Emergency trigger control circuit of LED emergency power supply and LED emergency light

Abstract

The present invention discloses an emergency trigger control circuit of an LED emergency power supply and an LED emergency light. The emergency trigger control circuit of the LED emergency power supply includes an auxiliary power supply, a relay and a trigger control unit. The auxiliary power supply is used to input AC power from the mains and rectify and reduce the voltage of the AC power from the mains to output DC power. The two ends of the coil of the relay are correspondingly connected to the positive output end and the negative output end of the auxiliary power supply, which are used to connect the mains power with the LED driver when the mains power is normally supplied, and to connect the emergency power supply with the LED driver when the mains power is cut off. The trigger control unit includes an energy storage device inside, which is charged when the mains power is normally supplied. The trigger control unit is respectively connected to the emergency power supply and the battery, which is used to connect the battery with the emergency power supply when the mains power is cut off and the energy storage device is charged to start the emergency power supply to work.

Description

Technical Field

[0001] The invention relates to the technical field of LED emergency lighting, and in particular to an emergency trigger control circuit of an LED emergency power supply and an LED emergency light. Background Art

[0002] With the development of LED lights and security needs, LED emergency power supplies have emerged. In order to prevent the battery from running out during transportation, the existing emergency power supplies are not connected properly to the emergency power supply when leaving the factory. Customers need to turn on the emergency power supply and then connect the battery during installation. In order to facilitate customer installation and prevent the battery from running out during transportation, it is necessary to develop an emergency trigger control circuit so that the battery and emergency power supply are connected properly when leaving the factory, and can be directly installed at the customer end. The emergency function is automatically triggered by the mains power, which is convenient for customer installation and ensures that the battery will not run out during transportation. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an emergency trigger control circuit of an LED emergency power supply and an LED emergency light, so that the battery of the LED emergency power supply can be connected at the factory and it can be ensured that the battery power will not be exhausted during transportation.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] An emergency trigger control circuit for an LED emergency power supply includes an auxiliary power supply, a relay and a trigger control unit. The auxiliary power supply is used to input AC power from the mains and rectify and step down the AC power to output DC power. The two ends of the coil of the relay are correspondingly connected to the positive output end and the negative output end of the auxiliary power supply, which is used to connect the mains power with the LED driver when the mains power is normally supplied, and to connect the emergency power supply with the LED driver when the mains power is cut off. The trigger control unit includes an energy storage device inside, which is charged when the mains power is normally supplied. The trigger control unit is connected to the emergency power supply and the battery respectively, and is used to connect the battery with the emergency power supply when the mains power is cut off and the energy storage device is charged to start the emergency power supply to work.

[0006] Preferably, the trigger control unit includes an energy storage capacitor EC14, a PMOS tube Q3, an NMOS tube Q5, an NMOS tube Q6, a rectifier diode D6, a rectifier diode D12, a pull-up resistor R17, a voltage divider resistor R31, a voltage divider resistor R32 and a current limiting resistor R33. The anode of the rectifier diode D12, the gate of the NMOS tube Q6, and one end of the current limiting resistor R33 are connected to the positive output end of the auxiliary power supply, and the other end of the current limiting resistor R33 is respectively connected to the drain of the NMOS tube Q6 and the gate of the NMOS tube Q5. The source of the NMOS tube Q6 and the source of the NMOS tube Q5 are grounded, and the drain of the NMOS tube Q5 is grounded. The gate of the PMOS tube Q3 is connected to the battery through a pull-up resistor R17, the gate of the PMOS tube Q3 is connected to the drain of the NMOS tube Q5, the source of the PMOS tube Q3 is connected to the battery, the drain of the PMOS tube Q3 is respectively connected to the power supply end of the driving chip of the emergency power supply and the anode of the rectifier diode D6, the cathode of the rectifier diode D6 is connected to the positive electrode of the energy storage capacitor EC14 and the cathode of the rectifier diode D12, the negative electrode of the energy storage capacitor EC14 is grounded, the voltage-dividing resistor R31 and the voltage-dividing resistor R32 are connected in series and connected in parallel with the energy storage capacitor EC14, and the connection node between the voltage-dividing resistor R31 and the voltage-dividing resistor R32 is connected to the gate of the NMOS tube Q5.

[0007] Preferably, the trigger control unit also includes a current limiting resistor R30 and a current limiting resistor R34, one end of the current limiting resistor R30 is connected to the drain of the NMOS tube Q5, and the other end of the current limiting resistor R30 is respectively connected to the pull-up resistor R17 and the gate of the PMOS tube Q3, and the gate of the NMOS tube Q6 is connected to the positive output end of the auxiliary power supply through the current limiting resistor R34.

[0008] Preferably, the trigger control unit further includes an energy storage capacitor EC12, the positive electrode of the energy storage capacitor EC12 is connected to the power supply terminal of the driving chip of the emergency power supply, and the negative electrode is grounded.

[0009] An LED emergency light comprises the emergency trigger control circuit of the LED emergency power supply mentioned above.

[0010] The beneficial technical effect of the present invention is that the emergency trigger control circuit of the above-mentioned LED emergency power supply, the trigger control unit connects the battery and the emergency power supply to make the emergency power supply start working only when the mains power is cut off and the energy storage device is energized. In this way, even if the LED emergency power supply is connected to the battery when it leaves the factory, the energy storage device inside the trigger control unit is not energized because the mains power is not connected. Therefore, the battery is not connected to the emergency power supply, the battery does not supply power to the emergency power supply, and the emergency power supply does not work, thereby ensuring that the battery power will not be consumed during transportation, so that the battery of the LED emergency power supply can be connected when it leaves the factory and it can be ensured that the battery power will not be consumed during transportation, which is convenient for transportation and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 The diagram is a circuit structure diagram of an emergency trigger control circuit of an LED emergency power supply of the present invention. DETAILED DESCRIPTION

[0013] In order to make the ordinary technicians in the field more clearly understand the purpose, technical solutions and advantages of the present invention, the present invention is further explained in conjunction with the drawings and embodiments. The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain this patent, and cannot be understood as limiting this patent.

[0014] like Figure 1 As shown, in one embodiment of the present invention, the emergency trigger control circuit of the LED emergency power supply includes an auxiliary power supply 10, a relay K1 and a trigger control unit 20. The auxiliary power supply 10 is used to input AC power from the mains and rectify and step down the AC power from the mains to output DC power. The auxiliary power supply 10 can be implemented by a conventional power supply structure on the market, which will not be described in detail here. The two ends of the coil of the relay K1 are correspondingly connected to the positive output end (DC+12V) and the negative output end (ground) of the auxiliary power supply 10, which is used to connect the mains power with the LED driver 30 when the mains power is normally supplied, and to connect the emergency power supply with the LED driver 30 when the mains power is off. The LED driver 30 can be implemented by a conventional LED driver on the market, which will not be described in detail here. The trigger control unit 20 includes an energy storage device inside, which is charged when the mains power is normally supplied. The trigger control unit 20 is connected to the emergency power supply and the battery BAT+ respectively, which is used to connect the battery BAT+ with the emergency power supply when the mains power is off and the energy storage device is charged to start the emergency power supply to work.

[0015] In the emergency trigger control circuit of the LED emergency power supply of the present invention, the trigger control unit 20 connects the battery BAT+ with the emergency power supply to make the emergency power supply start working only when the mains power is cut off and the energy storage device is charged. In this way, even if the LED emergency power supply is connected to the battery BAT+ when it leaves the factory, the energy storage device inside the trigger control unit 20 is not charged because the mains power is not connected. Therefore, the battery BAT+ is not connected to the emergency power supply, the battery BAT+ does not supply power to the emergency power supply, and the emergency power supply does not work, thereby ensuring that the power of the battery BAT+ will not be consumed during transportation, so that the battery BAT+ of the LED emergency power supply can be connected when it leaves the factory and can ensure that the power of the battery will not be consumed during transportation, which is convenient for transportation and installation.

[0016] like Figure 1 As shown, in a preferred embodiment of the present invention, the trigger control unit 20 includes an energy storage capacitor EC14, a PMOS tube Q3, an NMOS tube Q5, an NMOS tube Q6, a rectifier diode D6, a rectifier diode D12, a pull-up resistor R17, a voltage divider resistor R31, a voltage divider resistor R32 and a current limiting resistor R33. The anode of the rectifier diode D12, the gate of the NMOS tube Q6, and one end of the current limiting resistor R33 are connected to the positive output end (DC+12V) of the auxiliary power supply 10, and the other end of the current limiting resistor R33 is respectively connected to the drain of the NMOS tube Q6 and the gate of the NMOS tube Q5. The source of the NMOS tube Q6 and the source of the NMOS tube Q5 are grounded. The drain of Q5 is connected to the battery BAT+ through the pull-up resistor R17, the gate of the PMOS tube Q3 is connected to the drain of the NMOS tube Q5, the source of the PMOS tube Q3 is connected to the battery BAT+, the drain of the PMOS tube Q3 is respectively connected to the power supply end (IC-VCC) of the driving chip of the emergency power supply and the anode of the rectifier diode D6, the cathode of the rectifier diode D6 is connected to the positive electrode of the energy storage capacitor EC14 and the cathode of the rectifier diode D12, the negative electrode of the energy storage capacitor EC14 is grounded, the voltage dividing resistor R31 and the voltage dividing resistor R32 are connected in series and then connected in parallel with the energy storage capacitor EC14, and the connection node between the voltage dividing resistor R31 and the voltage dividing resistor R32 is connected to the gate of the NMOS tube Q5.

[0017] When the battery of the emergency power supply is connected but not connected to the mains, the positive output terminal (DC+12V) of the auxiliary power supply 10 has no output, the NMOS tube Q6, the NMOS tube Q5 and the PMOS tube Q3 are not conducting, the power supply terminal (IC-VCC) of the driver chip of the emergency power supply has no power, and the emergency power supply does not work.

[0018] When the emergency power supply is connected to the mains, the positive output terminal (DC+12V) of the auxiliary power supply 10 outputs 12V DC, the NMOS tube Q6 is turned on, the NMOS tube Q5 and the PMOS tube Q3 are not turned on, and the energy storage capacitor EC14 is charged to 12V, the IC-VCC voltage is 0V, and the relay K1 is energized. At this time, the LED driver 30 is powered by the mains; when the mains is abnormally cut off, the auxiliary power supply 10 outputs 0V, the NMOS tube Q6 is not turned on, but because the energy storage capacitor EC14 is still charged, the NMOS tube Q5 is turned on. The PMOS tube Q3 is turned on, and then the battery BAT+ supplies power to IC-VCC and the energy storage capacitor EC14. At this time, the emergency power supply works, and the relay K1 switches to power the LED driver 30 by the emergency power supply, thereby ensuring that the light does not go out; when the mains power returns to normal, the auxiliary power supply 10 outputs 12V, the relay K1 is energized, and the LED driver 30 is switched to be powered by the mains power. At the same time, the NMOS tube Q6 is turned on, while the NMOS tube Q5 and the PMOS tube Q3 are not turned on, there is no voltage at IC-VCC, and the emergency power supply does not work!

[0019] like Figure 1 As shown, in a preferred embodiment of the present invention, the trigger control unit 20 also includes a current limiting resistor R30 and a current limiting resistor R34, one end of the current limiting resistor R30 is connected to the drain of the NMOS tube Q5, and the other end of the current limiting resistor R30 is respectively connected to the pull-up resistor R17 and the gate of the PMOS tube Q3, and the gate of the NMOS tube Q6 is connected to the positive output end of the auxiliary power supply 10 through the current limiting resistor R34. The trigger control unit 20 also includes an energy storage capacitor EC12, the positive electrode of the energy storage capacitor EC12 is connected to the power supply end (IC-VCC) of the driver chip of the emergency power supply, and the negative electrode is grounded. The energy storage capacitor EC12 can effectively prevent sudden changes in current and voltage and provide protection for the emergency power supply.

[0020] The present invention also provides an LED emergency light, the LED emergency light comprising: Figure 1 The emergency trigger control circuit of the LED emergency power supply in the illustrated embodiment.

[0021] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Those skilled in the art can make various equivalent changes and improvements based on the above embodiments, and all equivalent changes or modifications made within the scope of the claims should fall within the protection scope of the present invention.

Claims

1. An emergency trigger control circuit for an LED emergency power supply, It is characterized in that The emergency trigger control circuit of the LED emergency power supply includes: An auxiliary power supply, which inputs AC power from the mains and rectifies and steps down the voltage of the AC power to output DC power; A relay, the two ends of the coil of which are connected to the positive and negative output ends of the auxiliary power supply respectively, for connecting the mains power supply and the LED driver when the mains power supply is normal, and connecting the emergency power supply and the LED driver when the mains power supply is off; A trigger control unit, which includes an energy storage device inside, and the energy storage device is charged when the mains power is normally supplied. The trigger control unit is connected to the emergency power supply and the battery respectively, and is used to connect the battery and the emergency power supply to start working when the mains power is cut off and the energy storage device is charged; The trigger control unit includes an energy storage capacitor EC14, a PMOS tube Q3, an NMOS tube Q5, an NMOS tube Q6, a rectifier diode D6, a rectifier diode D12, a pull-up resistor R17, a voltage divider resistor R31, a voltage divider resistor R32 and a current limiting resistor R33. The anode of the rectifier diode D12, the gate of the NMOS tube Q6, and one end of the current limiting resistor R33 are connected to the positive output end of the auxiliary power supply, and the other end of the current limiting resistor R33 is respectively connected to the drain of the NMOS tube Q6 and the gate of the NMOS tube Q5. The source of the NMOS tube Q6 and the source of the NMOS tube Q5 are grounded, and the drain of the NMOS tube Q5 is connected to the positive output end. The pull-up resistor R17 is connected to the battery, the gate of the PMOS tube Q3 is connected to the drain of the NMOS tube Q5, the source of the PMOS tube Q3 is connected to the battery, the drain of the PMOS tube Q3 is respectively connected to the power supply end of the driving chip of the emergency power supply and the anode of the rectifier diode D6, the cathode of the rectifier diode D6 is connected to the positive electrode of the energy storage capacitor EC14 and the cathode of the rectifier diode D12, the negative electrode of the energy storage capacitor EC14 is grounded, the voltage dividing resistor R31 and the voltage dividing resistor R32 are connected in series and then connected in parallel with the energy storage capacitor EC14, and the connection node between the voltage dividing resistor R31 and the voltage dividing resistor R32 is connected to the gate of the NMOS tube Q5.

2. The emergency trigger control circuit of the LED emergency power supply according to claim 1, It is characterized in that The trigger control unit also includes a current limiting resistor R30 and a current limiting resistor R34, one end of the current limiting resistor R30 is connected to the drain of the NMOS tube Q5, and the other end of the current limiting resistor R30 is respectively connected to the pull-up resistor R17 and the gate of the PMOS tube Q3, and the gate of the NMOS tube Q6 is connected to the positive output end of the auxiliary power supply through the current limiting resistor R34.

3. The emergency trigger control circuit of the LED emergency power supply as claimed in claim 2, It is characterized in that The trigger control unit also includes an energy storage capacitor EC12, the positive electrode of the energy storage capacitor EC12 is connected to the power supply end of the driving chip of the emergency power supply, and the negative electrode is grounded.

4. An LED emergency light, It is characterized in that The LED emergency light comprises an emergency trigger control circuit of the LED emergency power supply as described in any one of claims 1-3.

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