CN210609798U - Power supply driving equipment automatically matched with multi-specification light source load and lamp - Google Patents
Power supply driving equipment automatically matched with multi-specification light source load and lamp Download PDFInfo
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- CN210609798U CN210609798U CN201921045593.8U CN201921045593U CN210609798U CN 210609798 U CN210609798 U CN 210609798U CN 201921045593 U CN201921045593 U CN 201921045593U CN 210609798 U CN210609798 U CN 210609798U
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Abstract
The utility model provides a with automatic power supply drive equipment and lamps and lanterns that match of many specifications light source load, power supply drive equipment includes digital power source drive and feedback circuit, wherein, power supply drive equipment includes detection mode and normal operating mode, under the detection mode, first controller provides first voltage to feedback circuit through drive circuit, feedback circuit provides feedback signal to first controller through first detection resistance, first controller is after the feedback signal who acquires accords with predefined format, power supply drive equipment gets into normal operating mode, first controller provides to feedback circuit through drive circuit and predetermines voltage, feedback circuit is out of work, and treat that the drive light source is luminous. Therefore, the first controller knows the working requirement of the light source through the feedback information of the feedback circuit in the detection mode and provides the voltage meeting the working requirement of the light source for the light source in the normal working mode, so that one power supply driving device can be automatically matched with light source loads of various specifications.
Description
Technical Field
The utility model relates to a lamps and lanterns drive technical field especially relates to a power supply drive equipment and lamps and lanterns with automatic matching of many specifications light source load.
Background
In a conventional LED lamp, the driving power supplies need to match the current or power of the lamp one by one, and therefore, a plurality of lamps with different specifications may need to match a plurality of driving power supplies with different specifications. Although the traditional digital drive can match lamps with different specifications, the traditional digital drive can be matched with the lamps with different specifications only by manually setting or increasing wiring and the like.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention has been made to provide a power supply driving apparatus and a lamp for multi-specification light source load automatic matching that overcome the above problems or at least partially solve the above problems.
According to the utility model discloses an aspect provides a with many specifications light source load automatic matching's power supply drive equipment, including digital power drive and the feedback circuit who has input, feedback end, wherein, digital power drive, including first controller, the drive circuit who has input, output and first detection resistance, first controller has PWM end and ADC end, and the PWM end is connected the drive circuit input, and the output of drive circuit is connected the input of feedback circuit and is waited to drive the light source positive pole, and the ADC end is connected the feedback end and the first detection resistance of feedback circuit;
the power supply driving device comprises a detection mode and a normal working mode, wherein in the detection mode, the first controller provides a first voltage to the feedback circuit through the driving circuit; the feedback circuit provides a feedback signal to the first controller through the first detection resistor; after the acquired feedback signal conforms to a predefined format, the first controller enables the power supply driving equipment to enter a normal working mode;
in the normal working mode, the first controller provides preset voltage for the feedback circuit through the driving circuit, the feedback circuit does not work, and the light source to be driven emits light; wherein the preset voltage is determined according to the feedback signal of the predefined format.
Optionally, the feedback circuit comprises: a constant voltage power supply circuit, a high voltage shutdown circuit, and a second controller, wherein,
the constant voltage power supply circuit is provided with an input end and an output end, the input end of the constant voltage power supply circuit is used as the input end of the feedback circuit and is connected with the output end of the driving circuit, the output end of the constant voltage power supply circuit is connected with the second controller, and the constant voltage power supply circuit is configured to provide constant voltage for the second controller when receiving the first voltage output by the driving circuit; and stopping supplying power to the second controller after receiving a preset voltage output by the driving circuit;
the high-voltage turn-off circuit is provided with an input end and a control end, the input end is connected with the output end of the driving circuit, the control end is connected with the constant-voltage power supply circuit, and the high-voltage turn-off circuit is configured to turn off the connection between the constant-voltage power supply circuit and the driving circuit when receiving a preset voltage output by the driving circuit;
the second controller is provided with a power supply end and an output end, the power supply end is connected with the output end of the constant voltage power supply circuit, the output end of the second controller is used as a feedback end of the feedback circuit to be connected with the ADC end, and the second controller is configured to generate corresponding feedback signals of high and low levels in a predefined format according to preset specification parameters of the light source and feed the feedback signals back to the ADC end after receiving the power supply of the constant voltage power supply circuit.
Optionally, the constant voltage supply circuit includes: a resistor R2, a voltage regulator tube Z1, a resistor R5 and a triode Q3,
one end of the resistor R2 is used as the input end of a constant voltage power supply circuit and is connected with the output end of the driving circuit and one end of the resistor R5, the other end of the resistor R2 is connected with the cathode of the voltage-stabilizing tube Z1, and the anode of the voltage-stabilizing tube Z1 is connected with the cathode of the light source;
the other end of the resistor R5 is connected with the collector of the triode Q3, the emitter of the triode Q3 is used as the output end of the constant voltage power supply circuit and is connected with the power supply end of the second controller, and the base is connected with the connection point of the resistor R2 and the voltage regulator tube Z1;
after the driving circuit outputs a first voltage, the first voltage reaches the conducting voltage of the triode Q3, the triode Q3 is conducted, and the voltage regulator tube Z1 is used for providing a stable voltage for the second controller.
Optionally, the high voltage shutdown circuit comprises: a triode Q2, a voltage regulator tube Z2, a resistor R3 and a resistor R4 which are sequentially connected in series between the output end of the drive circuit and the cathode of the light source,
the cathode of the voltage-stabilizing tube Z2 is used as the input end of the high-voltage turn-off circuit and is connected with the output end of the driving circuit;
the base electrode of the triode Q2 is connected with the connection point of the resistor R3 and the resistor R4, the collector electrode is used as the control end of the high-voltage turn-off circuit and is connected with the cathode of the voltage regulator tube Z1, and the emitter electrode is connected with the cathode of the light source; one end of the resistor R4, which is not connected with the resistor R3, is connected with the cathode of the light source;
after the driving circuit outputs the preset voltage, the triode Q2 is switched on and controls the triode Q3 to be switched off, and then the constant-voltage power supply circuit is controlled not to supply power to the second controller any more.
Optionally, the power supply driving apparatus further includes:
and the current increasing circuit is provided with an input end and an output end, the input end of the current increasing circuit is connected with the output end of the second controller, the output end of the current increasing circuit is connected with the ADC end and the first detection resistor, and the current increasing circuit is configured to increase the current of a feedback signal when receiving a high-level feedback signal output by the second controller.
Optionally, the current increasing circuit comprises: a resistor R6, a resistor R1, and a transistor Q1, wherein,
the base electrode of the triode Q1 is connected with one end of the resistor R6, the collector electrode of the triode Q1 is connected with one end of the resistor R1, and the emitter electrode of the triode Q1 is used as the output end of the current increasing circuit and is connected with the first detection resistor;
the other end of the resistor R6 is used as the input end of the current increasing circuit and is connected with the output end of the second controller, and the other end of the resistor R1 is connected with the output end of the constant-voltage power supply circuit.
Optionally, the first detection resistor is further connected to the negative electrode of the light source, and is further configured to provide a current and/or voltage signal of the light source in a light-emitting state to the first controller, so that the first controller can detect the operating state of the light source.
Optionally, the digital power driver further comprises:
and the switching tube is provided with a first end, a second end and a control end, the first end and the second end are connected with the first detection resistor in parallel, the control end receives a control signal of the first controller or the external voltage control circuit, and the control end is configured to control the switching tube to be conducted by utilizing the control signal after the driving circuit outputs a preset voltage so as to short-circuit the first detection resistor.
Optionally, the digital power driver further comprises:
the second detection resistor is connected with the switch tube in series and is configured to control the switch tube to be conducted by using the control signal after the driving circuit outputs a preset voltage, so that a current and/or voltage signal of the light source in a light-emitting state is provided to the first controller, and the first controller can detect the working state of the light source;
the resistance value of the second detection resistor is smaller than that of the first detection resistor.
Optionally, the switch tube includes a triode or a MOS tube.
The foundation the utility model discloses another aspect still provides a lamps and lanterns, include:
the power supply driving device automatically matched with the multi-specification light source load in any embodiment above;
and the light source load is connected with the power supply driving device.
The embodiment of the utility model provides an in, power supply drive device is including detection mode and normal operating mode, and under the detection mode, first controller through drive circuit to feedback circuit provides first voltage, makes feedback circuit work and the light source is not lighted. The feedback circuit feeds back information in a predefined format generated according to the specification parameters of the light source to the first controller so as to feed back the voltage required by the normal operation of the light source to the first controller. After the first controller detects the information of the predefined format in the detection mode, the preset voltage meeting the working requirement of the light source is determined, the power supply driving equipment enters a normal working mode, and the first controller raises the output voltage of the driving circuit to the preset voltage meeting the working requirement of the light source in the normal working mode, so that automatic matching with the light source load is realized. Namely the embodiment of the utility model provides a normal work required voltage through feedback circuit feedback light source, and know the working requirement of light source by first controller through feedback circuit's feedback information under the detection mode, and provide the voltage that accords with light source working requirement for the light source under normal operating mode, make a power supply drive equipment can match the light source load of multiple different specifications automatically, and need not the installer setting, also need not to increase control interface wiring quantity or change the simple mode of wiring of tradition, power supply drive equipment's matching process has not only been simplified, also greatly increased power supply drive equipment applied flexibility and adaptability.
The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the present invention is given.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 shows a schematic structural diagram of a power supply driving apparatus according to an embodiment of the present invention;
fig. 2 shows a schematic circuit diagram of a power supply driving apparatus according to another embodiment of the present invention;
fig. 3 is a schematic diagram of a first detection resistor connected in parallel with a switch tube according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a structure of serially connecting a second detection resistor to the switch tube shown in fig. 3 according to an embodiment of the present invention;
fig. 5 is a schematic flow chart illustrating a power supply driving method for automatically matching with a multi-specification light source load according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In order to solve the technical problem, an embodiment of the utility model provides a with the automatic power supply drive equipment who matches of many specifications light source load. Fig. 1 shows a schematic structural diagram of a power supply driving apparatus according to an embodiment of the present invention. Referring to fig. 1, the power supply driving apparatus according to the embodiment of the present invention includes a digital power supply driver 11 and a feedback circuit 12 having an input terminal 21 and a feedback terminal 22, wherein the digital power supply driver 11 includes a first controller 111, a driving circuit 112 having an input terminal 23 and an output terminal 24, and a first detection resistor 113.
The first controller 111 has a PWM terminal connected to the input terminal 23 of the driving circuit 112, an output terminal 24 of the driving circuit 112 connected to the input terminal 21 of the feedback circuit 12 and the anode of the light source to be driven (not shown in fig. 1), and an ADC terminal connected to the feedback terminal and the first detection resistor 113, respectively.
The power supply driving apparatus includes a detection mode in which the first controller 111 supplies a first voltage to the feedback circuit 12 via the driving circuit 112, and a normal operation mode in which the feedback circuit 12 supplies a feedback signal to the first controller 111 via the first detection resistor 113. After the acquired feedback signal conforms to the predefined format, the first controller 111 supplies power to the driving device to enter a normal operating mode. In this embodiment, the first controller 111 detects the voltage and/or current signal on the first detection resistor 113 through the ADC terminal to obtain the feedback signal.
In the normal operation mode, the first controller 111 provides a predetermined voltage to the feedback circuit 12 through the driving circuit 112, and at this time, the feedback circuit 12 does not operate and the light source to be driven emits light.
In this implementation, the preset voltage is determined according to a feedback signal of a predefined format. The feedback signal in the predefined format carries parameter information such as current, voltage, and power that conforms to the operation of the light source, and the first controller 111 may analyze and restore the corresponding parameter information such as current, voltage, and power from the feedback signal, thereby determining the preset voltage.
The embodiment of the utility model provides an in, power supply drive device is under the detection mode, and first controller provides first voltage to feedback circuit through drive circuit, makes feedback circuit work and the light source is not lighted. The feedback circuit feeds back information in a predefined format generated according to the specification parameters of the light source to the first controller so as to feed back the voltage required by the normal operation of the light source to the first controller. After the first controller detects the information of the predefined format in the detection mode, the preset voltage meeting the working requirement of the light source is determined, the power supply driving equipment enters a normal working mode, and the first controller raises the output voltage of the driving circuit to the preset voltage meeting the working requirement of the light source in the normal working mode, so that automatic matching with the light source load is realized. Namely the embodiment of the utility model provides a normally work required voltage through feedback circuit feedback light source, and know the working requirement of light source by first controller through feedback circuit's feedback information under the detection mode, and provide the voltage that accords with light source working requirement for the light source under normal operating mode, make a power supply drive equipment can match the light source load of multiple different specifications automatically, and need not the installer setting, also need not to increase control interface wiring quantity or change the simple mode of wiring of tradition, power supply drive equipment's matching process has not only been simplified, also greatly increased power supply drive equipment applied flexibility and adaptability.
In the embodiment of the present invention, before the first controller 111 provides the first voltage to the feedback circuit 12 through the driving circuit 112, a lower voltage is provided to the feedback circuit 12, and if the voltage cannot reach the operating voltage of the feedback circuit 12, the ADC end cannot acquire the feedback signal. After the voltage provided by the feedback circuit 12 by the first controller 111 continues to increase to the first voltage, the feedback circuit 12 operates, the feedback circuit 12 provides a feedback signal to the first controller 111, and the first controller 111 detects the feedback signal.
In this embodiment, a predefined format is predefined in the first controller 111 and the feedback circuit 12 as a signal transmission protocol to facilitate the first controller 111 to recognize the detected signal. In addition, the first controller 111 detects that the voltage and/or current signals on the first detection resistor 113 are analog signals, and therefore, the detected analog signals are subjected to digital-to-analog conversion to obtain digital signals, and the specification parameters of the light source, such as parameter information of the current, voltage, power and the like of the light source, are restored according to the digital signals.
In an embodiment of the present invention, the first detecting resistor 113 is further connected to the light source cathode, the other end is further connected to the ground, and the Vss pin of the first controller 111 is also connected to the ground, when the first controller 111 is in the normal operation mode, the first detecting resistor 113 can further provide the current and/or voltage signal of the light source in the light emitting state to the first controller 111, so as to detect the operation state of the light source by the first controller 111. The utility model discloses an embodiment, can also connect the pilot lamp on first controller 111, perhaps with first controller 111 and external communication equipment's communication interface connection, when first controller 111 does not detect the information that accords with predefined format under the detection mode, or when the information that detects surpassed digital power source drive 11's ability scope, then do not get into normal operating mode, first controller 111 can be through lighting the pilot lamp, perhaps send modes such as suggestion information to external communication equipment through communication interface and remind the user.
In this embodiment, if the first controller 111 successfully enters the normal operation mode and the first detection resistor 113 can detect the operating state of the light source, when the light source is abnormal, if the problem of reaching the maximum voltage limit occurs and the light source cannot operate at the rated current, voltage, power, or the like, the indication can be provided by an indicator light or a communication device with a communication interface.
Referring to fig. 2, in an embodiment of the present invention, the first controller 111 (shown in fig. 1) may adopt a microprocessor U1, and the light source adopts an LED light source, and of course, the LED light source may adopt a chip On board cob (chip On board), and may also adopt a filament lamp, etc., and the embodiment of the present invention does not specifically limit the types of the first controller 111 and the light source. Furthermore, the embodiment of the present invention provides an arbitrary drive circuit that can be among the prior art, the embodiment of the present invention does not specifically limit yet.
In the embodiment of the present invention, the feedback circuit 12 includes a constant voltage power supply circuit 121, a high voltage shutdown circuit 122, and a second controller U2.
The constant voltage supply circuit 121 has an input terminal connected to the output terminal 24 of the driving circuit (shown in fig. 1) as an input terminal of the feedback circuit 12, and an output terminal connected to the second controller U2. The constant voltage power supply circuit 121 may supply a constant voltage to the second controller U2 when the received output voltage reaches the first voltage output by the driving circuit, and stop supplying power to the second controller U2 after receiving a preset voltage output by the driving circuit. The constant voltage power supply circuit 121 in this embodiment is mainly responsible for supplying power to other and peripheral circuits of the following second controller U2.
The high voltage shutdown circuit 122 has an input terminal connected to the output terminal 24 of the driving circuit and a control terminal connected to the constant voltage power supply circuit 121. The high voltage shutdown circuit 122 starts to operate when receiving the preset voltage output by the driving circuit, and controls the constant voltage power supply circuit 121 to disconnect the driving circuit, so that the power consumption of the feedback circuit 12 approaches zero when the light source emits light.
The second controller U2 has a power supply terminal VDD connected to the output terminal of the constant voltage power supply circuit 121 and an output terminal P1, the output terminal P1 serving as the feedback terminal of the feedback circuit 12 is connected to the ADC terminal of the microprocessor U1. After receiving the power supplied by the constant voltage power supply circuit 121, the second controller U2 generates a high-low level signal with a predefined format according to the preset specification parameters of the light source and feeds the signal back to the ADC of the microprocessor U1. That is, the output terminal P1 of the second controller U2 outputs a digital switch feedback signal. In this embodiment, the second controller U2 may also be a microprocessor mcu (microcontroller unit), such as a microprocessor with low power consumption, for example, a microprocessor with an operating current less than 1 MA.
With continued reference to fig. 1 and 2, in an embodiment of the present invention, the constant voltage power supply circuit 121 may specifically include a resistor R2, a voltage regulator tube Z1, a resistor R5, and a transistor Q3. One end of the resistor R2 serving as the input end of the constant-voltage power supply circuit 121 is connected with the output end 24 of the driving circuit and one end of the resistor R5, the other end of the resistor R2 is connected with the cathode of the voltage regulator tube Z1, and the anode of the voltage regulator tube Z1 is connected with the cathode of the light source. The other end of the resistor R5 is connected with the collector of a triode Q3, the emitter of the triode Q3 is used as the output end of the constant voltage power supply circuit 121 and is connected with the power supply end of a second controller U2, and the base is connected with the connection point of the resistor R2 and the voltage regulator tube Z1. Wherein, triode Q3 also can replace and become the MOS pipe, and the embodiment of the utility model provides a do not do specific restriction to this.
In this embodiment, after the driving circuit outputs the first voltage, the first voltage reaches the conducting voltage of the transistor Q3, so as to control the transistor Q3 to conduct, and the regulator tube Z1 is used to provide a stable voltage to the second controller U2. The output voltage of the constant voltage power supply circuit 121 in this embodiment is mainly determined by the zener diode Z1. The voltage withstanding value of the triode Q3 is not less than the maximum output voltage of the driving circuit or the working voltage value of the light source. The embodiment of the utility model provides an in appointed voltage can control triode Q3 and switch on, and then makes second controller U2 normally work, nevertheless can't reach the operating voltage of light source, and the light source keeps closing.
With continued reference to fig. 1 and 2, in an embodiment of the present invention, the high-voltage turn-off circuit 122 mainly includes a voltage regulator tube Z2, a transistor Q2, a resistor R3 and a resistor R4 sequentially connected in series with the voltage regulator tube Z2. The cathode of the voltage regulator tube Z2 is used as the input end of the high-voltage turn-off circuit 122 and is connected with the output end 24 of the driving circuit. The base of the triode Q2 is connected with the connection point of the resistor R3 and the resistor R4, the collector is used as the control end of the high-voltage turn-off circuit 122 and is connected with the cathode of the voltage-regulator tube Z1, and the emitter is connected with the cathode of the light source. The end of the resistor R4 not connected with the resistor R3 is connected with the cathode of the light source. Wherein, triode Q2 also can replace and become the MOS pipe, and the embodiment of the utility model provides a do not do specific restriction to this.
In this embodiment, the first voltage of the output of the driving circuit cannot reach the conduction threshold of the transistor Q2, so the transistor Q2 is kept off under the first voltage, and when the voltage of the output of the driving circuit rises to the preset voltage, the preset voltage can reach the conduction threshold of the transistor Q2, thereby controlling the conduction of the transistor Q2. After the triode Q2 is turned on, the base voltage of the triode Q3 is pulled down to 0, so that the triode Q3 can be controlled to be turned off, and the constant voltage power supply circuit 121 is controlled not to supply power to the second controller U2 any more, so that the power consumption of the feedback circuit 12 is close to zero when the light source emits light. The conduction threshold of the transistor Q2 of this embodiment is significantly less than the voltage required to start the light source on.
With continued reference to fig. 2, in an embodiment of the present invention, the power supply driving apparatus further includes a current increasing circuit 123, the current increasing circuit 123 has an input terminal and an output terminal, the input terminal is connected to the output terminal P1 of the second controller U2, and the output terminal is connected to the ADC terminal of the microprocessor U1 and the resistor Ri. The current increase circuit 123 may increase the high level of current output by the second controller U2 when receiving the high level.
In an embodiment of the present invention, the current increasing circuit 123 may specifically include a resistor R6, a resistor R1, and a transistor Q1, wherein the base of the transistor Q1 is connected to the resistor R6, the collector is connected to the resistor R1, and the emitter is connected to the resistor Ri as the output of the current increasing circuit 123. The other end of the resistor R6 is connected to the output end of the second controller U2 as the input end of the current increasing circuit 123, and the other end of the resistor R1 is connected to the output end of the constant voltage supply circuit 121. Wherein, triode Q1 also can replace and become the MOS pipe, and the embodiment of the utility model provides a do not do specific restriction to this.
After the second controller U2 is powered on, it may repeatedly generate corresponding high and low level signals according to the preset specification parameters of the light source, and feed back to the microprocessor U1 by controlling the on and off of the transistor Q1 according to a predetermined format. When the output terminal P1 of the second controller U2 outputs a high level, the transistor Q1 is turned on, and a current flows through the resistor R1, thereby controlling the current on the resistor Ri to increase. When the output terminal P1 of the second controller U2 outputs a low level, the transistor Q1 is turned off, no current flows through the resistor R1, and the current in the resistor Ri decreases.
Continuing to refer to fig. 2, in an embodiment of the present invention, the feedback circuit further includes a diode D3, the positive electrode of the diode D3 is connected to the output end of the driving circuit, and the negative electrode is connected to the cathode of the voltage regulator tube Z2, so as to effectively prevent the driving circuit from being reversely connected to the negative electrode of the light source, and if the driving circuit is reversely connected, the feedback circuit will not work.
In another embodiment of the present invention, the feedback circuit further includes a capacitor C2, one end of which is connected to the power supply terminal VDD of the second controller, and the other end of which is connected to the negative electrode of the light source. The capacitor C2 may enable the second controller to obtain a more stable voltage.
In another embodiment of the present invention, the feedback circuit further includes a diode D4 and a resistor R7 connected in series, and is disposed between the power supply terminal VDD of the second controller and the output terminal of the constant voltage power supply circuit. The anode of diode D4 is connected to the emitter of transistor Q3 for preventing reverse flow of current from the second controller. The other end of the resistor R7, which is not connected with the diode D4, is connected with the power supply end VDD of the second controller, so that when the transistor Q1 performs switching action or the output voltage fluctuates, the charging of the capacitor C2 is reduced, and the current spike and fluctuation amplitude caused in the process of supplying power to the second controller are avoided. Therefore, when the feedback circuit works, the voltage change of the first detection resistor can accurately reflect the high-low level change of the output end P1 of the second controller.
Referring to fig. 2 and 3, in an embodiment of the present invention, in order to avoid the normal operation after the light source is turned on due to the loss of the resistor Ri or the resistance of the resistor Ri being too large, the switch tube Qi may be connected in parallel to the resistor Ri. The switch tube Qi has a first terminal, a second terminal, and a control terminal (ONOFF) connected in parallel to the resistor Ri via the first terminal and the second terminal, the control terminal being configured to receive a control signal from the microprocessor U1 or an external voltage control circuit. The switch tube Qi can control the switch tube Qi to conduct by using the control signal to short circuit the resistor Ri after the output voltage of the driving circuit is increased to a preset voltage.
Referring to fig. 2 and 4, if the above embodiment is adopted to connect the switch tube Qi in parallel on the resistor Ri, then the working state of the light source cannot be effectively detected after the microprocessor U1 enters the normal working mode, so that, in order to realize the detection of the working state of the light source and ensure the normal working after the light source is turned on, the embodiment of the present invention further connects the second detection resistor Ri2 in series on the switch tube Qi, and the resistance of the second detection resistor Ri2 is smaller than the resistance of the resistor Ri.
After the driving circuit outputs the preset voltage, the control signal can be used to control the switching tube Qi to be turned on, short the resistor Ri, and provide the current and/or voltage signal of the light source in the light-emitting state to the microprocessor U1 through the second detection resistor Ri2, so that the microprocessor U1 can detect the working state of the light source.
In the embodiment of the present invention, the switch tube Qi may be an ultra-low resistance MOS tube or a triode. The switching tube Qi shown in fig. 3 and 4 uses MOS tubes, and the drain and source of the MOS tube are respectively used as the first terminal and the second terminal, and the gate is used as the control terminal.
Based on same utility model think, the embodiment of the utility model provides a still provide a lamp, lamp include above arbitrary embodiment with the automatic power supply drive equipment who matches of many specifications light source load, the light source load of being connected with power supply drive equipment.
Based on same utility model conceive, the embodiment of the utility model provides a still provide a power supply drive method with many specifications light source load automatic matching, this method is applied to the power supply drive who contains digital power drive and feedback circuit, and digital power drive includes first controller, the drive circuit and the first detection resistance of being connected with first controller. Fig. 5 is a schematic flow chart illustrating a power supply driving method for automatically matching with a multi-specification light source load according to an embodiment of the present invention. Referring to fig. 5, the method includes at least the following steps S502 to S510.
Step S502, the power supply drive enters a detection mode after being powered on, and in the detection mode, the first controller controls the drive circuit to provide a first voltage to the feedback circuit by adopting the PWM end, and detects a voltage and/or current signal on the first detection resistor.
In step S504, the feedback circuit receives the first voltage output by the driving circuit, generates a high-low level signal in a predefined format according to a preset specification parameter of the light source, and feeds the high-low level signal as a feedback signal to the first controller through the first detection resistor.
Step S506, the first controller obtains a feedback signal by detecting a voltage and/or current signal on the first detection resistor, determines a corresponding preset voltage according to the feedback signal if the obtained feedback signal conforms to a predefined format, and supplies power to the drive circuit to enter a normal operating mode.
In step S508, in the normal operation mode, the first controller controls the output voltage of the driving circuit to increase to a preset voltage, and the light source emits light at the preset voltage.
In step S510, the feedback circuit stops working after receiving the preset voltage output by the driving circuit.
Referring to step S504 above, in an embodiment of the present invention, the feedback circuit mainly includes the second controller and the constant voltage power supply circuit connected thereto, and when step S504 is executed, the constant voltage power supply circuit may be adopted to receive the first voltage output by the driving circuit and provide a constant voltage to the second controller. After receiving the power supply of the constant voltage power supply circuit, the second controller generates a high-low level signal in a corresponding predefined format according to the preset specification parameters of the light source and feeds the high-low level signal back to the first controller through the first detection resistor.
Referring to above steps S508-S510, in an embodiment of the present invention, the feedback circuit further includes a high voltage turn-off circuit, and when step S508 is executed, the high voltage turn-off circuit is adopted when receiving the preset voltage output by the driving circuit, the constant voltage power supply circuit is disconnected from the driving circuit, so that the constant voltage power supply circuit stops supplying power to the second controller, and then the feedback circuit stops working, and stops feeding back the high-low level signal to the first controller.
The utility model discloses an in the embodiment, the power supply drive still includes the electric current increase circuit who is connected respectively with second controller and first detection resistance, when the second controller output high level, can utilize the electric current of electric current increase circuit increase this high level to export to first controller.
The utility model discloses an in the embodiment, first detection resistance can also be connected with the light source, after first controller got into at normal operating mode, can also be through detecting voltage and/or the current signal on the first detection resistance, the operating condition of detection light source.
The utility model discloses an in the embodiment, the power supply drive can still include the switch tube parallelly connected with first detection resistance, and the purpose reduces the loss that leads to on the first detection resistance after the light source normally lights or because the too big influence light source of first detection resistance value lights back normal work, the switch tube of the preferred adoption superlow resistance of switch tube. The first controller directly sends a control signal to the switching tube or informs an external voltage control circuit to send the control signal to the switching tube in a normal working mode, and the switching tube is controlled to be conducted. The first detection resistor is short-circuited after the switching tube is conducted.
In this embodiment, the power supply driver further includes a second detection resistor connected in series with the switching tube, and a resistance of the second detection resistor is smaller than a resistance of the first detection resistor, when the switching tube is turned on and the first detection resistor is short-circuited, the second detection resistor may be connected to the first controller, and the first controller detects a working state of the light source by detecting a voltage and/or current signal on the second detection resistor in the normal working mode.
According to any one of the above preferred embodiments or a combination of a plurality of the above preferred embodiments, the embodiment of the present invention can achieve the following advantageous effects:
the embodiment of the utility model provides an in, the power supply drive includes detection mode and normal operating mode, and under the detection mode, first controller provides first voltage to the feedback circuit through drive circuit, makes the feedback circuit work and the light source does not light. The feedback circuit feeds back information in a predefined format generated according to the specification parameters of the light source to the first controller so as to feed back the voltage required by the normal operation of the light source to the first controller. After the first controller detects the information of the predefined format in the detection mode, the preset voltage meeting the working requirement of the light source is determined, the power supply drive enters a normal working mode, and the first controller raises the output voltage of the drive circuit to the preset voltage meeting the working requirement of the light source in the normal working mode, so that the automatic matching with the light source load is realized. Namely the embodiment of the utility model provides a normal work required voltage through feedback circuit feedback light source, and know the working requirement of light source by first controller through feedback circuit's feedback information under the detection mode, and provide the voltage that accords with light source working requirement for the light source under normal operating mode, make the light source load that a power supply drive can multiple different specifications of automatic matching, and need not the installer setting, also need not to increase control interface wiring quantity or change the simple mode of wiring of tradition, power supply drive's matching process has not only been simplified, also greatly increased the flexibility and the adaptability that power supply drive used.
It is clear to those skilled in the art that the specific working process of the above-described method may refer to the corresponding process in the foregoing system, apparatus and unit embodiments, and for the sake of brevity, further description is omitted here.
In addition, the functional units in the embodiments of the present invention may be physically independent from each other, two or more functional units may be integrated together, or all the functional units may be integrated in one processing unit. The integrated functional units may be implemented in the form of hardware, or in the form of software or firmware.
Those of ordinary skill in the art will understand that: the integrated functional units, if implemented in software and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes a plurality of instructions, so that a computing device (e.g., a personal computer, a server, or a network device) executes all or part of the steps of the method according to the embodiments of the present invention when executing the instructions. And the aforementioned storage medium includes: u disk, removable hard disk, Read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disk, and other various media capable of storing program code.
Alternatively, all or part of the steps of implementing the foregoing method embodiments may be implemented by hardware (e.g., a computing device such as a personal computer, a server, or a network device) associated with program instructions, which may be stored in a computer-readable storage medium, and when the program instructions are executed by a processor of the computing device, the computing device executes all or part of the steps of the method according to the embodiments of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments can be modified or some or all of the technical features can be equivalently replaced within the spirit and principles of the present invention; such modifications and substitutions do not depart from the scope of the present invention.
Claims (11)
1. The power supply driving equipment is characterized by comprising a digital power supply drive and a feedback circuit with an input end and a feedback end, wherein the digital power supply drive comprises a first controller, a driving circuit with an input end and an output end and a first detection resistor, the first controller is provided with a PWM end and an ADC end, the PWM end is connected with the input end of the driving circuit, the output end of the driving circuit is connected with the input end of the feedback circuit and the anode of a light source to be driven, and the ADC end is connected with the feedback end of the feedback circuit and the first detection resistor;
the power supply driving device comprises a detection mode and a normal working mode, wherein in the detection mode, the first controller provides a first voltage to the feedback circuit through the driving circuit; the feedback circuit provides a feedback signal to the first controller through the first detection resistor; after the acquired feedback signal conforms to a predefined format, the first controller enables the power supply driving equipment to enter a normal working mode;
in the normal working mode, the first controller provides preset voltage for the feedback circuit through the driving circuit, the feedback circuit does not work, and the light source to be driven emits light; wherein the preset voltage is determined according to the feedback signal of the predefined format.
2. The power supply driving apparatus according to claim 1, wherein the feedback circuit includes: a constant voltage power supply circuit, a high voltage shutdown circuit, and a second controller, wherein,
the constant voltage power supply circuit is provided with an input end and an output end, the input end of the constant voltage power supply circuit is used as the input end of the feedback circuit and is connected with the output end of the driving circuit, the output end of the constant voltage power supply circuit is connected with the second controller, and the constant voltage power supply circuit is configured to provide constant voltage for the second controller when receiving the first voltage output by the driving circuit; and stopping supplying power to the second controller after receiving a preset voltage output by the driving circuit;
the high-voltage turn-off circuit is provided with an input end and a control end, the input end is connected with the output end of the driving circuit, the control end is connected with the constant-voltage power supply circuit, and the high-voltage turn-off circuit is configured to turn off the connection between the constant-voltage power supply circuit and the driving circuit when receiving a preset voltage output by the driving circuit;
the second controller is provided with a power supply end and an output end, the power supply end is connected with the output end of the constant voltage power supply circuit, the output end of the second controller is used as a feedback end of the feedback circuit to be connected with the ADC end, and the second controller is configured to generate corresponding feedback signals of high and low levels in a predefined format according to preset specification parameters of the light source and feed the feedback signals back to the ADC end after receiving the power supply of the constant voltage power supply circuit.
3. The power supply driving device according to claim 2, wherein the constant voltage power supply circuit includes: a resistor R2, a voltage regulator tube Z1, a resistor R5 and a triode Q3,
one end of the resistor R2 is used as the input end of a constant voltage power supply circuit and is connected with the output end of the driving circuit and one end of the resistor R5, the other end of the resistor R2 is connected with the cathode of the voltage-stabilizing tube Z1, and the anode of the voltage-stabilizing tube Z1 is connected with the cathode of the light source;
the other end of the resistor R5 is connected with the collector of the triode Q3, the emitter of the triode Q3 is used as the output end of the constant voltage power supply circuit and is connected with the power supply end of the second controller, and the base is connected with the connection point of the resistor R2 and the voltage regulator tube Z1;
after the driving circuit outputs a first voltage, the first voltage reaches the conducting voltage of the triode Q3, the triode Q3 is conducted, and the voltage regulator tube Z1 is used for providing a stable voltage for the second controller.
4. The power supply driving apparatus according to claim 3, wherein the high voltage shutdown circuit includes: a triode Q2, a voltage regulator tube Z2, a resistor R3 and a resistor R4 which are sequentially connected in series between the output end of the drive circuit and the cathode of the light source,
the cathode of the voltage-stabilizing tube Z2 is used as the input end of the high-voltage turn-off circuit and is connected with the output end of the driving circuit;
the base electrode of the triode Q2 is connected with the connection point of the resistor R3 and the resistor R4, the collector electrode is used as the control end of the high-voltage turn-off circuit and is connected with the cathode of the voltage regulator tube Z1, and the emitter electrode is connected with the cathode of the light source; one end of the resistor R4, which is not connected with the resistor R3, is connected with the cathode of the light source;
after the driving circuit outputs the preset voltage, the triode Q2 is switched on and controls the triode Q3 to be switched off, and then the constant-voltage power supply circuit is controlled not to supply power to the second controller any more.
5. The power supply driving apparatus according to claim 2, further comprising:
and the current increasing circuit is provided with an input end and an output end, the input end of the current increasing circuit is connected with the output end of the second controller, the output end of the current increasing circuit is connected with the ADC end and the first detection resistor, and the current increasing circuit is configured to increase the current of a feedback signal when receiving a high-level feedback signal output by the second controller.
6. The power supply driving apparatus according to claim 5, wherein the current increase circuit comprises: a resistor R6, a resistor R1, and a transistor Q1, wherein,
the base electrode of the triode Q1 is connected with one end of the resistor R6, the collector electrode of the triode Q1 is connected with one end of the resistor R1, and the emitter electrode of the triode Q1 is used as the output end of the current increasing circuit and is connected with the first detection resistor;
the other end of the resistor R6 is used as the input end of the current increasing circuit and is connected with the output end of the second controller, and the other end of the resistor R1 is connected with the output end of the constant-voltage power supply circuit.
7. The power supply driving apparatus according to claim 1,
the first detection resistor is further connected with the cathode of the light source and is further configured to provide a current and/or voltage signal of the light source in a light-emitting state to the first controller, so that the first controller can detect the working state of the light source.
8. The power supply driving apparatus according to claim 7, wherein the digital power supply driving further comprises:
and the switching tube is provided with a first end, a second end and a control end, the first end and the second end are connected with the first detection resistor in parallel, the control end receives a control signal of the first controller or the external voltage control circuit, and the control end is configured to control the switching tube to be conducted by utilizing the control signal after the driving circuit outputs a preset voltage so as to short-circuit the first detection resistor.
9. The power supply driving apparatus according to claim 8, wherein the digital power supply driving further comprises:
the second detection resistor is connected with the switch tube in series and is configured to control the switch tube to be conducted by using the control signal after the driving circuit outputs a preset voltage, so that a current and/or voltage signal of the light source in a light-emitting state is provided to the first controller, and the first controller can detect the working state of the light source;
the resistance value of the second detection resistor is smaller than that of the first detection resistor.
10. The power supply driving device according to claim 8 or 9, wherein the switching tube comprises a triode or a MOS tube.
11. A light fixture, comprising:
the power supply driving device of any one of claims 1-10 for automatically matching with a multi-specification light source load;
and the light source load is connected with the power supply driving device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921045593.8U CN210609798U (en) | 2019-07-05 | 2019-07-05 | Power supply driving equipment automatically matched with multi-specification light source load and lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921045593.8U CN210609798U (en) | 2019-07-05 | 2019-07-05 | Power supply driving equipment automatically matched with multi-specification light source load and lamp |
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| CN210609798U true CN210609798U (en) | 2020-05-22 |
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| CN201921045593.8U Withdrawn - After Issue CN210609798U (en) | 2019-07-05 | 2019-07-05 | Power supply driving equipment automatically matched with multi-specification light source load and lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110366291A (en) * | 2019-07-05 | 2019-10-22 | 欧普照明股份有限公司 | With more specification light source load Auto-matchings for electric drive, lamps and lanterns and driving method |
-
2019
- 2019-07-05 CN CN201921045593.8U patent/CN210609798U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110366291A (en) * | 2019-07-05 | 2019-10-22 | 欧普照明股份有限公司 | With more specification light source load Auto-matchings for electric drive, lamps and lanterns and driving method |
| CN110366291B (en) * | 2019-07-05 | 2024-04-09 | 欧普照明股份有限公司 | Power supply driving and lamp automatically matched with loads of light sources with multiple specifications and driving method |
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