A high power factor intelligent power supply circuit

Abstract

This invention discloses a high power factor intelligent power supply circuit, comprising: a power supply module, a power adjustment module, a first output module, a second output module, an output detection module, an intelligent control module, and an LED module. The intelligent control module is used to control the power adjustment module to adjust the first voltage received by the first output module and the second voltage received by the second output module based on the voltage sampling signal output by the output detection module. The intelligent control module is configured to receive the voltage sampling signal and control the conduction degree of the power adjustment module according to the voltage sampling signal to achieve power factor correction. By detecting the power input to the LED module and the voltage signals output by the first and second output modules, the intelligent control module and the power adjustment module cooperate to correct the power factor of the input power of the LED module, ensuring stable input power and effectively avoiding flicker problems.

Description

Technical Field

[0001] This specification relates to the field of electronic circuit technology, specifically to a high power factor intelligent power supply circuit. Background Technology

[0002] Power supply circuits provide stable current and are highly energy-efficient, making them widely used. To improve power efficiency, power factor correction (PFC) is necessary. LED power supply circuits typically employ active PFC circuits. However, LED power supply circuits using electrolytic capacitors have limited lifespans, while those without electrolytic capacitors are prone to LED flickering. Summary of the Invention

[0003] This invention overcomes the drawback of flickering in existing power supply circuits by providing a high power factor intelligent power supply circuit. By detecting the power of the input LED module and the voltage signals output by the first and second output modules, the intelligent control module and power adjustment module work together to correct the power factor of the input power of the LED module, ensuring the stability of the input power of the LED module and effectively avoiding the flickering problem.

[0004] To solve the above technical problems, the technical solution of the present invention is as follows:

[0005] This invention provides a high power factor intelligent power supply circuit, comprising: a power supply module, a power regulation module, a first output module, a second output module, an output detection module, an intelligent control module, and an LED module;

[0006] The intelligent control module is connected to the power adjustment module, the second output module and the output detection module respectively, and is used to control the power adjustment module to adjust the first voltage received by the first output module and the second voltage received by the second output module according to the voltage sampling signal output by the output detection module.

[0007] The power regulation module is connected to the power supply module, the first output module, and the second output module, respectively.

[0008] The first output module is connected to the output detection module and the LED module respectively;

[0009] The second output module is connected to the output detection module and the LED module respectively;

[0010] The intelligent control module is configured as follows:

[0011] It receives voltage sampling signals and controls the conduction level of the power regulation module based on the voltage sampling signals to achieve power factor correction.

[0012] By detecting the power of the input LED module and the voltage signals output by the first and second output modules, it is determined whether the voltage signal output by the first output module can maintain the stability of the power input to the LED module. The intelligent control module and the power regulation module work together to correct the power factor of the input power of the LED module. When the first output power of the first power is less than the power of the input LED module, the second output module is controlled to output the second power, thus completing the power regulation and energy balance control of the first output module, ensuring the stability of the input power of the LED module, effectively avoiding the flicker problem, and thereby improving the working life of the LED module.

[0013] Preferably, the conduction level of the power regulation module is controlled according to the voltage sampling signal to achieve power factor correction, including:

[0014] After receiving the voltage sampling signal, the intelligent control module determines whether the voltage sampling signal is lower than the first threshold.

[0015] If so, determine whether the first voltage is lower than the second threshold.

[0016] If so, control the conduction level of the power regulation module to increase the first voltage;

[0017] If not, the conduction level of the power regulation module is controlled to increase the second voltage.

[0018] The intelligent control module controls the conduction level of the power regulation module by analyzing the voltage sampling signal fed back from the output detection module, thereby controlling the first and second voltages and achieving power factor correction. The judgment method is simple and effective.

[0019] Preferably, the power regulation module includes: a first capacitor, a first resistor, a first diode, a second transformer, a first power transistor, and a second resistor;

[0020] The first terminal of the first capacitor, the first terminal of the first resistor, and the first terminal of the primary winding of the second transformer are all connected to the power module. The second terminal of the first capacitor and the second terminal of the second resistor are all connected to the cathode of the first diode. The anode of the first diode is connected to the second terminal of the primary winding of the second transformer and the drain of the first power transistor. The source of the first power transistor is connected to the intelligent control module and grounded through the second resistor. The gate of the first power transistor is connected to the intelligent control module. The secondary winding of the second transformer is connected to the first output module. The second terminal of the secondary winding of the second transformer is grounded. The auxiliary winding of the second transformer is connected to the second output module.

[0021] When the power regulation module receives the first pulse signal output by the intelligent control module, the first capacitor, the first resistor, the first diode, the second transformer, the first power transistor, and the second resistor work together to regulate the first pulse signal and output the regulated current.

[0022] Preferably, the first output module includes: a second diode and a second capacitor;

[0023] The anode of the second diode is connected to the first terminal of the secondary winding of the second transformer, the cathode of the second diode is connected to the first terminal of the second capacitor and the LED module, and the second terminal of the second capacitor is grounded.

[0024] The power regulation module adjusts the output current according to the first pulse signal, thereby controlling the first electrical energy output by the first output module, providing a stable pulse current to the LED module, and effectively suppressing the flicker problem.

[0025] Preferably, the second output module includes: a third diode, a second power transistor, a third capacitor, and a fourth diode; the anode of the third diode is connected to the anode of the fourth diode, the cathode of the third diode is connected to the drain of the second power transistor, the source of the second power transistor is connected to the first terminal of the third capacitor and the first output module, the second terminal of the third capacitor is connected to the second terminal of the auxiliary winding of the second transformer, and the gate of the second power transistor is connected to the intelligent control module.

[0026] By turning off the second power transistor, the electrical energy is released from the third diode to the second capacitor. When the current input to the second transformer decreases, the second and third capacitors provide current to the LED module, thereby providing a stable pulse current to the LED module and suppressing the flicker problem.

[0027] Preferably, the second output module also includes: a fifth diode, a third power transistor, and a fourth capacitor;

[0028] The cathode of the fifth diode is connected to the third terminal of the auxiliary winding of the second transformer, the anode of the fifth diode is connected to the drain of the third power transistor, the source of the third power transistor is connected to the cathode of the fourth diode and the first terminal of the fourth capacitor, the second terminal of the fourth capacitor is connected to the second terminal of the third diode, and the gate of the third power transistor is connected to the intelligent control module.

[0029] By turning off the third power transistor, the third and fourth capacitors are controlled to provide current to the LED module, thereby providing a stable pulse current to the LED module and suppressing the flicker problem.

[0030] Preferably, the power module includes: an AC power supply, a first transformer, and a first rectifier;

[0031] The AC power supply is connected to the primary winding of the first transformer. The first end of the secondary winding of the first transformer is connected to the first end of the first rectifier. The second end of the secondary winding of the first transformer is connected to the third end of the first rectifier. The second end of the first rectifier is connected to the first end of the primary winding of the second transformer. The fourth end of the first rectifier is grounded.

[0032] The AC power output from the AC power source is converted into DC power through the first transformer and the first rectifier, which is used to power rechargeable devices.

[0033] Preferably, the output detection module includes: a third resistor, a fourth resistor, a fifth resistor, a fifth capacitor, a first operational amplifier, a second operational amplifier, and a sixth diode;

[0034] The first output module is connected to the first terminal of the third resistor and the inverting terminal of the second remote terminal, respectively. The second terminal of the third resistor is connected to the non-inverting terminal of the first operational amplifier and grounded through the fourth resistor. The inverting terminal of the first operational amplifier is connected to the cathode of the sixth diode, the first terminal of the fifth capacitor, the non-inverting terminal of the second operational amplifier, and the first terminal of the fifth resistor, respectively. The second terminal of the fifth resistor and the second terminal of the fifth capacitor are both grounded. The output terminal of the second operational amplifier is connected to the intelligent control module.

[0035] By setting up a first operational amplifier and a second operational amplifier, the power output of the first output module is compared with the power required by the LED module. When the power output of the first output module is less than the power required by the LED module, the intelligent control module and the power adjustment module work together to adjust the output power of the first output module. At the same time, the second output module is controlled to provide current to the LED module, so as to provide a stable pulse current to the LED module and suppress the flicker problem.

[0036] Preferably, the output detection module also includes: a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, and an eleventh resistor;

[0037] The first end of the sixth resistor is connected to the first output module, and the second end of the sixth resistor is connected to the first end of the eleventh resistor and the intelligent control module. The first end of the seventh resistor is connected to the second output module, and the second end of the seventh resistor is connected to the first end of the ninth resistor and the intelligent control module. The first end of the eighth resistor is connected to the second output module, and the second end of the eighth resistor is connected to the first end of the tenth resistor and the intelligent control module.

[0038] The output detection module is used to detect the output power of the first output module and the second output module. By setting the sixth, seventh, eighth, ninth, tenth and eleventh resistors, the power of the second, third and fourth capacitors can be detected. The intelligent control module controls the power adjustment module according to the detected power value.

[0039] Preferably, the intelligent control module includes: a first controller.

[0040] Compared with the prior art, the beneficial effects that at least one of the above-mentioned technical solutions adopted in this specification can achieve include at least:

[0041] By detecting the power of the input LED module and the voltage signals output by the first and second output modules, it is determined whether the voltage signal output by the first output module can maintain the stability of the power input to the LED module. The intelligent control module and the power regulation module work together to correct the power factor of the input power of the LED module. When the first output power of the first power is less than the power of the input LED module, the second output module is controlled to output the second power, thus completing the power regulation and energy balance control of the first output module, ensuring the stability of the input power of the LED module, effectively avoiding the flicker problem, and thereby improving the working life of the LED module.

[0042] When the power regulation module receives the first pulse signal output by the intelligent control module, the first capacitor, the first resistor, the first diode, the second transformer, the first power transistor, and the second resistor work together to regulate the first pulse signal and output the regulated current.

[0043] The power regulation module adjusts the output current according to the first pulse signal, thereby controlling the first electrical energy output by the first output module, providing a stable pulse current to the LED module, and effectively suppressing the flicker problem. Attached Figure Description

[0044] Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. The drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings.

[0045] Figure 1 A schematic diagram of a high power factor intelligent power supply circuit provided by the present invention;

[0046] Figure 2 A circuit diagram of a high power factor intelligent power supply circuit provided by the present invention;

[0047] Figure 3 A circuit diagram of the output detection module in a high power factor intelligent power supply circuit provided by the present invention;

[0048] Figure 4 The circuit diagram of the output detection module in a high power factor intelligent power supply circuit provided by the present invention. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only one preferred embodiment of this invention and are only used to explain this invention. They do not limit the scope of protection of this invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0050] Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe the operations (or steps) as sequential processes, many of the operations (or steps) can be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but it may also have additional steps not included in the figures; the process may correspond to a method, function, procedure, subroutine, subroutine, etc.

[0051] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0052] Example: Figure 1 As shown in the figure, this specification provides a high power factor intelligent power supply circuit, including: a power supply module, a power regulation module, a first output module, a second output module, an output detection module, an intelligent control module, and an LED module;

[0053] The intelligent control module is connected to the power adjustment module, the second output module and the output detection module respectively, and is used to control the power adjustment module to adjust the first voltage received by the first output module and the second voltage received by the second output module according to the voltage sampling signal output by the output detection module.

[0054] The power regulation module is connected to the power supply module, the first output module, and the second output module, respectively.

[0055] The first output module is connected to the output detection module and the LED module respectively;

[0056] The second output module is connected to the output detection module and the LED module respectively;

[0057] The intelligent control module is configured as follows:

[0058] It receives voltage sampling signals and controls the conduction level of the power regulation module based on the voltage sampling signals to achieve power factor correction.

[0059] In practice, the power module is connected to an external AC power source to receive AC current. The power module uses a step-down circuit and a rectifier circuit to step down and rectify the input AC current before outputting DC current.

[0060] In practice, the intelligent control module is connected to the power regulation module, the second output module and the output detection module respectively. The intelligent control module receives the output signal fed back by the output detection module and outputs the first pulse signal and the second pulse signal.

[0061] Preferably, the intelligent control module includes a microcontroller and a DSP (digital signal processing unit). The microcontroller and DSP integrate many components such as an arithmetic unit, a controller, a memory, and input / output devices to realize functions such as signal processing, data storage, module control, and timing control.

[0062] During implementation, the power regulation module receives the first pulse signal output by the intelligent control module, and adjusts the power output according to the first pulse signal.

[0063] Preferably, the power regulation module includes a power regulation circuit composed of a power transistor circuit and a high-frequency transformer circuit. The power regulation module regulates the electrical power output by the high-frequency transformer circuit through the power transistor circuit to achieve power factor correction control.

[0064] In practice, the first output module is connected to the power regulation module and is used to rectify and filter the regulated power output by the power regulation module to output the first power.

[0065] Preferably, the first output module uses a rectifier and filter circuit to rectify and filter the input regulated electrical energy.

[0066] In practice, the second output module is connected to the power regulation module and the intelligent control module. The second output module includes a power balancing circuit. When the second output module receives the second pulse signal output by the power regulation module, it controls the power balancing circuit to perform power regulation processing on the regulated power output by the power regulation module according to the second pulse signal, and performs power compensation processing on the first output module.

[0067] Preferably, the second output module includes a power balancing circuit, which is controlled by an intelligent control module. The power balancing circuit adjusts the power output of the power adjustment module to achieve power balancing and compensation processing for the first output module.

[0068] In practice, the output detection module is connected to the first output module, the second output module, and the intelligent control module respectively. It is used to sample the voltage signals output by the first output module and the second output module and output the sampled voltage signal. It is also used to detect the power of the first electrical energy output by the first output module and determine the power difference of the input LED module.

[0069] Preferably, the output detection module includes a voltage sampling circuit and a power detection circuit. The voltage sampling circuit samples the voltage signals of the first output module and the second output module, and the power detection circuit detects and judges the power of the first electrical energy of the first output module.

[0070] In practice, the LED module is connected to the first output module and the second output module respectively, and is used to receive the first electrical energy output by the first output module and the second electrical energy output by the second output module.

[0071] Preferably, the LED module includes an LED module circuit.

[0072] In practice, when the intelligent control module receives the voltage sampling signal, it controls the conduction level of the power regulation module according to the voltage sampling signal in order to correct the power factor.

[0073] By detecting the power of the input LED module and the voltage signals output by the first and second output modules, it is determined whether the voltage signal output by the first output module can maintain the stability of the power input to the LED module. The intelligent control module and the power regulation module work together to correct the power factor of the input power of the LED module. When the first output power of the first power is less than the power of the input LED module, the second output module is controlled to output the second power, thus completing the power regulation and energy balance control of the first output module, ensuring the stability of the input power of the LED module, effectively avoiding the flicker problem, and thereby improving the working life of the LED module.

[0074] In some implementations, the conduction level of the power regulation module is controlled based on the voltage sampling signal to achieve power factor correction, including:

[0075] After receiving the voltage sampling signal, the intelligent control module determines whether the voltage sampling signal is lower than the first threshold.

[0076] If so, determine whether the first voltage is lower than the second threshold.

[0077] If so, control the conduction level of the power regulation module to increase the first voltage;

[0078] If not, the conduction level of the power regulation module is controlled to increase the second voltage.

[0079] In practice, when the voltage sampling signal received by the intelligent control module from the output detection module is not lower than the first threshold, it determines that the input voltage required by the LED module is a stable voltage, and no adjustment is required from the power regulation module.

[0080] When the voltage sampling signal received by the intelligent control module from the output detection module is lower than the first threshold, it determines that the input voltage required by the LED module is low, and the power regulation module needs to adjust the first output module or the second output module.

[0081] Determine whether the first voltage received by the first output module is lower than the second threshold. If the first voltage is lower than the second threshold, it is determined that the first voltage is low and needs to be adjusted. At this time, the conduction degree of the power regulation module needs to be controlled to increase the first voltage. If the first voltage is not lower than the second threshold, it is determined that the first output module is in normal working condition. The second voltage of the second output module needs to be adjusted and the conduction degree of the power regulation module needs to be controlled to increase the second voltage.

[0082] It should be noted that the first threshold and the second threshold are different values, and the specific values ​​are set according to the actual situation, without any restrictions here.

[0083] The intelligent control module controls the conduction level of the power regulation module by analyzing the voltage sampling signal fed back from the output detection module, thereby controlling the first and second voltages and achieving power factor correction. The judgment method is simple and effective.

[0084] In some implementations, such as Figure 2 As shown, the power regulation module includes: a first capacitor, a first resistor, a first diode, a second transformer, a first power transistor, and a second resistor;

[0085] The first terminal of the first capacitor, the first terminal of the first resistor, and the first terminal of the primary winding of the second transformer are all connected to the power module. The second terminal of the first capacitor and the second terminal of the second resistor are all connected to the cathode of the first diode. The anode of the first diode is connected to the second terminal of the primary winding of the second transformer and the drain of the first power transistor. The source of the first power transistor is connected to the intelligent control module and grounded through the second resistor. The gate of the first power transistor is connected to the intelligent control module. The secondary winding of the second transformer is connected to the first output module. The second terminal of the secondary winding of the second transformer is grounded. The auxiliary winding of the second transformer is connected to the second output module.

[0086] In practice, the connection between the power supply module and the power regulation module includes: the first terminal of the first capacitor, the first terminal of the first resistor, and the first terminal of the primary winding of the second transformer in the power regulation module are all connected to the power supply module.

[0087] In practice, the first capacitor, the first resistor, and the first diode form an RCD absorption circuit, which is used to absorb the spike voltage generated by the first power transistor.

[0088] In practice, a driver is connected between the first power transistor and the intelligent control module, and the intelligent control module drives the first power transistor through the driver; preferably, the first power transistor includes an N-channel enhancement-mode MOSFET.

[0089] During implementation, the intelligent control module outputs a first pulse signal to the power regulation module. The gate of the first power transistor is connected to the intelligent control module, and the output current of the drain of the first power transistor is controlled according to the voltage received at the gate of the first power transistor.

[0090] In practice, the output current of the drain of the first power transistor is transmitted to the first diode and the second transformer respectively. A forward voltage is applied to the anode of the first diode. When the forward voltage reaches the preset first forward voltage value, the first diode is turned on, and the current flows through the first diode to the first capacitor. When the voltage across the first capacitor rises to the preset output voltage value, the first capacitor outputs current to the second transformer.

[0091] In practice, the secondary winding of the second transformer is connected to the first output module, the auxiliary winding of the second transformer is connected to the second output module, and the intelligent control module controls the power regulation module to output electrical energy to the first output module and the second output module respectively.

[0092] When the power regulation module receives the first pulse signal output by the intelligent control module, the first capacitor, the first resistor, the first diode, the second transformer, the first power transistor, and the second resistor work together to regulate the first pulse signal and output the regulated current.

[0093] In some implementations, such as Figure 2 As shown, the first output module includes: a second diode and a second capacitor;

[0094] The anode of the second diode is connected to the first terminal of the secondary winding of the second transformer, the cathode of the second diode is connected to the first terminal of the second capacitor and the LED module, and the second terminal of the second capacitor is grounded.

[0095] In practice, the anode of the second diode is connected to the first end of the secondary winding of the second transformer to receive the output current of the second transformer; the cathode of the second diode is connected to the first end of the second capacitor and the LED module. When a forward voltage is applied to the anode of the second diode and reaches a preset second forward voltage value, the second diode is turned on, and the current flows through the second diode to the second capacitor and the LED module.

[0096] The power regulation module adjusts the output current according to the first pulse signal, thereby controlling the first electrical energy output by the first output module, providing a stable pulse current to the LED module, and effectively suppressing the flicker problem.

[0097] In some implementations, such as Figure 2As shown, the second output module includes: a third diode, a second power transistor, a third capacitor, and a fourth diode;

[0098] The anode of the third diode is connected to the anode of the fourth diode, the cathode of the third diode is connected to the drain of the second power transistor, the source of the second power transistor is connected to the first terminal of the third capacitor and the first output module respectively, the second terminal of the third capacitor is connected to the second terminal of the auxiliary winding of the second transformer, and the gate of the second power transistor is connected to the intelligent control module.

[0099] In implementation, the intelligent control module includes a first controller, the gate of the second power transistor is connected to the third IO terminal of the first controller, the intelligent control module controls the off state of the second power transistor, and when the second power transistor is in the off state, the electrical energy in the second diode is released into the second capacitor;

[0100] Preferably, the second power transistor includes an N-channel enhancement-mode MOSFET.

[0101] By turning off the second power transistor, the electrical energy is released from the third diode to the second capacitor. When the current input to the second transformer decreases, the second and third capacitors provide current to the LED module, thereby providing a stable pulse current to the LED module and suppressing the flicker problem.

[0102] In some implementations, such as Figure 2 As shown, the second output module also includes: a fifth diode, a third power transistor, and a fourth capacitor;

[0103] The cathode of the fifth diode is connected to the third terminal of the auxiliary winding of the second transformer, the anode of the fifth diode is connected to the drain of the third power transistor, the source of the third power transistor is connected to the cathode of the fourth diode and the first terminal of the fourth capacitor, the second terminal of the fourth capacitor is connected to the second terminal of the third diode, and the gate of the third power transistor is connected to the intelligent control module.

[0104] In practice, when a forward voltage is applied to the anode of the fourth diode and reaches the preset fourth forward voltage value, the fourth diode is turned on; the gate of the third power transistor is connected to the intelligent control module, and the intelligent control module controls the turn-off state of the third power transistor.

[0105] When the intelligent control module detects that the output power of the first output module is low, it controls the third power transistor to be in the conducting state, and the current is transmitted to the LED module through the third power transistor to achieve power compensation.

[0106] When both the third and second power transistors are off, the current is transmitted to the fourth capacitor through the fourth diode. The fourth capacitor, together with the third capacitor, inputs electrical energy to the LED module, ensuring a constant output current of the first output module.

[0107] Preferably, the third power transistor can be an N-channel enhancement-mode MOSFET.

[0108] By turning off the third power transistor, the third and fourth capacitors are controlled to provide current to the LED module, thereby providing a stable pulse current to the LED module and suppressing the flicker problem.

[0109] In some implementations, such as Figure 2 As shown, the power module includes: an AC power supply, a first transformer, and a first rectifier;

[0110] The AC power supply is connected to the primary winding of the first transformer. The first end of the secondary winding of the first transformer is connected to the first end of the first rectifier. The second end of the secondary winding of the first transformer is connected to the third end of the first rectifier. The second end of the first rectifier is connected to the first end of the primary winding of the second transformer. The fourth end of the first rectifier is grounded.

[0111] In practice, the first end of the first rectifier is connected to the secondary winding of the first transformer, the second end of the first rectifier is connected to the first end of the first capacitor, the first end of the first resistor, and the first end of the primary winding of the second transformer, respectively, the third end of the first rectifier is connected to the second end of the secondary winding of the first transformer, the fourth end of the first rectifier is grounded, and the AC power supply is connected to the primary winding of the first transformer.

[0112] The AC power output from the AC power source is converted into DC power through the first transformer and the first rectifier, which is used to power rechargeable devices.

[0113] In some implementations, such as Figure 3 As shown, the output detection module includes: a third resistor, a fourth resistor, a fifth resistor, a fifth capacitor, a first operational amplifier, a second operational amplifier, and a sixth diode;

[0114] The first output module is connected to the first terminal of the third resistor and the inverting terminal of the second remote terminal, respectively. The second terminal of the third resistor is connected to the non-inverting terminal of the first operational amplifier and grounded through the fourth resistor. The inverting terminal of the first operational amplifier is connected to the cathode of the sixth diode, the first terminal of the fifth capacitor, the non-inverting terminal of the second operational amplifier, and the first terminal of the fifth resistor, respectively. The second terminal of the fifth resistor and the second terminal of the fifth capacitor are both grounded. The output terminal of the second operational amplifier is connected to the intelligent control module.

[0115] In implementation, the intelligent control module includes a first controller; the first end of the third resistor and the inverting input of the second operational amplifier are respectively connected to the first end of the second capacitor in the first output module; the first end of the third resistor is connected to the non-inverting input of the first operational amplifier and grounded through the fourth resistor; the inverting input of the first operational amplifier is connected to the cathode of the sixth diode, the first end of the fifth capacitor, the non-inverting input of the second operational amplifier, and the first end of the fifth resistor; the first end of the fifth resistor and the second end of the fifth capacitor are both grounded; and the output of the second operational amplifier is connected to the fifth IO terminal of the first controller.

[0116] Preferably, the first operational amplifier includes an LM386 chip and an LM356 chip, used to amplify the output signal of the first output module;

[0117] Preferably, the second operational amplifier includes an LM393 chip, used to determine the power output by the first output module and the power required by the LED module.

[0118] By setting up a first operational amplifier and a second operational amplifier, the power output of the first output module is compared with the power required by the LED module. When the power output of the first output module is less than the power required by the LED module, the intelligent control module and the power adjustment module work together to adjust the output power of the first output module. At the same time, the second output module is controlled to provide current to the LED module, so as to provide a stable pulse current to the LED module and suppress the flicker problem.

[0119] In some implementations, such as Figure 4 As shown, the output detection module also includes: a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, and an eleventh resistor;

[0120] The first end of the sixth resistor is connected to the first output module, and the second end of the sixth resistor is connected to the first end of the eleventh resistor and the intelligent control module. The first end of the seventh resistor is connected to the second output module, and the second end of the seventh resistor is connected to the first end of the ninth resistor and the intelligent control module. The first end of the eighth resistor is connected to the second output module, and the second end of the eighth resistor is connected to the first end of the tenth resistor and the intelligent control module.

[0121] In implementation, the intelligent control module includes a first controller; the first end of the sixth resistor is connected to the first end of the second capacitor in the first output module, the first end of the seventh resistor is connected to the first end of the third capacitor in the second output module, the first end of the eighth resistor is connected to the second end of the fourth capacitor in the second output module, the second end of the sixth resistor is connected to the sixth I / O terminal of the first controller and the first end of the eleventh resistor respectively, the second end of the seventh resistor is connected to the seventh I / O terminal of the first controller and the first end of the ninth resistor respectively, the second end of the eighth resistor is connected to the eighth I / O terminal of the first controller and the first end of the tenth resistor respectively, and the second ends of the tenth resistor, the ninth resistor and the eleventh resistor are all grounded.

[0122] In practice, the sixth and eleventh resistors, the seventh and ninth resistors, and the eighth and tenth resistors form three-way resistor voltage divider circuits to sample the electrical energy of the second, third, and fourth capacitors, respectively.

[0123] The output detection module is used to detect the output power of the first output module and the second output module. By setting the sixth, seventh, eighth, ninth, tenth and eleventh resistors, the power of the second, third and fourth capacitors can be detected. The intelligent control module controls the power adjustment module according to the detected power value.

[0124] In some implementations, the intelligent control module includes: a first controller.

[0125] In practice, the first controller includes a DSP chip.

[0126] In one specific embodiment, the first transformer and the first rectifier convert the AC power output from the AC power supply into DC power. The voltage of the second capacitor is sampled by the sixth resistor and the eleventh resistor and transmitted to the intelligent control module. At the same time, the current of the second resistor is sampled and transmitted to the intelligent control module. The intelligent control module adjusts the pulse signal value output by the first I / O terminal of the first controller according to the voltage sample value of the second capacitor and the current sample value of the second resistor, so as to adjust the conduction angle of the first power transistor, control the power output of the second transformer, and transmit it to the LED module through the second diode to control the working state of the LED module.

[0127] Simultaneously, the conduction level of the second power transistor is controlled by the third I / O terminal of the first controller. By turning off the second power transistor, the electrical energy is released from the third diode to the second capacitor. When the current input to the second transformer decreases, the second and third capacitors provide current to the LED module. The first and second operational amplifiers detect the frequency of the electrical energy output by the first output module. When the power output of the first output module is low, the third power transistor is controlled to perform electrical energy compensation. When both the third and second power transistors are off, the electrical energy is transferred to the fourth capacitor through the aforementioned fourth diode. Together with the third capacitor, the output current of the first output module is kept constant. While performing power factor correction, the electrical energy input to the LED module is ensured, and the flickering phenomenon of the LED module is avoided.

[0128] The specific embodiments described above are preferred embodiments of a high power factor intelligent power supply circuit of the present invention, and are not intended to limit the specific scope of the present invention. The scope of the present invention includes, but is not limited to, these specific embodiments. All equivalent changes made in accordance with the shape and structure of the present invention are within the protection scope of the present invention.

Claims

1. A high power factor intelligent power supply circuit, characterized in that, include: Power supply module, power regulation module, first output module, second output module, output detection module, intelligent control module, and LED module; The intelligent control module is connected to the power adjustment module, the second output module and the output detection module respectively, and is used to control the power adjustment module to adjust the first voltage received by the first output module and the second voltage received by the second output module according to the voltage sampling signal output by the output detection module. The power regulation module is connected to the power supply module, the first output module, and the second output module, respectively. The first output module is connected to both the output detection module and the LED module. The second output module is connected to both the output detection module and the LED module. The intelligent control module is configured as follows: The voltage sampling signal is received, and the conduction level of the power regulation module is controlled according to the voltage sampling signal to achieve power factor correction; The step of controlling the conduction level of the power regulation module based on the voltage sampling signal to achieve power factor correction includes: After receiving the voltage sampling signal, the intelligent control module determines whether the voltage sampling signal is lower than the first threshold. If so, determine whether the first voltage is lower than the second threshold; If so, the conduction level of the power regulation module is controlled to increase the first voltage; If not, then control the conduction level of the power regulation module to increase the second voltage; The power regulation module includes: a first capacitor, a first resistor, a first diode, a second transformer, a first power transistor, and a second resistor; The first terminal of the first capacitor, the first terminal of the first resistor, and the first terminal of the primary winding of the second transformer are all connected to the power module. The second terminal of the first capacitor and the second terminal of the second resistor are all connected to the cathode of the first diode. The anode of the first diode is connected to the second terminal of the primary winding of the second transformer and the drain of the first power transistor. The source of the first power transistor is connected to the intelligent control module and grounded through the second resistor. The gate of the first power transistor is connected to the intelligent control module. The secondary winding of the second transformer is connected to the first output module. The second terminal of the secondary winding of the second transformer is grounded. The auxiliary winding of the second transformer is connected to the second output module. The first output module includes: a second diode and a second capacitor; The anode of the second diode is connected to the first terminal of the secondary winding of the second transformer, the cathode of the second diode is connected to the first terminal of the second capacitor and the LED module, and the second terminal of the second capacitor is grounded. The second output module includes: a third diode, a second power transistor, a third capacitor, and a fourth diode; The anode of the third diode is connected to the anode of the fourth diode, the cathode of the third diode is connected to the drain of the second power transistor, the source of the second power transistor is connected to the first terminal of the third capacitor and the first output module, the second terminal of the third capacitor is connected to the second terminal of the auxiliary winding of the second transformer, and the gate of the second power transistor is connected to the intelligent control module.

2. The high power factor intelligent power supply circuit according to claim 1, characterized in that, The second output module also includes: a fifth diode, a third power transistor, and a fourth capacitor; The cathode of the fifth diode is connected to the third terminal of the auxiliary winding of the second transformer, the anode of the fifth diode is connected to the drain of the third power transistor, the source of the third power transistor is connected to the cathode of the fourth diode and the first terminal of the fourth capacitor, the second terminal of the fourth capacitor is connected to the second terminal of the third diode, and the gate of the third power transistor is connected to the intelligent control module.

3. The high power factor intelligent power supply circuit according to claim 1, characterized in that, The power module includes: an AC power supply, a first transformer, and a first rectifier; The AC power supply is connected to the primary winding of the first transformer, the first end of the secondary winding of the first transformer is connected to the first end of the first rectifier, the second end of the secondary winding of the first transformer is connected to the third end of the first rectifier, the second end of the first rectifier is connected to the first end of the primary winding of the second transformer, and the fourth end of the first rectifier is grounded.

4. The high power factor intelligent power supply circuit according to claim 1, characterized in that, The output detection module includes: a third resistor, a fourth resistor, a fifth resistor, a fifth capacitor, a first operational amplifier, a second operational amplifier, and a sixth diode; The first output module is connected to the first terminal of the third resistor and the inverting terminal of the second operational amplifier, respectively. The second terminal of the third resistor is connected to the non-inverting terminal of the first operational amplifier and grounded through the fourth resistor. The inverting terminal of the first operational amplifier is connected to the cathode of the sixth diode, the first terminal of the fifth capacitor, the non-inverting terminal of the second operational amplifier, and the first terminal of the fifth resistor, respectively. The second terminal of the fifth resistor and the second terminal of the fifth capacitor are both grounded. The output terminal of the second operational amplifier is connected to the intelligent control module.

5. The high power factor intelligent power supply circuit according to claim 4, characterized in that, The output detection module further includes: a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, and an eleventh resistor; The first end of the sixth resistor is connected to the first output module, the second end of the sixth resistor is connected to the first end of the eleventh resistor and the intelligent control module, the first end of the seventh resistor is connected to the second output module, the second end of the seventh resistor is connected to the first end of the ninth resistor and the intelligent control module, the first end of the eighth resistor is connected to the second output module, and the second end of the eighth resistor is connected to the first end of the tenth resistor and the intelligent control module.

6. The high power factor intelligent power supply circuit according to claim 1, characterized in that, The intelligent control module includes: a first controller.

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