CN210609797U - Power supply driving equipment capable of automatically matching multi-specification light source loads and lamp - Google Patents
Power supply driving equipment capable of automatically matching multi-specification light source loads and lamp Download PDFInfo
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- CN210609797U CN210609797U CN201921044524.5U CN201921044524U CN210609797U CN 210609797 U CN210609797 U CN 210609797U CN 201921044524 U CN201921044524 U CN 201921044524U CN 210609797 U CN210609797 U CN 210609797U
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Abstract
The utility model provides an automatic match power supply drive equipment and lamps and lanterns of many specifications light source loads, wherein, power supply drive equipment includes power drive and supplementary identification circuit, and power drive includes controller and the drive circuit who is connected rather than, first detection resistance, and the controller provides driving voltage to supplementary identification circuit through drive circuit. And the auxiliary identification circuit comprises an identification resistor connected between the driving circuit and the first detection resistor in series. The power supply driving device comprises a current detection mode, a voltage detection mode and a normal working mode, the power supply driving device detects preset load current and load maximum driving voltage required by the light source load in the current detection mode and the voltage detection mode, and therefore the controller provides voltage and current capable of meeting the working requirements of the light source to the load light source through the driving circuit in the normal working mode, and one power supply driving device can be automatically matched with the light source loads of various specifications.
Description
Technical Field
The utility model relates to the field of lighting technology, especially, relate to an automatic match power supply drive equipment and lamps and lanterns of many specifications light source loads.
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 luminaire for automatically matching multi-specification light source loads, which overcome the above problems or at least partially solve the above problems.
The foundation the utility model discloses an aspect provides an automatic match many specifications light source load's power supply drive equipment, include: the power supply drive comprises a controller, a drive circuit connected with the controller and a first detection resistor, wherein the controller provides drive voltage for the auxiliary identification circuit through the drive circuit;
the auxiliary identification circuit comprises an identification resistor and a switch element which are connected in series between the drive circuit and the first detection resistor, wherein the resistance value of the identification resistor is greater than that of the first detection resistor;
the power supply driving device comprises two modes, in the current detection mode, the controller provides a plurality of voltage values in a first voltage range to the auxiliary identification circuit through the driving circuit, the voltage values all reach the conducting voltage of the switching element, the switching element is conducted, and current flows through the identification resistor; after determining the resistance value of the identification resistor according to the voltage values, the voltage and the resistance value of the first detection resistor, the controller determines a preset load current which corresponds to the resistance value of the identification resistor, and enters a normal working mode;
in the normal working mode, the controller provides a preset load current to the load through the driving circuit, the switching element is turned off, and the power consumption of the auxiliary identification circuit is zero; the light source load emits light.
Optionally, the power supply driving apparatus further comprises a voltage detection mode,
in the voltage detection mode, the controller provides a second voltage to the auxiliary identification circuit through the driving circuit, the switching element is turned off, and the identification resistor does not carry current; the controller determines the maximum driving voltage of the load corresponding to the second voltage and enters a normal working mode;
in the normal working mode, the controller provides a voltage value which does not exceed the maximum driving voltage of the load to the load through a driving circuit;
and the voltage division of the first detection resistor is 0 under the second voltage.
Optionally, the power supply driving apparatus further comprises a load detection mode,
in the load detection mode, the controller provides a specified voltage to the auxiliary identification circuit through a driving circuit; the switching element is turned off, and the auxiliary identification circuit does not work; after the controller detects that the partial voltage of the first detection resistor is 0, determining that the light source load meets the specified specification and entering the current detection mode;
wherein the specified voltage is less than a minimum voltage value in the first voltage range.
Optionally, the driving circuit has an input terminal and an output terminal, the controller has a PWM terminal and an ADC terminal, wherein the PWM terminal is connected to the input terminal of the driving circuit, the output terminal of the driving circuit is connected to the positive electrode of the load, and the first detection resistor is connected between the ADC terminal and the ground terminal;
the auxiliary identification circuit is provided with an input end and an identification end, the input end of the auxiliary identification circuit is connected with the output end of the driving circuit, the identification end is connected with the ADC end, and the identification resistor is connected between the input end and the identification end of the auxiliary identification circuit.
Optionally, the switching tube includes a MOS tube Q1, a source of the MOS tube Q1 is connected to the first detection resistor, a drain of the MOS tube Q1 is connected to the identification resistor, and a VGS conduction threshold of the switching element is greater than a DS-pole reverse body diode VF value;
the auxiliary identification circuit further comprises a high-voltage turn-off circuit, the high-voltage turn-off circuit is provided with an input end and a control end, the input end is connected with the input end of the auxiliary identification circuit, the control end is connected with the grid electrode of the MOS tube Q1, the MOS tube Q1 is turned off when the second voltage output by the driving circuit is received, the identification resistor is not electrified, and the partial voltage of the first detection resistor is 0.
Optionally, the high voltage shutdown circuit comprises: a triode Q2, a blocking voltage regulator tube Z2, a resistor R3 and a resistor R4 which are sequentially connected in series between the input end and the identification end of the auxiliary identification circuit,
the cathode of the blocking voltage regulator tube Z2 is used as the input end of the high-voltage turn-off circuit and is connected with the input end of the auxiliary identification circuit;
the base electrode of the triode Q2 is connected with the connection point of the resistor R3 and the resistor R4, and the collector electrode of the triode Q2 is used as the control end of the high-voltage turn-off circuit and is connected with the grid electrode of the MOS tube Q1; one end of the resistor R4, which is not connected with the resistor R3, is connected with the negative pole of the light source load;
after the driving circuit outputs the second voltage, the triode Q2 is turned on, and the MOS transistor Q1 is controlled to be turned off.
Optionally, the auxiliary identification circuit further includes a resistor R2 connected between the gate of the MOS transistor Q1 and the input terminal of the auxiliary identification circuit.
Optionally, the power supply driving apparatus further includes:
and the cathode of the protection voltage regulator tube Z1 is connected with the grid electrode of the MOS tube Q1, the anode of the protection voltage regulator tube Z1 is connected with the source electrode of the MOS tube Q1, and the protection voltage regulator tube Z1 is configured to limit the VGS voltage of the MOS tube Q1 not to exceed the maximum allowable voltage value.
Optionally, the identification resistor is N times as large as the first detection resistor, where N is greater than 50 and less than 100.
Optionally, the first detection resistor is further connected to the negative electrode of the light source load, and configured to provide a current and/or voltage signal of the light source load in a light-emitting state to the controller, so that the controller detects an operating state of the light source load.
Optionally, the 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 controller or the external voltage control circuit, and the switching tube is controlled to be conducted by the control signal to short circuit the first detection resistor in the normal working mode.
Optionally, the 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 in the normal working mode so as to provide a current and/or voltage signal of the light source load in a light-emitting state to the controller, so that the controller can detect the working state of the light source load;
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 for automatically matching multi-specification light source loads according to any embodiment above;
and the light source load is connected with the power supply driving device.
In the embodiment of the utility model, the power supply driving device comprises a current detection mode and a normal operation mode, the controller of the power supply driving device provides gradually rising output voltage to the auxiliary identification circuit through the driving circuit, thereby enabling the power supply driving device to work in a current detection mode and a normal working mode respectively, and by detecting the preset load current required by the light source load in the current detection mode, therefore, in the normal working mode, the controller provides current capable of meeting the working requirement of the light source to the load light source through the driving circuit, so that one power supply driving device can automatically match with a plurality of light source loads with different specifications, the power supply driving device is not required to be set by an installer, the wiring quantity of the control interface is not required to be increased, or the traditional simple wiring mode is not required to be changed, so that the matching process of the power supply driving device is simplified, and the flexibility and the adaptability of the application of the power supply driving device are greatly improved. Furthermore, the circuit structure of the scheme is simple, and the cost of circuit elements of the lamp can be effectively saved.
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 of a power supply driving method 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 an automatic match power supply drive device of many specifications light source loads can be applied to in the illumination lamps and lanterns. Fig. 1 shows a schematic structural diagram of a power supply driving device for automatically matching multi-specification light source loads according to an embodiment of the present invention.
Referring to fig. 1, the power supply driving apparatus includes a power supply driver 11 and an auxiliary identification circuit 12, wherein the power supply driver 11 includes a controller 111, and a driving circuit 112 and a first detection resistor 113 connected thereto, and the controller 111 supplies a driving voltage to the auxiliary identification circuit 12 via the driving circuit 112. The auxiliary identifying circuit 12 includes an identifying resistor (not shown in the figure) and a switching element (not shown in the figure) connected in series between the driving circuit 112 and the first detecting resistor 113.
In this embodiment, the power supply driving includes two modes, namely a current detection mode and a normal operation mode.
In the current detection mode, the controller 111 provides the auxiliary identification circuit 12 with a plurality of voltage values in the first voltage range through the driving circuit, and the plurality of voltage values all reach the turn-on voltage of the switching element, so that the switching element is turned on and a current flows through the identification resistor. After determining the resistance value of the identification resistor according to the voltage values, the voltage and the resistance value of the first detection resistor 113, the controller 111 determines a preset load current having a corresponding relationship with the resistance value of the identification resistor, and enters a normal operating mode. In the normal operation mode, the controller 111 provides the preset load current determined by the current detection mode to the load through the driving circuit, and controls the switching element to be turned off, at this time, the power consumption of the auxiliary identification circuit 12 is zero, and the light source load is turned on to emit light.
In this embodiment, the identification resistor has a resistance value much larger than that of the first detection resistor 113. It is common to identify the resistor as N times the value of the first sensing resistor 113, where N is greater than 50 and less than 100. Of course, the identification resistor resistance and the first detection resistor 113 resistance may not be multiple relationships, and the embodiment of the present invention does not specifically limit this.
In the embodiment of the present invention, the power supply driving device includes a current detection mode and a normal operation mode, the controller 111 of the power supply driving device supplies a gradually rising output voltage to the auxiliary recognition circuit 12 through the driving circuit 112, thereby enabling the power supply driver to respectively work in a current detection mode, a voltage detection mode and a normal working mode, and by detecting the preset load current required by the light source load in the current detection mode, therefore, in the normal operation mode, the controller 111 provides the current capable of meeting the operation requirement of the light source to the load light source through the driving circuit 112, so that one power supply driving device can automatically match with the light source loads with different specifications, the power supply driving device does not need to be set by an installer, the wiring quantity of the control interface does not need to be increased or the traditional simple wiring mode does not need to be changed, the matching process of the power supply driving device is simplified, and the flexibility and the adaptability of the power supply driving application are greatly improved. Furthermore, the circuit structure of the scheme is simple, and the cost of circuit elements of the lamp can be effectively saved.
The embodiment of the utility model provides an in, identification resistance mainly used provides identification information, can set up the identification resistance of different resistances to different specification parameter's light source load, and specification parameter here can be light source load predetermined rated current, power, voltage information etc.. Therefore, each specification parameter of the light source load corresponds to one identification resistor with a resistance value, for example, a 100 ohm identification resistor corresponds to a predetermined current of 150mA for the light source load. The correspondence between the specification parameters of the light source load and the identifying resistance may be stored in the controller in advance. In addition, the resistance value of the identification resistor is far larger than the internal resistance of the wire and the first detection resistor, and the resistance value and the power of the identification resistor can not be damaged due to overheating in each mode.
Referring to fig. 2, the controller 111 (shown in fig. 1) in the embodiment of the present invention may adopt a microprocessor U1, where the microprocessor U1 refers to an MCU (micro controller Unit). The light source load can adopt an LED light source, the LED light source can adopt a Chip On Board (COB), and can also adopt a filament lamp and the like. The switching element may be a MOS transistor Q1 in fig. 2, the source of the MOS transistor Q1 is connected to the first detection resistor 113, and the drain is connected to the identification resistor. The MOS transistor Q1 is a high voltage MOS transistor, and the voltage resistance value of the MOS transistor Q1 is not less than the maximum driving voltage output by the driving circuit or the operating voltage value of the light source load. The internal resistance value of the MOS transistor Q1 is far larger than that of the identifying resistor R1, and the VGS conduction threshold value of the MOS transistor Q1 needs to be significantly larger than the VF value of the DS-pole reverse body diode. The embodiment of the present invention does not specifically limit the types of the microprocessor U1, the light source load, and the switching element. 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.
With continued reference to fig. 2, resistor Ri in fig. 2 is referred to as the first sensing resistor 113, the driving circuit (not shown in fig. 2) has an input terminal and an output terminal, and the microprocessor U1 has a PWM terminal and an ADC terminal, wherein the PWM terminal is connected to the input terminal of the driving circuit, the output terminal of the driving circuit is connected to the positive terminal of the load, the ADC terminal is connected to the connection point of resistor Ri and the identification resistor R1, and resistor Ri is connected between the ADC terminal and the ground terminal. The auxiliary identification circuit 12 has an input terminal connected to the output terminal of the driving circuit and an identification terminal connected to the ADC terminal, and an identification resistor R1 is connected in series between the input terminal and the identification terminal of the auxiliary identification circuit 12. The end of resistor Ri not connected to the ADC terminal is also connected to the Vss pin of microprocessor U1. The source of the MOS transistor Q1 is connected to the identification terminal of the auxiliary identification circuit 12, and the drain of the MOS transistor Q1 is connected to the identification resistor R1.
The utility model discloses an embodiment, power supply drive device can also include the voltage detection mode, and power supply drive device's voltage detection mode is a mode that is located between normal operating mode and the current detection mode to guarantee effectively that the voltage value that does not exceed the biggest driving voltage of load is provided for the light source load.
In the voltage detection mode, the controller 111 provides the second voltage to the auxiliary identification circuit 12 via the driving circuit, at which time the MOS transistor Q1 is turned off and no current flows through the identification resistor R1. After determining the maximum driving voltage of the load having a corresponding relationship with the second voltage, the controller 111 enters a normal operation mode in which the divided voltage of the first detection resistor 113 is 0 at the second voltage.
The controller provides the voltage capable of meeting the working requirement of the light source to the load light source through the driving circuit in the normal working mode by detecting the maximum driving voltage of the load required by the light source load in the voltage detection mode. From this, adopt the utility model discloses power supply drive equipment can enough provide the electric current that satisfies its work demand for the light source load, can provide the magnitude of voltage that is not more than the biggest drive voltage of load for the light source load again, guarantees the effective work of light source load.
The utility model discloses an in an embodiment, power supply drive device can also include the load detection mode, and power supply drive device goes up the power later and enters the load detection mode earlier, and microprocessor U1 provides appointed voltage to supplementary recognition circuit 12 through drive circuit under the load detection mode, and at this moment, appointed voltage can't reach MOS pipe Q1's turn-on voltage, and MOS pipe Q1 is turn-off, and supplementary recognition circuit 12 is out of work. When the microprocessor U1 detects that the divided voltage of the resistor Ri is 0, it may be determined that the light source load meets the specified specification, and thus enter the current detection mode in which the light source load does not emit light. In this embodiment, the specified voltage is smaller than the minimum voltage value in the first voltage range, and is larger than the DS reversed body diode VF value of the MOS transistor Q1 and smaller than the VGS conduction threshold.
The light source load meeting the specified specification may be that the light source load is an LED light source, but not an incandescent lamp or other lamps, because the incandescent lamp emits light in the current detection mode, the subsequent current and voltage detection mode cannot be performed, and the power supply driving device cannot automatically match with incandescent lamps of multiple specifications.
Referring to fig. 2, in the embodiment of the present invention, the auxiliary identification circuit 12 further includes a resistor R2, and the resistor R2 is connected between the gate of the MOS transistor Q1 and the input terminal of the auxiliary identification circuit 12.
In this embodiment, the auxiliary identification circuit 12 further includes a protection regulator tube Z1, the cathode of the protection regulator tube Z1 is connected to the gate of the MOS tube Q1, and the anode is connected to the source of the MOS tube Q1, which may limit the VGS voltage of the MOS tube Q1 not to exceed the maximum allowable voltage value.
In order to more clearly embody the embodiments of the present invention, the working processes of the power supply driving device in each mode are specifically described below by taking fig. 2 as an example.
Load detection mode
After the power supply driving device is powered on, when the specified voltage output by the microprocessor U1 through the driving circuit is greater than the DS reversed body diode VF value of the MOS transistor Q1 and less than the VGS conduction threshold, the MOS transistor Q1 is not conducted. In order to ensure the accuracy of the load detection, the driving circuit provides a plurality of voltage values within a specified voltage range to the auxiliary identification circuit 12 in the load detection mode, and the plurality of voltage values within the specified voltage range are all smaller than the minimum voltage value within the first voltage range.
For example, assuming that the DS reverse body diode VF of the MOS transistor Q1 is 1V (VFQ1 is 1V), and the VGS pass threshold is 4V, the voltage values in the specified voltage range output by the driving circuit may be 2V, 2.5V, 3V, 3.5V, etc., and will be maintained at each voltage value for a certain period of time, so as to prevent the parasitic capacitance, etc., from affecting the circuit accuracy. If the microprocessor U1 detects that the divided voltage of the resistor Ri is 0 at each voltage value output by the driving circuit, it may be determined that the light source load meets the specified specification, and the current detection mode is entered.
In another embodiment, the auxiliary identification circuit 12 may also be supplied with a slowly increasing drive voltage within a specified voltage range by the drive circuit while the microprocessor U1 continuously monitors and measures the voltage across the resistor Ri. For example, the driving voltage output by the driving circuit is slowly increased between 1V and 4V, the microprocessor U1 continuously monitors and measures the voltage on the resistor Ri, and if the continuously measured voltage on the resistor Ri is 0, it can be determined that the light source load meets the specified specification, and the current detection mode is entered.
In addition, the load detection mode can also effectively identify whether the light source load is connected reversely, and if the microprocessor U1 detects that the voltage on the resistor Ri is 0, it proves that the light source load is not connected reversely, so as to enter the current detection mode. If the microprocessor U1 detects that the voltage across the resistor Ri complies with the rule of Ri x (Vadj-VFQ1)/R1 (formula 1), it can be determined that the light source load is reversed and the power driving apparatus will not enter the subsequent mode. Vadj is a driving voltage supplied from the driving circuit to the auxiliary identifying circuit 12.
The embodiment of the utility model provides a can also connect the pilot lamp on microprocessor U1, perhaps with microprocessor U1 and external communication equipment's communication interface connection to in time report the problem when the problem appears under each mode. When the microprocessor U1 detects the voltage on the resistor Ri to know that the voltage on the resistor Ri does not conform to the rule of Ri x (Vadj-VFQ1)/R1 (formula 1), the light source load is connected reversely, and the microprocessor U1 can prompt a user by lighting an indicator lamp or sending related prompt information to external communication equipment through a communication interface.
Current sensing mode
The microprocessor U1 controls the driving circuit to continuously boost the output driving voltage, and when the driving voltage reaches the first voltage range, the driving voltage may be controlled to be maintained at a plurality of voltage values within the first voltage range for a period of time, or the driving circuit may slowly boost the output driving voltage within the first voltage range. The plurality of voltage values in the first voltage range all reach the saturation turn-on voltage of the MOS transistor Q1, so that the MOS transistor Q1 is turned on.
Then, the microprocessor U1 detects the voltage of the resistor Ri at each voltage value (driving voltage), and if the voltage of the resistor Ri calculated for multiple times conforms to the rule of Ri x Vadj/R1 (formula 2), that is, the voltage of the resistor Ri calculated at each voltage value is in the same proportion to the voltage value, it can preliminarily determine that the lighting fixture has the auxiliary identification circuit 12 designed according to the scheme. If the driving circuit slowly increases the driving voltage output by the driving circuit within the first voltage range, the microprocessor U1 continuously monitors and measures the voltage across the resistor Ri, and calculates the resistance of the identifying resistor R1.
Furthermore, the microprocessor U1 reversely deduces the resistance of the identification resistor R1 for each voltage value (driving voltage) according to formula 2, and if the calculated resistance of the identification resistor R1 is the same or at the same resistance level, it can be further determined that the lighting fixture has the auxiliary identification circuit 12 designed by the present scheme. When the calculated resistance value of the identification resistor R1 is in the same resistance value segment, the average value or the middle value of the resistance values in the resistance value segment of the identification resistor R1 may be subsequently taken as the resistance value of the identification resistor R1.
Finally, the microprocessor U1 finds the predetermined load current corresponding to the resistance of the identifying resistor R1 from the pre-stored correspondence, and enters the voltage detection mode.
If the microprocessor U1 is connected with an indicator light or the microprocessor U1 is connected with a communication interface of an external communication device, in the current detection mode, if the voltage of the resistor Ri calculated for multiple times does not conform to the rule of Ri xVadj/R1 (formula 2) by calculation, or the resistance values of the resistor R1 calculated for multiple times are not equal, the same segment of bit is not obtained. Then, the powered driver device does not enter the subsequent mode and the driver circuit does not increase the driving voltage, and the microprocessor U1 may prompt the user by illuminating an indicator light or sending a related prompt message to an external communication device through the communication interface.
Voltage detection mode
The auxiliary identification circuit 12 further includes a high voltage turn-off circuit 122, the high voltage turn-off circuit 122 has an input terminal and a control terminal, the input terminal is connected to the input terminal of the auxiliary identification circuit 12, the control terminal is connected to the gate of the MOS transistor Q1, the high voltage turn-off circuit 122 can turn off the MOS transistor Q1 when receiving the second voltage output by the driving circuit, at this time, the identification resistor R1 does not pass current, and the divided voltage of the resistor Ri is zero or close to zero.
The high-voltage turn-off circuit 122 specifically comprises a triode Q2, and a blocking voltage regulator tube Z2, a resistor R3 and a resistor R4 which are sequentially connected in series between the input end and the identification end of the auxiliary identification circuit 12, wherein the cathode of the blocking voltage regulator tube Z2 is used as the input end of the high-voltage turn-off circuit 122 and is connected with the input end of the auxiliary identification circuit 12. The base of the triode Q2 is connected with the connection point of the resistor R3 and the resistor R4, and the collector of the triode Q2 is connected with the gate of the MOS transistor Q1 as the control end of the high-voltage turn-off circuit 122. The end of the resistor R4 not connected with the resistor R3 is connected with the negative pole of the light source load.
In this embodiment, the resistor R2 and the resistor R3 are both resistors with extremely large resistance values, so that after the light source load is turned on in the normal operation mode, the power loss of the resistor R2 and the resistor R3 is negligible. The blocking regulator tube Z2 is used to make the transistor Q2 require a larger minimum on input voltage V + than the MOS transistor Q1. Moreover, the threshold of the on input voltage of the transistor Q2 needs to be significantly smaller than the voltage required when the light source load starts to be slightly bright.
The microprocessor U1 controls the driving circuit to continuously boost the output driving voltage, when the driving voltage reaches a second voltage, the second voltage reaches the opening threshold of the triode Q2, so that the triode Q2 is controlled to be opened, the MOS transistor Q1 is controlled to be turned off after the triode Q2 is opened, and at the moment, no current passes through the identification resistor R1. Since the second voltage has not yet reached the minimum voltage value required for lighting the light source load, the voltage across the resistor Ri is close to zero.
The second voltage in this embodiment is actually a knee voltage, i.e., the voltage across resistor Ri detected by microprocessor U1 is zero or near zero. The embodiment of the utility model provides a can set up rather than possessing the inflection point voltage of corresponding relation to the biggest driving voltage of different light source loads, and this corresponding relation can save in microprocessor U1 in advance. Therefore, when the microprocessor U1 detects that the voltage of the resistor Ri is zero or close to zero at the second voltage, the maximum driving voltage of the light source load corresponding to the voltage value of the second voltage is found from the correspondence stored in advance.
If the indicator light is connected to the microprocessor U1 or the microprocessor U1 is connected to the communication interface of the external communication device, in the voltage detection mode, if the driving voltage output by the driving circuit has reached the maximum voltage threshold of the driving circuit, but the voltage on the resistor Ri is still not zero or close to zero by the microprocessor U1, the power supply driving device does not enter the subsequent mode any more, and the driving circuit does not raise the driving voltage any more, and the microprocessor U1 may prompt the user by turning on the indicator light or sending related prompt information to the external communication device through the communication interface.
Normal mode of operation
The microprocessor U1 controls the driving circuit to continuously boost the output driving voltage, so that the driving circuit provides the preset load current to the light source load, and the provided driving voltage does not exceed the maximum driving voltage of the load, thereby controlling the light source load to emit light. At this time, no current flows through the MOS transistor Q1 and the identification resistor R1, and the resistor R2 and the resistor R3 are both resistors with extremely large resistance values, so that power loss in the resistor R2 and the resistor R3 is negligible, that is, the power consumption of the auxiliary identification circuit 12 is zero.
In addition, according to the preset load current provided to the light source load, a preset voltage, power, and the like provided to the light source load may also be determined.
If the indicator light is connected to the microprocessor U1 or the microprocessor U1 is connected to the communication interface of the external communication device, in the normal operation mode, if the driving voltage output by the driving circuit has reached the maximum voltage threshold of the driving circuit, but cannot reach the preset current, voltage, power, etc. of the light source load, the microprocessor U1 may prompt the user by turning on the indicator light or sending related prompt information to the external communication device through the communication interface.
Referring to fig. 2 and 3, in an embodiment of the present invention, in order to avoid the normal operation of the light source load after the light source load 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 load 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 load and ensure the normal working after the light source load is lighted, the embodiment of the present invention further connects the second detection resistor Ri2 in series on the switch tube Qi, and the resistance value of the second detection resistor Ri2 is smaller than the resistance value 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 conceive, the embodiment of the utility model provides a lamps and lanterns are still provided, the power supply drive equipment of the many specifications light source load of automatic matching in the arbitrary embodiment of the above and 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 an automatic power supply drive method who matches many specifications light source loads is still provided, is applied to the power drive who contains power drive and supplementary identification circuit, and power drive includes controller, drive circuit and first detection resistance, and supplementary identification circuit includes that switching element and resistance are far more than the identification resistance of the resistance of first detection resistance. Fig. 5 is a schematic flow chart illustrating a power supply driving method for automatically matching a multi-specification light source load according to an embodiment of the present invention. Referring to fig. 5, the method includes at least steps S502 to S506.
Step S502, the power supply drive enters a current detection mode after being powered on, and in the current detection mode, the controller provides a plurality of voltage values in a first voltage range to the auxiliary identification circuit through the drive circuit, wherein the voltage values all reach the breakover voltage of the switch element, so that the switch element is conducted, and the current flows through the identification resistor.
In step S504, if the controller detects that the voltages of the first detection resistors are in the same proportion to the corresponding voltage values under the multiple voltage values, the controller determines the resistance value of the identification resistor according to the multiple voltage values, the voltages and the resistance values of the first detection resistors, determines the preset load current having a corresponding relationship with the resistance value of the identification resistor, and enters a normal operating mode.
In step S506, in the normal operation mode, the controller provides a preset load current to the light source load through the driving circuit, and provides a voltage value not exceeding the maximum driving voltage of the load, so as to control the switching element to turn off and control the light source load to emit light.
The utility model discloses an embodiment, after the power supply drive gets into the current detection mode, and before getting into normal operating mode, guarantee effectively for light source load provides the voltage value that does not exceed the biggest driving voltage of load, can advance the voltage detection mode, under the voltage detection mode, the controller provides the second voltage to supplementary identification circuit through drive circuit, if the partial pressure that detects first detection resistance is 0, confirms the biggest driving voltage of load that has corresponding relation with the second voltage, gets into normal operating mode. In the normal working mode, the controller provides a voltage value which does not exceed the maximum driving voltage of the load to the light source load through the driving circuit, and the light source load is controlled to emit light.
The utility model relates to an embodiment, before the drive of supplying power gets into the current detection mode, in order to ensure that the light source load accords with appointed standard, avoid the light source load to be not conform to appointed standard and make the unable follow-up electric current of execution of power supply drive, the voltage detection mode, and discern effectively whether the light source load connects conversely, after power supply drive is gone up, can get into load detection mode earlier, the controller provides appointed voltage to supplementary recognition circuit through drive circuit, the control switch component is turn-offed, if the partial pressure that the controller detected first detection resistance is 0, confirm that the load accords with appointed standard and gets into the current detection mode. The auxiliary identification circuit does not work after receiving the specified voltage, and the specified voltage is smaller than the minimum voltage value in the first voltage range. The embodiment of the utility model provides an in switching element can adopt the MOS pipe to, assigned voltage is greater than the reverse body diode VF value of DS of MOS pipe and is less than VGS and switches on the threshold value, and, the VGS of MOS pipe switches on the threshold value and is greater than the reverse body diode VF value of DS utmost point.
The utility model discloses an in the embodiment, supplementary identification circuit still includes the high pressure and cuts off the circuit, and under the voltage detection mode, when the controller provided the second voltage to supplementary identification circuit through drive circuit, the high pressure was cut off circuit control identification resistance and is not switched on current for the partial pressure of first detection resistance is 0, and the power supply drive gets into normal operating mode.
The utility model discloses an in the embodiment, first detection resistance still is connected with the light source load, and under normal operating mode, the controller detects the operating condition of light source load through voltage and/or the current signal on detecting first detection resistance.
The utility model discloses an in the embodiment, the power supply drive still includes the switch tube parallelly connected with first detection resistance, and under normal operating mode, the controller is direct to switch tube send control signal or inform external voltage control circuit to switch tube send control signal, and the control switch tube switches on. The first detection resistor is short-circuited after the switching tube is conducted.
The utility model discloses an in the embodiment, the power supply drive still includes the second detection resistance who establishes ties with the switch tube, and the resistance of second detection resistance is less than the resistance of first detection resistance. The first detection resistor of short circuit after the switch tube switches on to be connected the second detection resistor to the controller, under normal operating mode, the controller detects the operating condition of light source load through detecting voltage and/or current signal on the second detection resistor.
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:
in the embodiment of the present invention, the power supply driver includes a current detection mode, a voltage detection mode and a normal operation mode, the controller of the power supply driver provides gradually increasing output voltage to the auxiliary identification circuit through the driving circuit, so that the power supply driver respectively operates in the current detection mode, the voltage detection mode and the normal operation mode, by detecting the preset load current and the maximum load driving voltage required by the light source load in the current detection mode and the voltage detection mode, the controller provides the voltage and the current capable of meeting the light source operation requirement to the load light source through the driving circuit in the normal operation mode, so that one power supply driver can automatically match the light source loads of various specifications without the setting of an installer, without increasing the wiring number of the control interfaces or changing the traditional simple wiring mode, thereby not only simplifying the matching process of the power supply driver, the flexibility and adaptability of the power supply driving application are greatly increased. Furthermore, the circuit structure of the scheme is simple, and the cost of circuit elements of the lamp can be effectively saved.
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 (13)
1. A power supply driving apparatus for automatically matching a multi-specification light source load, comprising: the power supply drive comprises a controller, a drive circuit connected with the controller and a first detection resistor, wherein the controller provides drive voltage for the auxiliary identification circuit through the drive circuit;
the auxiliary identification circuit comprises an identification resistor and a switch element which are connected in series between the drive circuit and the first detection resistor, wherein the resistance value of the identification resistor is greater than that of the first detection resistor;
the power supply driving device comprises two modes, in the current detection mode, the controller provides a plurality of voltage values in a first voltage range to the auxiliary identification circuit through the driving circuit, the voltage values all reach the conducting voltage of the switching element, the switching element is conducted, and current flows through the identification resistor; after determining the resistance value of the identification resistor according to the voltage values, the voltage and the resistance value of the first detection resistor, the controller determines a preset load current which corresponds to the resistance value of the identification resistor, and enters a normal working mode;
in the normal working mode, the controller provides a preset load current to the load through the driving circuit, the switching element is turned off, and the power consumption of the auxiliary identification circuit is zero; the light source load emits light.
2. The power supply driving apparatus according to claim 1, further comprising a voltage detection mode,
in the voltage detection mode, the controller provides a second voltage to the auxiliary identification circuit through the driving circuit, the switching element is turned off, and the identification resistor does not carry current; the controller determines the maximum driving voltage of the load corresponding to the second voltage and enters a normal working mode;
in the normal working mode, the controller provides a voltage value which does not exceed the maximum driving voltage of the load to the load through a driving circuit;
and the voltage division of the first detection resistor is 0 under the second voltage.
3. The power supply driving apparatus according to claim 2, further comprising a load detection mode,
in the load detection mode, the controller provides a specified voltage to the auxiliary identification circuit through a driving circuit; the switching element is turned off, and the auxiliary identification circuit does not work; after the controller detects that the partial voltage of the first detection resistor is 0, determining that the light source load meets the specified specification and entering the current detection mode;
wherein the specified voltage is less than a minimum voltage value in the first voltage range.
4. The power supply driving apparatus according to any one of claims 1 to 3,
the driving circuit is provided with an input end and an output end, the controller is provided with a PWM end and an ADC end, wherein the PWM end is connected with the input end of the driving circuit, the output end of the driving circuit is connected with a load anode, and the first detection resistor is connected between the ADC end and the ground end;
the auxiliary identification circuit is provided with an input end and an identification end, the input end of the auxiliary identification circuit is connected with the output end of the driving circuit, the identification end is connected with the ADC end, and the identification resistor is connected between the input end and the identification end of the auxiliary identification circuit.
5. The power supply driving apparatus according to claim 4,
the switching tube comprises an MOS tube Q1, the source electrode of the MOS tube Q1 is connected with the first detection resistor, the drain electrode of the MOS tube Q1 is connected with the identification resistor, and the VGS conduction threshold value of the switching element is larger than the VF value of the DS-pole reverse body diode;
the auxiliary identification circuit further comprises a high-voltage turn-off circuit, the high-voltage turn-off circuit is provided with an input end and a control end, the input end is connected with the input end of the auxiliary identification circuit, the control end is connected with the grid electrode of the MOS tube Q1, the MOS tube Q1 is turned off when the second voltage output by the driving circuit is received, the identification resistor is not electrified, and the partial voltage of the first detection resistor is 0.
6. The power supply driving apparatus according to claim 5, wherein the high voltage shutdown circuit includes: a triode Q2, a blocking voltage regulator tube Z2, a resistor R3 and a resistor R4 which are sequentially connected in series between the input end and the identification end of the auxiliary identification circuit,
the cathode of the blocking voltage regulator tube Z2 is used as the input end of the high-voltage turn-off circuit and is connected with the input end of the auxiliary identification circuit;
the base electrode of the triode Q2 is connected with the connection point of the resistor R3 and the resistor R4, and the collector electrode of the triode Q2 is used as the control end of the high-voltage turn-off circuit and is connected with the grid electrode of the MOS tube Q1; one end of the resistor R4, which is not connected with the resistor R3, is connected with the negative pole of the light source load;
after the driving circuit outputs the second voltage, the triode Q2 is turned on, and the MOS transistor Q1 is controlled to be turned off.
7. The power supply driving apparatus according to claim 5,
the auxiliary identification circuit further comprises a resistor R2 connected between the gate of the MOS transistor Q1 and the input end of the auxiliary identification circuit;
the power supply driving device further comprises a protection voltage regulator Z1, wherein the cathode of the protection voltage regulator Z1 is connected with the grid electrode of the MOS tube Q1, the anode of the protection voltage regulator Z1 is connected with the source electrode of the MOS tube Q1, and the protection voltage regulator Z1 is configured to limit the VGS voltage of the MOS tube Q1 not to exceed the maximum allowable voltage value.
8. The powered driving device of any of claims 1-3 wherein the identification resistor has a resistance that is N times the first detection resistor, where N is greater than 50 and less than 100.
9. The power supply driving apparatus according to any one of claims 1 to 3,
the first detection resistor is further connected with the cathode of the light source load, and is configured to provide a current and/or voltage signal of the light source load in a light-emitting state to the controller, so that the controller can detect the working state of the light source load.
10. The power supply driving apparatus according to claim 9, wherein the 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 controller or the external voltage control circuit, and the switching tube is controlled to be conducted by the control signal to short circuit the first detection resistor in the normal working mode.
11. The power supply driving apparatus according to claim 10, wherein the 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 in the normal working mode so as to provide a current and/or voltage signal of the light source load in a light-emitting state to the controller, so that the controller can detect the working state of the light source load;
the resistance value of the second detection resistor is smaller than that of the first detection resistor.
12. The power supply driving device according to claim 10 or 11, wherein the switching tube comprises a triode or a MOS tube.
13. A light fixture, comprising:
the power driving apparatus for automatically matching a multi-specification light source load as claimed in any one of claims 1 to 12;
and the light source load is connected with the power supply driving device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921044524.5U CN210609797U (en) | 2019-07-05 | 2019-07-05 | Power supply driving equipment capable of automatically matching multi-specification light source loads and lamp |
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| CN201921044524.5U CN210609797U (en) | 2019-07-05 | 2019-07-05 | Power supply driving equipment capable of automatically matching multi-specification light source loads and lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110461056A (en) * | 2019-07-05 | 2019-11-15 | 欧普照明股份有限公司 | The more specification light source loads of Auto-matching for electric drive, lamps and lanterns and driving method |
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2019
- 2019-07-05 CN CN201921044524.5U patent/CN210609797U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110461056A (en) * | 2019-07-05 | 2019-11-15 | 欧普照明股份有限公司 | The more specification light source loads of Auto-matching for electric drive, lamps and lanterns and driving method |
| CN110461056B (en) * | 2019-07-05 | 2024-04-09 | 欧普照明股份有限公司 | Power supply driving, lamp and driving method capable of automatically matching loads of multiple light sources |
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