A flashing xenon lamp circuit device

Abstract

The present application discloses a flashing xenon lamp circuit device, which relates to the technical field of circuit devices for discharge lamp ignition or control. The circuit device includes an MCU, a transformer circuit, a voltage regulation unit, a sensor circuit, a voltage monitoring unit, a current monitoring unit, an OCP operational amplifier comparator, an OVP operational amplifier comparator, and an abnormal control unit. The detection and protection module and the abnormal cut-off circuit of the flashing xenon lamp circuit device provided by the present application can reduce potential safety hazards; the MCU has good triggering flexibility; for the PWM regulation unit, precise and flexible feedback regulation can be performed, and the voltage value and waveform stability excited by the transformer can be controlled; moreover, the flashing xenon lamp circuit provided by the present application can extend the service life of the device, improve the technical level of various applications, and promote the progress and development of related industries.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit devices for discharging lamp ignition or control, and more particularly to a flashing xenon lamp circuit device. Background Art

[0002] The luminescence principle of a xenon flash lamp is based on the gas discharge phenomenon. Its working mechanism involves the following key steps:

[0003] 1: Initial charging: Before use, the power supply charges the energy storage capacitors, which can store a large amount of electrical energy. 2: Trigger pulse: When the xenon lamp needs to be lit, a high-voltage trigger pulse is applied to the trigger coil or directly to the trigger point near the lamp tube. This high voltage can generate a strong electric field inside the lamp tube. 3: Ionization process: Due to the strong electric field generated by the trigger pulse, electrons in the xenon gas are accelerated and gain enough energy to collide with xenon atoms, causing electrons in the xenon atoms to be excited to higher energy levels. At the same time, collision ionization also occurs, that is, electrons knock out electrons in other xenon atoms, forming more free electrons and positive ions, thus starting an avalanche ionization process. 4: Discharge and luminescence: With the presence of a large number of free electrons, they will move rapidly under the action of a strong electric field and collide inelastically with xenon atoms frequently, causing the xenon atoms to continuously transition to the excited state. When the excited xenon atoms return to the ground state or a lower energy state from the excited state, photons will be emitted. Since xenon gas can emit a continuous spectrum in the range from ultraviolet to infrared, its light looks white and very bright. 5: Continuous flashing: Once the discharge channel is established, the electrical energy stored in the capacitor will quickly be released through the lamp tube, maintaining a short but intense current, resulting in an instant high-intensity light output. This process usually lasts from a few milliseconds to several hundred milliseconds, depending on specific application requirements and design parameters. 6: Cooling and recovery: After a flash, the temperature inside the lamp tube will gradually decrease, and the gas returns to its normal state, ready to receive the next trigger. 7: Repeated operation: For applications that require continuous operation, the above process will be repeated at a set time interval.

[0004] Xenon lamp circuit devices are widely used in industries, medical treatment, scientific research, laboratories and other fields. However, due to the lack of a detection and protection module, an abnormal cut-off circuit, an MCU regulation and communication circuit, etc. in the existing xenon lamp circuit devices, the triggering flexibility of the xenon lamp circuit device is poor, the waveform is unstable, and there are certain safety hazards, which are likely to cause damage to the xenon lamp. Summary of the Invention

[0005] In view of this, the present invention provides a flashing xenon lamp circuit device, which has a compact circuit structure, good stability, high safety, and can extend the service life of the circuit device.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a flashing xenon lamp circuit device, which includes: an MCU, a transformer circuit, a voltage regulating unit, a sensor circuit, a voltage monitoring unit, a current monitoring unit, an OCP operational amplifier comparator, an OVP operational amplifier comparator, and an abnormal control unit;

[0007] Among them, the voltage monitoring unit specifically includes: the output voltage V1 after being converted and rectified by the transformer circuit. After being divided by six identical resistors R19, R21, R24, R28, R31, R33 and another different resistor R37, a voltage V2 is generated at the connection between the resistors R33 and R37. The operational amplifier U5 is used for voltage following. The positive input terminal of U5 inputs the voltage V2, and the negative input terminal is connected to the output terminal of U5, following the voltage V2 to OVP_AOUT and outputting it to the OVP operational amplifier comparator;

[0008] The abnormal control unit specifically includes: U6 and U7 are two identical OR gate logic integrated circuits, each having 5 pins. The 1st pin of U6 is connected to OVP_Interrupt output by the OVP operational amplifier comparator, the 2nd pin of U6 is connected to OCP_Interrupt output by the OCP operational amplifier comparator, and the 3rd pin of U6 is grounded. When overvoltage or overcurrent occurs, or both occur simultaneously, the 4th pin of U6 outputs a high level, otherwise it outputs a low level. The high level or low level is input to the 1st pin of the next OR gate U7. The 5th pin of U6 is connected to a voltage source, and one end of a capacitor C48 is connected between the voltage source and the 5th pin, and the other end of the C48 is grounded; the 2nd pin of U7 is connected to the Timer_OUT square wave signal, and the Timer_OUT square wave signal is the trigger signal of the subsequent starting circuit, which is directly output by the MCU. When the 1st pin of U7 receives a high level in the case of overcurrent or overvoltage, regardless of whether the Timer_OUT square wave signal is high level or low level, the Alert_Ctr signal output by the 4th pin of U7 is high level; the 3rd pin of U7 is grounded, and the 5th pin is connected to a voltage source, and one end of a capacitor C37 is connected between the voltage source and the 5th pin, and the other end of the C37 is grounded;

[0009] The specific transformer circuit includes: The Alert_Ctr signal is output to the base of a PNP transistor through a current-limiting resistor R12. The collector of the PNP transistor is connected between the current-limiting resistor R11 and the gate of the NMOS transistor Q2. The emitter of the PNP transistor is grounded. When Alert_Ctr is at a high level, the PNP transistor conducts; One end of the pull-down resistor R15 is connected between R12 and the base of the PNP transistor, and the other end of R15 is grounded; The gate of the NMOS transistor Q2 is connected to a current-limiting resistor R11. The drain of Q2 is connected to pin 7 of a transformer, and the source is grounded through a current-limiting resistor R16; When the voltage between the gate and the source of the NMOS transistor Q2 is not sufficient to turn on Q2, the input of the transformer appears open and the output is cut off; The transformer has 8 pins. Pins 1, 5, and 8 are not connected. Pin 6 is connected to the voltage VIN; Pin 4 outputs the main discharge voltage V_600V through two rectifier diodes D2 and D3 and two protection diodes D6 and D7. Among them, D2 and D3 are in series in this path, and D6 and D7 are in series with each other and are connected in parallel as a whole in this path. The other end of D7 is grounded; Pin 2 is grounded; When there is no overvoltage or overcurrent, the 4th pin of U6 outputs a low level. At this time, the output Alert_Ctr of U7 is the level of Timer_OUT. This signal is the trigger signal for the subsequent starting circuit, enabled by a high level. At the same time, when at a high level, the transformer circuit switches the output off; The flashing xenon lamp needs to charge and discharge the capacitor for ionization. When Timer_OUT is at a low level, pin 3 of the transformer outputs VCC6 through two rectifier diodes D4 and D5 to charge the subsequent capacitor, and at the same time turns off the optocoupler; When Timer_OUT is at a high level, the transformer circuit switches the output off, the optocoupler turns on, and the subsequent capacitor starts to discharge, generating a kilovolt-level voltage through the trigger coil to ionize the xenon gas and emit light.

[0010] Further, the current monitoring unit specifically includes: J1 is the schematic package of the flashing xenon lamp L4642, with a total of 9 pins. Among them, pin 9 is the cathode, and pin 9 is grounded through the sampling resistor R4. When the flashing xenon lamp is working, the positive and negative input terminals of the precision instrumentation amplifier U1 are connected to both ends of the sampling resistor R4 to collect the voltage value across R4 and amplify the collected voltage value; U2 is used for voltage following, and the voltage obtained by dividing the power supply voltage VDD_3V3 of U2 through the resistors R12 and R13 is followed to pin 5 of U1 for the reference voltage when U1 is working; one ends of the capacitors C22 and C18 are respectively connected to the power supply terminals of U2 and U1, and the other ends are grounded for power supply filtering; the other two input terminals of U1 are connected through an external gain resistor R10; R9 is connected between the negative input terminal of U1 and one end of the resistor R4, one end of the capacitor C19 is connected between the negative input terminal of U1 and one end of the resistor R9, and the other end is grounded. R11 is connected between the positive input terminal of U1 and the other end of the resistor R4, one end of the capacitor C21 is connected between the positive input terminal of U1 and one end of the resistor R11, and the other end is grounded. The R9, C19, R11, and C21 form a low-pass filter for providing RFI suppression for the circuit; one end of the C19 is connected to one end of the C21 through a common-mode rejection capacitor C20; the output OCP_AOUT is sent to the OCP operational amplifier comparator.

[0011] Further, the OCP operational amplifier comparator specifically includes: PWM_OCP is connected to the IO port of the MCU and is used to receive the PWM waveform signal output by the MCU. The other end of PWM_OCP is connected to the base of the triode Q1 and is used to control the rapid conduction and turn-off of the triode Q1; the VDD_8V pull-up voltage is used to provide a voltage source for Q1, and the emitter of Q1 is grounded; one end of the resistor R15 is connected to the voltage source, and the other end is connected to the collector of Q1; one end of the resistor R17 is connected to the collector of Q1, and the other end is connected to one end of the resistor R18; an adjustable voltage is generated at the positions of the resistors R15 and R17, and the voltage value is determined by the duty cycle of the PWM waveform signal; the other end of the resistor R18 is connected to the negative input terminal of the comparator operational amplifier U3A; one end of the capacitor C30 is connected between the resistors R17 and R18, and the other end is grounded; one end of the capacitor C31 is connected between R18 and the negative input terminal of U3A, and the other end is grounded; R17, R18, C30, and C31 form a π-type filter circuit; one end of the pull-down resistor R23 is connected between the capacitor C31 and the negative input terminal of U3A, and the other end is grounded; one end of the pull-down resistor R25 is connected to the base of Q1, and the other end is grounded; the MCU controls the voltage value at the inverting input terminal of U3A by changing the duty cycle of the waveform output by the IO port. The non-inverting input terminal of U3A is connected to the OCP_AOUT collected and output by the current monitoring unit; the capacitor C28 is connected between the positive voltage power supply terminal of U3A and the ground and is used for power supply filtering; one end of the pull-up resistor R16 is connected between the output terminal of U3A and one end of the resistor R19, and the other end is connected to another voltage source and is used to provide a high-level voltage for the output; the other end of the current-limiting resistor R19 outputs OCP_Interrupt, and the OCP_Interrupt is output to the IO port of the MCU and the exception control unit.

[0012] Further, the OVP operational amplifier comparator specifically includes: PWM_OVP is connected to the IO port of the MCU and is used to receive the PWM waveform signal output by the MCU. The other end of PWM_OVP is connected to the base of the triode Q3 and is used to control the rapid conduction and cut-off of the triode Q3; the VDD_8V pull-up voltage is used to provide a voltage source for Q3, and the emitter of Q3 is grounded; one end of the resistor R29 is connected to the voltage source, and the other end is connected to the collector of Q3; one end of the resistor R31 is connected to the collector of Q3, and the other end is connected to one end of the resistor R32; an adjustable voltage is generated at the resistors R29 and R31, and the voltage value is determined by the duty cycle of the PWM waveform signal; the other end of the resistor R32 is connected to the negative input terminal of the comparison operational amplifier U3B; one end of the capacitor C32 is connected between the resistors R31 and R32, and the other end is grounded; one end of the capacitor C33 is connected between R32 and the negative input terminal of U3B, and the other end is grounded; R31, R32, C32, and C33 form a π-type filter circuit; one end of the pull-down resistor R35 is connected between the capacitor C33 and the negative input terminal of U3B, and the other end is grounded; one end of the pull-down resistor R36 is connected to the base of Q3, and the other end is grounded; the MCU controls the voltage value at the inverting input terminal of U3B by changing the duty cycle of the waveform output by the IO port. The non-inverting input terminal of U3B is connected to the OVP_AOUT collected and output by the voltage monitoring unit; one end of the pull-up resistor R30 is connected between the output terminal of U3B and one end of the resistor R33, and the other end is connected to another voltage source and is used to provide a high-level voltage for the output; the other end of the current-limiting resistor R33 outputs OVP_Interrupt, and the OVP_Interrupt is output to the IO port of the MCU and the exception control unit.

[0013] Further, the sensor circuit specifically includes a temperature detection, a light detection, and a tipping detection sensor circuit;

[0014] Among them, the temperature detection sensor circuit includes a temperature detection sensor RP1, which exhibits different resistance values at different ambient temperatures. After being divided by R1, the 11th pin of the MCU detects different voltages and then calculates the ambient temperature through a formula;

[0015] The light detection sensor circuit includes a light detection sensor RL1, which exhibits different resistance values under different light conditions. After being divided by R8, the 7th pin of the MCU detects different voltages and then calculates the ambient light intensity through a formula;

[0016] The tilting detection sensor circuit includes a tilting sensor R3 for detecting whether the device is tilted to prevent dust contamination or optical path deviation. R3 is a hollow-sealed metal tube with a welding leg at each end, one is gold-colored and the other is silver-colored, and there are two steel balls inside. When the steel balls roll to the gold end, the metal tube conducts; when they roll to the silver end, the metal tube opens. After voltage division with R2 and combined with the voltage source VIN, different level states are detected at pin 6 of the MCU to detect the placement state of the device.

[0017] Furthermore, the MCU specifically includes 32 pins. Pins 1, 5, and 17 are respectively connected to a voltage source. One ends of capacitors C43, C46, and C47 are respectively connected between pins 1, 5, and 17 and the voltage source, and the other ends of C43, C46, and C47 are all grounded. One end of a capacitor C44 is also connected between pin 1 and C43, and the other end of C44 is grounded. C43, C44, C46, and C47 are used for power filtering of the MCU; Pins 16 and 32 are grounded; Pin 31 is connected to a BOOT circuit. The BOOT circuit includes resistors R38 and R39 connected in series. The other end of R38 is connected to the voltage source, and the other end of R39 is grounded. Pin 31 is connected between R38 and R39 and is used for level control during program burning; U10 is a monitoring and reset chip, including 5 pins. Pin 1 is connected to pin 4 of the MCU and is automatically reset when powered on. At the same time, a manual reset circuit is designed. Pin 3 is connected to one end of a switch SW1, and the other end of SW1 is grounded. It is controlled by the SW1 touch switch. One end of a capacitor C45 is connected to pin 3 of U10, and the other end is connected to the other end of SW1. C45 is used for jitter waveform filtering; Pin 5 of U10 is connected to the voltage source, and pin 2 is grounded. A capacitor C42 is connected between pin 5 and pin 2, and C42 is used for power filtering of U10; The oscillation signal OSC_IN is input to pin 2 of the MCU, and the oscillation signal OSC_OUT is output from pin 3; Pins 26 - 30 are short-circuited; Pins 14 and 15 of the MCU are overcurrent and overvoltage interruption trigger ports. Pin 14 is connected to OCP_Interrupt output by the OCP operational amplifier comparator, and pin 15 is connected to OVP_Interrupt output by the OVP operational amplifier comparator; Pins 23 and 24 of the MCU are respectively connected to pins 2 and 3 of a 4X1 pin header J3 for program burning. Pin 1 of the 4X1 pin header J3 is connected to the voltage source, and pin 4 of the 4X1 pin header J3 is grounded; Pins 6, 7, and 11 of the MCU are respectively connected to a tilt detection, light detection, and temperature detection sensor circuit. Pins 8 and 9 are 485 debugging ports. Pin 10 is an external start-up control signal input and reception port. Pin 12 is a watchdog signal output, which is given to the monitoring and reset chip. Pins 13 and 18 are PWM waveform output ports and are used for the OCP operational amplifier comparator and the OVP operational amplifier comparator. Pins 19 and 20 are timer signal ports and are used to control the generation of the Timer_OUT signal. Pin 21 is the output of the Alert_OUT alarm signal. Pin 25 is the direct output port of the Timer_OUT signal. Pin 22 is connected to a light-emitting diode LED2 or LED1. LED2 is used for program debugging, and LED1 is a power indicator lamp.

[0018] Further, the voltage regulating unit specifically includes: one end of the filter capacitor C26 is connected to the voltage VTTC divided by the potentiometer, and the other end is grounded; one end of the voltage dividing resistor R94 is connected between one end of C26 and the voltage VTTC, the other end of R94 is connected in series with one end of the voltage dividing resistor R95, and the other end of the R95 is grounded; one end of the filter capacitor C22 is connected between the series resistors R94 and R95, and the other end is grounded; the operational amplifier U4A together with R27 and C21 form an operational amplifier proportional integral circuit. The resistor R27 and the capacitor C21 are connected in series in the negative feedback circuit of U4A, and the 2nd pin of the negative input terminal of U4A is connected to the 1st pin of the output terminal;

[0019] One end of R93 is connected to one end of C22. One path of the voltage at the other end of R93 is sent to the negative input terminal of U4A, and the other path is sent to the positive input terminal of U4A through the diode D14; one end of R96 is the acquisition point of the transformer output voltage, and this voltage is sent to the positive input terminal of U4A. When the voltage at the 3rd pin of the positive input terminal of U4A changes, through the operational amplifier proportional integral circuit, the voltage value at the output terminal of U4A will change accordingly; the positive electrode of the diode D15 is connected to the 3rd pin of U4A, and the negative electrode is connected to the other end of the R93. D14 and D15 are diodes used to limit the common-mode input voltage range of the operational amplifier and serve as an unloading path to avoid damaging the operational amplifier; the positive electrode of the zener diode D13 is grounded, and the negative electrode is connected to the other end of the R93; one power supply terminal of U4A is connected to the positive voltage, and the other power supply terminal is grounded; the power supply filter capacitors C19 and C17 are connected in parallel to the positive power supply terminal of U4A, and the other ends of the C19 and C17 are both grounded; a current limiting resistor R92 is connected in series at the output terminal of U4A, and the other end of the R92 is connected to the base of the PNP transistor Q6; one end of the pull-down resistor R91 is connected between the other end of the R92 and the base of Q6, and the other end is grounded; the emitter of the Q6 is grounded, and the collector of the Q6 is connected to the FB pin of the flyback switching regulator chip U3. Inside U3, the FB pin is connected to the output terminal of an error amplifier and also to the in-phase input terminal of the PWM generator. The in-phase terminal of the error amplifier is the reference voltage, the anti-phase terminal is grounded, and the output terminal is the positive saturation voltage. The output terminal of the error amplifier has a certain internal resistance. When the current in the CE path of Q6 changes, the voltage at the FB pin will fluctuate dynamically and is sent into the in-phase input terminal of the PWM generator, affecting the output duty cycle of the flyback switching regulator chip U3, and then affecting the voltage value at the output terminal of the transformer.

[0020] Compared with the prior art, the flashing xenon lamp circuit device provided by this application includes a detection and protection module, such as the detection of voltage and current in the circuit, the detection of light, temperature when the discharge lamp emits light, and the detection of the device's inclination; the circuit includes an abnormal cut-off circuit, which can reduce potential safety hazards; the circuit includes an MCU regulation and communication circuit, with better triggering flexibility; the circuit is targeted at the PWM regulation unit, and can perform precise and flexible feedback regulation, and is easy to control the voltage value and waveform stability excited by the transformer.

[0021] Flashing xenon lamps are of great significance in multiple fields, and their applications are extensive and diverse. This application provides a flashing xenon lamp circuit device from the perspectives of being more convenient, efficient, flexible, and safe, which can extend the service life of the xenon lamp device, improve the technical level of various applications, and promote the progress and development of related industries. Brief Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of the voltage monitoring unit;

[0023] Figure 2 It is a schematic structural diagram of the current monitoring unit;

[0024] Figure 3 It is a schematic structural diagram of the OCP operational amplifier comparator;

[0025] Figure 4 It is a schematic structural diagram of the OVP operational amplifier comparator;

[0026] Figure 5 It is a schematic structural diagram of the abnormal control unit;

[0027] Figure 6 It is a schematic structural diagram of the transformer;

[0028] Figure 7 It is a schematic structural diagram of the sensor circuit;

[0029] Figure 8 It is a schematic structural diagram of the MCU;

[0030] Figure 9 It is a schematic structural diagram of the voltage regulation unit;

[0031] Figure 10 It is a schematic structural diagram of the flyback switching regulator chip U3;

[0032] Figure 11 It is the overall circuit diagram of the flashing xenon lamp circuit device provided by the embodiment of the present invention. Detailed Embodiments

[0033] To enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention, so as to more clearly understand the purpose, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not a limitation on the scope of the present invention, but only to illustrate the essential spirit of the technical solutions of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0034] Unless the context requires otherwise, throughout the specification and claims, the words "comprise" and its variations, such as "comprising" and "having", shall be construed in an open, inclusive sense, i.e., construed as "including, but not limited to".

[0035] References throughout the specification to "one embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of "in one embodiment" or "in an embodiment" throughout the specification are not necessarily all referring to the same embodiment. Additionally, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0036] As used in this specification and the appended claims, the singular forms "a" and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally used in its inclusive sense of "and / or" unless the context clearly dictates otherwise.

[0037] In the following description, in order to clearly show the structure and working mode of the present invention, many directional terms will be used for description. However, words such as "front", "rear", "left", "right", "outer", "inner", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be construed as limiting terms.

[0038] The following specifically describes the implementation details of the embodiments of the present invention with reference to the accompanying drawings. The following content is only the implementation details provided for convenient understanding and is not necessary for implementing this solution.

[0039] To solve the disadvantages of the existing technology and achieve the invention purpose, the present invention provides a flashing xenon lamp circuit device, which includes: a xenon lamp, an RS232 interface unit, an MCU, a starting control unit, a starting circuit, a PWM generating unit, a transformer, a capacitor energy storage unit, a voltage regulating unit, a sensor circuit, an energy discharging unit, a voltage monitoring unit, a current monitoring unit, an OCP operational amplifier comparator, an OVP operational amplifier comparator, and an abnormal control unit; wherein, the sensor circuit includes a light detection, a temperature detection, and a tipping detection sensor circuit.

[0040] Next, each module of the flashing xenon lamp circuit device will be specifically introduced with reference to the accompanying drawings.

[0041] In some embodiments, the process of the flashing xenon lamp lighting up is divided into different stages. A very high voltage is required during ionization, and there will be a certain value of current after stabilization. In order to extend the service life of the xenon lamp device as much as possible and for safe use, the circuit device is provided with an overvoltage detection protection circuit and an overcurrent detection protection circuit. Among them, the overvoltage detection protection circuit includes Figure 1 the voltage monitoring unit and Figure 4 the OVP operational amplifier comparator, and the overcurrent detection protection circuit includes Figure 2 the current monitoring unit and Figure 3 the OCP operational amplifier comparator.

[0042] As Figure 1 shown is the structural schematic diagram of the voltage monitoring unit. V_600V is the output voltage after the transformer conversion and rectification. After being divided by voltage through 6 resistors of 640K ohms and one resistor of 10K ohms, a voltage of about 2.9V will be generated at the connection of R33 and R37. The operational amplifier U5 is used for voltage following here, and the capacitor C24 is used for power supply filtering. The 2.9V voltage is followed to the OVP_AOUT and output to the OVP operational amplifier comparator, as Figure 4 shown.

[0043] As Figure 2As shown, the current monitoring unit. J1 is the schematic package of the flashing xenon lamp L4642, with a total of 9 pins. Pin 9 is the cathode, and R4 is connected here for the sampling resistor. When the flashing xenon lamp is working, there is a certain value of current in the path where the sampling resistor R4 is located. According to Ohm's law, a certain value of voltage drop will be generated across R4. U1 is a precision instrumentation amplifier, which is used to collect the voltage value across R4 and amplify it according to the design. Here, it is amplified 1001 times. Exemplarily, if the voltage drop across R4 is 1uV, then the voltage value of 1001uV will be output at OCP_AOUT. U2 is used here for voltage following, following the voltage obtained by dividing VDD_3V3 through R12 and R13 to pin 5 of U1, which is used as the reference voltage when U1 is working. Capacitors C22 and C18 are used for power supply filtering. R10 is the external gain resistor of U1. R9 and C19 (as well as R11 and C21) form a low-pass filter, which is used to provide good RFI suppression for the circuit. C20 is the common-mode rejection capacitor. OCP_AOUT is output to the OCP operational amplifier comparator, as Figure 3 .

[0044] such as Figure 3 , 4 shown are the OCP operational amplifier comparator and the OVP operational amplifier comparator respectively. PWM_OCP and PWM_OVP are connected to the IO ports of the single-chip microcomputer (see Figure 8 ), which are used to receive the PWM waveform signals output by the single-chip microcomputer to control the rapid conduction and turn-off of Q1 and Q3. The VDD_8V pull-up voltage is used to provide a voltage source. Under the control described above, the circuit in the above figure will generate an adjustable voltage at R15 and R17 (R29 and R31). The specific voltage value is determined by the duty cycle of the PWM wave. R17, R18, C30, C31 (R31, R32, C32, C33) are π-type filter circuits. R23 and R25 are pull-down resistors. Through such a circuit, the single-chip microcomputer can control the voltage values at the inverting input terminals of the comparator operational amplifier U3A and the comparator operational amplifier U3B by changing the duty cycle of the waveform output by the IO port. OCP_AOUT and OVP_AOUT are Figure 2 and Figure 1 the acquisition outputs in, C28 is used for power supply filtering. R16 and R30 are pull-up resistors, which are used to provide a high-level voltage for the output. R19 and R33 are current-limiting resistors.

[0045] The functions of the overvoltage detection protection circuit and the overcurrent detection protection circuit are to set the thresholds of overvoltage protection and overcurrent protection. When the voltage and current during the operation of the flashing xenon lamp exceed the set thresholds, the levels of U3A and U3B will flip, and output to the IO port of the single-chip microcomputer (see Figure 8 ) and the abnormal control unit (see Figure 5 ).

[0046] In some embodiments, such as Figure 5 shown, the abnormal control unit is used to skip the code control of the microcontroller MCU. When the voltage or current is abnormal, the input path of the transformer is directly disconnected through the hardware circuit, so as to cut off the power supply of the flashing xenon lamp.

[0047] U6 and U7 are two identical OR gate logic integrated circuits. When overvoltage or overcurrent occurs, or both occur simultaneously, the 4th pin of U6 outputs a high level, otherwise it outputs a low level, and is input to the input terminal (the 1st pin) of the next OR gate U7; the 2nd pin of U7 is another input terminal, connected to Timer_OUT. This signal is the trigger signal of the subsequent starting circuit, which is directly output by the microcontroller (see Figure 8 ), or can also be output by the timer circuit. This is a square wave signal. Since the 1st pin of U7 receives a high level in the case of overcurrent or overvoltage, no matter whether the square wave signal is high level or low level at this time, the 4th pin of U7 outputs a high level, that is, the Alert_Ctr (alarm control) signal. As Figure 6 shown in the transformer circuit, it is connected to the base of a PNP type triode. When Alert_Ctr is at a high level, Q3 conducts. Q2 is an NMOS transistor. At this time, the voltage between the gate and the source of Q2 is not enough to make Q2 conduct, and the input terminal of the transformer shows an open circuit and the output is cut off.

[0048] When there is no overvoltage or overcurrent, the 4th pin of U6 outputs a low level. At this time, the output of U7 (Alert_Ctr) is exactly the same as the level of Timer_OUT. This signal is the trigger signal of the subsequent starting circuit, enabled by a high level. At the same time, when at a high level, the transformer conversion output is turned off. Generally speaking, the lighting of the flashing xenon lamp needs to be completed in two parts: capacitor charging and discharge ionization. When Timer_OUT is at a low level, the transformer outputs VCC6 to charge the subsequent capacitor, and at the same time triggers the optocoupler to turn off; when Timer_OUT is at a high level, the transformer conversion output is cut off, the optocoupler is triggered to conduct, and the subsequent capacitor starts to discharge, generating a kilovolt-level voltage through the trigger coil to ionize the xenon gas and emit light.

[0049] In Figure 6 , R11, R12 and R16 are used for current limiting, R15 is a pull-down resistor, D2, D3, D4, D5 are used for rectification, and D6 and D7 are used for voltage stabilization.

[0050] In some embodiments, considering that this solution may be used in various occasions, a set of sensor circuits is designed in the xenon lamp circuit device to detect the environmental parameters and usage status around the xenon lamp. As Figure 7As shown, the temperature detection, light detection, and tipping detection sensor circuits. Among them, RP1 is the temperature detection sensor, which exhibits different resistance values at different ambient temperatures. After voltage division with R1, the PA5 port (pin 11) of the single-chip microcomputer detects different voltages and then calculates the ambient temperature through a formula.

[0051] RL1 is the light detection sensor, and its working principle is similar to that of the temperature detection sensor. It exhibits different resistance values under different light conditions. After voltage division with R8, the PA1 port (pin 7) of the single-chip microcomputer detects different voltages and then calculates the ambient light intensity through a formula.

[0052] R3 is the tipping sensor, which is used to detect whether the substrate (or product) is tipped over to prevent dust contamination or optical path deviation. It is a hollow-sealed metal tube with a welding leg at each end, one is gold and the other is silver, and there are two steel balls inside. When the steel balls roll to the gold end, the tube shows conduction, and when they roll to the silver end, the tube shows an open circuit. It is paired with R2 and combined with VIN. The PA0 port (pin 6) of the single-chip microcomputer will detect different level states, and the PCB layout can be planned according to the product use environment and sensor characteristics to further detect the product placement state.

[0053] In some embodiments, in order to more flexibly control the excitation frequency of the xenon lamp, read the working information, and control other circuits, the xenon lamp circuit is also designed with a (single-chip microcomputer) controller unit MCU, and the circuit is as Figure 8 shown. The working voltage is 3.3V. R38 and R39 are the BOOT circuits for level control during program burning; U10 is the monitoring and reset chip, which is automatically reset when powered on. At the same time, a manual reset circuit is designed and controlled by the SW1 touch switch. C45 is used for jitter waveform filtering, C42 is used for U10 power supply filtering, and C43, C44, C46, and C47 are used for single-chip microcomputer power supply filtering; J3 is a 4X1 row pin for program burning, using pins 23 and 24; LED2 and LED1 are light-emitting diodes, the former is used for program debugging, and the latter is the power indicator; pins 14 and 15 are the overcurrent and overvoltage interruption trigger ports; pins 8 and 9 are the 485 debugging ports; pin 10 is the external starting control signal input receiving port; pin 12 is the watchdog signal output, given to the monitoring and reset chip; pins 13 and 18 are the PWM waveform output ports for the OCP operational amplifier comparator and OVP operational amplifier comparator; pins 19 and 20 are the timer signal ports for controlling the generation of the Timer_OUT signal; pin 21 is the output of the Alert_OUT alarm signal; pin 25 is the direct output of the Timer_OUT signal.

[0054] In some embodiments, the high-voltage value that activates the xenon lamp has a great influence on the operating state of the xenon lamp, including the start-up stability, light intensity, spectrum, service life, energy conversion efficiency, stability and consistency of the maintained output, and safety performance, etc. Therefore, this solution also includes a voltage regulating unit for regulating the amplitude and waveform stability of the output voltage at the rear stage of the transformer. The circuit is as Figure 9 shown.

[0055] As Figure 9 shown, the voltage regulating unit is shown. VTTC is the voltage divided by the potentiometer, with a range of 1V3 to 2V3. C26 is a filter capacitor, C19 and C17 are power supply filter capacitors, D14 and D15 are diodes used to limit the common-mode input voltage range of the operational amplifier and serve as an unloading path to avoid damaging the operational amplifier; R94 and R95 are voltage-dividing resistors, taking 33 / 34 of the VTTC voltage and serving as a reference voltage; C22 is a filter capacitor, D13 is a voltage-regulating diode; U4A together with R27 and C21 form an operational amplifier proportional-integral circuit. The right side of R96 is the acquisition point of the transformer output voltage (at about 2.9V voltage). These two voltages are respectively sent to the inverting output and non-inverting output terminals of the operational amplifier. When the voltage at pin 3 of the operational amplifier changes (that is, when the voltage value at the transformer output terminal changes), through the proportional-integral circuit, the voltage value at the output terminal of the operational amplifier will change accordingly. R92 is a current-limiting resistor, R91 is a pull-down resistor, which in turn affects the current between the base and emitter of Q6 (a PNP transistor). Q6 operates in the amplification region, and the change in the current between the BE will affect the current between the CE. The collector of Q6 is connected to the FB pin of the flyback switching regulator chip U3. As Figure 10 is the internal block diagram of U3. Inside U3, the FB pin is connected to the output terminal of an error amplifier and at the same time connected to the non-inverting input terminal of the PWM generator. The non-inverting terminal of this error amplifier is a reference voltage of 0.52V, and the inverting terminal is grounded, so the output terminal is close to the positive saturation voltage. The output terminal of the error amplifier has a certain internal resistance. When the current in the CE path of Q6 changes, the voltage at the FB point will fluctuate dynamically and is sent into the non-inverting input terminal of the PWM generator, affecting the output duty cycle of the flyback switching regulator chip U3, and then affecting the voltage value at the transformer output terminal.

[0056] All in all, when the voltage at pin 3 of the operational amplifier changes, the FB pin shows different voltage values, which in turn affects the parameter input of the PWM generator, adjusts the output duty cycle, and ultimately aims to keep the output terminal of the transformer within a set range.

[0057] Another significance of this circuit is that the reference voltage is adjustable, so that the output voltage value at the transformer output terminal can be adjusted flexibly.

[0058] The overall circuit of the flashing xenon lamp circuit device is as Figure 11 shown.

[0059] The working principle of this circuit is as follows:

[0060] The RS232 interface unit is the only unit that interacts with the outside world. It defines the output of fault alarm signals, the input of starting control signals, 485 communication, and the input pins of 12V power supply. The fault alarm signal is used to convey abnormal information to the outside world and can be customized by the user for external devices; the starting control signal is a square wave of a certain number of cycles, which can be output by the MCU to the starting control unit or input by the user from the outside; 485 communication is used for the device to interact with the outside world; the 12V power supply is used to provide energy supply for all operating units of the device, and through the DCDC and LDO unit topologies, 3.3V, 8V, and adjustable output VTTC power supplies are derived to supply different operating units respectively.

[0061] When the power supply is normal, the PWM generating unit outputs a high-frequency regulated control signal, converts the input end of the step-up transformer into an AC signal, and outputs an AC high voltage of 600V at the output end through the transformer. Then it is rectified into a DC signal by a diode to store energy in a large capacitor as the main discharge voltage, which is used to provide continuous energy for the operation of the xenon lamp. And a VCC6 DC voltage is output through voltage division and rectification. The voltage value at the output end of the step-up transformer can be controlled by the voltage regulating unit to keep it stable within a certain range.

[0062] The MCU or the outside world can output a signal to control the optoelectronic relay, and a square wave signal is output through the timer module. This square wave signal is applied to the starting control unit. The working principle of the starting circuit is as follows: in the low-level state, the capacitor is charged by VCC6, and in the high-level state, the capacitor starts to discharge, and an ultra-high voltage starting voltage is output through the trigger coil and delivered to the xenon lamp to generate a complete discharge arc; at the same time, this square wave signal is applied to the gate of the transistor at the rear stage of the PWM output through the starting control unit to control the generation of the AC signal at the input end of the step-up transformer, so that the capacitor energy storage unit performs intermittent charging to achieve the purpose of flashing.

[0063] The MCU unit is equipped with light detection, temperature detection, and tilting detection sensor circuits, which are used to detect the environmental parameters during the operation of the xenon lamp and flexibly adjust the working state of the product according to the usage scenario of the product.

[0064] When the xenon lamp is not working, the voltage of the capacitor energy storage unit is discharged to the ground through the energy discharge unit to avoid potential energy hazards.

[0065] During the operation of the xenon lamp, the voltage and current in the circuit are detected by the voltage and current monitoring unit. The MCU can customize the voltage and current thresholds, compare them through the OCP and OVP operational amplifiers comparators, output logic levels, and integrate the level logic through the abnormal control unit. When the voltage or current is abnormal, the path of the PWM generation unit is disconnected, causing the output of the boost transformer to fail, so as to achieve the purpose of protection.

[0066] The flashing xenon lamp circuit device of the present application is of great significance in multiple fields, and its applications are extensive and diverse. The present invention aims to provide a flashing xenon lamp circuit device from a more convenient, efficient, flexible, and safe perspective. This device can extend the service life of the xenon lamp device, improve the technical level of various applications, and promote the progress and development of related industries.

[0067] Although the present invention has been described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, those of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions should be within the scope of the present invention. Or any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A flashing xenon lamp circuit device, characterized in that, The device includes: an MCU, a transformer circuit, a voltage regulation unit, a sensor circuit, a voltage monitoring unit, a current monitoring unit, an OCP operational amplifier comparator, an OVP operational amplifier comparator, and an abnormal control unit; Among them, the voltage monitoring unit monitors the output voltage V1 after being converted and rectified by the transformer circuit. The current monitoring unit includes a sampling resistor between the cathode pin of the xenon lamp and the ground. The output of the voltage monitoring unit is connected to the input of the OVP operational amplifier comparator, and the output of the current monitoring unit is connected to the input of the OCP operational amplifier comparator; The abnormal control unit specifically includes: U6 and U7 are two OR gate logic integrated circuits. Both the OVP_Interrupt output by the OVP operational amplifier comparator and the OCP_Interrupt output by the OCP operational amplifier comparator are input to U6. When overvoltage or overcurrent occurs, or both occur simultaneously, U6 outputs a high level, otherwise it outputs a low level. The high level or low level is input to the first input pin of the next OR gate U7. The second input pin of U7 is connected to the Timer_OUT square wave signal, which is the trigger signal of the subsequent starting circuit and is directly output by the MCU. When the first input pin of U7 receives a high level in the case of overcurrent or overvoltage, regardless of whether the Timer_OUT square wave signal is high or low, the Alert_Ctr signal output by U7 is high level; The transformer circuit specifically includes: The Alert_Ctr signal is output to the base of a PNP transistor through a current-limiting resistor R12. The collector of the PNP transistor is connected between the current-limiting resistor R11 and the gate of the NMOS transistor Q2. The emitter of the PNP transistor is grounded. When Alert_Ctr is high level, the PNP transistor conducts; The gate of the NMOS transistor Q2 is connected to a current-limiting resistor R11, the drain of Q2 is connected to a transformer, and the source is grounded through a current-limiting resistor R16; When the voltage between the gate and source of the NMOS transistor Q2 is not sufficient to turn on Q2, the input end of the transformer appears open and the output is cut off; One input pin of the transformer is connected to the voltage VIN; The first output pin of the transformer outputs the main discharge voltage V_600V through two rectifier diodes D2 and D3 and two protection diodes D6 and D7. When there is no overvoltage or overcurrent, the output Alert_Ctr of U7 is the level of Timer_OUT. This signal is high level enabled. The flashing of the xenon lamp requires the charging and discharging ionization of the capacitor. When Timer_OUT is low level, the second output pin of the transformer outputs VCC6 through two rectifier diodes D4 and D5 to charge the subsequent capacitor, and at the same time triggers the optocoupler to turn off; When Timer_OUT is high level, the output of the transformer circuit is cut off, triggering the optocoupler to conduct, and the subsequent capacitor starts to discharge, generating a kilovolt-level voltage through the trigger coil to ionize the xenon gas to emit light.

2. The flashing xenon lamp circuit device according to claim 1, characterized in that, The specific composition of the current monitoring unit is as follows: J1 is the schematic diagram package of the flashing xenon lamp L4642, with a total of 9 pins. Among them, pin 9 is the cathode, and pin 9 is grounded through the sampling resistor R4. When the flashing xenon lamp is working, the positive and negative input terminals of the precision instrumentation amplifier U1 are connected to both ends of the sampling resistor R4 to collect the voltage value across R4 and amplify the collected voltage value; U2 is used for voltage following, and the voltage obtained by dividing the power supply voltage VDD_3V3 of U2 through the resistors R12 and R13 is followed to pin 5 of U1 as the reference voltage for U1 during operation; one ends of the capacitors C22 and C18 are respectively connected to the power supply terminals of U2 and U1, and the other ends are grounded for power supply filtering; the other two input terminals of U1 are connected through the external gain resistor R10; R9 is connected between the negative input terminal of U1 and one end of the resistor R4, one end of the capacitor C19 is connected between the negative input terminal of U1 and one end of the resistor R9, and the other end is grounded. R11 is connected between the positive input terminal of U1 and the other end of the resistor R4, one end of the capacitor C21 is connected between the positive input terminal of U1 and one end of the resistor R11, and the other end is grounded. The R9, C19, R11, and C21 form a low-pass filter to provide RFI suppression for the circuit; one end of the C19 is connected to one end of the C21 through the common-mode rejection capacitor C20; the output OCP_AOUT is sent to the OCP operational amplifier comparator.

3. The flashing xenon lamp circuit device according to claim 2, characterized in that, The specific OCP operational amplifier comparator includes: PWM_OCP is connected to the IO port of the MCU and is used to receive the PWM waveform signal output by the MCU. The other end of PWM_OCP is connected to the base of the triode Q1 and is used to control the fast conduction and turn-off of the triode Q1; the VDD_8V pull-up voltage is used to provide a voltage source for Q1, and the emitter of Q1 is grounded; one end of the resistor R15 is connected to the voltage source, and the other end is connected to the collector of Q1; one end of the resistor R17 is connected to the collector of Q1, and the other end is connected to one end of the resistor R18; an adjustable voltage is generated at the positions of the resistors R15 and R17, and the voltage value is determined by the duty cycle of the PWM waveform signal; the other end of the resistor R18 is connected to the negative input terminal of the comparison operational amplifier U3A; one end of the capacitor C30 is connected between the resistors R17 and R18, and the other end is grounded; one end of the capacitor C31 is connected between R18 and the negative input terminal of U3A, and the other end is grounded; R17, R18, C30, and C31 form a π-type filter circuit; one end of the pull-down resistor R23 is connected between the capacitor C31 and the negative input terminal of U3A, and the other end is grounded; one end of the pull-down resistor R25 is connected to the base of Q1, and the other end is grounded; the MCU controls the voltage value of the inverting input terminal of U3A by changing the duty cycle of the waveform output by the IO port. The non-inverting input terminal of U3A is connected to the OCP_AOUT collected and output by the current monitoring unit; the capacitor C28 is connected between the positive voltage power supply terminal of U3A and the ground and is used for power supply filtering; one end of the pull-up resistor R16 is connected between the output terminal of U3A and one end of the resistor R19, and the other end is connected to another voltage source and is used to provide a high-level voltage for the output; the other end of the current-limiting resistor R19 outputs OCP_Interrupt, and the OCP_Interrupt is output to the IO port of the MCU and the abnormal control unit.

4. A flashing xenon lamp circuit device according to claim 1, characterized in that, The OVP operational amplifier comparator specifically includes: PWM_OVP is connected to the IO port of the MCU and is used to receive the PWM waveform signal output by the MCU. The other end of PWM_OVP is connected to the base of the triode Q3 and is used to control the quick conduction and turn-off of the triode Q3; the VDD_8V pull-up voltage is used to provide a voltage source for Q3, and the emitter of Q3 is grounded; one end of the resistor R29 is connected to the voltage source, and the other end is connected to the collector of Q3; one end of the resistor R31 is connected to the collector of Q3, and the other end is connected to one end of the resistor R32; an adjustable voltage is generated at the resistors R29 and R31, and the voltage value is determined by the duty cycle of the PWM waveform signal; the other end of the resistor R32 is connected to the negative input terminal of the comparator operational amplifier U3B; one end of the capacitor C32 is connected between the resistors R31 and R32, and the other end is grounded; one end of the capacitor C33 is connected between R32 and the negative input terminal of U3B, and the other end is grounded; R31, R32, C32, and C33 form a π-type filter circuit; one end of the pull-down resistor R35 is connected between the capacitor C33 and the negative input terminal of U3B, and the other end is grounded; one end of the pull-down resistor R36 is connected to the base of Q3, and the other end is grounded; the MCU controls the voltage value at the inverting input terminal of U3B by changing the duty cycle of the waveform output by the IO port. The non-inverting input terminal of U3B is connected to OVP_AOUT collected and output by the voltage monitoring unit; one end of the pull-up resistor R30 is connected between the output terminal of U3B and one end of the resistor R33, and the other end is connected to another voltage source and is used to provide a high-level voltage for the output; the other end of the current-limiting resistor R33 outputs OVP_Interrupt, and the OVP_Interrupt is output to the IO port of the MCU and the exception control unit.

5. The flash xenon lamp circuit device according to claim 1, characterized in that, The sensor circuit specifically includes a temperature detection, a light detection, and a tilt detection sensor circuit; Among them, the temperature detection sensor circuit includes the temperature detection sensor RP1, which shows different resistance values at different ambient temperatures. After being divided by voltage with R1, the 11th pin of the MCU detects different voltages and then calculates the ambient temperature through a formula; The light detection sensor circuit includes the light detection sensor RL1, which shows different resistance values under different light conditions. After being divided by voltage with R8, the 7th pin of the MCU detects different voltages and then calculates the ambient light intensity through a formula; The tilt detection sensor circuit includes the tilt sensor R3, which is used to detect whether the device is tilted to prevent dust contamination or optical path deviation. The R3 is a hollow-sealed metal tube with a welding foot at each end, one is gold-colored and the other is silver-colored, and there are two steel balls inside. When the steel balls roll to the gold-colored end, the metal tube conducts, and when they roll to the silver-colored end, the metal tube opens. After being divided by voltage with R2 and combined with the voltage source VIN, the 6th pin of the MCU detects different level states and is used to detect the placement state of the device.

6. The flashing xenon lamp circuit device according to claim 5, characterized in that, The MCU specifically includes 32 pins. Pins 1, 5, and 17 are respectively connected to the voltage source. One ends of capacitors C43, C46, and C47 are respectively connected between pins 1, 5, and 17 and the voltage source, and the other ends of C43, C46, and C47 are all grounded. One end of capacitor C44 is also connected between pin 1 and C43, and the other end of C44 is grounded. C43, C44, C46, and C47 are used for MCU power supply filtering; Pins 16 and 32 are grounded; Pin 31 is connected to the BOOT circuit. The BOOT circuit includes resistors R38 and R39 connected in series. The other end of R38 is connected to the voltage source, and the other end of R39 is grounded. Pin 31 is connected between R38 and R39 and is used for level control during program burning; U10 is a monitoring and reset chip, including 5 pins. Pin 1 is connected to pin 4 of the MCU and is automatically reset upon power-on. At the same time, a manual reset circuit is designed. Pin 3 is connected to one end of switch SW1, and the other end of SW1 is grounded. It is controlled by the SW1 touch switch. One end of capacitor C45 is connected to pin 3 of U10, and the other end is connected to the other end of SW1. C45 is used for jitter waveform filtering; Pin 5 of U10 is connected to the voltage source, and pin 2 is grounded. A capacitor C42 is connected between pin 5 and pin 2. C42 is used for U10 power supply filtering; Oscillation signal OSC_IN is input to pin 2 of the MCU, and oscillation signal OSC_OUT is output from pin 3; Pins 26 - 30 are short-circuited; Pins 14 and 15 of the MCU are overcurrent and overvoltage interruption trigger ports. Pin 14 is connected to OCP_Interrupt output by the OCP operational amplifier comparator, and pin 15 is connected to OVP_Interrupt output by the OVP operational amplifier comparator; Pins 23 and 24 of the MCU are respectively connected to pins 2 and 3 of the 4X1 pin header J3 for program burning. Pin 1 of the 4X1 pin header J3 is connected to the voltage source, and pin 4 of the 4X1 pin header J3 is grounded; Pins 6, 7, and 11 of the MCU are respectively connected to the tilt detection, light detection, and temperature detection sensor circuits. Pins 8 and 9 are 485 debugging ports. Pin 10 is an external starting control signal input receiving port. Pin 12 is the watchdog signal output, given to the monitoring and reset chip. Pins 13 and 18 are PWM waveform output ports, used for the OCP operational amplifier comparator and the OVP operational amplifier comparator. Pins 19 and 20 are timer signal ports, used to control the generation of the Timer_OUT signal. Pin 21 is the output of the Alert_OUT alarm signal. Pin 25 is the direct output port of the Timer_OUT signal. Pin 22 is connected to light-emitting diode LED2 or LED1. LED2 is used for program debugging, and LED1 is the power indicator.

7. The flashing xenon lamp circuit device according to claim 1, characterized in that, The voltage regulating unit specifically includes: One end of the filtering capacitor C26 is connected to the voltage VTTC divided by the potentiometer, and the other end is grounded; One end of the voltage dividing resistor R94 is connected between one end of C26 and the voltage VTTC, the other end of R94 is connected in series with one end of the voltage dividing resistor R95, and the other end of the R95 is grounded; One end of the filtering capacitor C22 is connected between the series resistors R94 and R95, and the other end is grounded; The operational amplifier U4A together with R27 and C21 constitutes an operational amplifier proportional-integral circuit. The resistor R27 and the capacitor C21 are connected in series in the negative feedback circuit of U4A, and the 2nd pin of the negative input terminal of U4A is connected to the 1st pin of the output terminal. One end of R93 is connected to one end of C22. One path of the voltage at the other end of R93 is sent to the negative input terminal of U4A, and the other path is sent to the positive input terminal of U4A through the diode D14; One end of R96 is the acquisition point of the transformer output voltage, and this voltage is sent to the positive input terminal of U4A. When the voltage at the 3rd pin of the positive input terminal of the U4A changes, through the operational amplifier proportional-integral circuit, the voltage value at the output terminal of U4A will change accordingly; The positive electrode of the diode D15 is connected to the 3rd pin of U4A, and the negative electrode is connected to the other end of the R93. D14 and D15 are diodes used to limit the common-mode input voltage range of the operational amplifier and serve as an unloading path to avoid damaging the operational amplifier; The positive electrode of the zener diode D13 is grounded, and the negative electrode is connected to the other end of the R93; One power supply terminal of U4A is connected to the positive voltage, and the other power supply terminal is grounded; The power supply filtering capacitors C19 and C17 are connected in parallel to the positive power supply terminal of U4A, and the other ends of the C19 and C17 are both grounded; A current limiting resistor R92 is connected in series at the output terminal of U4A, and the other end of the R92 is connected to the base of the PNP triode Q6; One end of the pull-down resistor R91 is connected between the other end of the R92 and the base of Q6, and the other end is grounded; The emitter of the Q6 is grounded, and the collector of the Q6 is connected to the FB pin of the flyback switching regulator chip U3. Inside U3, the FB pin is connected to the output terminal of an error amplifier and at the same time to the non-inverting input terminal of the PWM generator. The non-inverting terminal of the error amplifier is the reference voltage, the inverting terminal is grounded, and the output terminal is the positive saturation voltage. The output terminal of the error amplifier has a certain internal resistance. When the current in the CE path of Q6 changes, the voltage at the FB pin will fluctuate dynamically and is sent into the non-inverting input terminal of the PWM generator, affecting the output duty cycle of the flyback switching regulator chip U3, and then affecting the voltage value at the output terminal of the transformer.

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