CN111511067A - Control circuit and lamp - Google Patents
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- CN111511067A CN111511067A CN202010013460.3A CN202010013460A CN111511067A CN 111511067 A CN111511067 A CN 111511067A CN 202010013460 A CN202010013460 A CN 202010013460A CN 111511067 A CN111511067 A CN 111511067A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The embodiment of the invention discloses a control circuit and a lamp, wherein the circuit comprises: the control unit is used for controlling charging of the control circuit, and when current is input into the control circuit, the control unit outputs a low-level signal to realize power supply operation; the first protection unit is connected with the control unit and used for controlling the on-off of the control circuit, and when the control circuit is short-circuited, the first protection unit cuts off the current input of the control single circuit; the rectifying unit is connected with the first protection unit and is used for rectifying the current input into the control circuit; and the adjusting unit is connected with the first protection unit and is used for adjusting the current input into the control circuit. In addition, the embodiment of the invention also discloses a lamp applying the control circuit. By adopting the invention, the effective control of the lamp driving power supply can be realized, and the safety of power utilization is ensured.
Description
Technical Field
The invention relates to the technical field of lamps, in particular to a control circuit and a lamp.
Background
With the development of science and technology, the forms and functions of lamps are more and more abundant, for example, a lamp prepared by using L ED as a new light source is widely applied to daily life of people based on the energy-saving and high-brightness characteristics of a L ED light source, and the main function of a drive circuit of a L ED power supply is to convert an alternating current voltage into a direct current voltage and simultaneously complete matching with the voltage and current of a L ED.
Therefore, how to realize safe power supply of the lamp is a problem to be solved urgently in the prior art.
Disclosure of Invention
In view of this, the invention provides a control circuit and a lamp, which are used for solving the problem that the power consumption safety of a power supply driving circuit of the lamp in the prior art cannot be guaranteed, so as to realize effective control on a power supply and guarantee the power consumption safety of the lamp.
The technical scheme of the embodiment of the invention is as follows:
a control circuit, comprising:
the control unit is used for controlling charging of the control circuit, and when current is input into the control circuit, the control unit outputs a low-level signal to realize power supply operation;
the first protection unit is connected with the control unit and used for controlling the on-off of the control circuit, and when the control circuit is short-circuited, the first protection unit cuts off the current input of the control single circuit;
the rectifying unit is connected with the first protection unit and is used for rectifying the current input into the control circuit;
and the adjusting unit is connected with the first protection unit and is used for adjusting the current input into the control circuit.
Optionally, the control unit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first triode, and a first control chip;
one end of the second resistor is grounded with one end of the third resistor, the other end of the second resistor is connected with one end of the first resistor, the other end of the first resistor is connected with the other end of the third resistor, and the connecting end of the first resistor and the third resistor is connected with the base electrode of the first triode;
the emitter of the first triode is grounded, the collector of the first triode is connected with one end of the fourth resistor, and the other end of the fourth resistor is connected with the first control chip;
the first control chip is connected with the collector of the first triode.
Optionally, the first protection unit includes a first MOS transistor, a second triode, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, and a second control chip;
one end of the thirteenth resistor is connected with a power supply and a drain electrode of the first MOS tube, the other end of the thirteenth resistor is connected with the fourteenth resistor and a grid electrode of the first MOS tube, the other end of the fourteenth resistor is connected with a collector electrode of the second triode, and a source electrode of the first MOS tube is connected with the rectifying unit and a power supply input end of the second control chip;
an emitting electrode of the second triode is grounded, a base electrode of the second triode is connected with the fifteenth resistor, and the other end of the fifteenth resistor is connected with an enabling end of the first control chip.
Optionally, the rectifying unit includes a second MOS transistor, an eleventh capacitor, a twentieth resistor, a twenty-first resistor, and a twenty-second resistor;
one end of the twenty-first resistor and one end of the twenty-second resistor are connected with one end of the twentieth resistor and the source electrode of the second MOS tube after being connected in parallel, the other end of the twenty-first resistor and the other end of the twenty-second resistor are connected with one end of the eleventh capacitor after being connected in parallel, and the other end of the twentieth resistor is connected with the other end of the eleventh capacitor;
the grid electrode of the second MOS tube is connected with the second control chip, and the drain electrode of the second MOS tube is connected with the first protection unit.
Optionally, the adjusting unit includes a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, and a tenth capacitor;
and after the sixteenth resistor, the seventeenth resistor and the eighteenth resistor are connected in series, one end of the sixteenth resistor, the seventeenth resistor and the eighteenth resistor are grounded, the other end of the sixteenth resistor is connected with one end of the nineteenth resistor and one end of the tenth capacitor, the other end of the tenth capacitor is grounded, and the other end of the nineteenth resistor is connected with the pulse controller.
Optionally, the control circuit further comprises:
the filtering unit is connected with the first protection unit and is used for filtering the current input into the control circuit;
the energy storage unit is connected with the output end of the filtering unit and the rectifying unit and is used for storing the electric energy output by the second control chip;
the second protection unit is connected with the energy storage unit and the rectifying unit and used for preventing the control circuit from generating a reverse flow phenomenon;
the third protection unit is connected with the second control chip and used for preventing the control circuit from generating an overvoltage phenomenon;
and the power supply unit is connected with the first protection unit and the control unit and is used for providing electric energy for the first control chip.
Optionally, the filtering unit includes a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, and a ninth capacitor, where after the fifth capacitor and the sixth capacitor are connected in parallel, one end of the fifth capacitor is grounded, and the other end of the fifth capacitor is connected to the source of the first MOS transistor;
after the seventh capacitor, the eighth capacitor and the ninth capacitor are connected in parallel, one end of the seventh capacitor is grounded, and the other end of the seventh capacitor is connected with the source electrode of the first MOS tube;
the energy storage unit comprises an inductor, one end of the inductor is connected with the second control chip and the filtering unit, and the other end of the inductor is connected with a second protection unit;
the power supply unit comprises a diode, a first voltage-stabilizing diode, a second capacitor and a third control chip, wherein the anode of the diode is connected with a power supply, the cathode of the diode is connected with one end of the third control chip and one end of the second capacitor, the anode of the first voltage-stabilizing diode is connected with one end of the other end of the second capacitor, and the cathode of the first voltage-stabilizing diode is connected with the first control chip and the third control chip;
the second protection unit comprises a fourteenth capacitor, a fifteenth capacitor, a second voltage stabilizing diode and a light emitting diode, wherein after the fourteenth capacitor and the fifteenth capacitor are connected in parallel, one end of the fourteenth capacitor is grounded, the other end of the fourteenth capacitor is connected with the cathode of the second voltage stabilizing diode and the anode of the light emitting diode, the anode of the second voltage stabilizing diode is connected with the inductor, and the cathode of the light emitting diode is grounded;
the second voltage stabilizing diode plays a role in stabilizing voltage, and the light emitting diode plays a role in indicating;
the third protection unit comprises a third voltage stabilizing diode, a fourth voltage stabilizing diode, a twenty-sixth resistor and a twenty-seventh resistor, the third voltage stabilizing diode, the fourth voltage stabilizing diode and the twenty-seventh resistor are connected in parallel, the anode of the third voltage stabilizing diode is connected with one end of the twenty-sixth resistor, the second control chip is connected with the other end of the twenty-sixth resistor, the anode of the fourth voltage stabilizing diode is connected with the cathode of the third voltage stabilizing diode, and the cathode of the fourth voltage stabilizing diode is connected with the twenty-seventh resistor.
Optionally, the control circuit further comprises an indication unit and a switch unit;
the indicating unit comprises at least one L ED lamp, each L ED lamp is connected with the second protection circuit and the third protection circuit, and the indicating unit plays a role in indicating;
the switch unit is connected with the first control chip and used for controlling the state of the control circuit, and the state comprises an opening state and a closing state.
A luminaire comprising a control circuit as described above.
Optionally, the lamp comprises a driving unit, a key unit and a discharging unit, wherein the driving unit comprises a control unit, a first protection unit, a rectifying unit, an adjusting unit, a filtering unit, an energy storage unit, a second protection unit, a third protection unit and a power supply unit; the key unit comprises an indicating unit and a switch unit; the discharge unit is a light source;
the driving unit is connected with the key unit after being cast, and the key unit adopts an intrinsic safety explosion-proof structure;
the driving unit is connected with the key and then arranged in the increased installation cavity and then connected with the discharging unit.
The embodiment of the invention has the following beneficial effects:
after the control circuit and the lamp are adopted, in the actual operation process, only when the control unit generates a low level signal, the control circuit can be powered by the external power supply; if the control circuit has a short circuit phenomenon, a high-level signal can be generated through the first protection unit, the input of current is cut off, and the control circuit is protected; meanwhile, the input current is rectified through the rectifying unit, and the current input size of the control circuit is adjusted through the adjusting unit according to actual requirements. In this embodiment, based on the control operation of the control unit and the first protection unit on the current input end and the adjustment operation of the rectification and adjustment unit of the rectification unit on the current magnitude, the safe power supply through the control circuit can be realized, and the magnitude of the input current can be controlled according to the actual requirement, so as to realize the safe power supply to the lamp; simultaneously, this embodiment connects through the wire after drive unit waters and adopts the explosion-proof key unit of this ampere of to set up drive unit and key unit jointly and increasing an intracavity, can realize lamps and lanterns when having explosion-proof function, can also realize through button control, and possess the display function.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
FIG. 1 is a schematic diagram of the control circuit in one embodiment;
FIG. 2 is a schematic circuit diagram of a portion of the control circuit in one embodiment;
FIG. 3 is a schematic circuit diagram of a portion of the control circuit in another embodiment;
FIG. 4 is a schematic diagram of the control circuit according to another embodiment;
FIG. 5 is a schematic circuit diagram of the indicating unit and the switching unit in one embodiment;
fig. 6 is a schematic view of the structure of the lamp according to an embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to solve the problem of charging safety of a lamp in a power supply process in the prior art, in this embodiment, a control circuit is particularly provided to realize power supply control of the lamp.
As shown in fig. 1, the control circuit 100 includes a control unit 101, a first protection unit 102, a rectification unit 103, and a regulation unit 104; the control unit 101 is connected to the first protection unit 102, and the first protection unit 102 is further connected to the rectification unit 103 and the adjustment unit 104.
In a specific embodiment, the control unit 101 performs charging control on the control circuit 100, specifically, when the control circuit 100 has a current input, the control unit 101 outputs a low level signal, and at this time, the control of power supply through the control unit 101 is implemented; such as powering a lamp via the control circuit 100.
During the power supply process through the control circuit 100, the first protection unit 102 prevents a short circuit phenomenon during the power supply process; specifically, when the control circuit 100 is short-circuited, the first protection unit 102 outputs a high level signal, and simultaneously cuts off the current input to the control circuit 100, so as to control the on/off of the control circuit 100, thereby avoiding the circuit fault occurring when the short-circuit occurs.
In addition, the control circuit 100 rectifies the current input to the control circuit through the rectifying unit 103, and adjusts the current through the adjusting unit 104, so as to meet different power supply requirements through the control circuit 100.
The control circuit 100 of the embodiment can realize control over current input, and can cut off the current input in time when phenomena such as short circuit occur in the power supply process, so that the safety of power supply control is improved; and, can realize adjusting the power supply size to satisfy different power supply demands.
In one embodiment, as shown in fig. 2, the control unit 101 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first transistor Q1, and a first control chip U1; one end of the second resistor R2 is grounded with one end of the third resistor R3, the other end of the second resistor R2 is connected with one end of the first resistor R1, the other end of the first resistor R1 is connected with the other end of the third resistor R3, and the connecting ends of the first resistor R1 and the third resistor R3 are connected with the base b of the first triode Q1; the emitter e of the first triode Q1 is grounded, the collector c of the first triode is connected with one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected with the first control chip U1, and the first control chip U1 is also connected with the collector c of the first triode Q1.
When current is input, namely power is supplied or charged for the control circuit through an external power supply, the current is input and then transmitted to the first triode Q1 through the first resistor R1, the second resistor R2 and the third resistor R3, at the moment, the first triode Q1 is conducted, and the emitter e of the first triode Q1 is grounded, so that the CHA pin of the first control chip U1 is pulled down, and power supply or charging for the first control chip U1 through the +5V pin is further achieved. In contrast, when no current is input, the first transistor Q1 is turned off, thereby implementing the power supply control operation of the control circuit 100 by the control unit 101.
The control circuit 100 of the present embodiment is turned on only when a current is input, and the control unit 101 can control the charging of the control circuit 100, thereby improving the safety of the charging.
In one embodiment, as shown in fig. 3, the first protection unit 102 includes a first MOS transistor Q2, a second transistor Q3, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, and a second control chip U2; one end of a thirteenth resistor R13 is connected with a power supply and the drain D of the first MOS tube Q2, the other end of the thirteenth resistor R13 is connected with a fourteenth resistor R14 and the gate G of the first MOS tube Q2, the other end of the fourteenth resistor R14 is connected with the collector c of the second triode Q3, and the source S of the first MOS tube Q2 is connected with the power supply input end of the rectifying unit 103 and the second control chip U2; an emitter e of the second triode Q3 is grounded, a base b of the second triode Q3 is connected with a fifteenth resistor R15, and the other end of the fifteenth resistor R15 is connected with an enable end EN1 of the first control chip U1.
In the normal power supply process of the control circuit 100, that is, when the control circuit is normally charged or powered by the external power supply, the enable terminal EN1 of the first control chip U1 outputs a low level, at this time, the second triode Q3 is turned off, the gate G of the first MOS transistor Q2 is a high level, and the first MOS transistor Q2 is turned on, so that the external power supply can supply power to the input terminal VIN of the second control chip U2 through the thirteenth resistor R13 and the first MOS transistor Q2. When the control circuit 100 has a fault such as a short circuit, the enable terminal EN1 of the first control chip U1 outputs a high level, at this time, the second triode Q3 is turned on, because the emitter e of the second triode Q3 is grounded, the gate of the first MOS transistor Q2 is at a low level at this time, and the first MOS transistor Q2 is turned off, so that the input current of the external power supply cannot supply power to the input terminal VIN of the second control chip U2.
The control circuit 100 of the embodiment can cut off the power input in time through the first protection unit 102 when a fault occurs, thereby ensuring the power supply safety of the whole control circuit 100 and avoiding the occurrence of loss caused by an accident due to circuit fault.
In one embodiment, as shown in fig. 3, the rectifying unit 103 includes a second MOS transistor Q4, an eleventh capacitor C11, a twentieth resistor R20, a twenty-first resistor R21, and a twenty-second resistor R22; one end of a twenty-first resistor R21 and one end of a twenty-second resistor R22 are connected in parallel and then are connected with one end of a twentieth resistor R20 and a source S of a second MOS transistor Q4, the other end of the twenty-first resistor R21 and the other end of the twenty-second resistor R22 are connected in parallel and then are connected with one end of an eleventh capacitor C11, and the other end of the twentieth resistor R20 is connected with the other end of the eleventh capacitor C11; the gate G of the second MOS transistor Q4 is connected to the DR terminal of the second control chip U2, and the drain D of the second MOS transistor Q4 is connected to the first protection unit 102.
In the embodiment, the second MOS transistor Q4, in combination with the eleventh capacitor C11, the twentieth resistor R20, the twenty-first resistor R21 and the twenty-second resistor R22, implements a rectification function, and specifically implements a rectification operation by adjusting the duty ratio of the second MOS transistor Q4.
The control circuit 100 of the present embodiment can implement a rectification function, so as to implement a power supply operation for the lamp, that is, in a case where the input current is ac, the input ac is converted into dc, so as to be used by the lamp, so as to implement a power supply function.
In one embodiment, as shown in fig. 3, the adjusting unit 104 includes a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, and a tenth capacitor C10; after being connected in series, one end of the sixteenth resistor R16, the seventeenth resistor R17 and the eighteenth resistor R18 is grounded, the other end of the sixteenth resistor R16, the seventeenth resistor R17 and the eighteenth resistor R18 are connected with one end of the nineteenth resistor R19 and one end of the tenth capacitor C10, the other end of the tenth capacitor C10 is grounded, and the other end of the nineteenth resistor R19 is connected with the pulse controller.
In a specific embodiment, the pulse controller sends out pulses with different frequencies to adjust the output current of the control circuit 100, so as to meet different power consumption requirements, wherein the sixteenth resistor R16, the seventeenth resistor R17, the eighteenth resistor R18 and the nineteenth resistor R19 play roles in protection and voltage reduction, and the tenth capacitor C10 plays a role in filtering.
The control circuit 100 of the embodiment can control and output currents of different magnitudes to meet different power supply requirements, which is beneficial to expanding the application field and range of the control circuit 100.
In one embodiment, as shown in fig. 4, the control circuit 100 further includes: the protection circuit comprises a filtering unit 105 connected with the first protection unit 102, an energy storage unit 106 connected with the output end of the filtering unit 105 and the rectifying unit 103, a second protection unit 107 connected with the energy storage unit 106 and the rectifying unit 103, a third protection unit 108 connected with the second control chip U2, and a power supply unit 109 connected with the first protection unit 102 and the control unit 101.
The filtering unit 105 is configured to filter a current input to the control circuit; as shown in fig. 3, the filtering unit 105 includes a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, and a ninth capacitor C9, wherein the fifth capacitor C5 may be a polar capacitor, a negative electrode of the fifth capacitor C5 and a negative electrode of the sixth capacitor C6 are connected in parallel, and then one end of the fifth capacitor C5 is grounded, and the other end (i.e., a positive electrode of the fifth capacitor C5) of the fifth capacitor C5 is connected to the source S of the first MOS transistor Q2; one end of a seventh capacitor C7, one end of an eighth capacitor C8 and one end of a ninth capacitor C9 are grounded after being connected in parallel, and the other end of the seventh capacitor C7, the eighth capacitor C8 and the ninth capacitor C9 are connected with the source S of the first MOS transistor Q2; the filtering unit 105 realizes a filtering function based on characteristics of capacitance passing high frequency resistance, low frequency resistance, and alternating current passing direct current.
The energy storage unit 106 is configured to store the electric energy output by the second control chip U2, in an embodiment, as shown in fig. 3, the energy storage unit 106 includes an inductor L, one end of the inductor L is connected to the second control chip U2 and the filtering unit 105, and the other end of the inductor L is connected to the second protection unit 107, where the magnitude of the electric energy stored in the inductor L is related to its inductance and the magnitude of the flowing current, and may be represented by the relationship E L I2/2, E for inductive L storageL is the inductance of the inductor, and I is the magnitude of the current flowing through the inductor.
The power supply unit 109 is used for supplying power to the first control chip U1; in one embodiment, as shown in fig. 2, the power supply unit 109 includes a diode D1, a first zener diode D2, a second capacitor C2, and a third control chip U3; the anode of the diode D1 is connected to the power supply, the cathode of the diode D1 is connected to one end of the third control chip U3 and one end of the second capacitor C2, the anode of the first zener diode D2 is connected to one end of the other end of the second capacitor C2, and the cathode of the first zener diode D2 is connected to the first control chip U1 and the third control chip U3.
The third control chip U3 is a voltage regulator chip, such as 7550 voltage regulator chip. In practical application, based on the unidirectional conduction characteristic of the diode D1, the phenomenon that the second capacitor C2 discharges to the power supply in a reverse flow manner after charging is completed can be prevented, and the safety of power utilization is improved; meanwhile, the voltage input to the first control chip U1 can be ensured to be within a safe range through the voltage stabilizing operation of the first voltage stabilizing diode D2, and a protection effect is achieved.
In one embodiment, as shown in fig. 3, the second protection unit 107 includes a fourteenth capacitor C14, a fifteenth capacitor C15, a second zener diode D3, and a light emitting diode D4, wherein the fourteenth capacitor C14 is a polar capacitor, a negative electrode of the fourteenth capacitor C14 and a fifteenth capacitor C15 are connected in parallel, and then one end of the fourteenth capacitor C14 is grounded, another point (i.e., a positive electrode of the fourteenth capacitor C14) of the fourteenth capacitor C14 is connected to a cathode of the second zener diode D3 and an anode of the light emitting diode D4, an anode of the second zener diode D3 is connected to the inductor L, and a cathode of the light emitting diode D4 is grounded.
In practice, the second zener diode D3 plays a role of voltage stabilization, and the light emitting diode D4 plays a role of indication, specifically, based on the unidirectional conduction characteristic of the second zener diode D3, the second zener diode D3 can be turned on only when the current flows from the anode to the cathode of the second zener diode D3, so as to ensure that the current flowing to the lamp, such as the L ED lamp shown in fig. 3, is within the preset magnitude range, without the excessive supply current of the lamp, and the current input to the lamp is filtered through the fourteenth capacitor C14 and the fifteenth capacitor C15.
In addition, when the current input to the lamp is too large, the alarm is given through the indicating function of the light emitting diode D4, so that the countermeasure can be taken quickly, and the loss caused by the fault is reduced.
The third protection unit 108 is used for preventing the control circuit 100 from overvoltage; in one embodiment, as shown in fig. 3, the third protection unit 108 includes a third zener diode D5, a fourth zener diode D6, a twenty-sixth resistor R26, and a twenty-seventh resistor R27; wherein, third zener diode D5, fourth zener diode D5, twenty-seventh resistance R27 are parallelly connected, just the positive pole of third zener diode with the one end of twenty-sixth resistance the second control chip is connected, the other termination power supply of twenty-sixth resistance, the positive pole of fourth zener diode with the negative pole of third zener diode is connected, the negative pole of fourth zener diode is connected twenty-seventh resistance.
The third protection unit 108 is connected to the feedback terminal FB of the second control chip U2, and based on the voltage stabilizing effect of the third zener diode D5 and the fourth zener diode D6, the fault caused by boosting of the L ED open circuit can be effectively prevented when the control circuit 100 supplies power to the lamp, that is, the voltage stabilizing operation is performed on the voltage input to L ED, so that the power utilization safety is ensured.
In one embodiment, the control circuit 100 further comprises an indicating unit and a switch unit, wherein the indicating unit comprises at least one L ED lamp, each L ED lamp is connected with the second protection circuit 107 and the third protection circuit 108, the indicating unit plays a role in indicating, and the switch unit is connected with the first control chip U1 and is used for controlling the state of the control circuit 100, and the state comprises an on state and an off state.
The indicating unit can be used for showing the charging condition of a lamp provided with a control circuit, such as the charging quantity of the lamp, when one L ED lamp is turned on, the charging quantity of the lamp is 25%, when two L ED lamps are turned on, the charging quantity of the lamp is 50%, and so on until 4L ED lamps are turned on, the lamp charging is finished, and the control circuit is started or stopped through the switching unit in the charging or power supply process.
In other embodiments, the switching unit may be implemented by a device having a function of controlling the disconnection, such as a relay.
The control circuit 100 of the present embodiment can implement safe power supply or charging operations for devices such as a lamp connected to the control circuit 100 based on the control unit 101, the first protection unit 102, the rectification unit 103, the adjustment unit 104, and the like, and simultaneously provide currents of different magnitudes to meet different power consumption requirements.
In other embodiments, the control circuit 100 further includes a sampling unit and a detection unit, as shown in fig. 2, the sampling unit may be implemented by a twelfth capacitor C12, a thirteenth capacitor C13 and a twenty-third resistor R23, wherein the twelfth capacitor C12 and the thirteenth capacitor C13 may adopt aluminum foil capacitor capacitors. The detection unit is realized through a twenty-fourth resistor R24 and a twenty-fifth resistor R25, and is particularly sent to a BATD1 port of the first control chip after voltage division is carried out through the twenty-fourth resistor R24 and the twenty-fifth resistor R25, so that whether the voltage of the external power supply is normal or not is detected, and the safety of power utilization is guaranteed.
In one embodiment, as shown in fig. 6, a luminaire 300 specifically includes a driving unit 301, a key unit 302, and a discharging unit 303, where the driving unit 301 includes a control unit 101, a first protection unit 102, a rectifying unit 103, a regulating unit 104, a filtering unit 105, an energy storage unit 106, a second protection unit 107, a third protection unit 108, and a power supply unit 109 in the control circuit, the key unit 302 includes an indicating unit and a switching unit in the control circuit, and the discharging unit 303 is a light source, such as an L ED lamp.
The driving unit 301 is connected with the key unit 302 after being cast, and the key unit 302 adopts an intrinsic safety explosion-proof structure; specifically, the driving unit 301 and the key unit 302 are connected through a wire, and are arranged in the increased installation cavity after being connected. The discharge unit 303 is disposed in a cavity, and the cavity is explosion-proof and explosion-proof.
In a specific embodiment, the driving unit 301 and the key unit 302 are connected by a wire and then disposed in the mounting cavity and then connected to the discharging unit 303, which may be implemented by a mechanical connection manner such as welding.
The lamp 300 of the embodiment has an explosion-proof function, and when the lamp has a key or a display screen, the lamp can still be well protected, and the control operation of the lamp is realized through the key, or the actual state of the lamp, such as the electric quantity state, is displayed through the display screen.
In addition, it should be specifically noted that the specific circuit structure and principle of the lamp 300 for implementing control are consistent with those of the control circuit, and specific reference may be made to the above contents, which is not described herein again.
After the control circuit and the lamp are adopted, in the actual operation process, only when the control unit generates a low level signal, the control circuit can be powered by the external power supply; if the control circuit has a short circuit phenomenon, a high-level signal can be generated through the first protection unit, the input of current is cut off, and the control circuit is protected; meanwhile, the input current is rectified through the rectifying unit, and the current input size of the control circuit is adjusted through the adjusting unit according to actual requirements. In this embodiment, based on the control operation of the control unit and the first protection unit on the current input end and the adjustment operation of the rectification and adjustment unit of the rectification unit on the current magnitude, the safe power supply through the control circuit can be realized, and the magnitude of the input current can be controlled according to the actual requirement, so as to realize the safe power supply to the lamp; simultaneously, this embodiment connects through the wire after drive unit waters and adopts the explosion-proof key unit of this ampere of to set up drive unit and key unit jointly and increasing an intracavity, can realize lamps and lanterns when having explosion-proof function, can also realize through button control, and possess the display function.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (10)
1. A control circuit, comprising:
the control unit is used for controlling charging of the control circuit, and when current is input into the control circuit, the control unit outputs a low-level signal to realize power supply operation;
the first protection unit is connected with the control unit and used for controlling the on-off of the control circuit, and when the control circuit is short-circuited, the first protection unit cuts off the current input of the control single circuit;
the rectifying unit is connected with the first protection unit and is used for rectifying the current input into the control circuit;
and the adjusting unit is connected with the first protection unit and is used for adjusting the current input into the control circuit.
2. The control circuit of claim 1, wherein the control unit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first triode, and a first control chip;
one end of the second resistor is grounded with one end of the third resistor, the other end of the second resistor is connected with one end of the first resistor, the other end of the first resistor is connected with the other end of the third resistor, and the connecting end of the first resistor and the third resistor is connected with the base electrode of the first triode;
the emitter of the first triode is grounded, the collector of the first triode is connected with one end of the fourth resistor, and the other end of the fourth resistor is connected with the first control chip;
the first control chip is connected with the collector of the first triode.
3. The control circuit of claim 2, wherein the first protection unit comprises a first MOS transistor, a second triode, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, and a second control chip;
one end of the thirteenth resistor is connected with a power supply and a drain electrode of the first MOS tube, the other end of the thirteenth resistor is connected with the fourteenth resistor and a grid electrode of the first MOS tube, the other end of the fourteenth resistor is connected with a collector electrode of the second triode, and a source electrode of the first MOS tube is connected with the rectifying unit and a power supply input end of the second control chip;
an emitting electrode of the second triode is grounded, a base electrode of the second triode is connected with the fifteenth resistor, and the other end of the fifteenth resistor is connected with an enabling end of the first control chip.
4. The control circuit according to claim 3, wherein the rectifying unit comprises a second MOS transistor, an eleventh capacitor, a twentieth resistor, a twenty-first resistor and a twenty-second resistor;
one end of the twenty-first resistor and one end of the twenty-second resistor are connected with one end of the twentieth resistor and the source electrode of the second MOS tube after being connected in parallel, the other end of the twenty-first resistor and the other end of the twenty-second resistor are connected with one end of the eleventh capacitor after being connected in parallel, and the other end of the twentieth resistor is connected with the other end of the eleventh capacitor;
the grid electrode of the second MOS tube is connected with the second control chip, and the drain electrode of the second MOS tube is connected with the first protection unit.
5. The control circuit of claim 2, wherein the adjustment unit includes a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, and a tenth capacitor;
and after the sixteenth resistor, the seventeenth resistor and the eighteenth resistor are connected in series, one end of the sixteenth resistor, the seventeenth resistor and the eighteenth resistor are grounded, the other end of the sixteenth resistor is connected with one end of the nineteenth resistor and one end of the tenth capacitor, the other end of the tenth capacitor is grounded, and the other end of the nineteenth resistor is connected with the pulse controller.
6. The control circuit of claim 4, wherein the control circuit further comprises:
the filtering unit is connected with the first protection unit and is used for filtering the current input into the control circuit;
the energy storage unit is connected with the output end of the filtering unit and the rectifying unit and is used for storing the electric energy output by the second control chip;
the second protection unit is connected with the energy storage unit and the rectifying unit and used for preventing the control circuit from generating a reverse flow phenomenon;
the third protection unit is connected with the second control chip and used for preventing the control circuit from generating an overvoltage phenomenon;
and the power supply unit is connected with the first protection unit and the control unit and is used for providing electric energy for the first control chip.
7. The control circuit according to claim 6, wherein the filter unit includes a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor and a ninth capacitor, one end of the fifth capacitor and the sixth capacitor is grounded after being connected in parallel, and the other end of the fifth capacitor and the sixth capacitor is connected to the source of the first MOS transistor;
after the seventh capacitor, the eighth capacitor and the ninth capacitor are connected in parallel, one end of the seventh capacitor is grounded, and the other end of the seventh capacitor is connected with the source electrode of the first MOS tube;
the energy storage unit comprises an inductor, one end of the inductor is connected with the second control chip and the filtering unit, and the other end of the inductor is connected with a second protection unit;
the power supply unit comprises a diode, a first voltage-stabilizing diode, a second capacitor and a third control chip, wherein the anode of the diode is connected with a power supply, the cathode of the diode is connected with one end of the third control chip and one end of the second capacitor, the anode of the first voltage-stabilizing diode is connected with one end of the other end of the second capacitor, and the cathode of the first voltage-stabilizing diode is connected with the first control chip and the third control chip;
the second protection unit comprises a fourteenth capacitor, a fifteenth capacitor, a second voltage stabilizing diode and a light emitting diode, wherein after the fourteenth capacitor and the fifteenth capacitor are connected in parallel, one end of the fourteenth capacitor is grounded, the other end of the fourteenth capacitor is connected with the cathode of the second voltage stabilizing diode and the anode of the light emitting diode, the anode of the second voltage stabilizing diode is connected with the inductor, and the cathode of the light emitting diode is grounded;
the second voltage stabilizing diode plays a role in stabilizing voltage, and the light emitting diode plays a role in indicating;
the third protection unit comprises a third voltage stabilizing diode, a fourth voltage stabilizing diode, a twenty-sixth resistor and a twenty-seventh resistor, the third voltage stabilizing diode, the fourth voltage stabilizing diode and the twenty-seventh resistor are connected in parallel, the anode of the third voltage stabilizing diode is connected with one end of the twenty-sixth resistor, the second control chip is connected with the other end of the twenty-sixth resistor, the anode of the fourth voltage stabilizing diode is connected with the cathode of the third voltage stabilizing diode, and the cathode of the fourth voltage stabilizing diode is connected with the twenty-seventh resistor.
8. The control circuit of claim 6, further comprising an indication unit and a switch unit;
the indicating unit comprises at least one L ED lamp, each L ED lamp is connected with the second protection circuit and the third protection circuit, and the indicating unit plays a role in indicating;
the switch unit is connected with the first control chip and used for controlling the state of the control circuit, and the state comprises an opening state and a closing state.
9. A luminaire characterized in that it comprises a control circuit as claimed in any one of claims 1 to 8.
10. The lamp according to claim 9, wherein the lamp comprises a driving unit, a key unit and a discharging unit, the driving unit comprises a control unit, a first protection unit, a rectifying unit, a regulating unit, a filtering unit, an energy storage unit, a second protection unit, a third protection unit and a power supply unit; the key unit comprises an indicating unit and a switch unit; the discharge unit is a light source;
the driving unit is connected with the key unit after being cast, and the key unit adopts an intrinsic safety explosion-proof structure;
the driving unit is connected with the key and then arranged in the increased installation cavity and then connected with the discharging unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010013460.3A CN111511067B (en) | 2020-01-07 | 2020-01-07 | Control circuit and lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010013460.3A CN111511067B (en) | 2020-01-07 | 2020-01-07 | Control circuit and lamp |
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| Publication Number | Publication Date |
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| CN111511067A true CN111511067A (en) | 2020-08-07 |
| CN111511067B CN111511067B (en) | 2022-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010013460.3A Active CN111511067B (en) | 2020-01-07 | 2020-01-07 | Control circuit and lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114245517A (en) * | 2021-11-19 | 2022-03-25 | 海洋王照明科技股份有限公司 | Intrinsic safety emergency driving circuit |
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| CN103187738A (en) * | 2011-12-28 | 2013-07-03 | 海洋王照明科技股份有限公司 | Charging circuit and charger |
| CN103401209A (en) * | 2013-08-02 | 2013-11-20 | 广州视源电子科技股份有限公司 | LED backlight short-circuit protection circuit |
| CN108055731A (en) * | 2017-12-28 | 2018-05-18 | 广州爱易学智能信息科技有限公司 | Classroom blackboard LED light strip driving circuit with protective effect |
| CN207801762U (en) * | 2017-12-18 | 2018-08-31 | 深圳市兴电科技股份有限公司 | Remote power feeding central office terminal circuit and remote power feeding central office terminal |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187738A (en) * | 2011-12-28 | 2013-07-03 | 海洋王照明科技股份有限公司 | Charging circuit and charger |
| CN103401209A (en) * | 2013-08-02 | 2013-11-20 | 广州视源电子科技股份有限公司 | LED backlight short-circuit protection circuit |
| CN207801762U (en) * | 2017-12-18 | 2018-08-31 | 深圳市兴电科技股份有限公司 | Remote power feeding central office terminal circuit and remote power feeding central office terminal |
| CN108055731A (en) * | 2017-12-28 | 2018-05-18 | 广州爱易学智能信息科技有限公司 | Classroom blackboard LED light strip driving circuit with protective effect |
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| CN114245517A (en) * | 2021-11-19 | 2022-03-25 | 海洋王照明科技股份有限公司 | Intrinsic safety emergency driving circuit |
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| CN111511067B (en) | 2022-08-19 |
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