CN212812103U - Drive switching circuit and lighting device - Google Patents
Drive switching circuit and lighting device Download PDFInfo
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- CN212812103U CN212812103U CN202021551901.7U CN202021551901U CN212812103U CN 212812103 U CN212812103 U CN 212812103U CN 202021551901 U CN202021551901 U CN 202021551901U CN 212812103 U CN212812103 U CN 212812103U
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Abstract
The utility model relates to a drive switching circuit and lighting device. A drive switching circuit comprises a first drive chip, a second drive chip and a third drive chip, wherein the first drive chip comprises a first switching tube; the second driving chip comprises a second switching tube; the alternating current conversion chip is connected with the first switching tube and the second switching tube and used for converting alternating current to supply power to the first switching tube and the second switching tube; the power-on detection control chip comprises a detection control device, a third switch tube and a fourth switch tube; the detection control device is connected with the third switching tube and the fourth switching tube, is used for detecting the electrifying information of the power supply circuit, and switches on or switches off the third switching tube and the fourth switching tube according to the electrifying information; the third switching tube is connected with the first switching tube and used for switching off the first switching tube when the third switching tube is switched on; the fourth switch tube is connected with the second switch tube and used for switching off the second switch tube when the fourth switch tube is switched on. The driving switching circuit of the lighting device saves the use of a relay, and reduces the volume of related products (such as lighting devices).
Description
Technical Field
The utility model relates to a control technical field especially relates to a drive switching circuit and lighting device.
Background
With the development of the electronic industry, there is a general need in the market for a device capable of selectively switching a plurality of load outputs (for example, a lighting device capable of selectively switching the lighting outputs of a plurality of light source modules).
At present, as shown in fig. 1, the conventional selective load output mode in the market generally controls two driving power chips through a front-end switch signal identification and switching output control circuit and two additional independent breakers, so as to realize selective output of different loads.
The method needs a plurality of relays, so that the product size is large, and the market application prospect of the product is further limited.
SUMMERY OF THE UTILITY MODEL
In view of this, it is necessary to provide a drive switching circuit and a lighting device capable of reducing the volume.
A drive switching circuit comprising:
the first driving chip comprises a first switching tube and is used for driving a first load when the first switching tube is conducted;
the second driving chip comprises a second switching tube and is used for driving a second load when the second switching tube is conducted;
the alternating current conversion chip is connected with the first switching tube and the second switching tube and used for converting alternating current to supply power to the first switching tube and the second switching tube;
the power-on detection control chip comprises a detection control device, a third switch tube and a fourth switch tube; the detection control device is connected with the third switching tube and the fourth switching tube, and is used for detecting the electrifying information of a power supply line and switching on or off the third switching tube and the fourth switching tube according to the electrifying information; the third switching tube is connected with the first switching tube and used for turning off the first switching tube when the third switching tube is conducted; and the fourth switching tube is connected with the second switching tube and used for switching off the second switching tube when the fourth switching tube is switched on.
In one of the embodiments, the first and second electrodes are,
the first switch tube is an N-type field effect tube, the third switch tube comprises a first end, a second end and a third end, the first end is connected with the detection control device, the second end is grounded, the third end is connected with the first switch tube, and the first end conducts the second end and the third end according to the electrifying information;
and/or the presence of a gas in the gas,
the second switch tube is an N-type field effect tube, the fourth switch tube comprises a fourth end, a fifth end and a sixth end, the fourth end is connected with the detection control device, the fifth end is grounded, the sixth end is connected with the second switch tube, and the fourth end is connected with the fifth end and the sixth end according to the electrifying information.
In one embodiment, the third switching tube is an N-type switching MOS tube, a P-type switching MOS tube, or a switching triode;
and/or the presence of a gas in the gas,
the fourth switch tube is an N-type switch MOS tube or a P-type switch MOS tube or a switch triode.
In one of the embodiments, the first and second electrodes are,
the driving switching circuit further comprises a first current limiting resistor, and the first current limiting resistor is connected between the third end of the third switching tube and the first switching tube;
and/or the presence of a gas in the gas,
the driving switching circuit further comprises a second current limiting resistor, and the second current limiting resistor is connected between the sixth end of the fourth switching tube and the second switching tube.
In one embodiment, the drive switching circuit further includes an energy storage device, and the energy storage device is connected to the energization detection control chip and is configured to supply power to the energization detection control chip when the detection control device detects that the energization information is not energized.
In one embodiment, the energy storage device is a capacitor, the power-on detection control chip further includes a first input pin, a second input pin, and a unidirectional conductive device, the first input pin is connected to the detection control device, the second input pin is connected to the energy storage device, and the unidirectional conductive device is connected between the first input pin and the second input pin.
In one of the embodiments, the first and second electrodes are,
the driving switching circuit further comprises a first voltage stabilizing device, one end of the first voltage stabilizing device is connected with the first switching tube, and the other end of the first voltage stabilizing device is grounded;
and/or the presence of a gas in the gas,
the driving switching circuit further comprises a second voltage stabilizing device, one end of the second voltage stabilizing device is connected with the second switching tube, and the other end of the second voltage stabilizing device is grounded.
In one embodiment, the first voltage regulation device and/or the second voltage regulation device is a capacitor.
In one embodiment, the driving switching circuit further includes a first pull-up resistor and a second pull-up resistor, the first pull-up resistor is connected between the ac power conversion chip and the first switching tube, and the second pull-up resistor is connected between the ac power conversion chip and the second switching tube.
A lighting device comprises a first light source module, a second light source module and the drive switching circuit, wherein a first drive chip is connected with the first light source module, and a second drive chip is connected with the second light source module.
The drive switching circuit detects the electrifying information through the detection control device of the electrifying detection control chip and controls the on-off of the third switching tube and the fourth switching tube of the electrifying detection control chip according to the electrifying information. Meanwhile, the third switch tube controls the on-off of the first switch tube so as to control whether the first driving chip is started or not, and the fourth switch tube controls the on-off of the second switch tube so as to control whether the second driving chip is started or not. Therefore, the driving switching circuit of the lighting device can be used without a relay, and the volume of related products (such as lighting devices) is reduced. Meanwhile, the use of a relay is omitted, the product cost is reduced, and the market application prospect of related products is effectively widened.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a conventional driving switching circuit for implementing a selective load output manner;
FIG. 2 is a schematic diagram of a driving switching circuit according to an embodiment of the present application;
fig. 3 is a circuit diagram of a driving switching circuit according to an embodiment of the present application.
Description of reference numerals:
100-a first driving chip, 110-a first switch tube, 200-a second driving chip, 210-a second switch tube, 300-an alternating current conversion chip, 400-a power-on detection control chip, 410-a detection control device, 420-a third switch tube, 430-a fourth switch tube, 510-a first current limiting resistor, 520-a second current limiting resistor, 600-an energy storage device, 710-a first voltage stabilizing device, 720-a second voltage stabilizing device, 810-a first pull-up resistor, 820-a second pull-up resistor
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first resistance may be referred to as a second resistance, and similarly, a second resistance may be referred to as a first resistance, without departing from the scope of the present application. The first resistance and the second resistance are both resistances, but they are not the same resistance.
It is to be understood that "connection" in the following embodiments is to be understood as "electrical connection", "communication connection", and the like if the connected circuits, modules, units, and the like have communication of electrical signals or data with each other.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
In one embodiment, referring to fig. 2 and fig. 3, a driving switching circuit is provided, which includes a first driving chip 100, a second driving chip 200, an ac power converting chip 300, and a power-on detection control chip 400.
The first driving chip 100 and the second driving chip 200 are driving power chips. The first driving chip 100 includes a first switching tube 110. When the first switch tube 110 is turned on, the first driving chip 100 is turned on to drive the first load. The second driving chip 200 includes a second switching tube 210. When the second switch tube 210 is turned on, the second driving chip 200 is turned on to drive the second load. The first load and the second load are selectively inputted loads (for example, two light source modules may be used).
The AC conversion chip 300 may specifically include an AC/AC module, two ends of which are separately connected to a live wire end and a neutral wire end of the power supply line, so as to convert the medium AC power of the power supply line into a required AC power and input the required AC power to the driving switching circuit.
Meanwhile, the ac conversion chip 300 is connected to the first switching tube 110 of the first driving chip 100, so as to provide a turn-on voltage for the first switching tube 110. Furthermore, the ac power converting chip 300 is connected to the second switching tube 210 of the second driving chip 200, so as to provide a turn-on voltage for the second switching tube 210.
Specifically, the ac power conversion chip 300 may be connected to the first switching tube 110 through the input pin VDD of the first driving chip 100, and connected to the second switching tube 210 through the input pin VDD of the second driving chip 200.
The power-on detection control chip 400 includes a detection control device 410, a third switch tube 420 and a fourth switch tube 430. The detection control device 410 may perform detection of energization information of the power supply line.
Specifically, the power-on detection control chip 400 may further include a first input pin VCC. The detection control device 410 is connected to the first input pin VCC. The supply line inputs a current to the detection control device 410 through a first input pin VCC.
More specifically, a power supply switch S1 may also be provided between the live wire end of the power supply line and the energization detecting control chip 400.
When the power supply switch S1 is closed, the current in the power supply line may be introduced into the detection control device 410 through the first input pin VCC, and the detection control device 410 detects that the power-on information of the power supply line is being powered on. When the power supply switch S1 is turned off and the detection control device 410 detects that the voltage has dropped to the internal threshold, it is determined that the power supply switch S1 has been turned off and the energization information of the power supply line is no longer energized.
Meanwhile, the detection control device 410 turns on or off the third switching tube 420 and the fourth switching tube 430 according to the detected energization information of the power supply line.
The third switching tube 420 is connected to the first switching tube 110 of the first driving chip 100, and is used for turning off the first switching tube 110 when it is turned on. At this time, the power supply of the ac power converting chip 300 to the first switching tube 110 of the first driving chip 100 is cut off, so that the first driving chip 100 cannot be turned on and the first load cannot be driven.
The fourth switching tube 430 is connected to the second switching tube 210 of the second driving chip 200, and is used for turning off the second switching tube 210 when it is turned on. At this time, the power supply of the ac converting chip 300 to the second switching tube 210 of the second driving chip 200 is cut off, so that the second driving chip 200 cannot be turned on and the second load cannot be driven.
Therefore, when the switching circuit is driven to realize switching output of a plurality of loads in the present embodiment, the on/off modes of the corresponding third switching tube 420 and fourth switching tube 430 can be set by detecting the energization information detected by the control device 410, and thus different loads can be selectively switched to output.
As an example, it may be set that when the power supply switch S1 is closed for the first time, and the detection control device 410 detects that the energization information of the power supply line is being energized for the first time, the third switching tube 420 may be turned off first, and the fourth switching tube 430 may be turned on. At this time, the first load may be normally driven, and the second load may not be driven, thereby allowing the first load to output.
When the power supply switch S1 is opened and closed again, and the detection control device 410 detects again that the energization information of the power supply line is being energized, the third switching tube 420 may be turned on, and the fourth switching tube 430 may be turned off. At this time, the first load cannot be driven, and the second load can be normally driven, thereby causing the second load to output.
When the power supply switch S1 is opened and closed again, and the detection control device 410 detects the power supply line as being powered again, the third switch tube 420 may be opened, and the fourth switch tube 430 may be opened at the same time. At this time, the first load may be normally driven, and the second load may also be normally driven, so that both the first load and the second load perform output.
Of course, the above examples are merely illustrative, and the switching method of the driving switching circuit of the present application is not limited thereto, and when the switching circuit of the present application is driven, a plurality of different switching methods may be provided according to actual needs.
In the present embodiment, the energization information is detected by the detection control device 410 of the energization detection control chip 400, and the on/off of the third switching tube 420 and the fourth switching tube 430 of the energization detection control chip 400 is controlled according to the energization information. Meanwhile, the on/off of the first switching tube 110 is controlled through the third switching tube 420, so as to control whether the first driving chip 100 is started, and the on/off of the second switching tube 210 is controlled through the fourth switching tube 420, so as to control whether the second driving chip 200 is started.
Therefore, the embodiment reduces the volume of the product by optimizing the circuit design and using the omitted relay. Meanwhile, the use of a relay is omitted, the product cost is reduced, and the market application prospect of related products (such as lighting devices) is effectively widened.
In one embodiment, the first switch tube 110 is an N-type field effect transistor. Meanwhile, the third switching tube 420 includes a first terminal, a second terminal, and a third terminal.
The first end of the third switch tube 420 is connected to the detection control device 410, and further receives the regulated voltage provided by the detection control device 410. The second terminal of the third switch tube 420 is grounded. Specifically, the second terminal may be connected to the ground pin GND of the power-on detection control chip 400. The third terminal of the third switch tube 420 is connected to the first switch tube 110. Specifically, the third terminal may be connected to the first output pin OUT1 of the power-on detection control chip 400, and further connected to the first switching tube 110 through the first output pin OUT1, and specifically may be connected to the gate of the first switching tube 110.
The first terminal conducts the second terminal and the third terminal according to the power-on information, so that the potential of the third terminal is the same as the ground. Meanwhile, the first switch tube 110 is an N-type fet, which receives a low level from the third terminal of the third switch tube 420 and turns off the third switch tube 420, so that the third switch tube 420 is conveniently turned on and off.
As an example, the third switching transistor 420 may be an N-type switching MOS transistor, a P-type switching MOS transistor, a switching triode, or the like.
Further, in this embodiment, the driving switching circuit may further include a first current limiting resistor 510. Referring to fig. 3, the first current limiting resistor 510 may be a resistor R4. The first current limiting resistor 510 is connected between the third terminal of the third switch tube 420 and the first switch tube 110. Specifically, two ends of the first current limiting resistor 510 may be respectively connected to the first output pin OUT1 of the power-on detection control chip 400 and the input pin VDD of the first driving chip 100.
At this time, the first current limiting resistor 510 can play a role of current limiting and voltage dividing, so as to prevent the first switching tube 110 from being damaged by the high level provided by the input ac power conversion chip 300 for turning on the first switching tube 110 when the third switching tube 420 is turned off.
At this time, the resistance of the first current limiting resistor 510 is also controlled within a certain range, so that when the third switching tube 420 is turned on, a low level can be input to the first switching tube 110 to turn off the first switching tube.
Alternatively, the driving switching circuit may not be provided with the first current limiting resistor 510, and the embodiment is not limited thereto.
In one embodiment, the second switch 210 is an N-type fet. Meanwhile, the fourth switching tube 430 includes a fourth end, a fifth end and a sixth end.
The fourth terminal of the fourth switching tube 430 is connected to the detection control device 410, and further receives the regulated voltage provided by the detection control device 410. The fifth terminal of the fourth switching tube 430 is grounded. Specifically, the fifth terminal may be connected to the ground pin GND of the power-on detection control chip 400. The sixth terminal of the fourth switching tube 430 is connected to the second switching tube 210. Specifically, the sixth terminal may be connected to the second output pin OUT2 of the power-on detection control chip 400, and further connected to the second switching tube 210 through the second output pin OUT2, and specifically connected to the gate of the second switching tube 210.
The fourth terminal conducts the fifth terminal and the sixth terminal according to the power-on information, so that the sixth terminal is also at the same potential as the ground. Meanwhile, the second switch tube 210 is an N-type fet, which receives the low level from the sixth terminal of the fourth switch tube 430 and turns off the low level, so that the fourth switch tube 430 is turned off when the fourth switch tube 430 is turned on.
As an example, the fourth switching transistor 430 may be an N-type switching MOS transistor, a P-type switching MOS transistor, a switching triode, or the like.
Further, in this embodiment, the driving switching circuit may further include a second current limiting resistor 520. Referring to fig. 3, the second current limiting resistor 520 may be a resistor R5. The second current limiting resistor 520 is connected between the sixth terminal of the fourth switching tube 430 and the second switching tube 210.
Specifically, two ends of the second current limiting resistor 520 may be respectively connected to the second output pin OUT2 of the power-on detection control chip 400 and the input pin VDD of the second driving chip 200.
At this time, the second current limiting resistor 520 may play a role of current limiting and voltage dividing, so as to prevent the second switching tube 210 from being damaged by the high level provided by the input ac power conversion chip 300 for the second switching tube 210 to turn on when the fourth switching tube 430 is turned off.
At this time, the resistance of the second current limiting resistor 520 is also controlled within a certain range, so that when the fourth switching transistor 430 is turned on, a low level may be input to the second switching transistor 210 to turn off the second switching transistor.
Alternatively, the driving switching circuit may not be provided with the second current limiting resistor 520, which is not limited in this embodiment.
In one embodiment, the driving switching circuit further includes an energy storage device 600 connected to the power-on detection control chip 400. When the detection control device 410 detects that the energization information of the power supply line is not energized, the energy storage device 600 supplies power to the energization detection control chip 400.
At this time, when the power supply line stops supplying power, the energy storage device 600 can effectively ensure that the logic circuit in the power-on detection control chip 400 can still normally operate. Therefore, when the power supply line stops supplying power for a period of time and is powered on again, the detection control device 410 can timely detect the relevant power-on information, and further timely and effectively control the third switch tube 420 and the fourth switch tube 430, so as to timely control the output of each load.
As an example, the energy storage device 600 may be a capacitor. Referring to fig. 3, the energy storage device 600 may be a capacitor C8.
Specifically, the power-on detection control chip 400 may include a first input pin VCC, a second input pin VDD, and a unidirectional conductive device (not shown).
As described in the previous embodiments, the first input pin VCC is connected to the sensing control device 410, so that the current in the power supply line can be introduced into the sensing control device 410 through the first input pin VCC.
The second input pin VDD is connected to the energy storage device 600, so that when the power supply line stops supplying power, the energy storage device 600 can supply power to the logic circuit in the power-on detection control chip 400 through the second input pin VDD.
The unidirectional conducting device may be a diode or the like, which is connected between the first input pin VCC and the second input pin VDD. When the power supply line supplies power, the unidirectional conductive device is turned on, so that current in the power supply line sequentially flows to the energy storage device 600 (capacitor C8) through the first input pin VCC, the unidirectional conductive device and the second input pin VDD, and the energy storage device 600 (capacitor C8) is charged. When the power supply line is powered off, the unidirectional conductive device is turned off, and the energy storage device 600 only discharges to the second input pin VDD to supply power to the logic circuit in the power-on detection control chip 400.
In one embodiment, the driving switching circuit further includes a first voltage stabilization device 710. The first voltage stabilizer 710 has one end connected to the first switch tube 110 (specifically, the first switch tube 110 may be connected by connecting to the input pin VDD of the first driver chip 100), and the other end connected to ground, so as to stabilize the supply voltage of the first driver chip 100.
And/or, the driving switching circuit further includes a second voltage stabilizing device 720. One end of the second voltage stabilizer 720 is connected to the second switching tube 210 (specifically, the second switching tube 210 may be connected by connecting to the input pin VDD of the second driver chip 200), and the other end is grounded, so that the supply voltage of the second driver chip 200 is maintained stable.
In the embodiment of the present application, the driving switching circuit may further include a first pull-up resistor 810 and a second pull-up resistor 820.
Referring to fig. 3, the first pull-up resistor 810 may include a resistor R7 and a resistor R8, which are connected between the ac power converting chip 300 and the first switch tube 110, so that the first switch tube 110 obtains a required voltage. Specifically, two ends of the first pull-up resistor 810 may be respectively connected to the ac power converting chip 300 and the input pin VDD of the first driving chip 100.
The second pull-up resistor 820 may include a resistor R11 and a resistor R12, which are connected between the ac power converting chip 300 and the second switching tube 210, so that the second switching tube 210 can obtain the required voltage. Specifically, two ends of the second pull-up resistor 820 may be respectively connected to the ac power converting chip 300 and the input pin VDD of the second driving chip 200.
Further, as explained in the foregoing embodiment, the power supply switch S1 may be provided between the live wire end of the power supply line and the energization detecting control chip 400. Further, a voltage reduction resistor (for example, a resistor R1 and a resistor R2 in the figure) may be disposed between the power supply switch S1 and the first input pin VCC of the power-on detection control chip 400. A fuse resistor (e.g., FR1 in the figure) may be further disposed between the power supply switch S1 and the voltage-dropping resistor, and a pull-down resistor R3 may be further disposed to protect the power-on detection control chip 400, wherein one end of the pull-down resistor R is connected to the first input pin VCC and the other end of the pull-down resistor R is grounded.
In one embodiment, a lighting device is provided, which includes a first light source module, a second light source module, and the driving switching circuit in the above embodiments. The first driving chip 100 of the driving switching circuit is connected to the first light source module, i.e. the first light source module is used as a first load. The second driving chip 200 of the driving switching circuit is connected to the second light source module, i.e. the second light source module is used as a second load.
In this embodiment, the driving switching circuit is suitable for the lighting device, and the first load and the second load are both light source modules. Of course, the present application is not limited thereto, and the driving switching circuit may be applied to other devices that need to switch the load output.
In the description herein, references to the description of "one embodiment" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A drive switching circuit, comprising:
the first driving chip comprises a first switching tube and is used for driving a first load when the first switching tube is conducted;
the second driving chip comprises a second switching tube and is used for driving a second load when the second switching tube is conducted;
the alternating current conversion chip is connected with the first switching tube and the second switching tube and used for converting alternating current to supply power to the first switching tube and the second switching tube;
the power-on detection control chip comprises a detection control device, a third switch tube and a fourth switch tube; the detection control device is connected with the third switching tube and the fourth switching tube, and is used for detecting the electrifying information of a power supply line and switching on or off the third switching tube and the fourth switching tube according to the electrifying information; the third switching tube is connected with the first switching tube and used for turning off the first switching tube when the third switching tube is conducted; and the fourth switching tube is connected with the second switching tube and used for switching off the second switching tube when the fourth switching tube is switched on.
2. The drive switching circuit according to claim 1,
the first switch tube is an N-type field effect tube, the third switch tube comprises a first end, a second end and a third end, the first end is connected with the detection control device, the second end is grounded, the third end is connected with the first switch tube, and the first end conducts the second end and the third end according to the electrifying information;
and/or the presence of a gas in the gas,
the second switch tube is an N-type field effect tube, the fourth switch tube comprises a fourth end, a fifth end and a sixth end, the fourth end is connected with the detection control device, the fifth end is grounded, the sixth end is connected with the second switch tube, and the fourth end is connected with the fifth end and the sixth end according to the electrifying information.
3. The driving switching circuit according to claim 2, wherein the third switching transistor is an N-type switching MOS transistor, a P-type switching MOS transistor, or a switching triode;
and/or the presence of a gas in the gas,
the fourth switch tube is an N-type switch MOS tube or a P-type switch MOS tube or a switch triode.
4. The drive switching circuit according to claim 2,
the driving switching circuit further comprises a first current limiting resistor, and the first current limiting resistor is connected between the third end of the third switching tube and the first switching tube;
and/or the presence of a gas in the gas,
the driving switching circuit further comprises a second current limiting resistor, and the second current limiting resistor is connected between the sixth end of the fourth switching tube and the second switching tube.
5. The drive switching circuit according to claim 1, further comprising an energy storage device connected to the power-on detection control chip for supplying power to the power-on detection control chip when the detection control device detects that the power-on information is not powered on.
6. The driving switching circuit according to claim 5, wherein the energy storage device is a capacitor, the power-on detection control chip further comprises a first input pin, a second input pin and a unidirectional conductive device, the first input pin is connected to the detection control device, the second input pin is connected to the energy storage device, and the unidirectional conductive device is connected between the first input pin and the second input pin.
7. The drive switching circuit according to claim 1,
the driving switching circuit further comprises a first voltage stabilizing device, one end of the first voltage stabilizing device is connected with the first switching tube, and the other end of the first voltage stabilizing device is grounded;
and/or the presence of a gas in the gas,
the driving switching circuit further comprises a second voltage stabilizing device, one end of the second voltage stabilizing device is connected with the second switching tube, and the other end of the second voltage stabilizing device is grounded.
8. The drive switching circuit according to claim 7, wherein the first voltage stabilization device and/or the second voltage stabilization device is a capacitor.
9. The driving switching circuit according to any one of claims 1 to 8, further comprising a first pull-up resistor connected between the ac power conversion chip and the first switching tube, and a second pull-up resistor connected between the ac power conversion chip and the second switching tube.
10. An illumination device, characterized in that, a first light source module, a second light source module and the driving switching circuit of any one of claims 1-9, the first driving chip is connected to the first light source module, and the second driving chip is connected to the second light source module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021551901.7U CN212812103U (en) | 2020-07-30 | 2020-07-30 | Drive switching circuit and lighting device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021551901.7U CN212812103U (en) | 2020-07-30 | 2020-07-30 | Drive switching circuit and lighting device |
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