A MCU power management circuit

Abstract

The present invention discloses an MCU power management circuit, which relates to the field of power management technology and includes a voltage stabilization control module for rectification and voltage stabilization; an intelligent control module for receiving signals and controlling module operation; an isolation drive module for isolating transmission signals and signal amplification processing; a standby control module for controlling a capacitor circuit through a switch circuit to perform standby control; a processing protection module for filtering and voltage spike absorption protection; a voltage regulation module for voltage stabilization and regulation; an output processing module for output boost and rectification processing; and an output sampling module for voltage sampling. The MCU power management circuit of the present invention adopts a flyback switching power supply circuit controlled by the intelligent control module, which cooperates with the output processing module and the output sampling module to perform output regulation and output feedback, thereby realizing intelligent power management control. At the same time, the standby control module can realize intelligent low-power standby control of the power module without unplugging the power supply.

Description

Technical Field

[0001] The present invention relates to the technical field of power management, in particular to an MCU power management circuit. Background Art

[0002] With the development of electronic technology and information technology, in order to meet the power supply needs of electrical equipment, its power management circuit is also constantly developing in the direction of intelligence. Most of the existing power management circuits use a flyback switching power supply circuit with a traditional analog pulse width modulation chip as the core to complete the control and output of the regulated voltage. It can only perform simple voltage regulation control and has a low upper limit of use. In addition, when the electrical equipment cannot be powered, low-power standby control cannot be achieved. The only way is to stop providing power to the electrical equipment by turning off the power supply, which is relatively troublesome and needs to be improved. Summary of the Invention

[0003] An embodiment of the present invention provides an MCU power management circuit to solve the problems raised in the above background technology.

[0004] According to an embodiment of the present invention, an MCU power management circuit is provided, which includes: a power supply module, a voltage regulation control module, a standby control module, a processing and protection module, a voltage regulation module, an intelligent control module, an isolation drive module, an output processing module, and an output sampling module;

[0005] The power supply module is used to provide AC power to the circuit and perform voltage reduction processing on the AC power;

[0006] The voltage stabilization control module is connected to the power module and is used to rectify and stabilize the electric energy output by the power module through a rectifier and voltage stabilization circuit and transmit it to the voltage regulation module and the intelligent control module;

[0007] The intelligent control module is connected to the voltage stabilization control module, the voltage regulation module and the output sampling module, and is used to receive the signals output by the voltage regulation module and the output sampling module and generate a pulse signal for outputting a standby control signal;

[0008] The isolation drive module is connected to the intelligent control module and is used to isolate, transmit and amplify the standby control signal through the isolation transmission circuit and the triode amplifier circuit;

[0009] The standby control module is connected to the power module and the drive control module, and is used to receive the signal output by the isolation drive module and control the operation of the capacitor circuit through the switch circuit, and is used to perform standby control on the power module and control the transmission of electric energy through the capacitor circuit;

[0010] The processing and protection module is connected to the standby control module and is used to filter the electric energy output by the standby control module, transmit the electric energy to the voltage regulation module and absorb voltage spikes in the circuit;

[0011] The voltage regulation module is connected to the processing protection module and the voltage stabilization control module, and is used to improve the driving capability of the pulse signal and drive the conduction degree of the power tube circuit through the driving circuit, and is used to sample the working current of the power tube circuit and output the current signal, and is used to stabilize and regulate the input electric energy and output it;

[0012] The output processing module is connected to the voltage regulating module and is used to rectify and filter the electric energy output by the voltage regulating module and output the electric energy;

[0013] The output sampling module is connected to the output processing module and is used to sample the voltage of the electric energy output by the output processing module and transmit the voltage to the intelligent control module.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the MCU power management circuit of the present invention forms a flyback switching power supply circuit through an intelligent control module and a voltage regulation module, and cooperates with an output processing module and an output sampling module to perform output regulation and output feedback, thereby realizing intelligent power management control. At the same time, the standby control module can realize intelligent low-power standby control of the power module without unplugging the power supply, thereby improving the intelligence of electric energy, and the circuit has strong applicability and is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 The present invention provides a block diagram of the principle of an MCU power management circuit.

[0017] Figure 2 A circuit diagram of an MCU power management circuit provided by an example of the present invention.

[0018] Figure 3 This is a connection circuit diagram of the isolation drive module and the standby control module provided by an example of the present invention. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example 1, please refer to Figure 1 , an MCU power management circuit includes: a power supply module 1, a voltage regulation control module 2, a standby control module 3, a processing and protection module 4, a voltage regulation module 5, an intelligent control module 6, an isolation drive module 7, an output processing module 8, and an output sampling module 9;

[0021] Specifically, the power module 1 is used to provide AC power to the circuit and perform voltage reduction processing on the AC power;

[0022] The voltage stabilization control module 2 is connected to the power module 1 and is used to rectify and stabilize the electric energy output by the power module 1 through a rectifier and voltage stabilization circuit and transmit it to the voltage regulation module 5 and the intelligent control module 6;

[0023] an intelligent control module 6 connected to the voltage stabilization control module 2, the voltage regulation module 5 and the output sampling module 9, for receiving the signals output by the voltage regulation module 5 and the output sampling module 9 and generating a pulse signal for outputting a standby control signal;

[0024] An isolation drive module 7 is connected to the intelligent control module 6 and is used to isolate, transmit and amplify the standby control signal through an isolation transmission circuit and a transistor amplifier circuit;

[0025] A standby control module 3 is connected to the power module 1 and the drive control module, and is used to receive the signal output by the isolation drive module 7 and control the operation of the capacitor circuit through the switch circuit, so as to perform standby control on the power module 1 and control the transmission of electric energy through the capacitor circuit;

[0026] a processing and protection module 4 connected to the standby control module 3, for filtering the electric energy output by the standby control module 3, for transmitting the electric energy to the voltage regulation module 5 and absorbing voltage spikes in the circuit;

[0027] a voltage regulating module 5 connected to the processing protection module 4 and the voltage stabilization control module 2, for improving the driving capability of the pulse signal and driving the conduction degree of the power tube circuit through the driving circuit, for sampling the working current of the power tube circuit and outputting a current signal, and for stabilizing and outputting the input electric energy;

[0028] An output processing module 8, connected to the voltage regulating module 5, for rectifying and filtering the electric energy output by the voltage regulating module 5 and outputting the electric energy;

[0029] The output sampling module 9 is connected to the output processing module 8 and is used to sample the voltage of the electric energy output by the output processing module 8 and transmit the voltage to the intelligent control module 6 .

[0030] In a specific embodiment, the power supply module 1 can adopt an AC power supply, which will not be described in detail; the voltage stabilization control module 2 can adopt a rectifier circuit and a voltage stabilization circuit for rectification and voltage stabilization; the standby control module 3 can adopt a capacitor circuit, a switch circuit and a rectifier circuit, and the switch circuit triggers the capacitor circuit to perform standby control, and the rectifier circuit converts AC power into DC power; the processing protection module 4 can adopt a rectifier filter circuit and an RCD absorption circuit, and the rectifier filter circuit performs rectification and filtering processing, and then the RCD absorption circuit absorbs the peak voltage generated when the voltage regulation module 5 works; the voltage regulation module 5 can adopt a drive circuit, a power tube circuit, a transformer circuit and a current sampling circuit, through The overdrive circuit provides the driving capability of the input signal in order to control the conduction angle of the power tube circuit. The conduction angle of the power tube circuit adjusts the voltage regulation degree of the transformer circuit, and the current sampling circuit samples the working current of the power tube circuit. The above-mentioned intelligent control module 6 can adopt an MCU controller to receive and process signals and control the operation of each module. The above-mentioned isolation drive module 7 can adopt an isolation transmission circuit and a transistor amplifier circuit. The isolation transmission circuit isolates and transmits the standby control signal, and then the transistor amplifier circuit amplifies the signal. The above-mentioned output processing module 8 adopts a half-bridge rectifier circuit and a filter circuit for rectification and filtering. The above-mentioned output sampling module 9 can adopt a resistor voltage divider circuit for voltage sampling.

[0031] Example 2, based on Example 1, please refer to Figure 2 and Figure 3 The power supply module 1 includes an AC source and a first transformer W1; the voltage stabilization control module 2 includes a second rectifier T2, a first voltage stabilizer IC1, a second capacitor C2, and a third capacitor C3;

[0032] Specifically, the AC source is connected to the primary winding of the first transformer W1, the first end of the secondary winding of the first transformer W1 is connected to the standby control module 3 and the first end of the second rectifier T2, the second end of the secondary winding of the first transformer W1 is connected to the third end of the second rectifier T2, the second end of the second rectifier T2 is grounded, the fourth end of the second rectifier T2 is connected to the first end of the first voltage regulator IC1 and is connected to the ground through the second capacitor C2, the third end of the first voltage regulator IC1 is connected to the intelligent control module 6 and the voltage regulation module 5 and the third capacitor C3 is connected to the second end of the first voltage regulator IC1 and the ground.

[0033] In a specific embodiment, the first voltage regulator IC1 can be a 7805 three-terminal voltage regulator chip.

[0034] Furthermore, the standby control module 3 includes an eighth capacitor C8, a first rectifier T1, and a first transistor SCR1;

[0035] Specifically, the first end of the eighth capacitor C8 is connected to the first end of the secondary winding of the first transformer W1 and the third end of the first rectifier T1, the second end of the eighth capacitor C8 is connected to the processing and protection module 4 and the first end of the first rectifier T1, the fourth end of the first rectifier T1 is connected to the anode of the first transistor SCR1, the cathode of the first transistor SCR1 is connected to the second end of the first rectifier T1, and the control end of the first transistor SCR1 is connected to the isolation drive module 7.

[0036] In a specific embodiment, the eighth capacitor C8 is an impedance component used as an AC path for the primary winding of the first transformer W1; the first transistor SCR1 can be a single-phase thyristor used to control the short circuit of the eighth capacitor C8, and the specific model is not limited.

[0037] Furthermore, the processing and protection module 4 includes a first inductor L1, a first capacitor C1, a fourth resistor R4, a fifth capacitor C5, and a first diode D1;

[0038] Specifically, one end of the first inductor L1 is connected to the second end of the eighth capacitor C8, the other end of the first inductor L1 is connected to one end of the fourth resistor R4 and the first end of the fifth capacitor C5 and is connected to the ground through the first capacitor C1, the fourth resistor R4 is connected to the cathode of the first diode D1 and the second end of the fifth capacitor C5, and the anode of the first diode D1 is connected to the voltage regulation module 5.

[0039] In a specific embodiment, the first inductor L1 and the first capacitor C1 form an LC filter circuit for filtering; the fourth resistor R4, the fifth capacitor C5 and the first diode D1 form an RCD absorption circuit for absorbing peak voltage in the circuit.

[0040] Furthermore, the voltage regulating module 5 includes a second transformer W2, a first power tube Q1, a second resistor R2, a third resistor R3, a first resistor R1, a fourth capacitor C4, a fifth resistor R5, and a first driver U1;

[0041] Specifically, the first end of the primary winding of the second transformer W2 is connected to the first end of the fifth capacitor C5, the second end of the primary winding of the second transformer W2 is connected to the anode of the first diode D1 and the drain of the first power tube Q1, the source of the first power tube Q1 is connected to the ground through the fifth resistor R5, the gate of the first power tube Q1 is connected to the ninth end of the first driver U1 through the second resistor R2, the eighth end of the first driver U1 is connected to the seventh end of the first driver U1 and the ground through the third resistor R3, the sixth end of the first driver U1 is connected to the ground through the first resistor R1, the fifth end of the first driver U1 is connected to the fourth end of the first driver U1 and the ground through the fourth capacitor C4, the third end of the first driver U1 is connected to the intelligent control module 6, and the tenth end of the first driver U1 is connected to the third end of the first voltage regulator IC1.

[0042] In a specific embodiment, the first power transistor Q1 may be an N-channel enhancement mode MOS transistor for adjusting the voltage output by the second transformer W2; the first driver U1 may be an MC33060 for improving the driving capability of the input signal.

[0043] Furthermore, the output processing module 8 includes a sixth capacitor C6, a third diode D3, a second diode D2, a seventh capacitor C7 and an output port;

[0044] Specifically, one end of the sixth capacitor C6 is connected to the second end of the secondary winding of the second transformer W2, the anode of the third diode D3 is connected to the first end of the secondary winding of the second transformer W2 and the output port and is connected to the ground end and the cathode of the second diode D2 through the seventh capacitor C7, and the anode of the second diode D2 is connected to the cathode of the third diode D3 and the other end of the sixth capacitor C6.

[0045] In a specific embodiment, the sixth capacitor C6, the third diode D3, the second diode D2 and the seventh capacitor C7 form a double voltage rectification and filtering circuit.

[0046] Furthermore, the output sampling module 9 includes a sixth resistor R6 and a seventh resistor R7;

[0047] Specifically, one end of the sixth resistor R6 is connected to the first end of the secondary winding of the second transformer W2, the other end of the sixth resistor R6 is connected to the first end of the seventh resistor R7 and the intelligent control module 6, and the second end of the seventh resistor R7 is grounded.

[0048] In a specific embodiment, the seventh resistor R7 and the sixth resistor R6 form a resistor voltage divider circuit to implement output voltage sampling.

[0049] Furthermore, the intelligent control module 6 includes a first controller U2;

[0050] Specifically, the power supply end of the first controller U2 is connected to the third end of the first voltage regulator IC1, the first IO end of the first controller U2 is connected to the third end of the first driver U1, the second IO end of the first controller U2 is connected to the source of the first power tube Q1, and the third IO end of the first controller U2 is connected to the first end of the seventh resistor R7.

[0051] In a specific embodiment, the first controller U2 may use an MCU chip, specifically, but not limited to, an MC68HC908 chip, which adjusts the output pulse signal by sampling the voltage signal and the current signal to achieve voltage regulation of the power supply.

[0052] Furthermore, the isolation driving module 7 includes a first power supply VCC1, a thirteenth resistor R13, a first optical coupler U3, a twelfth resistor R12, a second power supply VCC2, an eleventh resistor R11, a ninth capacitor C9, and a tenth resistor R10;

[0053] Specifically, the first power supply VCC1 is connected to the first end of the first optocoupler U3 through the thirteenth resistor R13, the second end of the first optocoupler U3 is connected to the fourth IO terminal of the first controller U2, the second power supply VCC2 is connected to the third end of the first optocoupler U3 through the twelfth resistor R12, the fourth end of the first optocoupler U3 is connected to the first end of the tenth resistor R10 and one end of the ninth capacitor C9 and is connected to the other end of the ninth capacitor C9 and the ground through the eleventh resistor R11.

[0054] In a specific embodiment, the first optical coupler U3 can be a PC817 photoelectric coupler.

[0055] Furthermore, the isolation driving module 7 further includes a second switch tube VT2, a first switch tube VT1, an eighth resistor R8, and a ninth resistor R9;

[0056] Specifically, the base of the second switching tube VT2 is connected to the second end of the tenth resistor R10, the collector of the second switching tube VT2 is connected to the collector of the first switching tube VT1 and is connected to the anode of the first transistor SCR1 through the eighth resistor R8, the emitter of the second switching tube VT2 is connected to the base of the first switching tube VT1 and is connected to the cathode of the first transistor SCR1 through the ninth resistor R9, and the emitter of the first switching tube VT1 is connected to the control end of the first transistor SCR1.

[0057] In a specific embodiment, both the second switching tube VT2 and the first switching tube VT1 can be NPN transistors, which amplify the input signal to drive the first transistor SCR1 to be turned off.

[0058] The present invention provides an MCU power management circuit with the required AC power provided by the power module 1. The AC power is rectified and stabilized by the second rectifier T2 and the first voltage regulator IC1 to provide the required DC power for the first controller U2 and the first driver U1. When standby control is not required, the fourth IO terminal of the first controller U2 controls the first optocoupler U3 to turn on, so that the signal transmitted by the first optocoupler U3 is amplified by the first switch tube VT1 and the second switch tube VT2 and drives the first transistor SCR1 to turn on, so that the eighth capacitor C8 is short-circuited, and the AC source is transmitted to the first inductor L1 and the first capacitor C1 for filtering. At this time, the first controller U2 samples the voltage according to the fifth resistor R5. The flow signal, the voltage signal sampled by the sixth resistor R6 and the seventh resistor R7 generates the required pulse signal, which is processed by the first driver U1 to control the conduction degree of the first power tube Q1, and then control the output voltage of the second transformer W2 to achieve voltage regulation. At the same time, the output voltage is further raised by the sixth capacitor C6, the third diode D3, the second diode D2 and the seventh capacitor C7, and output by the output port. When standby control is required, the fourth IO terminal of the first controller U2 controls the first optocoupler U3 to be cut off, so that the first transistor SCR1 is cut off, and the eighth capacitor C8 reduces the current that can be transmitted by the first transformer W1, thereby achieving standby control.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0060] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An MCU power management circuit, characterized in that: The MCU power management circuit includes: power module, voltage regulation control module, standby control module, processing protection module, voltage regulation module, intelligent control module, isolation drive module, output processing module, output sampling module; The power supply module is used to provide AC power to the circuit and perform voltage reduction processing on the AC power; The voltage stabilization control module is connected to the power module and is used to rectify and stabilize the electric energy output by the power module through a rectifier and voltage stabilization circuit and transmit it to the voltage regulation module and the intelligent control module; The intelligent control module is connected to the voltage stabilization control module, the voltage regulation module and the output sampling module, and is used to receive the signals output by the voltage regulation module and the output sampling module and generate a pulse signal for outputting a standby control signal; The isolation drive module is connected to the intelligent control module and is used to isolate, transmit and amplify the standby control signal through the isolation transmission circuit and the triode amplifier circuit; The standby control module is connected to the power module and the drive control module, and is used to receive the signal output by the isolation drive module and control the operation of the capacitor circuit through the switch circuit, and is used to perform standby control on the power module and control the transmission of electric energy through the capacitor circuit; The processing and protection module is connected to the standby control module and is used to filter the electric energy output by the standby control module, transmit the electric energy to the voltage regulation module and absorb voltage spikes in the circuit; The voltage regulation module is connected to the processing protection module and the voltage stabilization control module, and is used to improve the driving capability of the pulse signal and drive the conduction degree of the power tube circuit through the driving circuit, and is used to sample the working current of the power tube circuit and output the current signal, and is used to stabilize and regulate the input electric energy and output it; The output processing module is connected to the voltage regulating module and is used to rectify and filter the electric energy output by the voltage regulating module and output the electric energy; The output sampling module is connected to the output processing module and is used to sample the voltage of the electric energy output by the output processing module and transmit it to the intelligent control module; The power supply module includes an AC source and a first transformer; the voltage stabilization control module includes a second rectifier, a first voltage stabilizer, a second capacitor, and a third capacitor; The AC source 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 standby control module and the first end of the second rectifier, the second end of the secondary winding of the first transformer is connected to the third end of the second rectifier, the second end of the second rectifier is grounded, the fourth end of the second rectifier is connected to the first end of the first voltage regulator and is connected to the ground end through the second capacitor, the third end of the first voltage regulator is connected to the intelligent control module and the voltage regulation module, and the third capacitor is connected to the second end of the first voltage regulator and the ground end; The voltage regulation module includes a second transformer, a first power tube, a second resistor, a third resistor, a first resistor, a fourth capacitor, a fifth resistor, and a first driver; The first end of the primary winding of the second transformer is connected to the first end of the fifth capacitor, the second end of the primary winding of the second transformer is connected to the anode of the first diode and the drain of the first power tube, the source of the first power tube is connected to the ground through the fifth resistor, the gate of the first power tube is connected to the ninth end of the first driver through the second resistor, the eighth end of the first driver is connected to the seventh end of the first driver and the ground through the third resistor, the sixth end of the first driver is connected to the ground through the first resistor, the fifth end of the first driver is connected to the fourth end of the first driver and the ground through the fourth capacitor, the third end of the first driver is connected to the intelligent control module, and the tenth end of the first driver is connected to the third end of the first regulator; The intelligent control module includes a first controller; the power supply end of the first controller is connected to the third end of the first voltage regulator, the first IO end of the first controller is connected to the third end of the first driver, the second IO end of the first controller is connected to the source of the first power tube, and the third IO end of the first controller is connected to the first end of the seventh resistor.

2. The MCU power management circuit according to claim 1, characterized in that: The standby control module includes an eighth capacitor, a first rectifier, and a first transistor; The first end of the eighth capacitor is connected to the first end of the secondary winding of the first transformer and the third end of the first rectifier, the second end of the eighth capacitor is connected to the processing and protection module and the first end of the first rectifier, the fourth end of the first rectifier is connected to the anode of the first transistor, the cathode of the first transistor is connected to the second end of the first rectifier, and the control end of the first transistor is connected to the isolation drive module.

3. The MCU power management circuit according to claim 2, characterized in that: The processing protection module includes a first inductor, a first capacitor, a fourth resistor, a fifth capacitor, and a first diode; One end of the first inductor is connected to the second end of the eighth capacitor, the other end of the first inductor is connected to one end of the fourth resistor and the first end of the fifth capacitor and is connected to the ground through the first capacitor, the fourth resistor is connected to the cathode of the first diode and the second end of the fifth capacitor, and the anode of the first diode is connected to the voltage regulation module.

4. The MCU power management circuit according to claim 3, characterized in that: The output processing module includes a sixth capacitor, a third diode, a second diode, a seventh capacitor and an output port; One end of the sixth capacitor is connected to the second end of the secondary winding of the second transformer, the anode of the third diode is connected to the first end of the secondary winding of the second transformer and the output port and is connected to the ground and the cathode of the second diode through the seventh capacitor, and the anode of the second diode is connected to the cathode of the third diode and the other end of the sixth capacitor.

5. The MCU power management circuit according to claim 4, characterized in that: The output sampling module includes a sixth resistor and a seventh resistor; One end of the sixth resistor is connected to the first end of the secondary winding of the second transformer, the other end of the sixth resistor is connected to the first end of the seventh resistor and the intelligent control module, and the second end of the seventh resistor is grounded.

6. The MCU power management circuit according to claim 5, characterized in that: The isolation driving module includes a first power supply, a thirteenth resistor, a first optical coupler, a twelfth resistor, a second power supply, an eleventh resistor, a ninth capacitor, and a tenth resistor; The first power supply is connected to the first end of the first optocoupler through the thirteenth resistor, the second end of the first optocoupler is connected to the fourth IO terminal of the first controller, the second power supply is connected to the third end of the first optocoupler through the twelfth resistor, the fourth end of the first optocoupler is connected to the first end of the tenth resistor and one end of the ninth capacitor and is connected to the other end of the ninth capacitor and the ground through the eleventh resistor.

7. The MCU power management circuit according to claim 6, characterized in that: The isolation driving module further includes a second switch tube, a first switch tube, an eighth resistor, and a ninth resistor; The base of the second switching tube is connected to the second end of the tenth resistor, the collector of the second switching tube is connected to the collector of the first switching tube and is connected to the anode of the first transistor through the eighth resistor, the emitter of the second switching tube is connected to the base of the first switching tube and is connected to the cathode of the first transistor through the ninth resistor, and the emitter of the first switching tube is connected to the control end of the first transistor.

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