CN211267165U - Quick reset control circuit of intelligent LED device and LED driving power supply - Google Patents
Quick reset control circuit of intelligent LED device and LED driving power supply Download PDFInfo
- Publication number
- CN211267165U CN211267165U CN201922485200.1U CN201922485200U CN211267165U CN 211267165 U CN211267165 U CN 211267165U CN 201922485200 U CN201922485200 U CN 201922485200U CN 211267165 U CN211267165 U CN 211267165U
- Authority
- CN
- China
- Prior art keywords
- triode
- power supply
- circuit
- transistor
- resistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model relates to a quick reset control circuit and LED drive power supply of intelligence LED device. The input end of an AC-DC conversion circuit in the reset control circuit is connected with an alternating current power supply end, and a first output end and a second output end of the AC-DC conversion circuit are connected with an LED to supply power for the LED. The first output end of the AC-DC conversion circuit is respectively connected with the input end of the voltage detection circuit and the first input end of the switch circuit, the output end of the voltage detection circuit is connected with the second input end of the switch circuit, and the output end of the switch circuit is connected with the power supply end of the MCU. The voltage detection circuit can detect the voltage change of the first output end of the AC-DC conversion circuit, so that the on-off of the switch circuit is controlled, the switch circuit supplies power to the MCU when being switched on, and the switch circuit stops supplying power to the MCU when being switched off. The utility model discloses can reset fast in the short time, avoid long-time the waiting that resets and the difficult shortcoming of control of operation, easy operation, quick reset, success rate height.
Description
Technical Field
The utility model relates to a LED drive power supply field, more specifically say, relate to a quick reset control circuit and LED drive power supply of intelligence LED device.
Background
With the rapid development of internet informatization, in recent years, intelligent LED power supply devices are seen everywhere in production and life. In general, when an LED intelligent control device is initially installed, it needs to be in communication connection with a mobile phone, a tablet, a desktop computer, and other terminal devices, and a single chip microcomputer MCU inside the LED intelligent control device needs to perform initialization on a program, and can perform intelligent operations such as switching and dimming after being successfully connected with the terminal devices.
Sometimes, when an operation fault occurs in a certain LED device, an initial reset operation needs to be performed on an internal single chip microcomputer MCU, or when the LED devices are increased or decreased in the same area, or when a system is upgraded, reset operations need to be performed on each LED device again. General system upgrade or singlechip MCU reset can provide two kinds of reset methods:
1. wireless upgrade and reset are performed through terminal operation.
2. And upgrading and resetting are carried out through a mains switch.
The second mode is an operation method adopted when the first mode is inconvenient to operate or a plurality of LED devices are reset simultaneously (for example, three times of power-on and power-off are defined, and the single-chip microcomputer MCU automatically performs initialization reset after recognizing the reset condition every time the power-on and power-off interval is within 3 seconds). For the second reset mode, the conventional operation is only suitable for the LED load with a relatively low output voltage, and for the LED with a relatively high output voltage, the reset time is generally relatively long, and the interval time between the judgment and the operation reset by the operator subjectively is easy to cause misjudgment and misoperation, so that the reset is unsuccessful, and the re-operation or the multiple reset operations are required.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, a quick reset control circuit and LED drive power supply of intelligence LED device are provided.
The utility model provides a technical scheme that its technical problem adopted is: the quick reset control circuit of the intelligent LED device is constructed and comprises an AC-DC conversion circuit, wherein the input end of the AC-DC conversion circuit is connected with an alternating current power supply end, a first output end and a second output end of the AC-DC conversion circuit are connected with an LED to supply power for the LED, and an electrolytic capacitor CE is connected between the first output end and the second output end of the AC-DC conversion circuit; the device also comprises a voltage detection circuit and a switch circuit;
the first output end of the AC-DC conversion circuit is respectively connected with the input end of the voltage detection circuit and the first input end of the switch circuit, the output end of the voltage detection circuit is connected with the second input end of the switch circuit, the output end of the switch circuit is connected with the power supply end of the MCU, the switch circuit supplies power to the MCU when being switched on, and the switch circuit stops supplying power to the MCU when being switched off;
the voltage detection circuit comprises a triode Q1, a zener diode ZD1, a resistor R1, a resistor R2 and a resistor R3, wherein the cathode of the zener diode ZD1 is connected with the first output end of the AC-DC conversion circuit, the anode of the zener diode ZD1 is connected with the base of the triode Q1 through the resistor R1, and the base of the triode Q1 is grounded through the resistor R3; if the transistor Q1 is a PNP transistor, the emitter of the transistor Q1 is connected to the first output terminal of the AC-DC conversion circuit through the resistor R2, and the emitter of the transistor Q1 is connected to the second input terminal of the switching circuit; if the transistor Q1 is an NPN transistor, the collector of the transistor Q1 is connected to the first output terminal of the AC-DC conversion circuit through the resistor R2, and the collector of the transistor Q1 is connected to the second input terminal of the switching circuit.
Further, in the fast reset control circuit of the intelligent LED device of the present invention, the switching circuit includes a triode Q, a zener diode ZD, and a resistor R, and the triode Q1 is a PNP type triode;
the base electrode of the triode Q is connected with the emitting electrode of the triode Q1, the base electrode of the triode Q is connected with the negative electrode of the zener diode ZD, and the positive electrode of the zener diode ZD is grounded; the collector of the triode Q is connected with the first output end of the AC-DC conversion circuit, and the base of the triode Q is connected with the collector of the triode Q through the resistor R; and the emitting electrode of the triode Q is connected with the power supply end of the MCU.
Further, in the fast reset control circuit of the intelligent LED device of the present invention, the switch circuit includes a transistor Q, a transistor Q2, a zener diode ZD, and a resistor R, and the transistor Q1 and the transistor Q2 are NPN transistors;
the base electrode of the triode Q2 is connected with the collector electrode of the triode Q1, the collector electrode of the triode Q2 is connected with the base electrode of the triode Q, and the emitter electrode of the triode Q2 is grounded; the base electrode of the triode Q is connected with the negative electrode of the voltage stabilizing diode ZD, and the positive electrode of the voltage stabilizing diode ZD is grounded; the collector of the triode Q is connected with the first output end of the AC-DC conversion circuit, and the base of the triode Q is connected with the collector of the triode Q through the resistor R; and the emitting electrode of the triode Q is connected with the power supply end of the MCU.
Further, in the fast reset control circuit of the intelligent LED device of the present invention, the switch circuit includes a dc switch chip, an inductor L, a diode D, and a resistor R4, the transistor Q1 is a PNP type transistor, and the power supply output pin of the dc switch chip has no voltage when the enable pin EN of the dc switch chip receives a low level;
an emitter of the triode Q1 is connected with an enable pin EN of the direct-current switch chip, and the enable pin EN of the direct-current switch chip is grounded through the resistor R4; a power supply input pin of the direct current switch chip is connected with a first output end of the AC-DC conversion circuit, and a power supply output pin of the direct current switch chip is connected with a power supply end of the MCU through the inductor L; the power supply end of the single chip microcomputer MCU is connected with the negative electrode of the diode D, and the positive electrode of the diode D is grounded.
Further, in the fast reset control circuit of the intelligent LED device of the present invention, the switch circuit includes a dc switch chip, an inductor L, a diode D, a resistor R4, and a transistor Q2, wherein the transistor Q1 and the transistor Q2 are NPN transistors, and the power supply output pin of the dc switch chip has no voltage when the enable pin EN of the dc switch chip receives a low level;
the base electrode of the triode Q2 is connected with the collector electrode of the triode Q1, the collector electrode of the triode Q2 is connected with the enable pin EN of the direct current switch chip, and the emitting electrode of the triode Q2 is grounded; the enable pin EN of the direct current switch chip is grounded through the resistor R4; a power supply input pin of the direct current switch chip is connected with a first output end of the AC-DC conversion circuit, and a power supply output pin of the direct current switch chip is connected with a power supply end of the MCU through the inductor L; the power supply end of the single chip microcomputer MCU is connected with the negative electrode of the diode D, and the positive electrode of the diode D is grounded.
Further, in the fast reset control circuit of the intelligent LED device of the present invention, the switch circuit includes a dc switch chip, an inductor L, a diode D, and a resistor R4, the transistor Q1 is a PNP type transistor, and the power supply output pin of the dc switch chip has no voltage when the enable pin EN of the dc switch chip receives a high level;
the collector of the triode Q1 is connected with an enable pin EN of the direct-current switch chip, and the enable pin EN of the direct-current switch chip is grounded through the resistor R4; a power supply input pin of the direct current switch chip is connected with a first output end of the AC-DC conversion circuit, and a power supply output pin of the direct current switch chip is connected with a power supply end of the MCU through the inductor L; the power supply end of the single chip microcomputer MCU is connected with the negative electrode of the diode D, and the positive electrode of the diode D is grounded.
Further, in the fast reset control circuit of the intelligent LED device of the present invention, the switch circuit includes a dc switch chip, an inductor L, a diode D, a resistor R4, and a transistor Q2, wherein the transistor Q1 and the transistor Q2 are NPN transistors, and the power supply output pin of the dc switch chip has no voltage when the enable pin EN of the dc switch chip receives a high level;
the base electrode of the triode Q2 is connected with the collector electrode of the triode Q1, the collector electrode of the triode Q2 is connected with the enable pin EN of the direct current switch chip, and the emitting electrode of the triode Q2 is grounded; the enable pin EN of the direct current switch chip is grounded through the resistor R4; a power supply input pin of the direct current switch chip is connected with a first output end of the AC-DC conversion circuit, and a power supply output pin of the direct current switch chip is connected with a power supply end of the MCU through the inductor L; the power supply end of the single chip microcomputer MCU is connected with the negative electrode of the diode D, and the positive electrode of the diode D is grounded.
Further, intelligence LED device's quick reset control circuit still include electric capacity Ci, AC-DC converting circuit's first output passes through electric capacity Ci ground connection.
Further, intelligence LED device's quick reset control circuit still include electric capacity Co, singlechip MCU's feeder ear passes through electric capacity Co ground connection.
Additionally, the utility model also provides a LED drive power supply, include the quick reset control circuit as above-mentioned intelligent LED device.
Implement the utility model discloses a quick reset control circuit and LED drive power supply of intelligence LED device has following beneficial effect: the utility model discloses can reset fast in the short time, avoid long-time the waiting that resets and the difficult shortcoming of control of operation, easy operation, quick reset, success rate height.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
fig. 1 is a circuit diagram of a fast reset control circuit of an intelligent LED device according to an embodiment;
fig. 2 is a circuit diagram of a fast reset control circuit of an intelligent LED device according to an embodiment;
fig. 3 is a circuit diagram of a fast reset control circuit of an intelligent LED device according to an embodiment;
fig. 4 is a circuit diagram of a fast reset control circuit of an intelligent LED device according to an embodiment.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Examples
Referring to fig. 1, the fast reset control circuit of the intelligent LED device of this embodiment includes an AC-DC conversion circuit, an input terminal of the AC-DC conversion circuit is connected to an AC power supply terminal, a first output terminal and a second output terminal of the AC-DC conversion circuit are connected to an LED for supplying power to the LED, and an electrolytic capacitor CE is connected between the first output terminal and the second output terminal of the AC-DC conversion circuit; the circuit also comprises a voltage detection circuit and a switch circuit. The first output end of the AC-DC conversion circuit is respectively connected with the input end of the voltage detection circuit and the first input end of the switch circuit, the output end of the voltage detection circuit is connected with the second input end of the switch circuit, the output end of the switch circuit is connected with the power supply end of the single chip microcomputer MCU, the power is supplied to the single chip microcomputer MCU when the switch circuit is switched on, and the power is stopped being supplied to the single chip microcomputer MCU when the switch circuit is switched off.
The voltage detection circuit comprises a triode Q1, a zener diode ZD1, a resistor R1, a resistor R2 and a resistor R3, wherein the cathode of the zener diode ZD1 is connected with the first output end of the AC-DC conversion circuit, the anode of the zener diode ZD1 is connected with the base of the triode Q1 through the resistor R1, and the base of the triode Q1 is grounded through the resistor R3; the triode Q1 is a PNP type triode, and the emitter of the triode Q1 is connected to the first output terminal of the AC-DC conversion circuit through the resistor R2, and the emitter of the triode Q1 is connected to the second input terminal of the switching circuit.
The switching circuit comprises a triode Q, a zener diode ZD and a resistor R, and the triode Q1 is a PNP type triode; the base electrode of the triode Q is connected with the emitting electrode of the triode Q1, the base electrode of the triode Q is connected with the negative electrode of the voltage stabilizing diode ZD, and the positive electrode of the voltage stabilizing diode ZD is grounded; the collector of the triode Q is connected with the first output end of the AC-DC conversion circuit, and the base of the triode Q is connected with the collector of the triode Q through a resistor R; and the emitting electrode of the triode Q is connected with the power supply end of the MCU.
The fast reset control circuit of the intelligent LED device of this embodiment further includes a capacitor Ci, and the first output terminal of the AC-DC conversion circuit is grounded through the capacitor Ci.
The quick reset control circuit of the intelligent LED device further comprises a capacitor Co, and the power supply end of the single chip microcomputer MCU is grounded through the capacitor Co.
The working principle of the embodiment is as follows:
when the alternating current at the input end of the AC-DC conversion circuit is normally input, the first output end and the second output end of the AC-DC conversion circuit output normal voltage values, at the moment, the voltage stabilizing diode ZD1 works in a breakdown state, the base electrode of the triode Q1 does not work due to high level, and the point A is controlled to maintain high potential, so that the output end of the switching circuit supplies power normally, namely the emitter electrode of the triode Q supplies power normally, and the single chip microcomputer MCU works normally.
After the alternating current at the input end of the AC-DC conversion circuit is turned off, the output voltage Vo at the first output end of the AC-DC conversion circuit is reduced, when the alternating current is reduced to a small amplitude (the value of the voltage stabilizing diode ZD1 is slightly lower than Vo), the voltage stabilizing diode ZD1 is not broken down, the voltage is equivalently opened, the base electrode of the triode Q1 is at a low level, the voltage at the point A is controlled to be reduced when the triode Q1 is switched on, the triode Q is enabled not to output, namely the emitter of the triode Q is not powered, and the MCU is rapidly powered off.
In the process, the AC INPUT is switched off until the single-chip microcomputer MCU does not work, the whole process does not exceed 3 seconds, therefore, the AC INPUT can be powered on and off for 3 times in a short time, and the single-chip microcomputer MCU executes a reset action after being powered on and off for 3 times in a specified time, so that the reset operation band is quick and convenient.
This embodiment can reset fast in the short time, avoids long-time the wait and the difficult controlled shortcoming of operation that resets, easy operation, fast reset, success rate height.
Examples
Referring to fig. 2, the fast reset control circuit of the intelligent LED device of this embodiment includes an AC-DC conversion circuit, an input terminal of the AC-DC conversion circuit is connected to an AC power supply terminal, a first output terminal and a second output terminal of the AC-DC conversion circuit are connected to an LED for supplying power to the LED, and an electrolytic capacitor CE is connected between the first output terminal and the second output terminal of the AC-DC conversion circuit; the circuit also comprises a voltage detection circuit and a switch circuit. The first output end of the AC-DC conversion circuit is respectively connected with the input end of the voltage detection circuit and the first input end of the switch circuit, the output end of the voltage detection circuit is connected with the second input end of the switch circuit, the output end of the switch circuit is connected with the power supply end of the single chip microcomputer MCU, the power is supplied to the single chip microcomputer MCU when the switch circuit is switched on, and the power is stopped being supplied to the single chip microcomputer MCU when the switch circuit is switched off.
The voltage detection circuit comprises a triode Q1, a zener diode ZD1, a resistor R1, a resistor R2 and a resistor R3, wherein the cathode of the zener diode ZD1 is connected with the first output end of the AC-DC conversion circuit, the anode of the zener diode ZD1 is connected with the base of the triode Q1 through the resistor R1, and the base of the triode Q1 is grounded through the resistor R3; the triode Q1 is an NPN type triode, the collector of the triode Q1 is connected to the first output terminal of the AC-DC conversion circuit through the resistor R2, and the collector of the triode Q1 is connected to the second input terminal of the switching circuit.
The switching circuit comprises a triode Q, a triode Q2, a zener diode ZD and a resistor R, the triode Q1 and the triode Q2 are NPN type triodes, the base electrode of the triode Q2 is connected with the collector electrode of the triode Q1, the collector electrode of the triode Q2 is connected with the base electrode of the triode Q, and the emitter electrode of the triode Q2 is grounded; the base electrode of the triode Q is connected with the negative electrode of the voltage stabilizing diode ZD, and the positive electrode of the voltage stabilizing diode ZD is grounded; the collector of the triode Q is connected with the first output end of the AC-DC conversion circuit, and the base of the triode Q is connected with the collector of the triode Q through a resistor R; and the emitting electrode of the triode Q is connected with the power supply end of the MCU.
The working principle of the embodiment is as follows:
when the alternating current at the input end of the AC-DC conversion circuit is normally input, the first output end and the second output end of the AC-DC conversion circuit output normal voltage value, at the moment, the voltage stabilizing diode ZD1 works in a breakdown state, the triode Q1 and the triode Q2 do not work due to high level, and the point A is controlled to maintain high potential, so that the output end of the switching circuit is normally powered, namely the emitter of the triode Q is normally powered, and the single-chip microcomputer MCU normally works.
After the alternating current at the input end of the AC-DC conversion circuit is turned off, the output voltage Vo at the first output end of the AC-DC conversion circuit is reduced, when the alternating current is reduced to a small amplitude (the value of the voltage stabilizing diode ZD1 is slightly lower than Vo), the voltage stabilizing diode ZD1 is not broken down, the voltage is equivalently opened, the base electrode of the triode Q1 is at a low level, the triode Q1 and the triode Q2 are conducted, the voltage at the point A is controlled to be reduced, the triode Q does not output, namely the emitter of the triode Q is not powered, and the MCU is rapidly powered off.
In the process, the AC INPUT is switched off until the single-chip microcomputer MCU does not work, the whole process does not exceed 3 seconds, therefore, the AC INPUT can be powered on and off for 3 times in a short time, and the single-chip microcomputer MCU executes a reset action after being powered on and off for 3 times in a specified time, so that the reset operation band is quick and convenient.
This embodiment can reset fast in the short time, avoids long-time the wait and the difficult controlled shortcoming of operation that resets, easy operation, fast reset, success rate height.
Examples
Referring to fig. 3, the fast reset control circuit of the intelligent LED device of this embodiment includes an AC-DC conversion circuit, an input terminal of the AC-DC conversion circuit is connected to an AC power supply terminal, a first output terminal and a second output terminal of the AC-DC conversion circuit are connected to an LED for supplying power to the LED, and an electrolytic capacitor CE is connected between the first output terminal and the second output terminal of the AC-DC conversion circuit; the circuit also comprises a voltage detection circuit and a switch circuit. The first output end of the AC-DC conversion circuit is respectively connected with the input end of the voltage detection circuit and the first input end of the switch circuit, the output end of the voltage detection circuit is connected with the second input end of the switch circuit, the output end of the switch circuit is connected with the power supply end of the single chip microcomputer MCU, the power is supplied to the single chip microcomputer MCU when the switch circuit is switched on, and the power is stopped being supplied to the single chip microcomputer MCU when the switch circuit is switched off.
The voltage detection circuit comprises a triode Q1, a zener diode ZD1, a resistor R1, a resistor R2 and a resistor R3, wherein the cathode of the zener diode ZD1 is connected with the first output end of the AC-DC conversion circuit, the anode of the zener diode ZD1 is connected with the base of the triode Q1 through the resistor R1, and the base of the triode Q1 is grounded through the resistor R3; the triode Q1 is a PNP type triode, and the emitter of the triode Q1 is connected to the first output terminal of the AC-DC conversion circuit through the resistor R2, and the emitter of the triode Q1 is connected to the second input terminal of the switching circuit.
The switching circuit comprises a direct current switch chip (dc/dc in the figure), an inductor L, a diode D and a resistor R4, wherein a triode Q1 is a PNP type triode, and a power supply output pin of the direct current switch chip has no voltage when an enable pin EN of the direct current switch chip receives low level; an emitter of the triode Q1 is connected with an enable pin EN of the direct-current switch chip, and the enable pin EN of the direct-current switch chip is grounded through a resistor R4; a power supply input pin of the direct current switch chip is connected with a first output end of the AC-DC conversion circuit, and a power supply output pin of the direct current switch chip is connected with a power supply end of the single chip microcomputer MCU through an inductor L; the power supply end of the single chip microcomputer MCU is connected with the negative electrode of the diode D, and the positive electrode of the diode D is grounded.
The fast reset control circuit of the intelligent LED device of this embodiment further includes a capacitor Ci, and the first output terminal of the AC-DC conversion circuit is grounded through the capacitor Ci.
The quick reset control circuit of the intelligent LED device further comprises a capacitor Co, and the power supply end of the single chip microcomputer MCU is grounded through the capacitor Co.
The working principle of the embodiment is as follows:
when the alternating current at the input end of the AC-DC conversion circuit is normally input, the first output end and the second output end of the AC-DC conversion circuit output normal voltage values, at the moment, the voltage stabilizing diode ZD1 works in a breakdown state, the triode Q1 does not work due to high level, and the point A is controlled to maintain high level, so that the enable pin EN of the direct current switch chip is high level, the power supply output pin of the direct current switch chip outputs normal voltage when the enable pin EN of the direct current switch chip receives the high level, and the single chip microcomputer MCU normally works.
After the alternating current at the input end of the AC-DC conversion circuit is turned off, the output voltage Vo at the first output end of the AC-DC conversion circuit is reduced, when the alternating current is reduced to a small amplitude (the value of the voltage stabilizing diode ZD1 is slightly lower than Vo), the voltage stabilizing diode ZD1 is not broken down, the voltage is equivalently opened, the base electrode of the triode Q1 is at a low level, the triode Q1 is switched on at the moment, the voltage at the point A is controlled to be pulled down, the power supply output pin of the direct current switch chip is free of voltage when the enabling pin EN of the direct current switch chip receives the low level, and the single chip microcomputer MCU is rapidly powered off.
In the process, the AC INPUT is switched off until the single-chip microcomputer MCU does not work, the whole process does not exceed 3 seconds, therefore, the AC INPUT can be powered on and off for 3 times in a short time, and the single-chip microcomputer MCU executes a reset action after being powered on and off for 3 times in a specified time, so that the reset operation band is quick and convenient.
This embodiment can reset fast in the short time, avoids long-time the wait and the difficult controlled shortcoming of operation that resets, easy operation, fast reset, success rate height.
Examples
The difference between this embodiment and the previous embodiment is that the switching circuit in the fast reset control circuit of the intelligent LED device of this embodiment includes a dc switch chip, an inductor L, a diode D, a resistor R4, and a transistor Q2, where the transistor Q1 and the transistor Q2 are NPN transistors, and the power supply output pin of the dc switch chip has no voltage when the enable pin EN of the dc switch chip receives a low level. The base electrode of the triode Q2 is connected with the collector electrode of the triode Q1, the collector electrode of the triode Q2 is connected with an enabling pin EN of the direct-current switch chip, and the emitting electrode of the triode Q2 is grounded; an enable pin EN of the direct current switch chip is grounded through a resistor R4; a power supply input pin of the direct current switch chip is connected with a first output end of the AC-DC conversion circuit, and a power supply output pin of the direct current switch chip is connected with a power supply end of the single chip microcomputer MCU through an inductor L; the power supply end of the single chip microcomputer MCU is connected with the negative electrode of the diode D, and the positive electrode of the diode D is grounded.
In this embodiment, the transistor Q1 and the transistor Q2 are NPN transistors, the combination of the transistor Q1 and the transistor Q2 can realize the function of the transistor Q1 in the previous embodiment, and other working principles can be referred to the previous embodiment.
Examples
Referring to fig. 4, the fast reset control circuit of the intelligent LED device of this embodiment includes an AC-DC conversion circuit, an input terminal of the AC-DC conversion circuit is connected to an AC power supply terminal, a first output terminal and a second output terminal of the AC-DC conversion circuit are connected to an LED for supplying power to the LED, and an electrolytic capacitor CE is connected between the first output terminal and the second output terminal of the AC-DC conversion circuit; the circuit also comprises a voltage detection circuit and a switch circuit. The first output end of the AC-DC conversion circuit is respectively connected with the input end of the voltage detection circuit and the first input end of the switch circuit, the output end of the voltage detection circuit is connected with the second input end of the switch circuit, the output end of the switch circuit is connected with the power supply end of the single chip microcomputer MCU, the power is supplied to the single chip microcomputer MCU when the switch circuit is switched on, and the power is stopped being supplied to the single chip microcomputer MCU when the switch circuit is switched off.
The voltage detection circuit comprises a triode Q1, a zener diode ZD1, a resistor R1, a resistor R2 and a resistor R3, wherein the cathode of the zener diode ZD1 is connected with the first output end of the AC-DC conversion circuit, the anode of the zener diode ZD1 is connected with the base of the triode Q1 through the resistor R1, and the base of the triode Q1 is grounded through the resistor R3; the triode Q1 is a PNP type triode, and the emitter of the triode Q1 is connected to the first output terminal of the AC-DC conversion circuit through the resistor R2, and the emitter of the triode Q1 is connected to the second input terminal of the switching circuit.
The switching circuit comprises a direct current switch chip, an inductor L, a diode D and a resistor R4, the triode Q1 is a PNP type triode, and a power supply output pin of the direct current switch chip has no voltage when an enabling pin EN of the direct current switch chip receives a high level. The collector of the triode Q1 is connected with an enable pin EN of the direct-current switch chip, and the enable pin EN of the direct-current switch chip is grounded through a resistor R4; a power supply input pin of the direct current switch chip is connected with a first output end of the AC-DC conversion circuit, and a power supply output pin of the direct current switch chip is connected with a power supply end of the single chip microcomputer MCU through an inductor L; the power supply end of the single chip microcomputer MCU is connected with the negative electrode of the diode D, and the positive electrode of the diode D is grounded.
The working principle of the embodiment is as follows:
when the alternating current at the input end of the AC-DC conversion circuit is normally input, the first output end and the second output end of the AC-DC conversion circuit output normal voltage, at the moment, the voltage stabilizing diode ZD1 works in a breakdown state, the triode Q1 does not work due to high level, and the point A is controlled to maintain low level, so that the enable pin EN of the direct current switch chip is low level, the power supply output pin of the direct current switch chip outputs normal voltage when the enable pin EN of the direct current switch chip receives low level, and the single chip microcomputer MCU normally works.
After the alternating current at the input end of the AC-DC conversion circuit is turned off, the output voltage Vo at the first output end of the AC-DC conversion circuit is reduced, when the output voltage Vo is reduced to a small amplitude (the value of the voltage stabilizing diode ZD1 is slightly lower than Vo), the voltage stabilizing diode ZD1 is not broken down, the voltage is equivalently opened, the base electrode of the triode Q1 is at a low level, the triode Q1 is switched on at the moment, the voltage at the point A is controlled to be increased, the power supply output pin of the direct current switch chip has no voltage when the enable pin EN of the direct current switch chip receives the high level, and the MCU is rapidly powered off.
In the process, the AC INPUT is switched off until the single-chip microcomputer MCU does not work, the whole process does not exceed 3 seconds, therefore, the AC INPUT can be powered on and off for 3 times in a short time, and the single-chip microcomputer MCU executes a reset action after being powered on and off for 3 times in a specified time, so that the reset operation band is quick and convenient.
This embodiment can reset fast in the short time, avoids long-time the wait and the difficult controlled shortcoming of operation that resets, easy operation, fast reset, success rate height.
Examples
The difference between this embodiment and the previous embodiment is that the switching circuit in the fast reset control circuit of the intelligent LED device of this embodiment includes a dc switch chip, an inductor L, a diode D, a resistor R4, and a transistor Q2, where the transistor Q1 and the transistor Q2 are NPN transistors, and the power supply output pin of the dc switch chip has no voltage when the enable pin EN of the dc switch chip receives a high level. The base electrode of the triode Q2 is connected with the collector electrode of the triode Q1, the collector electrode of the triode Q2 is connected with an enabling pin EN of the direct-current switch chip, and the emitting electrode of the triode Q2 is grounded; an enable pin EN of the direct current switch chip is grounded through a resistor R4; a power supply input pin of the direct current switch chip is connected with a first output end of the AC-DC conversion circuit, and a power supply output pin of the direct current switch chip is connected with a power supply end of the single chip microcomputer MCU through an inductor L; the power supply end of the single chip microcomputer MCU is connected with the negative electrode of the diode D, and the positive electrode of the diode D is grounded.
In this embodiment, the transistor Q1 and the transistor Q2 are NPN transistors, the combination of the transistor Q1 and the transistor Q2 can realize the function of the transistor Q1 in the previous embodiment, and other working principles can be referred to the previous embodiment.
Examples
The LED driving power supply of the present embodiment includes a quick reset control circuit of the intelligent LED device as in the above embodiments.
This embodiment can reset fast in the short time, avoids long-time the wait and the difficult controlled shortcoming of operation that resets, easy operation, fast reset, success rate height.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and implement the present invention accordingly, which can not limit the protection scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.
Claims (10)
1. A quick reset control circuit of an intelligent LED device comprises an AC-DC conversion circuit, wherein the input end of the AC-DC conversion circuit is connected with an alternating current power supply end, a first output end and a second output end of the AC-DC conversion circuit are connected with an LED to supply power for the LED, and an electrolytic capacitor CE is connected between the first output end and the second output end of the AC-DC conversion circuit; the circuit is characterized by also comprising a voltage detection circuit and a switch circuit;
the first output end of the AC-DC conversion circuit is respectively connected with the input end of the voltage detection circuit and the first input end of the switch circuit, the output end of the voltage detection circuit is connected with the second input end of the switch circuit, the output end of the switch circuit is connected with the power supply end of the MCU, the switch circuit supplies power to the MCU when being switched on, and the switch circuit stops supplying power to the MCU when being switched off;
the voltage detection circuit comprises a triode Q1, a zener diode ZD1, a resistor R1, a resistor R2 and a resistor R3, wherein the cathode of the zener diode ZD1 is connected with the first output end of the AC-DC conversion circuit, the anode of the zener diode ZD1 is connected with the base of the triode Q1 through the resistor R1, and the base of the triode Q1 is grounded through the resistor R3; if the transistor Q1 is a PNP transistor, the emitter of the transistor Q1 is connected to the first output terminal of the AC-DC conversion circuit through the resistor R2, and the emitter of the transistor Q1 is connected to the second input terminal of the switching circuit; if the transistor Q1 is an NPN transistor, the collector of the transistor Q1 is connected to the first output terminal of the AC-DC conversion circuit through the resistor R2, and the collector of the transistor Q1 is connected to the second input terminal of the switching circuit.
2. The fast reset control circuit of an intelligent LED device according to claim 1, wherein the switch circuit comprises a transistor Q, a zener diode ZD, and a resistor R, and the transistor Q1 is a PNP-type transistor;
the base electrode of the triode Q is connected with the emitting electrode of the triode Q1, the base electrode of the triode Q is connected with the negative electrode of the zener diode ZD, and the positive electrode of the zener diode ZD is grounded; the collector of the triode Q is connected with the first output end of the AC-DC conversion circuit, and the base of the triode Q is connected with the collector of the triode Q through the resistor R; and the emitting electrode of the triode Q is connected with the power supply end of the MCU.
3. The fast reset control circuit of an intelligent LED device according to claim 1, wherein the switch circuit comprises a transistor Q, a transistor Q2, a zener diode ZD, and a resistor R, and the transistor Q1 and the transistor Q2 are NPN transistors;
the base electrode of the triode Q2 is connected with the collector electrode of the triode Q1, the collector electrode of the triode Q2 is connected with the base electrode of the triode Q, and the emitter electrode of the triode Q2 is grounded; the base electrode of the triode Q is connected with the negative electrode of the voltage stabilizing diode ZD, and the positive electrode of the voltage stabilizing diode ZD is grounded; the collector of the triode Q is connected with the first output end of the AC-DC conversion circuit, and the base of the triode Q is connected with the collector of the triode Q through the resistor R; and the emitting electrode of the triode Q is connected with the power supply end of the MCU.
4. The fast reset control circuit of an intelligent LED device according to claim 1, wherein the switch circuit comprises a dc switch chip, an inductor L, a diode D, and a resistor R4, the transistor Q1 is a PNP transistor, and the power supply output pin of the dc switch chip has no voltage when the enable pin EN of the dc switch chip receives a low level;
an emitter of the triode Q1 is connected with an enable pin EN of the direct-current switch chip, and the enable pin EN of the direct-current switch chip is grounded through the resistor R4; a power supply input pin of the direct current switch chip is connected with a first output end of the AC-DC conversion circuit, and a power supply output pin of the direct current switch chip is connected with a power supply end of the MCU through the inductor L; the power supply end of the single chip microcomputer MCU is connected with the negative electrode of the diode D, and the positive electrode of the diode D is grounded.
5. The fast reset control circuit of an intelligent LED device according to claim 1, wherein the switch circuit comprises a dc switch chip, an inductor L, a diode D, a resistor R4, and a transistor Q2, wherein the transistor Q1 and the transistor Q2 are NPN transistors, and the power supply output pin of the dc switch chip has no voltage when the enable pin EN of the dc switch chip receives a low level;
the base electrode of the triode Q2 is connected with the collector electrode of the triode Q1, the collector electrode of the triode Q2 is connected with the enable pin EN of the direct current switch chip, and the emitting electrode of the triode Q2 is grounded; the enable pin EN of the direct current switch chip is grounded through the resistor R4; a power supply input pin of the direct current switch chip is connected with a first output end of the AC-DC conversion circuit, and a power supply output pin of the direct current switch chip is connected with a power supply end of the MCU through the inductor L; the power supply end of the single chip microcomputer MCU is connected with the negative electrode of the diode D, and the positive electrode of the diode D is grounded.
6. The fast reset control circuit of an intelligent LED device according to claim 1, wherein the switch circuit comprises a dc switch chip, an inductor L, a diode D, and a resistor R4, the transistor Q1 is a PNP transistor, and the power supply output pin of the dc switch chip has no voltage when the enable pin EN of the dc switch chip receives a high level;
the collector of the triode Q1 is connected with an enable pin EN of the direct-current switch chip, and the enable pin EN of the direct-current switch chip is grounded through the resistor R4; a power supply input pin of the direct current switch chip is connected with a first output end of the AC-DC conversion circuit, and a power supply output pin of the direct current switch chip is connected with a power supply end of the MCU through the inductor L; the power supply end of the single chip microcomputer MCU is connected with the negative electrode of the diode D, and the positive electrode of the diode D is grounded.
7. The fast reset control circuit of an intelligent LED device according to claim 1, wherein the switch circuit comprises a dc switch chip, an inductor L, a diode D, a resistor R4, and a transistor Q2, wherein the transistor Q1 and the transistor Q2 are NPN transistors, and the power supply output pin of the dc switch chip has no voltage when an enable pin EN of the dc switch chip receives a high level;
the base electrode of the triode Q2 is connected with the collector electrode of the triode Q1, the collector electrode of the triode Q2 is connected with the enable pin EN of the direct current switch chip, and the emitting electrode of the triode Q2 is grounded; the enable pin EN of the direct current switch chip is grounded through the resistor R4; a power supply input pin of the direct current switch chip is connected with a first output end of the AC-DC conversion circuit, and a power supply output pin of the direct current switch chip is connected with a power supply end of the MCU through the inductor L; the power supply end of the single chip microcomputer MCU is connected with the negative electrode of the diode D, and the positive electrode of the diode D is grounded.
8. The fast reset control circuit of intelligent LED device according to claim 1, further comprising a capacitor Ci, wherein the first output terminal of said AC-DC conversion circuit is grounded through said capacitor Ci.
9. The fast reset control circuit of an intelligent LED device according to claim 1, further comprising a capacitor Co through which the power supply terminal of the MCU is grounded.
10. An LED driving power supply comprising the fast reset control circuit of the intelligent LED apparatus according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922485200.1U CN211267165U (en) | 2019-12-30 | 2019-12-30 | Quick reset control circuit of intelligent LED device and LED driving power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922485200.1U CN211267165U (en) | 2019-12-30 | 2019-12-30 | Quick reset control circuit of intelligent LED device and LED driving power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211267165U true CN211267165U (en) | 2020-08-14 |
Family
ID=71959537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922485200.1U Active CN211267165U (en) | 2019-12-30 | 2019-12-30 | Quick reset control circuit of intelligent LED device and LED driving power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211267165U (en) |
-
2019
- 2019-12-30 CN CN201922485200.1U patent/CN211267165U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210670696U (en) | Detection circuit for flash switch | |
| CN202083915U (en) | Button switch control circuit with zero standby power consumption | |
| CN107196369B (en) | Multi-interface quick charging power supply | |
| CN204334632U (en) | A kind of master-slave communication circuit and air conditioner | |
| CN101604282A (en) | Voltage detection alarm device | |
| CN207398814U (en) | Undervoltage overvoltage protection circuit and power supply system | |
| CN203734663U (en) | Bluetooth matching circuit based on NFC | |
| CN204810138U (en) | Terminal equipment's automation start shooting circuit and terminal equipment | |
| CN211267165U (en) | Quick reset control circuit of intelligent LED device and LED driving power supply | |
| CN104010148A (en) | Power circuit and television | |
| CN103118204B (en) | Mobile terminal of switch machine control and switch machine control method thereof | |
| CN111711436A (en) | Power-off and reset circuit and intelligent central control | |
| CN209844613U (en) | Circuit structure for manually controlling TYPE-C interface to realize Huacheng and Samsung fast charging protocol | |
| CN209358740U (en) | A kind of bluetooth headset reset control circuit | |
| CN203734340U (en) | Compatible type mobile power supply | |
| CN204721326U (en) | A kind of hardware time-delay reset circuit and electronic product | |
| CN212413131U (en) | Power-off and reset circuit and intelligent central control | |
| CN101801128B (en) | Command marker lamp and LED control circuit thereof | |
| CN203933582U (en) | A kind of switching circuit that reduces shutdown electric leakage | |
| CN210225033U (en) | Switching circuit for charging circuit | |
| CN211606889U (en) | Overvoltage protection circuit, constant current drive circuit, drive integrated circuit board and electronic equipment | |
| CN205071002U (en) | Light module power supply circuit and communications facilities | |
| CN108306630B (en) | Switch and reset circuit of power supply | |
| CN108183608B (en) | Boosting circuit | |
| CN203747675U (en) | Output voltage adjustment circuit of power adapter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |