit 30. In a first aspect of the embodiment, the power supply circuit 10 is described.
The power supply circuit 10 supplies power to the DALI interface circuit 30 and the peripheral devices via the DALI communication bus.
The peripheral devices may be dimmers, sensors, controllers, security devices, or the like.
A schematic of the DALI interface circuit 30 is shown in fig. 4. As shown in fig. 4, DALI interface circuit 30 may include resistors R142, R143, R145, R147, R148, R149, R150; capacitors C03, C142, C140, C144, C146, C147, C148; transistors Q140, Q141, Q142, Q143, Q145; zenar diode Z140; diode bridge D140; optocouplers U140 and U141.
Fourth aspect of the embodiment
In one embodiment, a lighting device is provided.
Fig. 5 is an illustration of a lighting device. As shown in fig. 5, the lighting device 50 includes a lighting apparatus (not shown), a Digital Addressable Lighting Interface (DALI) module 40, and a driver 60. The DALI module 40 is provided according to a third aspect of the embodiment. For example, the DALI module 40 includes a power supply circuit 10 and a DALI interface circuit 30.
The driver 60 may supply Direct Current (DC) power to the lighting device. The driver 60 may be an LED driver and the lighting device may be an LED device. The DALI interface circuit 30 controls the driver 60 to drive the lighting device.
The output power, output voltage or output current of the lighting device may vary between a minimum value to a maximum value depending on a dimming signal (e.g. 1V-10V) received via DALI (digital addressable lighting interface), NFC (near field communication), bluetooth, etc. Preferably, the DC-DC converter supplies that the lighting device will change its output parameters (current and/or voltage) in accordance with the dimming signal.
In addition, while operations are illustrated in a particular order, this should not be construed as requiring that such operations be performed in the particular order illustrated or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In some cases, multitasking and parallel processing may be advantageous. Also, while several specific implementation details are included in the above discussion, these specific implementation details should not be construed as limiting the scope of the present disclosure, but as descriptions of features that may be specific to particular embodiments. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.
Although the disclosure has been described in language specific to structural features and/or methodological acts, it is to be understood that the disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Claims (10)
1. A power supply circuit, the power supply circuit comprising:
a power supply circuit (100);
a regulating transistor (Q161) configured to be connected between the power supply circuit and a first output port (da+);
a first controller (U160) configured to control the regulating transistor (Q161) to be turned on or off; and
a current regulation controller (A) configured to be connected between the power supply circuit and a second output port (DA-) and also connected between the regulation transistor (Q161) and the first controller (U160),
wherein the current regulation controller (A) decreases the current through the regulation transistor (Q161) when the current of the second output port (DA-) is greater than a preset value.
2. The power supply circuit of claim 1, wherein,
the current regulation controller (A) includes:
-a first resistor (R162) configured to be connected between a control terminal of the regulating transistor (Q161) and the first controller (U160);
a first transistor (Q160) configured to be connected between the power supply circuit and the control terminal of the regulating transistor (Q161);
a voltage reference circuit (U1);
a second resistor (R164); and
a third resistor (R170),
the voltage reference circuit (U1), the second resistor (R164) and the third resistor (R170) are connected in series between the power supply circuit and a ground terminal,
the control terminal of the first transistor (Q160) is connected to the connection node of the second resistor (R164) and the third resistor (R170),
an anode of the voltage reference circuit (U1) is connected to the ground terminal,
the cathode of the voltage reference circuit (U1) is connected to the third resistor (R170),
a reference terminal of the voltage reference circuit (U1) receives a voltage corresponding to the current of the second output port (DA-).
3. The power supply circuit according to claim 2, wherein,
the current regulation controller (a) further includes:
a fourth resistor (R174) and a first capacitor (C161),
the fourth resistor (R174) and the first capacitor (C161) are connected in series between the power supply circuit and the reference terminal of the voltage reference circuit (U1).
4. The power supply circuit of claim 2, wherein the power supply circuit further comprises:
a current stage selection circuit (B) configured to be connected between the first output port (DA+) and the second output port (DA-),
the current level selection circuit (B) includes:
a fifth resistor (R171);
a sixth resistor (R168); and
a second transistor (Q162),
the fifth resistor (R171) and the sixth resistor (R168) are connected in series between the second output port (DA-) and the ground terminal,
the second transistor (Q162) is connected in parallel with the sixth resistor (R168).
5. The power supply circuit according to claim 4, wherein,
when the first output port (DA+) is short-circuited with the second output port (DA-), the second transistor (Q162) is turned off.
6. The power supply circuit according to claim 4, wherein,
the current level selection circuit (B) further includes:
a seventh resistor (R161);
an eighth resistor (R163); and
a ninth resistor (R172),
the seventh resistor (R161), the eighth resistor (R163) and the ninth resistor (R172) are connected in series between the first output port (DA+) and the ground terminal,
a control terminal of the second transistor (Q162) is connected to a connection node of the eighth resistor (R163) and the ninth resistor (R172).
7. A Digital Addressable Lighting Interface (DALI) module comprising DALI interface circuitry and a power supply circuit as claimed in any one of claims 1 to 6, wherein,
the power supply circuit provides power to the DALI interface circuit and peripheral devices via a DALI communication bus.
8. A lighting device comprising a lighting apparatus, a Digital Addressable Lighting Interface (DALI) module of claim 7, and a driver, wherein,
the DALI module controls the driver to drive the lighting device.
9. A control method of an electric power supply circuit, the electric power supply circuit comprising:
a power supply circuit;
a regulating transistor (Q161) configured to be connected between the power supply circuit and a first output port (da+);
a first controller (U160) configured to control the regulating transistor (Q161) to be turned on or off; and
a current regulation controller (A) configured to be connected between the power supply circuit and a second output port (DA-) and also connected between the regulation transistor (Q161) and the first controller (U160),
the control method comprises the following steps:
the current regulation controller (A) decreases the current through the regulation transistor (Q161) when the current of the second output port (DA-) is greater than a preset value.
10. The control method of an electric power supply circuit according to claim 9, wherein,
wherein the power supply circuit further comprises:
a current stage selection circuit (B) configured to be connected between the first output port (DA+) and the second output port (DA-),
the current level selection circuit (B) includes:
a fifth resistor (R171);
a sixth resistor (R168); and
a second transistor (Q162),
the fifth resistor (R171) and the sixth resistor (R168) are connected in series between the second output port (DA-) and the ground terminal,
the second transistor (Q162) is connected in parallel with the sixth resistor (R168),
the method further comprises the steps of:
when the first output port (DA+) is short-circuited with the second output port (DA-), the second transistor (Q162) is turned off.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2021/100065 WO2022261818A1 (en) | 2021-06-15 | 2021-06-15 | Power supply circuit, dali module, lighting equipment and controlling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117678324A true CN117678324A (en) | 2024-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180099386.4A Pending CN117678324A (en) | 2021-06-15 | 2021-06-15 | Power supply circuit, DALI module, lighting device and control method |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4335244A1 (en) |
| CN (1) | CN117678324A (en) |
| WO (1) | WO2022261818A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8111014B2 (en) * | 2006-06-26 | 2012-02-07 | Koninklijke Philips Electronics N.V. | Drive circuit for driving a load with constant current |
| DE102009009535A1 (en) * | 2009-02-18 | 2010-08-19 | Osram Gesellschaft mit beschränkter Haftung | Circuit for driving a control gear for a light application, operating device and method for operating the circuit |
| KR102550413B1 (en) * | 2016-01-13 | 2023-07-05 | 삼성전자주식회사 | Led driving apparatus and lighting apparatus |
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2021
- 2021-06-15 EP EP21945411.3A patent/EP4335244A1/en active Pending
- 2021-06-15 WO PCT/CN2021/100065 patent/WO2022261818A1/en active Application Filing
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| EP4335244A1 (en) | 2024-03-13 |
| WO2022261818A1 (en) | 2022-12-22 |
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