Emergency lighting and common lighting two-in-one down lamp power supply box control circuit

Abstract

The utility model discloses an emergency lighting and common lighting two-in-one down lamp power supply box control circuit which comprises a battery, a logic input module and a light-emitting element which are electrically connected with a main control module. Wherein the logic input module is connected with the mains supply and used for judging whether input voltage meets a numerical value or not, and if yes, a first control signal is generated; if not, generating a second control signal; the main control module responds to the first control signal to control the light-emitting element to work according to a first preset power, or responds to the second control signal, and the light-emitting element takes the battery as a driving voltage source and works according to a second preset power; whether the voltage of the mains supply exists or not is judged through the logic input module, when power supply of the mains supply is normal, the main control module controls the light-emitting element to work according to 100% power, and when the mains supply is powered off, the battery is arranged in a matched mode, so that power driving supply to the lamp tube is achieved. The main control module controls the light-emitting element to work according to the power of 30%-50% so that emergency lighting can be achieved.

Description

Technical Field

[0001] The utility model relates to the field of lighting circuits, in particular to a control circuit for a power supply box of a downlight that combines emergency lighting and general lighting. Background Art

[0002] An LED lamp tube, that is, a light-emitting diode lamp tube, is a lighting device that uses light-emitting diodes (LEDs) as a light source. Compared with traditional fluorescent lamp tubes, LED lamp tubes have many advantages, including higher energy efficiency, longer service life, faster response time, and lower maintenance costs.

[0003] The existing functional circuit carried by an LED lamp tube is only one, that is, using the mains voltage as the power supply to make the LED components emit light for illumination; it is found in actual use that once a power outage occurs, the LED lamp tube cannot be used emergently. It can be seen that the circuit function carried by the LED lamp in the prior art is relatively single, and the user experience is relatively inconvenient. Therefore, a more reasonable solution is urgently needed to solve the above-mentioned technical problems. Summary of the Utility Model

[0004] Aiming at the technical problem that the existing lamp tube circuit in the prior art cannot realize the emergency lighting function and is relatively single, the utility model provides a solution.

[0005] To achieve the above object, the utility model provides a control circuit for a power supply box of a downlight that combines emergency lighting and general lighting, including:

[0006] A battery;

[0007] A logic input module, connected to the mains, for judging whether the input voltage meets the value. If so, a first control signal is generated; if not, a second control signal is generated;

[0008] A main control module, the main control module responds to the first control signal to control the light-emitting element to work at a first preset power; or,

[0009] Responds to the second control signal, and the light-emitting element uses the battery as a driving voltage source and works at a second preset power.

[0010] As an improved scheme of the present application, it further includes a charging module for charging the battery. The input end of the charging module is connected to the mains, and the output end is connected to the battery.

[0011] As an improved solution of the present application, the charging module includes a first rectifier bridge, a first transformer, a first resistor, a second resistor and a first triode. The input end of the first rectifier bridge is connected to the mains power supply, and the output end is connected to the first transformer. The battery is connected to the end of the first transformer away from the first rectifier bridge.

[0012] Among them, the collector of the first triode is coupled to the first connection point between the first transformer and the battery. The emitter of the first triode is grounded, and the base is coupled to the first resistor and the second resistor connected in parallel. The main control module includes a main control chip, and the EN_CH pin of the main control chip is coupled to the second connection point between the first connection point and the battery.

[0013] As an improved solution of the present application, it further includes a boost chip. The control enable pin of the boost chip is connected to the battery. The supplementary pin and the input pin of the boost chip are jointly coupled to the DC-DC PWM enable pin of the main control chip.

[0014] As an improved solution of the present application, the logic input module includes a second rectifier bridge, a second transformer and a voltage regulator chip. The input end of the second rectifier bridge is connected to the mains power supply, and the output end is coupled to the first transformer coil of the second transformer. The voltage regulator chip is coupled to the second transformer coil of the second transformer. The third transformer coil of the second transformer is arranged opposite to the first transformer coil and is connected to the first PWM pin and the second PWM pin of the main control chip.

[0015] As an improved solution of the present application, a first MOS tube and a second MOS tube are further provided between the third transformer coil and the main control chip. The drain of the first MOS tube is coupled to the first electrode, the gate is coupled to the first PWM pin of the main control chip, and the source is coupled to the output end of the third transformer coil. The drain of the second MOS tube is coupled to the second electrode, the gate is coupled to the second PWM pin of the main control chip, and the source is coupled to the output end of the third transformer coil.

[0016] As an improved solution of the present application, it further includes a first optical relay and a second optical relay. The input ends of the first optical relay are jointly coupled with MCU VDD and a first reactor, and the output ends are coupled to the ground and are simultaneously connected to the first enable pin of the main control chip. The input ends of the second optical relay are jointly coupled with MCU VDD and a second reactor, and the output ends are coupled to the ground and are simultaneously connected to the second enable pin of the main control chip.

[0017] As an improved solution of the present application, the main control module is further configured to collect whether the voltage of the battery is lower than a threshold value. If so, it controls the battery to be electrically disconnected from the light-emitting element.

[0018] As an improved solution of the present application, it further includes a second triode and a third MOS transistor. The base of the second triode is coupled to the voltage detection pin of the main control chip, the emitter is coupled to SGND, and the collector is connected to the gate of the third MOS transistor. The source of the third MOS transistor is connected to BAT+.

[0019] As an improved solution of the present application, the main control mode is further coupled with a wall switch wall_sw, and the wall switch wall_sw is used to control the turn-on and turn-off of the lighting unit when the mains voltage is detected.

[0020] The beneficial effects of the present utility model are as follows: Compared with the prior art, the present utility model provides a control circuit for a downlight power supply box that combines emergency lighting and general lighting, including a battery, a logic input module, and a lighting element electrically connected to the main control module; wherein, the logic input module is connected to the mains power supply and is used to judge whether the input voltage conforms to a value. If so, a first control signal is generated; if not, a second control signal is generated; the main control module responds to the first control signal to control the lighting element to work according to a first preset power, or responds to the second control signal, and the lighting element uses the battery as the driving voltage source and works according to a second preset power; by using the logic input module to judge whether there is mains voltage, when the mains power supply is normal, the main control module controls the lighting element to work at 100% power. When the mains power is cut off, by linking the battery, power is supplied to the lamp tube when the mains power cannot be supplied normally, and the main control module controls the lighting element to work at 30%-50% power, thereby enabling emergency lighting and facilitating user use. Description of the Drawings

[0021] Figure 1 Schematic diagram of the main control module of the present utility model;

[0022] Figure 2 Schematic diagram of the circuit of the first optical relay and the second optical relay of the present utility model;

[0023] Figure 3 Schematic diagram of the circuit of the third MOS transistor and the second triode of the present utility model;

[0024] Figure 4 Schematic diagram of the wall switch circuit of the present utility model;

[0025] Figure 5 Schematic diagram of the charging module circuit of the present utility model;

[0026] Figure 6 Schematic diagram of the logic input module circuit of the present utility model;

[0027] Figure 7Schematic diagram of each functional module of the present utility model. Detailed implementation manners

[0028] To describe the present utility model more clearly, the present utility model will be further described below with reference to the accompanying drawings.

[0029] In the following description, specific details are given to provide a deeper understanding of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. It should be understood that the specific embodiments are only used to explain the present utility model, rather than to limit the present utility model.

[0030] It should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of the described features, wholes, steps, operations, elements or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components or their combinations; for the circuits involved in the present application, when those skilled in the art can understand, the corresponding relevant circuit features can be supplemented from the accompanying drawings of the specification to explain the present solution.

[0031] To solve the above-mentioned technical problems, the present application provides a control circuit for a downlight power supply box that combines emergency lighting and general lighting. Please refer to the attached Figure 1 to the attached Figure 7 , which includes a battery, a logic input module, and a light-emitting element electrically connected to the main control module; wherein, the logic input module is connected to the mains power supply and is used to judge whether the input voltage meets the value. If so, a first control signal is generated; if not, a second control signal is generated; the main control module responds to the first control signal to control the light-emitting element to work at a first preset power or responds to the second control signal, and the light-emitting element uses the battery as the driving voltage source and works at a second preset power; in a specific layout scheme, the logic input module, the main control module, and the battery are all mounted on the control board of the power supply box. By the logic input module, it judges whether there is mains voltage. When the mains power supply is normal, the main control module controls the light-emitting element to work at 100% power. When the mains power is cut off, by equipping with a battery, it realizes the power supply to the lamp tube when the mains power cannot be supplied normally, and the main control module controls the light-emitting element to work at 30%-50% power, thereby being able to realize emergency lighting and being convenient for users to use.

[0032] Specific usage examples are as follows: First, the voltage of the commercial power is collected and detected through the logic input module. If the detected voltage of the commercial power is 100V - 277V, a first control signal is generated. The main control module responds to the first control signal to control the light-emitting element to work at the first power. The first power is the light-emitting element working at full load power, that is, the first power is 100% load power. At this time, the battery does not work. When the commercial power cannot provide normal power supply, the logic input module determines that the input voltage of the commercial power is 0V and generates a second control signal. The main control module responds to the second control signal to control the battery to work so that the light-emitting unit works at the second power. The second power is 30% - 50% load power.

[0033] In this embodiment, it further includes a charging module for charging the battery. The input end of the charging module is connected to the commercial power, and the output end is connected to the battery. The battery is charged by the charging module when the commercial power is connected and supplied normally to ensure that the battery has sufficient power, so that there will be no power shortage during emergency use.

[0034] In a specific solution, please refer to Figure 5 , the charging module includes a first rectifier bridge BR1, a first transformer T2, a first resistor R61, a second resistor R62, and a first triode Q20. The input end of the first rectifier bridge BR1 is connected to the commercial power, and the output end is connected to the first transformer T2. The battery is connected to the end of the first transformer T2 far from the first rectifier bridge BR1. Among them, the collector of the first triode Q20 is coupled to the first connection point between the first transformer and the battery. The emitter of the first triode Q20 is grounded, and the base is coupled to the first resistor R61 and the second resistor R62 connected in parallel. The main control module includes a main control chip U7. The EN_CH pin of the main control chip U7 is coupled (corresponding attachment Figure 1The 27th pin (of [description]) is coupled to the second connection point between the first connection point and the battery. The model of the main control chip U7 is: MM32F0230, and it also processes the first control signal and the second control signal through this main control chip U7, so as to realize the on / off of the light-emitting element with different powers based on whether the driving power source is the mains power or the battery; it is not difficult to understand that the first rectifier bridge BR1 is used to convert the alternating current of the mains power into direct current to fit the current mode of the components. Subsequently, the first transformer T2 processes the voltage so that the battery can obtain a suitable charging voltage, and through the cooperation of the first transistor Q20, the first resistor R61 and the second resistor R62, a constant current is realized for charging the battery; in a better solution, a common-mode inductor L1 is also provided between the output end of the mains power and the first rectifier bridge BR1 to make the electromagnetic compatibility meet the usage requirements; a color-ring inductor L2 is also provided between the first rectifier bridge BR1 and the first transformer T2. Through the color-ring inductor L2 and the common-mode inductor L1, the rationality of the electromagnetic compatibility is further improved, so that the carried lamp tube can smoothly pass the relevant tests of the electromagnetic compatibility.

[0035] During emergency use, the driving voltage provided by the battery is too low to drive the light-emitting unit to work at 30%-50% of the power set by the second power. Therefore, in this embodiment, a boost chip U1 is also included. The control enable pin of the boost chip U1 (corresponding to the Figure 6 7th pin of [description]) is connected to the battery; the supplementary pin of the boost chip U1 (corresponding to the Figure 6 3rd pin of [description]) and the input pin (corresponding to the Figure 6 2nd pin of [description]) are jointly coupled to the DC-DC PWM enable pin of the main control chip U7 (corresponding to the Figure 1 9th pin of [description]); the specific model of the boost chip U1 is QX5305. By adding the boost chip U1, the battery can be used to drive the light-emitting unit emergently.

[0036] In this embodiment, the red, logic input module includes a second rectifier bridge BR2, a second transformer T1 and a voltage regulator chip U6. The input end of the second rectifier bridge BR2 is connected to the mains power, and the output end is coupled to the first transformer coil of the second transformer T1. The voltage regulator chip U6 is coupled to the second transformer coil of the second transformer; the third transformer coil of the second transformer is arranged opposite to the first transformer coil and is connected to the first PWM pin (corresponding to the Figure 1 1st pin in [description]) and the second PWM pin of the main control chip U7 (corresponding to the Figure 5Pin 28 in it); It is not difficult to understand that the functions of the second rectifier bridge BR2 and the first rectifier bridge BR1 are similar, both converting the alternating current of the mains into direct current suitable for the lamp tubes equipped with this circuit. The second transformer T1 cooperates with the voltage regulator chip U6, and the model of the voltage regulator chip U6 is the 1692 series chip. This chip can freely adjust the ratio of the second transformer coil to the first transformer coil to ensure that the induced current output to the third transformer coil conforms to the current parameters of the light-emitting unit, so as to ensure that the lamps equipped with this circuit can emit light normally when the mains is in normal use.

[0037] In a preferred solution, a first MOS transistor Q5 and a second MOS transistor Q6 are further provided between the third transformer coil and the main control chip U7; the drain of the first MOS transistor Q5 is coupled to the first negative electrode C-, the gate is coupled to the first PWM pin of the main control chip U7 (i.e., corresponding to the Figure 1 pin 1), and the source is coupled to the output terminal of the third transformer coil; the drain of the second MOS transistor is coupled to the second negative electrode W-, the gate is coupled to the second PWM pin of the main control chip U7 (i.e., corresponding to the Figure 1 pin 28), and the source is coupled to the output terminal of the third transformer coil; it can be understood that the polarity of the wiring electrodes of the lamp tube equipped with this application is of the type of two negative electrodes and one positive electrode. By controlling the operating time of the first MOS transistor Q5 and the second MOS transistor Q6 through PWM technology, and then according to the on-off conditions of the first MOS transistor Q5 and the second MOS transistor Q6, the color temperature of the light is adjusted, such as realizing working modes such as positive white light, warm white light or warm yellow light, so that users can obtain more diverse usage modes.

[0038] In this embodiment, it further includes a first optical relay OP2 and a second optical relay OP4; the input ends of the first optical relay are commonly coupled with MCU VDD and a first reactor, and the output ends are coupled to the ground and connected to the first enable pin of the main control chip U7 at the same time (i.e., corresponding to the Figure 1 pin 3); the input ends of the second optical relay OP4 are commonly coupled with MCU VDD and a second reactor, and the output ends are coupled to the ground and connected to the second enable pin of the main control chip U7 at the same time (i.e., corresponding to the Figure 1 pin 4); the first optical relay OP2 and the first reactor cooperate, and the second optical relay OP4 and the second reactor cooperate, so that the main control chip U7 can reasonably adjust the luminous power of the light-emitting element, and can realize multiple brightness and multiple color temperature regulations and uses in combination with different color temperature schemes, and the user experience is better.

[0039] In this embodiment, the main control module is further configured to collect whether the voltage of the battery is lower than a threshold value. If so, it controls the battery to be electrically disconnected from the light-emitting element, thereby preventing the battery from being damaged due to over-discharge. When connected to the mains power, the charging module is correspondingly activated to charge the battery for use during emergency lighting.

[0040] In a specific solution, there are a second triode Q13 and a third MOS transistor Q9. The base of the second triode Q13 is coupled to the voltage detection pin of the main control chip U7 (i.e., the corresponding Figure 1 pin 2), the emitter is coupled to SGND, the collector is connected to the gate of the third MOS transistor Q9, and the source of the third MOS transistor Q13 is connected to BAT+; it is not difficult to understand that the main control chip U7 continuously collects the voltage condition of the battery. When it detects that the voltage is lower than the preset threshold value, it controls the second triode Q13 to turn off, and further the third MOS transistor Q9 will also turn off, thereby disconnecting between the battery and the main control chip U7, achieving complete power-off, preventing the battery from being damaged due to over-discharge, and protecting the battery life.

[0041] In a specific solution, the main control mode is also coupled with a wall switch wall_sw, and the wall switch wall_sw is used to control whether the light-emitting unit is turned on and off when the mains voltage is detected; for example, when the wall switch wall_sw is in the closed state and the logic input module detects the mains voltage, the main control module controls the light-emitting unit to work at the first power based on the above collection conditions of the wall switch wall_sw and the logic input module; when the wall switch wall_sw is in the open state and the logic input module detects the mains voltage, the main control module controls the light-emitting unit not to work based on the above collection conditions of the wall switch and the logic input module; it can be seen that under normal mains supply, the user can turn on and off the lamp tube carrying the circuit of this application through the wall switch wall_sw; when the mains cannot be normally supplied, regardless of whether the wall switch wall_sw is in the open or closed state, the main control module controls the light-emitting unit to work at the second power for emergency lighting.

[0042] The advantages of the present utility model are as follows:

[0043] 1. By controlling the running time of the first MOS transistor and the second MOS transistor through PWM technology, and then realizing the adjustment of the light color temperature according to the on-off conditions of the first MOS transistor and the second MOS transistor, such as realizing working modes such as positive white light, warm white light or warm yellow light, enabling users to obtain more diverse usage modes;

[0044] 2. By charging the battery through the charging module when the mains connection is normally supplied, to ensure that the battery has sufficient power, so that there will be no power shortage during emergency use;

[0045] 3. Through the cooperation of the first optical relay OP2 and the first reactor, and the cooperation of the second optical relay OP4 and the second reactor, the main control chip U7 can reasonably adjust the luminous power of the light-emitting element. With different color temperature schemes, multiple brightness levels and multiple color temperature regulations can be achieved, providing a better user experience.

[0046] The above are only several specific embodiments of the present utility model disclosed, but the present utility model is not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A control circuit for a downlight power supply box that combines emergency lighting and general lighting, characterized in that, Comprising: A battery; A logic input module, connected to the mains power, for determining whether the input voltage meets a value. If so, a first control signal is generated; if not, a second control signal is generated; A main control module, the main control module responds to the first control signal to control the light-emitting element to operate at a first preset power; or responds to the second control signal, and the light-emitting element uses the battery as a driving power source and operates at a second preset power.

2. The control circuit of the downlight power supply box integrating emergency lighting and general lighting according to claim 1, characterized in that It further includes a charging module for charging the battery. The input end of the charging module is connected to the mains power, and the output end is connected to the battery.

3. The control circuit of the downlight power supply box integrating emergency lighting and general lighting according to claim 2, characterized in that, The charging module includes a first rectifier bridge, a first transformer, a first resistor, a second resistor and a first triode. The input end of the first rectifier bridge is connected to the mains power, the output end is connected to the first transformer, and the battery is connected to the end of the first transformer far from the first rectifier bridge; Wherein, the collector of the first triode is coupled to the first connection point between the first transformer and the battery, the emitter of the first triode is grounded, and the base is coupled to the first resistor and the second resistor connected in parallel; the main control module includes a main control chip, and the EN_CH enable pin of the main control chip is coupled to the second connection point between the first connection point and the battery.

4. The control circuit of the downlight power supply box integrating emergency lighting and general lighting according to claim 3, characterized in that, It further includes a boost chip, and the control enable pin of the boost chip is connected to the battery; the supplementary pin and the input pin of the boost chip are commonly coupled to the DC-DC PWM enable pin of the main control chip.

5. The control circuit of the downlight power supply box integrating emergency lighting and general lighting according to claim 3, characterized in that, The logic input module includes a second rectifier bridge, a second transformer and a voltage regulator chip. The input end of the second rectifier bridge is connected to the mains power, the output end is coupled to the first transformer coil of the second transformer, and the voltage regulator chip is coupled to the second transformer coil of the second transformer; the third transformer coil of the second transformer is disposed opposite to the first transformer coil and is connected to the first PWM pin and the second PWM pin of the main control chip.

6. The control circuit of the downlight power supply box integrating emergency lighting and general lighting according to claim 5, characterized in that, A first MOS tube and a second MOS tube are further provided between the third transformer coil and the main control chip; the drain of the first MOS tube is coupled to the first electrode, the gate is coupled to the first PWM pin of the main control chip, and the source is coupled to the output end of the third transformer coil; The drain of the second MOS tube is coupled to the second electrode, the gate is coupled to the second PWM pin of the main control chip, and the source is coupled to the output end of the third transformer coil.

7. The control circuit of the downlight power supply box integrating emergency lighting and general lighting according to claim 3, characterized in that, It further includes a first optical relay and a second optical relay; the input ends of the first optical relay are commonly coupled with MCUVDD and a first reactor, and the output ends are both coupled to the ground and connected to the first enable pin of the main control chip; the input ends of the second optical relay are commonly coupled with MCU VDD and a second reactor, and the output ends are both coupled to the ground and connected to the second enable pin of the main control chip.

8. The control circuit of the downlight power supply box integrating emergency lighting and general lighting according to claim 7, characterized in that, The main control module is further used to collect whether the voltage of the battery is lower than a threshold value. If so, it controls the battery to be electrically disconnected from the light-emitting element.

9. The control circuit of the downlight power supply box integrating emergency lighting and general lighting according to claim 3, characterized in that, It further includes a second triode and a third MOS transistor. The base of the second triode is coupled to the voltage detection pin of the main control chip, the emitter is coupled to SGND, and the collector is connected to the gate of the third MOS transistor. The source of the third MOS transistor is connected to BAT+.

10. The control circuit of the downlight power supply box for the integration of emergency lighting and general lighting according to claim 3, characterized in that, The main control module is further coupled to a wall switch wall_sw, and the wall switch wall_sw is used to control the turning on and off of the light-emitting element when the mains voltage is detected.

Images