An ultra-wide input voltage power supply and a control method thereof

Abstract

This application provides an ultra-wide input voltage power supply and its control method. The ultra-wide input voltage power supply includes a power input terminal, a rectifier module, a PFC boost control module, and a power output module connected sequentially. A voltage divider comparison control module is connected between the power input terminal and the PFC boost control module, and a dimming control module is connected between the voltage divider comparison control module and the power output module. This ultra-wide input voltage power supply uses the high and low levels output by the voltage divider comparison control module to allow the PFC boost control module to select the boost voltage threshold. The dimming control module then adjusts the voltage threshold and outputs the voltage to the power output module. The voltage output by the power output module can meet the mains voltage input conditions from 90V to 520V, perfectly compatible with two-phase or three-phase mains input conditions, achieving full coverage within the corresponding power range, meeting more market demands and applications, and solving the problem that traditional power supplies cannot directly power industrial electrical products.

Description

Technical Field

[0001] This application belongs to the field of voltage power supply technology, and in particular relates to an ultra-wide input voltage power supply and its control method. Background Technology

[0002] Traditional power supplies typically have an input voltage of 90–264 Vac or 120–347 Vac. Industrial electrical products, however, require a power supply of 480 Vac. Therefore, traditional power supplies cannot power industrial electrical products. This means that using traditional power supplies to power industrial electrical products requires additional transformers to step down the voltage or modifications to the power supply lines to enable normal operation of industrial electrical products, increasing power supply costs and reducing the versatility and practicality of the products. At the same time, because flyback topologies have the advantages of low cost, fewer external components, and suitability for wide voltage input, they are widely used in conventional power supplies in areas with low output current, but they are not suitable for low voltage and high current applications. Summary of the Invention

[0003] One embodiment of this application provides an ultra-wide input voltage power supply and its control method to solve the problem that traditional power supplies cannot directly power industrial electrical products.

[0004] In a first aspect, one embodiment of this application provides an ultra-wide input voltage power supply, including a power input terminal, a rectifier module, a PFC boost control module, a voltage divider comparison control module, a dimming control module, and a power output module. The power input terminal is connected to the input terminal of the rectifier module and the input terminal of the voltage divider comparison control module, respectively. The output terminal of the rectifier module is connected to the input terminal of the PFC boost control module, and the output terminal of the PFC boost control module is connected to the output terminal of the voltage divider comparison control module and the input terminal of the power output module, respectively. The output terminal of the voltage divider comparison control module is connected to the input terminal of the dimming control module, and the output terminal of the dimming control module is connected to the power output module and the PFC boost control module, respectively.

[0005] Optionally, the voltage divider comparison control module includes a first voltage divider submodule and a comparator. The input terminal of the first voltage divider submodule is connected to the power input terminal, and the output terminal of the first voltage divider submodule is connected to the input terminal of the comparator. The output terminal of the comparator is connected to the input terminal of the dimming control module and the PFC boost control module. The first voltage divider submodule includes an eleventh resistor, a twelfth resistor, a sixteenth resistor, and an eighteenth resistor connected in series, and a second capacitor connected in parallel with the eighteenth resistor. The eleventh resistor is connected to the power input terminal through a Zener diode. The first terminal of the eighteenth resistor and the first terminal of the second capacitor are both connected to the input terminal of the comparator. The second terminal of the eighteenth resistor and the second terminal of the second capacitor are both grounded. The output terminal of the comparator is connected to the PFC boost control module through a fourteenth resistor, and the output terminal of the comparator is connected to the input terminal of the dimming control module through a seventeenth resistor.

[0006] Optionally, the PFC boost control module includes a second voltage divider submodule, a PFC main control submodule, and a boost submodule. The input terminal of the second voltage divider submodule is connected to the output terminal of the voltage divider comparison control module, the input terminal of the second voltage divider submodule is connected to the input terminal of the PFC main control submodule, and the output terminal of the PFC main control submodule is connected to the boost submodule. The second voltage divider submodule includes a second switching transistor and a voltage divider resistor assembly. The third terminal of the second switching transistor is connected to the output terminal of the voltage divider comparison control module, the first terminal of the second switching transistor is connected to the voltage divider resistor assembly, the voltage divider resistor assembly is also connected to the PFC main control submodule, and the second terminal of the second switching transistor is grounded. The boost submodule includes a transformer. The input terminal of the transformer is connected to the PFC main control submodule, the output terminal of the transformer is connected to the input terminal of the power output module, and the PFC main control submodule is also connected to the dimming control module.

[0007] Optionally, the dimming control module includes an optocoupler, which includes an optocoupler diode and an optocoupler switch.

[0008] Optionally, the power output module includes a rectifier-filter output submodule and an adjustable output power submodule. The input terminal of the rectifier-filter output submodule is connected to the output terminal of the PFC boost control module, and the output terminal of the rectifier-filter output submodule is connected to the input terminal of the adjustable output power submodule. The adjustable output power submodule and the rectifier-filter output submodule are also connected to the dimming control module. The adjustable output power submodule includes a third switching transistor. The third terminal of the third switching transistor is connected to the dimming control module, the first terminal of the third switching transistor is connected to a first power interface, and the second terminal of the third switching transistor is connected in series with a second electrolytic capacitor and connected to a second power interface.

[0009] The rectifier and filter output submodule includes a 33rd Zener diode and a 6th electrolytic capacitor connected in parallel with the 33rd Zener diode;

[0010] Alternatively, the rectifier and filter output submodule may include a 33rd Zener diode, a 34th Zener diode, a filter inductor, and a 6th electrolytic capacitor. The 33rd Zener diode and the 34th Zener diode are connected in parallel and then connected to the first end of the filter inductor. The second end of the filter inductor is connected to the positive terminal of the 6th electrolytic capacitor. The negative terminal of the 6th electrolytic capacitor is connected to the anode of the 34th Zener diode and the dimming control module, respectively.

[0011] Optionally, the ultra-wide input voltage power supply includes an A / D signal input module connected to the dimming control module.

[0012] Secondly, another embodiment of this application provides a control method for an ultra-wide input voltage power supply, applied to the aforementioned ultra-wide input voltage power supply. The control method includes the following steps:

[0013] Acquire the power voltage data required by the user connected to the power output module and the power supply voltage data input at the power input terminal;

[0014] Based on the power supply voltage data, a PFC boost control module, a voltage divider comparison control module, and a dimming control module are used to perform voltage division, comparison, boosting, and power regulation processing on the power supply voltage data, so that the power output module outputs power that matches the power supply voltage data.

[0015] Optionally, based on the power supply voltage data, a PFC boost control module, a voltage divider comparison control module, and a dimming control module are used to perform voltage division, comparison, boosting, and power regulation processing on the power supply voltage data, so that the power output module outputs a power supply that matches the power supply voltage data, including:

[0016] If the power supply voltage data is less than the first voltage threshold, the power supply voltage data is divided by the first voltage divider submodule of the voltage divider comparison control module to obtain the first voltage divider voltage.

[0017] The first voltage divider is input to the comparator of the voltage divider comparison control module for comparison, and the comparator outputs a low-level signal;

[0018] According to the low-level signal, the second switch in the PFC boost control module is turned off and the power supply voltage data is boosted to the first voltage threshold through its boost submodule.

[0019] The first voltage threshold is adjusted by the resistance value in the second voltage divider submodule of the PFC boost control module, the duty cycle of the optocoupler in the dimming control module, or the duty cycle of the third switch in the power output module, so that the power output module outputs a power supply that matches the power supply voltage data.

[0020] Optionally, based on the power supply voltage data, a PFC boost control module, a voltage divider comparison control module, and a dimming control module are used to perform voltage division, comparison, boosting, and power regulation processing on the power supply voltage data, so that the power output module outputs a power supply that matches the power supply voltage data, including:

[0021] If the power supply voltage data is greater than the first voltage threshold, the power supply voltage data is divided by the first voltage divider submodule of the voltage divider comparison control module to obtain the second voltage divider.

[0022] The second voltage divider is input to the comparator of the voltage divider comparison control module for comparison, and the comparator outputs a high-level signal;

[0023] The high-level signal controls the second switch in the PFC boost control module to turn on, and the second voltage divider submodule of the PFC boost control module divides the power supply voltage data to obtain a third voltage divider.

[0024] If the third voltage divider is lower than the internal reference voltage set by the PFC main control submodule in the PFC boost control module, then the power supply voltage data is boosted to the second voltage threshold by the boost submodule of the PFC boost control module.

[0025] The second voltage threshold is adjusted by the resistor value in the second voltage divider submodule of the PFC boost control module, the duty cycle of the optocoupler in the dimming control module, or the duty cycle of the third switch in the power output module, so that the power output module outputs a power supply that matches the power supply voltage data.

[0026] Wherein, the second voltage threshold is greater than the first voltage threshold, and the second voltage threshold is greater than 400V.

[0027] Optionally, adjusting the duty cycle of the optocoupler in the dimming control module to make the power output module output a power supply that matches the power supply voltage data includes: acquiring a control signal input from the A / D signal input module, and controlling the duty cycle of the optocoupler according to the control signal to make the power output module output the first voltage threshold or the second voltage threshold at 0 to 100%.

[0028] One embodiment of this application provides an ultra-wide input voltage power supply and its control method. The ultra-wide input voltage power supply includes a power input terminal, a rectifier module, a PFC boost control module, a voltage divider comparison control module, a dimming control module, and a power output module. The power input terminal is connected to the input terminals of the rectifier module and the voltage divider comparison control module, respectively. The output terminal of the rectifier module is connected to the input terminal of the PFC boost control module. The output terminal of the PFC boost control module is connected to the output terminal of the voltage divider comparison control module and the input terminal of the power output module, respectively. The output terminal of the voltage divider comparison control module is connected to the input terminal of the dimming control module, and the output terminal of the dimming control module is connected to the power output module and the PFC boost control module, respectively. This ultra-wide input voltage power supply uses the high and low levels output by the voltage divider comparison control module to allow the PFC boost control module to select the boost voltage threshold. Then, the dimming control module adjusts the voltage threshold and outputs it to the power output module. The voltage output by the power output module can meet the mains voltage input conditions from 90V to 520V, perfectly compatible with two-phase or three-phase mains input conditions, achieving full coverage within the corresponding power range, meeting more market demands and applications, and solving the problem that traditional power supplies cannot directly power industrial electrical products. Attached Figure Description

[0029] To more clearly illustrate the technical solution in one embodiment of this application, the accompanying drawings used in the description of the embodiment will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0030] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0031] Figure 1 A schematic diagram of the frame of an ultra-wide input voltage power supply provided for one embodiment of this application.

[0032] Figure 2 A circuit diagram of an ultra-wide input voltage power supply provided for one embodiment of this application.

[0033] Figure 3 This is a circuit diagram of another power output module in an ultra-wide input voltage power supply provided in one embodiment of this application.

[0034] Figure 4 This is a flowchart illustrating a control method for an ultra-wide input voltage power supply provided in one embodiment of this application. Detailed Implementation

[0035] The technical solution of one embodiment of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0036] One embodiment of this application provides an ultra-wide input voltage power supply and its control method to solve the problem that traditional power supplies cannot directly power industrial electrical products.

[0037] Example 1:

[0038] One embodiment of this application provides an ultra-wide input voltage power supply; for example, please refer to [link to relevant documentation]. Figure 1 , Figure 1 A schematic diagram of the frame of an ultra-wide input voltage power supply provided for one embodiment of this application. Figure 2 A circuit diagram of an ultra-wide input voltage power supply provided for one embodiment of this application.

[0039] like Figure 1 As shown, this invention provides an ultra-wide input voltage power supply including a power input terminal 10, a rectifier module 20, a PFC boost control module 30, a voltage divider comparison control module 40, a dimming control module 50, and a power output module 60. The power input terminal 10 is connected to the input terminal of the rectifier module 20 and the input terminal of the voltage divider comparison control module 40. The output terminal of the rectifier module 20 is connected to the input terminal of the PFC boost control module 30. The output terminal of the PFC boost control module 30 is connected to the output terminal of the voltage divider comparison control module 40 and the input terminal of the power output module 60. The output terminal of the voltage divider comparison control module 40 is connected to the input terminal of the dimming control module 50. The output terminal of the dimming control module 50 is connected to the power output module 60 and the PFC boost control module 30.

[0040] To further explain, such as Figure 2As shown, the power input terminal 10 is used for three-phase or two-phase power input. In this embodiment, the power input terminal 10 includes a first live wire connection terminal AC-L1, a second live wire connection terminal AC-L2, and a neutral wire connection terminal AC-N. The rectifier module 20 is used to rectify the power input to the power input terminal 10 into DC power. The rectifier module 20 includes a third Zener diode D3, a fourth Zener diode D4, a voltage regulator bridge BD1, a fifth Zener diode D5, and a sixth Zener diode D6. The first live wire connection terminal AC-L1 is connected to the anode of the fifth Zener diode D5, the anode of the third Zener diode D3, and the cathode of the fourth Zener diode D4. The cathode of the fifth Zener diode D5 is connected to the cathode of the sixth Zener diode D6 and the input terminal of the voltage divider comparison control module 40. The neutral wire connection terminal AC-N is connected to the anode of the sixth Zener diode D6 and the first terminal 1 of the voltage regulator bridge BD1. The anode of the fourth Zener diode D4 and the fourth terminal 4 of the voltage regulator bridge BD1 are grounded. The cathode of the third Zener diode D3 is connected to the second terminal 2 of the voltage regulator bridge BD1 and the input terminal of the PFC boost control module 30. The Zener diodes can be selected as diodes.

[0041] To further explain, such as Figure 2 As shown, this ultra-wide input voltage power supply uses a PFC boost control module 30 to select and boost the power input terminal 10 to different voltage thresholds based on the high or low level output of the voltage divider comparison control module 40. Then, a dimming control module 50 adjusts the output power supply to different proportional voltage thresholds. In this embodiment, the PWM / PFM control section of the PFC boost control module 30 can employ flyback, dual-transistor flyback, or dual-transistor forward converter schemes to achieve different power and parameter selections and applications. In low-power applications, a 1050V switching transistor Q2 (MOSFET) can be used to directly employ a flyback topology. In high-power, non-high-current output applications, a dual-transistor flyback topology is used. In high-power, high-current output applications, a dual-transistor forward topology is used.

[0042] Furthermore, this ultra-wide input voltage power supply, through its three-connection power input terminal 10 and the PFC boost control module 30, voltage divider comparator control module 40, and dimming control module 50, introduces a topology of dual-transistor flyback and dual-transistor forward converters, reducing the switching transistor withstand voltage to achieve a wide voltage input, thus improving the stability and reliability of the ultra-wide input voltage power supply. In this embodiment, this ultra-wide input voltage power supply, designed for flyback or forward power supplies operating at wide input voltages, overcomes the problem of traditional power supplies requiring two or more power sources, reducing product size and cost. The high and low levels output by the voltage divider comparator control module 40 allow the PFC boost control module 30 to select the boost voltage threshold, and the dimming control module 50 adjusts the voltage threshold to output the voltage to the power output module 60. The voltage output by the power output module 60 can meet the input conditions of grid voltages from 90V to 520V, perfectly compatible with two-phase or three-phase grid input conditions, achieving full coverage within the corresponding power range, and meeting more market demands and applications.

[0043] An embodiment of this application provides an ultra-wide input voltage power supply, including a power input terminal, a rectifier module, a PFC boost control module, a voltage divider comparator control module, a dimming control module, and a power output module. The power input terminal is connected to the input terminals of the rectifier module and the voltage divider comparator control module, respectively. The output terminal of the rectifier module is connected to the input terminal of the PFC boost control module. The output terminal of the PFC boost control module is connected to the output terminal of the voltage divider comparator control module and the input terminal of the power output module, respectively. The output terminal of the voltage divider comparator control module is connected to the input terminal of the dimming control module, and the output terminal of the dimming control module is connected to the power output module and the PFC boost control module, respectively. This ultra-wide input voltage power supply uses the high and low levels output by the voltage divider comparison control module to allow the PFC boost control module to select the boost voltage threshold. Then, the dimming control module adjusts the voltage threshold and outputs it to the power output module. The voltage output by the power output module can meet the mains voltage input conditions from 90V to 520V, perfectly compatible with two-phase or three-phase mains input conditions, achieving full coverage within the corresponding power range, meeting more market demands and applications, and solving the problem that traditional power supplies cannot directly power industrial electrical products.

[0044] like Figure 2As shown in the embodiment of this invention, the voltage divider comparison control module 30 includes a first voltage divider submodule and a comparator U1A. The input terminal of the first voltage divider submodule is connected to the power input terminal 10, and the output terminal of the first voltage divider submodule is connected to the input terminal of the comparator U1A. The output terminal of the comparator U1A is connected to the input terminal of the dimming control module 50 and the PFC boost control module 30. The first voltage divider submodule includes an eleventh resistor R11, a twelfth resistor R12, a sixteenth resistor R16, and an eighteenth resistor R18 connected in series, and a resistor connected to the power supply input terminal 10. The eighteenth resistor R18 is connected in parallel with the second capacitor C2. The eleventh resistor R11 is connected to the power input terminal 10 through a Zener diode. The first terminal of the eighteenth resistor R18 and the first terminal of the second capacitor C2 are both connected to the input terminal 3 of comparator U1A. The second terminal of the eighteenth resistor R18 and the second terminal of the second capacitor C2 are both grounded. The output terminal of comparator U1A is connected to the PFC boost control module 30 through the fourteenth resistor R14, and the output terminal of comparator U1A is connected to the input terminal of the dimming control module 50 through the seventeenth resistor R17. In other embodiments, comparator U1A can also be an operational amplifier.

[0045] To further explain, such as Figure 2 As shown, the first end of the eleventh resistor R11 is connected to the cathodes of the fifth Zener diode D5 and the sixth Zener diode D6, respectively. In this embodiment, when the fifth Zener diode D5 and the sixth Zener diode D6 are in the conducting state, the power input to the power input terminal 10 is divided by the eleventh resistor R11, the twelfth resistor R12, the sixteenth resistor R16 and the eighteenth resistor R18 connected in series to obtain the first divided voltage. After being filtered by the second capacitor C2, it is transmitted to the input terminal of the comparator U1A. When the first divided voltage is lower than the reference voltage of the input terminal of the comparator U1A, the comparator U1A outputs a low-level signal, the second switch Q2 of the PFC boost control module 30 is turned off, and the PFC boost control module 30 boosts the power input to the power input terminal 10 to the first voltage threshold Vpfc1.

[0046] like Figure 2As shown in the embodiment of the present invention, the PFC boost control module 30 includes a second voltage divider submodule, a PFC main control submodule, and a boost submodule. The input terminal of the second voltage divider submodule is connected to the output terminal of the voltage divider comparison control module 40, the input terminal of the second voltage divider submodule is connected to the PFC main control submodule, and the output terminal of the PFC main control submodule is connected to the boost submodule. The second voltage divider submodule includes a second switch Q2 and a voltage divider resistor assembly. The third terminal of the second switch Q2 is connected to the output terminal of the voltage divider comparison control module 40, the first terminal of the second switch Q2 is connected to the voltage divider resistor assembly, the voltage divider resistor assembly is also connected to the PFC main control submodule, and the second terminal of the second switch Q2 is grounded. The boost submodule includes a transformer. The input terminal of the transformer is connected to the PFC main control submodule, the output terminal of the transformer is connected to the input terminal of the power output module, and the PFC main control submodule is also connected to the dimming control module 50.

[0047] Furthermore, the switching transistor can be selected as a MOSFET, with the gate of the MOSFET serving as the third terminal, the source of the MOSFET serving as the second terminal, and the drain of the MOSFET serving as the first terminal. In this embodiment, the voltage divider resistor assembly includes a first resistor R1, a fourth resistor R4, a ninth resistor R9, and a tenth resistor R10. The first terminal of the first resistor R1 is connected in series with the first Zener diode and the first inductor and is connected to the output terminal of the rectifier module 20. The second terminal of the first resistor R1 is connected in series with the fourth resistor R4 and is then connected to the PFC main control submodule, the first terminal of the ninth resistor R9, and the first terminal of the tenth resistor R10, respectively. The second terminal of the ninth resistor R9 is connected to the first terminal of the second switching transistor Q2, and the second terminal of the tenth resistor R10 is grounded. Both the second voltage divider submodule and the PFC main control submodule are connected to the boost submodule. When the first voltage divider is greater than the reference voltage at the input of comparator U1A, comparator U1A outputs a high level. Comparator U1A turns on the second switch Q2 through the fourteenth resistor R14. Since the voltage drop of the second switch Q2 is small, the ninth resistor R9 and the tenth resistor R10 are directly connected in parallel after the second switch Q2 is turned on. The PFC voltage output by the rectifier module 20 is divided by the first resistor R1 and the fourth resistor R4 in series, then in parallel with the ninth resistor R9 and in series with the tenth resistor R10 to obtain the second voltage divider. When the second voltage divider is lower than the internal reference voltage of the IC in the PFC main control submodule, the second voltage divider is further increased to the second voltage threshold Vpfc2 through the boost submodule. The second voltage Vpfc2 is greater than the first voltage threshold Vpfc1. The second voltage threshold Vpfc2 is designed to have a high PF value (power factor) under the highest input voltage conditions. The second voltage threshold Vpfc2 is usually set at around 740Vdc. The voltage boosted by the boost submodule is supplied to the PWM / PFM control section of the PFC main control submodule.

[0048] In this embodiment of the invention, when a three-phase power input is used, the first live wire connection terminal AC-L1 and the second live wire connection terminal AC-L2 are simultaneously connected to the two L lines of the three-phase power input. The fifth Zener diode D5 and the sixth Zener diode D6 are turned on. The voltage is divided by the eleventh resistor R11, the twelfth resistor R12, the sixteenth resistor R16 in series, and the eighteenth resistor R18, and then filtered by the second capacitor C2 before being supplied to the input terminal of comparator U1A. When the first voltage divider is lower than the reference voltage at the input terminal of comparator U1A, comparator U1A outputs a low level. The PFC boost control module boosts the PFC voltage output by the rectifier module 20 to the first voltage. The threshold voltage Vpfc1; when the first voltage divider is greater than the input reference voltage of comparator U1A, comparator U1A outputs a high level. The high level turns on the second switch Q2 through the fourteenth resistor R14. Because the voltage drop of the second switch Q2 is small, the ninth resistor R9 and the tenth resistor R10 are directly connected in parallel after the second switch is turned on. The PFC voltage output by the rectifier module 20 is divided by the first resistor R1 and the fourth resistor R4 in series, then in parallel with the ninth resistor R9 and in series with the tenth resistor R10. When the second voltage divider is lower than the internal reference voltage of the main control IC of the PFC main control submodule, the PFC voltage is further increased to the second voltage threshold Vpfc2. Theoretically, regardless of whether it is a two-phase or three-phase input, the voltage across the eighteenth resistor R18 is equivalent under the same voltage conditions, so compatibility with the grid voltage can be easily achieved.

[0049] In this embodiment of the invention, the PWM / PFM control section of the PFC main control submodule can be directly implemented using a single-tube flyback in applications with low power. The transformer reflected voltage and leakage inductance of the boost submodule are reasonably designed by using a 1050V high-voltage second switching transistor Q2.

[0050] like Figure 2 As shown, in an embodiment of the present invention, the dimming control module 50 includes an optocoupler U2, which includes an optocoupler diode and an optocoupler switch.

[0051] To further explain, when the first voltage divider is greater than the reference voltage at the input of comparator U1A, comparator U1A outputs a high level. The high level of comparator U1A, through the seventeenth resistor R17, turns on the optocoupler diode of the optocoupler device U2 in the dimming control module 50. After receiving the signal, the optocoupler switch clamps the dimming control section to a fixed value. This clamping value is used to control the different output power limits at different input voltages and different voltage divider segments of the PFC boost control module 30, so that the power of the product at the first voltage threshold Vpfc1 is less than the second voltage threshold Vpfc2. The purpose is to improve the ability to maintain a high PF value (power factor) at the highest input voltage. The clamping value refers to the following: when the first voltage divider is less than the reference voltage at pin 2, the comparator U1A outputs a low potential. At this time, the optocoupler U2 is not turned on, and the dimming control module 50 outputs 50% or other values ​​less than 100% of the output power without a low level. This can also be understood as the power supply always being in a dimming state or a light load state when the optocoupler U2 is not turned on. When the first voltage divider is greater than the reference voltage at the input of the comparator U1A, the comparator U1A outputs a high potential. At this time, the optocoupler U2 is turned on, and the optocoupler switch of the optocoupler U2 turns on, lowering the potential of the dimming control module 50. The dimming control module 50 releases the maximum duty cycle power supply and is in a non-dimming state, thus ensuring that the power at the first voltage threshold Vpfc1 is less than the second voltage threshold Vpfc2.

[0052] Figure 3 This is a circuit diagram of another power output module in an ultra-wide input voltage power supply provided in one embodiment of this application.

[0053] like Figure 2 and Figure 3 As shown, in an embodiment of the present invention, the power output module 60 includes a rectifier and filter output submodule and an output power adjustable submodule. The input terminal of the rectifier and filter output submodule is connected to the output terminal of the PFC boost control module, and the output terminal of the rectifier and filter output submodule is connected to the input terminal of the output power adjustable submodule. The output power adjustable submodule and the rectifier and filter output submodule are also connected to the dimming control module 50. The output power adjustable submodule includes a third switch Q3. The third terminal of the third switch Q3 is connected to the dimming control module 50, the first terminal of the third switch Q3 is connected to the first power interface, and the second terminal of the third switch Q3 is connected in series with the second electrolytic capacitor CE2 and connected to the second power interface.

[0054] The rectifier and filter output submodule includes the 33rd Zener diode D33 and the 6th electrolytic capacitor CE6 connected in parallel with the 33rd Zener diode D33;

[0055] Alternatively, the rectifier and filter output submodule includes a 33rd Zener diode D33, a 34th Zener diode D34, a filter inductor L31, and a 6th electrolytic capacitor CE6. The 33rd Zener diode D33 and the 34th Zener diode D34 are connected in parallel and then connected to the first end of the filter inductor L31. The second end of the filter inductor L31 is connected to the positive terminal of the 6th electrolytic capacitor CE6. The negative terminal of the 6th electrolytic capacitor CE6 is connected to the anode of the 34th Zener diode D33 and the dimming control module 50, respectively.

[0056] To further clarify, a comparison resistor RS is connected in series between the rectifier filter output submodule and the output power adjustable submodule.

[0057] like Figure 2 As shown, in an embodiment of the present invention, the ultra-wide input voltage power supply includes an A / D signal input module 70 connected to the dimming control module 50.

[0058] To further explain, the dimming control module 50 can receive external analog and digital signals through the A / D signal input module 70 to achieve dimming from 0 to 100%. The analog signals include 0 to 10V, resistors, etc., while the digital signals and PWM signals include signals from signal generators, signal controllers, and smart modules (such as WIFI, Bluetooth, ZIGBEE, 2.4G, etc.).

[0059] like Figure 2 As shown, in the embodiments of the present invention, the ultra-wide input voltage power supply can adjust the output power of the power output module and limit its output voltage through a PFC boost control module, a voltage divider comparison control module, or a dimming control module.

[0060] Furthermore, this ultra-wide input voltage power supply has several advantages. First, the output power of the power output module can be changed by adjusting the resistor value of the second voltage divider submodule in the PFC boost control module. Second, the duty cycle of the optocoupler in the dimming control module 50 can be controlled. When the optocoupler U2 is not conducting, the dimming control module 50 latches a fixed duty cycle, equivalent to being in a dimming state. When the optocoupler U2 is conducting, the duty cycle is 100%, achieving the power supply voltage corresponding to the full power output of the power output module. Third, the PWM dimming signal generated by the dimming control module 50 is filtered into a DC signal by a resistor RC and used as an internal current reference signal. The voltage across the comparison resistor RS is compared with the internal reference signal of the optocoupler U2, making the voltage across the comparison resistor RS approximately equal to the reference voltage. A stable output current is obtained from the power output module 60 using I = V / R. Fourth, power adjustment is achieved by using PWM switching chopping. Specifically, the signal from optocoupler U2 causes the dimming control module 50 to output a fixed duty cycle, which is used to control the switching time of the third switch Q3 in series in the output section to achieve power adjustment. This method is not suitable for applications with high ripple requirements. Since the output ripple is achieved by switching the third switch Q3 on and off, it is much larger than the previous three methods. In application, the ripple and flicker coefficient can be reduced by increasing the PWM switching frequency.

[0061] Example 2:

[0062] Figure 4 This is a flowchart illustrating a control method for an ultra-wide input voltage power supply provided in one embodiment of this application.

[0063] like Figure 4 As shown, one embodiment of this application discloses a control method for an ultra-wide input voltage power supply, applied to the aforementioned ultra-wide input voltage power supply. The control method includes the following steps:

[0064] Acquire the power voltage data required by the user connected to the power output module, as well as the power supply voltage data input at the power input terminal;

[0065] Based on the power supply voltage data, the PFC boost control module, voltage divider comparison control module, and dimming control module are used to perform voltage division, comparison, boosting, and power regulation processing on the power supply voltage data, so that the power output module outputs power that matches the power supply voltage data.

[0066] It should be further noted that the above-mentioned ultra-wide input voltage power supply has been described in Embodiment 1, and will not be repeated in this embodiment.

[0067] In this embodiment of the invention, the power supply voltage data is divided, compared, boosted, and power regulated using a PFC boost control module, a voltage divider comparison control module, and a dimming control module, so that the power output module outputs a power supply that matches the power supply voltage data.

[0068] If the power supply voltage data is less than the first voltage threshold, the power supply voltage data is divided by the first voltage divider submodule of the voltage divider comparison control module to obtain the first voltage divider voltage.

[0069] The first voltage divider is input to the comparator of the voltage divider comparison control module for comparison, and the comparator outputs a low-level signal;

[0070] According to the low-level signal, the second switch in the PFC boost control module is turned off and the power supply voltage data is boosted to the first voltage threshold through its boost submodule.

[0071] The first voltage threshold is adjusted by the resistance value in the second voltage divider submodule of the PFC boost control module, the duty cycle of the optocoupler in the dimming control module, or the duty cycle of the third switch in the power output module, so that the power output module outputs a power supply that matches the power supply voltage data.

[0072] In this embodiment of the invention, the power supply voltage data is divided, compared, boosted, and power regulated using a PFC boost control module, a voltage divider comparison control module, and a dimming control module, so that the power output module outputs a power supply that matches the power supply voltage data.

[0073] If the power supply voltage data is greater than the first voltage threshold, the power supply voltage data is divided by the first voltage divider submodule of the voltage divider comparison control module to obtain the second voltage divider.

[0074] The second voltage divider is input to the comparator of the voltage divider comparison control module for comparison, and the comparator outputs a high-level signal;

[0075] The high-level signal controls the second switch in the PFC boost control module to turn on, and the second voltage divider submodule of the PFC boost control module divides the power supply voltage data to obtain the third voltage divider.

[0076] If the third voltage divider is lower than the internal reference voltage set by the PFC main control submodule in the PFC boost control module, the power supply voltage data will be boosted to the second voltage threshold through the boost submodule of the PFC boost control module.

[0077] The second voltage threshold is adjusted by the resistance value in the second voltage divider submodule of the PFC boost control module, the duty cycle of the optocoupler in the dimming control module, or the duty cycle of the third switch in the power output module, so that the power output module outputs a power supply that matches the power supply voltage data.

[0078] The second voltage threshold is greater than the first voltage threshold, and the second voltage threshold is greater than 400V.

[0079] To further explain, adjusting the duty cycle of the optocoupler in the dimming control module to make the power output module output a power supply that matches the power supply voltage data includes: acquiring the control signal input from the A / D signal input module, and controlling the duty cycle of the optocoupler according to the control signal to make the power output module output a first voltage threshold or a second voltage threshold of 0 to 100%.

[0080] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0081] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0082] The above provides a detailed description of an ultra-wide input voltage power supply provided by one embodiment of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A power supply with an ultra-wide input voltage range, characterized in that, The device includes a power input terminal, a rectifier module, a PFC boost control module, a voltage divider comparison control module, a dimming control module, and a power output module. The power input terminal is connected to the input terminal of the rectifier module and the input terminal of the voltage divider comparison control module. The output terminal of the rectifier module is connected to the input terminal of the PFC boost control module. The output terminal of the PFC boost control module is connected to the output terminal of the voltage divider comparison control module and the input terminal of the power output module. The output terminal of the voltage divider comparison control module is connected to the input terminal of the dimming control module. The output terminal of the dimming control module is connected to the power output module and the PFC boost control module. The PFC boost control module includes a second voltage divider submodule, a PFC main control submodule, and a boost submodule. The input terminal of the second voltage divider submodule is connected to the output terminal of the voltage divider comparison control module, and the input terminal of the second voltage divider submodule is also connected to the input terminal of the PFC main control submodule. The output terminal of the PFC main control submodule is connected to the boost submodule. The second voltage divider submodule includes a second switching transistor and a voltage divider resistor assembly. The third terminal of the second switching transistor is connected to the output terminal of the voltage divider comparison control module, and the first terminal of the second switching transistor is connected to the voltage divider resistor assembly. The voltage divider resistor assembly is also connected to the PFC main control submodule, and the second terminal of the second switching transistor is grounded. The boost submodule includes a transformer. The input terminal of the transformer is connected to the PFC main control submodule, and the output terminal of the transformer is connected to the input terminal of the power output module. The PFC main control submodule is also connected to the dimming control module.

2. The ultra-wide input voltage power supply according to claim 1, characterized in that, The voltage divider comparison control module includes a first voltage divider submodule and a comparator. The input terminal of the first voltage divider submodule is connected to the power input terminal, and the output terminal of the first voltage divider submodule is connected to the input terminal of the comparator. The output terminal of the comparator is connected to the input terminal of the dimming control module and the PFC boost control module. The first voltage divider submodule includes an eleventh resistor, a twelfth resistor, a sixteenth resistor, and an eighteenth resistor connected in series, and a second capacitor connected in parallel with the eighteenth resistor. The eleventh resistor is connected to the power input terminal through a Zener diode. The first terminal of the eighteenth resistor and the first terminal of the second capacitor are both connected to the input terminal of the comparator. The second terminal of the eighteenth resistor and the second terminal of the second capacitor are both grounded. The output terminal of the comparator is connected to the PFC boost control module through a fourteenth resistor, and the output terminal of the comparator is connected to the input terminal of the dimming control module through a seventeenth resistor.

3. The ultra-wide input voltage power supply according to claim 1, characterized in that, The dimming control module includes an optocoupler, which includes an optocoupler diode and an optocoupler switch.

4. The ultra-wide input voltage power supply according to claim 1, characterized in that, The power output module includes a rectifier and filter output submodule and an adjustable output power submodule. The input terminal of the rectifier and filter output submodule is connected to the output terminal of the PFC boost control module, and the output terminal of the rectifier and filter output submodule is connected to the input terminal of the adjustable output power submodule. The adjustable output power submodule and the rectifier and filter output submodule are also connected to the dimming control module. The adjustable output power submodule includes a third switching transistor. The third terminal of the third switching transistor is connected to the dimming control module, the first terminal of the third switching transistor is connected to a first power interface, and the second terminal of the third switching transistor is connected in series with a second electrolytic capacitor and connected to a second power interface. The rectifier and filter output submodule includes a 33rd Zener diode and a 6th electrolytic capacitor connected in parallel with the 33rd Zener diode; Alternatively, the rectifier and filter output submodule may include a 33rd Zener diode, a 34th Zener diode, a filter inductor, and a 6th electrolytic capacitor. The 33rd Zener diode and the 34th Zener diode are connected in parallel and then connected to the first end of the filter inductor. The second end of the filter inductor is connected to the positive terminal of the 6th electrolytic capacitor. The negative terminal of the 6th electrolytic capacitor is connected to the anode of the 34th Zener diode and the dimming control module, respectively.

5. The ultra-wide input voltage power supply according to claim 1, characterized in that, It includes an A / D signal input module connected to the dimming control module.

6. A control method for an ultra-wide input voltage power supply, applied to the ultra-wide input voltage power supply as described in claims 1-5, characterized in that, The control method includes the following steps: Acquire the power voltage data required by the user connected to the power output module and the power supply voltage data input at the power input terminal; Based on the power supply voltage data, a PFC boost control module, a voltage divider comparison control module, and a dimming control module are used to perform voltage division, comparison, boosting, and power regulation processing on the power supply voltage data, so that the power output module outputs power that matches the power supply voltage data.

7. The control method for an ultra-wide input voltage power supply according to claim 6, characterized in that, Based on the power supply voltage data, a PFC boost control module, a voltage divider and comparison control module, and a dimming control module are used to perform voltage division, comparison, boosting, and power regulation processing on the power supply voltage data, so that the power output module outputs a power supply that matches the power supply voltage data. If the power supply voltage data is less than the first voltage threshold, the power supply voltage data is divided by the first voltage divider submodule of the voltage divider comparison control module to obtain the first voltage divider voltage. The first voltage divider is input to the comparator of the voltage divider comparison control module for comparison, and the comparator outputs a low-level signal; According to the low-level signal, the second switch in the PFC boost control module is turned off and the power supply voltage data is boosted to the first voltage threshold through its boost submodule. The first voltage threshold is adjusted by the resistance value in the second voltage divider submodule of the PFC boost control module, the duty cycle of the optocoupler in the dimming control module, or the duty cycle of the third switch in the power output module, so that the power output module outputs a power supply that matches the power supply voltage data.

8. The control method for an ultra-wide input voltage power supply according to claim 7, characterized in that, Based on the power supply voltage data, a PFC boost control module, a voltage divider and comparison control module, and a dimming control module are used to perform voltage division, comparison, boosting, and power regulation processing on the power supply voltage data, so that the power output module outputs a power supply that matches the power supply voltage data. If the power supply voltage data is greater than the first voltage threshold, the power supply voltage data is divided by the first voltage divider submodule of the voltage divider comparison control module to obtain the second voltage divider. The second voltage divider is input to the comparator of the voltage divider comparison control module for comparison, and the comparator outputs a high-level signal; The high-level signal controls the second switch in the PFC boost control module to turn on, and the second voltage divider submodule of the PFC boost control module divides the power supply voltage data to obtain a third voltage divider. If the third voltage divider is lower than the internal reference voltage set by the PFC main control submodule in the PFC boost control module, then the power supply voltage data is boosted to the second voltage threshold by the boost submodule of the PFC boost control module. The second voltage threshold is adjusted by the resistor value in the second voltage divider submodule of the PFC boost control module, the duty cycle of the optocoupler in the dimming control module, or the duty cycle of the third switch in the power output module, so that the power output module outputs a power supply that matches the power supply voltage data. Wherein, the second voltage threshold is greater than the first voltage threshold, and the second voltage threshold is greater than 400V.

9. The control method for an ultra-wide input voltage power supply according to claim 8, characterized in that, Adjusting the duty cycle of the optocoupler in the dimming control module to make the power output module output a power supply that matches the power supply voltage data includes: acquiring the control signal input from the A / D signal input module, and controlling the duty cycle of the optocoupler according to the control signal to make the power output module output the first voltage threshold or the second voltage threshold at 0~100%.

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