CN114466499A - Multiple protection circuit that dimming circuit involved in intelligence house - Google Patents
Multiple protection circuit that dimming circuit involved in intelligence house Download PDFInfo
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- CN114466499A CN114466499A CN202210179980.0A CN202210179980A CN114466499A CN 114466499 A CN114466499 A CN 114466499A CN 202210179980 A CN202210179980 A CN 202210179980A CN 114466499 A CN114466499 A CN 114466499A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/20—Responsive to malfunctions or to light source life; for protection
- H05B47/24—Circuit arrangements for protecting against overvoltage
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/165—Controlling the light source following a pre-assigned programmed sequence; Logic control [LC]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/175—Controlling the light source by remote control
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/20—Responsive to malfunctions or to light source life; for protection
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/20—Responsive to malfunctions or to light source life; for protection
- H05B47/25—Circuit arrangements for protecting against overcurrent
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/20—Responsive to malfunctions or to light source life; for protection
- H05B47/26—Circuit arrangements for protecting against earth faults
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/20—Responsive to malfunctions or to light source life; for protection
- H05B47/28—Circuit arrangements for protecting against abnormal temperature
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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
- 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
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention relates to the technical field of intelligent home lighting, and discloses various protection circuits related to a dimming circuit in an intelligent home, which comprise a lighting lamp, a power supply voltage module, a power driving module, an overcurrent detection module, a short circuit detection module, a comparison amplification module self-locking circuit module, a reference circuit module, an overvoltage detection module and an overheat detection module, wherein the power supply voltage module provides voltage for the lighting lamp, the power driving module and all the circuit modules in normal working, and the power driving module drives the lighting lamp module to be turned on. This multiple protection circuit that light modulation circuit related to in intelligent house has the high accuracy comparison operational amplifier that millivolt level compares through adopting high-accuracy benchmark chip as reference voltage, and the very fast schottky diode of reaction rate, is suitable for high-power heavy current and adjusts luminance mixing of colors temperature and transfer the color product in, uses and really realizes comprehensive automatic protect function in intelligent house.
Description
Technical Field
The invention relates to the technical field of intelligent home lighting, in particular to various protection circuits related to a dimming circuit in an intelligent home.
Background
In conventional intelligent lighting in an intelligent home, a power semiconductor device is used as a switch without exception, and the switching of a lighting fixture, and adjustment of brightness, gray scale, color temperature, color, and the like are driven by controlling the switching of the power device or changing the duty ratio by an external PWM (or high-low level) signal.
In the home decoration and use process, the output short circuit of the driver with the dimming function is often caused by carelessness of decoration personnel during wiring or wiring, or the short circuit abnormality of the lighting lamp exists; or the power of the selected lamp exceeds the output power of the driving power supply with the dimming function, so that the driving power supply with the dimming function can generate serious heat when working for a short time or a long time, and the driving power supply is damaged due to abnormity, even a fire disaster is caused. Particularly, in a product with a wireless (2.4G or 433M or the like) dimming function, when power or current is high, a power device is burned out instantly when short circuit occurs. This is also a big bottleneck for the industry to damage the power device when the wireless dimming product is short-circuited.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides various protection circuits related to a dimming circuit in an intelligent home, has the advantage of comprehensive automatic protection, and solves the problem that a power device is burnt out due to the short circuit of a high-power dimming lighting driving power supply with a wireless remote control.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a multiple protection circuit that light modulation circuit relates to in intelligence house, includes illumination lamps and lanterns, supply voltage module, power drive module, overflows detection module, short circuit detection module, comparison and amplification module self-locking circuit module, reference circuit module, excessive pressure detection module and overheated detection module, the supply voltage module provides the voltage of normal operating for illumination lamps and lanterns, power drive and whole circuit module.
Preferably, the power driving module drives the lamp module to light, and the over-current detection and short-circuit detection module detects the working current of the driving module at any time.
Preferably, signals detected by the over-current detection module and the short-circuit detection module enter one end of the comparison amplification module and are compared with a reference voltage module at the other end of the comparison amplification module, if a current signal of the driving module is greater than a reference voltage, the comparison amplification module outputs a high level, so that the self-locking circuit works, the power driving is turned off, the self-locking circuit is always in a locked state, and after a fault is removed, the power supply can be restarted to unlock, and normal work is recovered.
Preferably, the thermosensitive element in the overheat detection module is tightly attached to the power device, the surface temperature of the power device is monitored constantly, when the temperature of the power device exceeds a set safe temperature, the overheat detection module outputs a control signal to enable the self-locking circuit to work, the power drive is turned off, the lamp module does not work, after exception is eliminated, the lamp module is electrified again to be unlocked, and normal work is recovered.
Preferably, the voltage detection element in the overvoltage detection module constantly monitors the power supply voltage input to the power drive module and the lamp module, and once the power supply voltage exceeds a set value of the set safety voltage, the overvoltage detection module outputs a control signal to enable the self-locking circuit to work, the power drive is turned off, the lamp module does not work, and after the abnormality is eliminated, the lamp module can be unlocked by being electrified again to restore normal work.
Compared with the prior art, the invention provides various protection circuits related to a dimming circuit in smart home, and the protection circuits have the following beneficial effects:
1. this multiple protection circuit that light modulation circuit related to in intelligent house has the high accuracy comparison operational amplifier that millivolt level compares through adopting high-accuracy benchmark chip as reference voltage, and the very fast schottky diode of reaction rate, is suitable for high-power heavy current and adjusts luminance mixing of colors temperature and transfer the color product in, uses and really realizes comprehensive automatic protect function in intelligent house.
2. This multiple protection circuit that dimming circuit related to in intelligent house through setting up overcurrent detection module, short circuit detection module, excessive pressure detection module and overheated detection module, this circuit has in the application of adjusting luminance, mixing of colors temperature, mixing of colors color product at high-power heavy current, has very advantage as multiple protection, damages power device when preventing the short circuit of wireless dimming product.
Drawings
Fig. 1 is a block diagram of various protection circuits involved in the dimming circuit of the present invention;
fig. 2 is a circuit diagram of various protection circuits related to the dimming circuit of the present invention.
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.
Referring to fig. 1-2, a plurality of protection circuits related to a dimming circuit in an intelligent home comprises a lighting fixture, a power supply voltage module, a power driving module, an over-current detection module, a short-circuit detection module, a comparison amplification module self-locking circuit module, a reference circuit module, an over-voltage detection module and an over-temperature detection module, wherein the power supply voltage module provides a voltage for the lighting fixture, the power driving module and the whole circuit module during normal operation, the power driving module drives the lighting fixture module to light, the over-current detection module and the short-circuit detection module detect the working current of the driving module at any time, signals detected by the over-current detection module and the short-circuit detection module enter one end of the comparison amplification module and are compared with the reference voltage module at the other end of the comparison amplification module, if the current signal of the driving module is greater than the reference voltage, the comparison amplification module outputs a high level, the self-locking circuit works, the power drive is turned off and always in a locking state, after a fault is removed, the self-locking circuit can be unlocked by electrifying again and can restore normal work, the thermosensitive element in the overheat detection module is tightly attached to the power device to monitor the surface temperature of the power device constantly, when the temperature of the power device exceeds a set safe temperature, the overheat detection module outputs a control signal to enable the self-locking circuit to work, the power drive is turned off, the lamp module does not work, after the abnormity is eliminated, the power device can be unlocked by electrifying again and can restore normal work, the voltage detection element in the overvoltage detection module constantly monitors the power supply voltage input to the power drive module and the lamp module, once the power supply voltage exceeds a set value of the set safe voltage, the overvoltage detection module outputs a control signal to enable the self-locking circuit to work, the power drive is turned off, the lamp module does not work, and after the abnormity is eliminated, and the power supply can be powered on again to unlock, and the normal work is recovered.
When the voltage regulator is used, the VDD voltage is subjected to high-frequency and low-frequency filtering and impurity removal through the C1C 2 and then enters the reference chip U2 and the comparison amplification chip U1, so that misoperation of a line is avoided; the PWM signal can be generated by a touch chip, a hand scanning induction and processing chip, a 2.4G wireless processing chip, a Wi-Fi or Bluetooth processing chip, a voice processing chip and the like; the lighting lamp is connected in series between the VDD power supply voltage and the power switch device M1 through a connector, and the power switch device M1 is controlled by an external PWM signal, so that the switching and dimming of the lamp can be realized. If one or two additional circuits are added, the functions of color mixing and color mixing of the lamp can be realized.
The VDD voltage is connected to the U2 through a resistor R14, forms a precise reference voltage of 2.5V with the connection point of a resistor R9, is divided into millivolt-level fixed voltage through a resistor R8 and a resistor R9, and enters the reverse input end of the U1. The power switch device M1 drives the grid of M1 through R13D 2 under the control of the high level of an external PWM signal, M1 is conducted, the drain of VDD-LED + -LED-M1 is connected with the source of M1 and the ground of R11, the lamp is lightened, and the product works normally. A resistor R11 connected below the source of M1 converts the current flowing through itself into a voltage across resistor R10 and into the positive output of U1. In normal operation, U1 always outputs low level, D1 is cut off because no forward voltage is obtained, and the following circuits do not work. If the carried lamp is short-circuited or the CN1 port or the LED + LED-connecting line is short-circuited, the current on the R11 is rapidly increased, the detection voltage reflected on the R11 is rapidly increased, the detection voltage enters the forward input end of the U1 through the R10, once the voltage of the reverse input end is exceeded, the U1 comparator is reversed, the U1 outputs high level, the D1 is conducted in the forward direction, the T3 is also conducted, the connecting point of the base of the T1 and the R5R 6 is changed into low level, and the T1 is conducted. The VDD voltage is limited by an emitter-collector of the T1 through a resistor R3, so that the T2 is positively biased to be conducted, and as a result of conduction, the T1 is always in a conducting state through the R5 in one path, and the T2 is also always in a conducting state, so that a self-locking circuit is formed; the other pulls the gate of M1 to ground, M1 turns off. The lighting fixture stops working, thereby realizing short-circuit protection.
ZD1 is an overvoltage monitoring component, and due to abnormality of power supply voltage, once the power supply voltage exceeds ZD1 turn-on voltage, ZD1 is conducted, VDD is added to the base of T2 through ZD 1R 2 current limiting, T2 obtains positive bias voltage, so that T2 is positively biased and conducted, and as a result of conduction, one path of the power supply voltage enables T1 to be always in a conducting state through R5, and T2 is also always in a conducting state, so that a self-locking circuit is formed; the other pulls the gate of M1 to ground, M1 turns off. The lighting fixture stops working, thereby realizing overvoltage protection.
RT1 is the components and parts of temperature monitoring, and the components and parts of temperature detection are negative temperature coefficient thermistor, and the resistance is big for low temperature resistance, and the temperature is high, and resistance can diminish. By utilizing the principle, the thermistor is tightly attached to the surface of the power device M1, the temperature change of the power device is detected at any time, once the abnormal temperature of the power device rises to exceed the set normal temperature value, the voltage division value between the RT1 and the R1 becomes larger and exceeds the opening voltage value of the T2, VDD is added to the base of the T2 in a current limiting mode through the RT 1R 2, the T2 is conducted due to the fact that positive bias voltage is obtained, and as a result of conduction, the T1 is always in a conducting state through the R5, so that the T2 is also always in a conducting state to form a self-locking circuit; the other pulls the gate of M1 to ground, M1 turns off. The lighting fixture stops working, thereby realizing overheat protection.
In the circuit, D1 is a Schottky diode, the switching speed is very high, and the response speed of the protection circuit is higher; d2 quickly drains charge for the gate of M1 when PWM is off; the U1 has high-precision comparison operational amplifier with millivolt level comparison, and the resistance value of the resistance of the detection current can be selected to be smaller, the loss is less, and the efficiency is high. Therefore, the circuit has the advantages of multiple protection in the application of high-current and high-power products with dimming, color temperature regulation and color regulation.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a multiple protection circuit that dimming circuit involved in intelligence house, includes illumination lamps and lanterns, supply voltage module, power drive module, overflows detection module, short circuit detection module, comparison and amplification module self-locking circuit module, reference circuit module, excessive pressure detection module and overheated detection module, its characterized in that: the power supply voltage module provides voltage for the lighting lamp, the power driver and the whole circuit module during normal operation.
2. The intelligent household dimming circuit comprises a plurality of protection circuits according to claim 1, and is characterized in that: the power driving module drives the lamp module to light, and the overcurrent detection and short circuit detection module detects the working current of the driving module at any time.
3. The multiple protection circuits that light modulation circuit involved in intelligence house of claim 1 characterized in that: and signals detected by the over-current detection module and the short-circuit detection module enter one end of the comparison amplification module and are compared with a reference voltage module at the other end of the comparison amplification module.
4. The multiple protection circuits that light modulation circuit involved in intelligence house of claim 1 characterized in that: and a thermosensitive element in the overheating detection module is tightly attached to the power device, and the surface temperature of the power device is monitored at any time.
5. The multiple protection circuits that light modulation circuit involved in intelligence house of claim 1 characterized in that: and a voltage detection element in the overvoltage detection module monitors the power supply voltage input to the power driving module and the lamp module at any time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210179980.0A CN114466499A (en) | 2022-02-25 | 2022-02-25 | Multiple protection circuit that dimming circuit involved in intelligence house |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210179980.0A CN114466499A (en) | 2022-02-25 | 2022-02-25 | Multiple protection circuit that dimming circuit involved in intelligence house |
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| Publication Number | Publication Date |
|---|---|
| CN114466499A true CN114466499A (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210179980.0A Pending CN114466499A (en) | 2022-02-25 | 2022-02-25 | Multiple protection circuit that dimming circuit involved in intelligence house |
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| CN (1) | CN114466499A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116406065A (en) * | 2023-06-06 | 2023-07-07 | 厦门普为光电科技有限公司 | Lighting device with restorable overcurrent protection function |
| CN117460122A (en) * | 2023-12-21 | 2024-01-26 | 厦门普为光电科技有限公司 | Lighting device with fault detection and self-locking control functions |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916547A (en) * | 2010-07-14 | 2010-12-15 | 成都芯源系统有限公司 | Driver for driving a plurality of light emitting elements and display device |
| CN102842893A (en) * | 2012-08-31 | 2012-12-26 | 厦门华侨电子股份有限公司 | Short-circuit protection and control circuit for LED (Lighnt emitting Diode) strip lamp |
| US20160286620A1 (en) * | 2013-12-17 | 2016-09-29 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Over-voltage and over-current protection circuits and electronic devices |
| CN113056063A (en) * | 2021-03-31 | 2021-06-29 | 黄山市瑞兴汽车电子有限公司 | High-precision and high-reliability LED car lamp driving circuit |
| CN113991603A (en) * | 2021-11-10 | 2022-01-28 | 深圳市华浩德电子有限公司 | Short-circuit protection circuit and lighting device |
-
2022
- 2022-02-25 CN CN202210179980.0A patent/CN114466499A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916547A (en) * | 2010-07-14 | 2010-12-15 | 成都芯源系统有限公司 | Driver for driving a plurality of light emitting elements and display device |
| CN102842893A (en) * | 2012-08-31 | 2012-12-26 | 厦门华侨电子股份有限公司 | Short-circuit protection and control circuit for LED (Lighnt emitting Diode) strip lamp |
| US20160286620A1 (en) * | 2013-12-17 | 2016-09-29 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Over-voltage and over-current protection circuits and electronic devices |
| CN113056063A (en) * | 2021-03-31 | 2021-06-29 | 黄山市瑞兴汽车电子有限公司 | High-precision and high-reliability LED car lamp driving circuit |
| CN113991603A (en) * | 2021-11-10 | 2022-01-28 | 深圳市华浩德电子有限公司 | Short-circuit protection circuit and lighting device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116406065A (en) * | 2023-06-06 | 2023-07-07 | 厦门普为光电科技有限公司 | Lighting device with restorable overcurrent protection function |
| CN116406065B (en) * | 2023-06-06 | 2023-10-17 | 厦门普为光电科技有限公司 | Lighting device with restorable overcurrent protection function |
| CN117460122A (en) * | 2023-12-21 | 2024-01-26 | 厦门普为光电科技有限公司 | Lighting device with fault detection and self-locking control functions |
| CN117460122B (en) * | 2023-12-21 | 2024-04-30 | 厦门普为光电科技有限公司 | Lighting device with fault detection and self-locking control functions |
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