Circuit structure for reducing power consumption during standby of MCU (Microprogrammed Control Unit)

Abstract

The utility model provides a circuit structure for reducing power consumption when an MCU is in a standby state. The circuit structure comprises an AC-DC power supply module, a master control MCU module, a motor driving module and an RF wireless remote control receiving module. The AC-DC power supply module is respectively connected with the power supply end of the main control MCU module, the power supply end of the motor driving module and the power supply end of the RF wireless remote control receiving module; the control end of the main control MCU module is connected with the controlled end of the motor driving module. The master control MCU module controls a second pin IR end to be connected with an IR end of the RF wireless remote control receiving module; the AC-DC power supply module is used for converting AC (Alternating Current) into 24V low-voltage DC; the main control MCU module is used for processing remote control signals, driving a motor and controlling light; the motor driving module is used for driving the direct-current brushless motor; the RF wireless remote control receiving module is used for receiving an RF signal and outputting the signal to the main control MCU module; the power consumption can be effectively reduced.

Description

Technical Field

[0001] This utility model belongs to the field of electronic circuit technology, and specifically relates to a circuit structure for reducing power consumption of MCU during standby. Background Technology

[0002] According to the new eco-design guidelines, the power consumption requirements for power-off mode, standby mode, and network standby of home and office electronic and electrical equipment include limits on system standby power consumption to 0.5W starting in 2025 and 0.3W in 2027. Currently, most hardware circuit designs struggle to reduce standby power consumption to meet the new eco-design regulations. Therefore, MCUs (microcontrollers) also need to reduce power consumption. MCU solution manufacturers typically provide various MCU operating power modes, which can be categorized from highest to lowest power consumption as normal operating mode, power-off mode, sleep mode, and deep sleep mode. However, MCU power reduction design needs to be tailored to different application scenarios. For applications with wake-up triggers, such as button operations or sensor output signals, the MCU can directly enter deep sleep mode, using external signal changes to determine whether to wake it up. Currently, ARM-M0 MCUs operating at 3.3V draw approximately tens of milliamps, with deep sleep mode consuming as little as microamps.

[0003] Many key application scenarios lack wake-up conditions. For example, in fan and light controller applications, the controller operates the fan and light via remote control, using the RF-433.92MHz radio frequency signal. Current RF-433.92MHz receiver chips exhibit irregular noise in idle standby mode due to environmental factors, preventing the MCU from being woken up by high / low level changes when entering low power mode. Current market products typically address low power consumption by adding low-power OTP chips, increasing costs. Therefore, it is necessary to propose a circuit structure to reduce MCU power consumption in standby mode, at least partially solving the problems existing in current technologies. Utility Model Content

[0004] To at least partially solve the above problems, this utility model provides a circuit structure for reducing power consumption of an MCU during standby, including: an AC-DC power supply module, a main control MCU module, a motor drive module, and an RF wireless remote control receiver module;

[0005] The AC-DC power supply module is connected to the power supply terminals of the main control MCU module, the motor drive module, and the RF wireless remote control receiver module, respectively. The control terminal of the main control MCU module is connected to the controlled terminal of the motor drive module. The IR terminal of the control pin 2 of the main control MCU module is connected to the IR terminal of the RF wireless remote control receiver module. The AC-DC power supply module converts AC power into 24V low-voltage DC power. The main control MCU module processes remote control signals, drives the motor, and controls the lights. The motor drive module drives the brushless DC motor. The RF wireless remote control receiver module receives RF signals and outputs signals to the main control MCU module.

[0006] Preferably, the AC-DC power module includes: a DB1 rectifier bridge, a U2 power chip, an electrolytic capacitor CD1, an electrolytic capacitor CD4, an electrolytic capacitor CD2, an electrolytic capacitor CD3, a Q1 MOSFET, a D1 Schottky diode, a T2 transformer, and a CX1 capacitor; the AC1 terminal of the DB1 rectifier bridge is connected to ACL_AF, pin 4 of the T2 transformer, and one end of the CX1 capacitor; the AC2 terminal of the DB1 rectifier bridge is connected to ACN_AF, pin 2 of the T2 transformer, and the other end of the CX1 capacitor; the DC+ terminal of the DB1 rectifier bridge is connected to the positive terminals of the CD1 and CD4 electrolytic capacitors; the DC- terminal of the DB1 rectifier bridge is connected to the negative terminals of the CD1 and CD4 electrolytic capacitors; the positive terminals of the CD2 and CD3 electrolytic capacitors are connected in parallel to the +24V power supply terminal and the negative terminal of the D1 Schottky diode; the positive terminals of the CD2 and CD3 electrolytic capacitors are grounded.

[0007] Preferably, the main control MCU module includes: a U6 main control MCU, a C14 surface mount capacitor, a C15 surface mount capacitor, and a C19 surface mount capacitor; pin 1 AVDD of the U6 main control MCU is connected in parallel with one end of the C14 surface mount capacitor to a +5V power supply; pin 7 of the U6 main control MCU is connected to one end of the C15 surface mount capacitor; pin 8 of the U6 main control MCU is connected to one end of the C19 surface mount capacitor and a +24V power supply; the other ends of the C14, C15, and C19 surface mount capacitors are grounded.

[0008] Preferably, the motor drive module includes: a Q3-N+P-MOS transistor, a Q5-N+P-MOS transistor, a Q6-N+P-MOS transistor, an RS5 resistor, an RS6 resistor, an RS7 resistor, an R25 resistor, an R26 resistor, an R27 resistor, an R29 resistor, an R34 resistor, an R36 resistor, an R37 resistor, an R38 resistor, an R39 resistor, an R40 resistor, an R41 resistor, and an R44 resistor; the first pin of the Q3-N+P-MOS transistor is connected in parallel to one end of the RS5 resistor, one end of the RS6 resistor, and one end of the RS7 resistor; the first pin of the Q5-N+P-MOS transistor is connected in parallel to the other end of the RS5 resistor and one end of the R38 resistor; the first pin of the Q6-N+P-MOS transistor is connected in parallel to the other end of the RS6 resistor and one end of the R44 resistor; the fourth pin of the Q3-N+P-MOS transistor is connected in parallel to one end of the R25 resistor; One end of resistor R26; pin 4 of Q5-N+P-MOS transistor connected in parallel to one end of resistor R34 and one end of resistor R36; pin 4 of Q6-N+P-MOS transistor connected in parallel to one end of resistor R39 and one end of resistor R40; pin 3 of Q3-N+P-MOS transistor connected in parallel to the other end of resistor R26 and the +24V power supply terminal; pin 3 of Q5-N+P-MOS transistor connected in parallel to the other end of resistor R36 and the +24V power supply terminal; pin 3 of Q6-N+P-MOS transistor connected in parallel to the other end of resistor R40 and the +24V power supply terminal; pin 2 of Q3-N+P-MOS transistor connected in parallel to one end of resistor R27 and one end of resistor R29; pin 2 of Q5-N+P-MOS transistor connected in parallel to one end of resistor R37 and one end of resistor R38; pin 2 of Q6-N+P-MOS transistor connected in parallel to one end of resistor R41 and one end of resistor R44.

[0009] Preferably, the RF wireless remote control receiver module includes: a U5 RF receiver chip, an X1 passive crystal oscillator, an ANT antenna 1, capacitors C5, C7, C9, C10, and C11, an L1 inductor, an L2 inductor, a R22 resistor, and an R24 resistor; pin 8 of the U5 RF receiver chip is connected to one end of the X1 passive crystal oscillator; the other end of the X1 passive crystal oscillator is connected to one end of the R22 resistor and grounded; pin 7 of the U5 RF receiver chip is connected to the other end of the R22 resistor; the U5 RF receiver chip... Pin 6 of the RF receiver chip is grounded; pin 5 of the U5 RF receiver chip is connected to one end of resistor R24; the other end of resistor R24 ​​is connected in parallel to one end of capacitor C11 and the IR terminal of the RF wireless remote control receiver module; the other end of capacitor C11 is grounded; pin 2 of the U5 RF receiver chip is connected in parallel to one end of capacitor C5 and one end of inductor L2; the other end of capacitor C5 is connected in parallel to one end of inductor L1, one end of capacitor C7 and ANT antenna 1; the other ends of inductor L1, capacitor C7 and inductor L2 are grounded.

[0010] Preferably, pin 13 CH of the U6 main control MCU is connected to the other end of resistor R25; pin 14 CL of the U6 main control MCU is connected to the other end of resistor R27; pin 11 BH of the U6 main control MCU is connected to the other end of resistor R34; pin 12 BL of the U6 main control MCU is connected to the other end of resistor R37; pin 9 AH of the U6 main control MCU is connected to the other end of resistor R39; and pin 10 AL of the U6 main control MCU is connected to the other end of resistor R41.

[0011] The beneficial effects of this utility model are:

[0012] This invention proposes a circuit structure for reducing power consumption in MCU standby mode, comprising an AC-DC power supply module, a main control MCU module, a motor drive module, and an RF wireless remote control receiver module. The AC-DC power supply module is connected to the power supply terminals of the main control MCU module, the motor drive module, and the RF wireless remote control receiver module. The control terminal of the main control MCU module is connected to the controlled terminal of the motor drive module. The IR terminal of the control pin 2 of the main control MCU module is connected to the IR terminal of the RF wireless remote control receiver module. The AC-DC power supply module converts AC power into 24V low-voltage DC power. The main control MCU module processes remote control signals, drives the motor, and controls the lights. The motor drive module drives a brushless DC motor. The RF wireless remote control receiver module receives RF signals and outputs signals to the main control MCU module. This design effectively, quickly, simply, reliably, cost-effectively, and stably reduces standby power consumption. When the entire control system enters standby mode, the MCU enters a cyclic sleep wake-up program after a delay. After entering this program, the MCU will repeatedly switch between deep sleep mode and normal operation mode in a very short time. At this time, the current consumption of the MCU will vary between tens of microamps and tens of milliamps. The power displayed by the intelligent power detection device is usually the average power consumption, thereby reducing standby power consumption. During the time when the MCU is awake and working normally, it checks whether a remote control signal is received. If not, it continues to cycle through sleep and wake-up. If a remote control signal is received, it exits the cycle through sleep and wake-up mode and the MCU enters normal working mode. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a diagram of an embodiment of the AC-DC power supply module that reduces power consumption of an MCU during standby, as described in this utility model.

[0015] Figure 2This is a diagram of an embodiment of the circuit structure for reducing power consumption of the MCU during standby, as described in this utility model;

[0016] Figure 3 This is a diagram of an embodiment of a motor drive module, which is a circuit structure for reducing power consumption of an MCU during standby, as described in this utility model.

[0017] Figure 4 This is a diagram of an embodiment of the circuit structure for reducing power consumption of an RF wireless remote control receiver module in standby mode according to the present invention;

[0018] Figure 5 This is a diagram of an embodiment of the circuit structure control structure for reducing power consumption of an MCU during standby, as described in this utility model. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] like Figures 1-5 As shown, this utility model provides a circuit structure for reducing power consumption when the MCU is in standby mode, including: an AC-DC power supply module, a main control MCU module, a motor drive module, and an RF wireless remote control receiver module;

[0021] The AC-DC power supply module is connected to the power supply terminals of the main control MCU module, the motor drive module, and the RF wireless remote control receiver module, respectively. The control terminal of the main control MCU module is connected to the controlled terminal of the motor drive module. The IR terminal of the control pin 2 of the main control MCU module is connected to the IR terminal of the RF wireless remote control receiver module. The AC-DC power supply module converts AC power into 24V low-voltage DC power. The main control MCU module processes remote control signals, drives the motor, and controls the lights. The motor drive module drives the brushless DC motor. The RF wireless remote control receiver module receives RF signals and outputs signals to the main control MCU module.

[0022] The principle and effect of the above technical solution are as follows: The AC-DC power supply module is connected to the power supply terminals of the main control MCU module, the motor drive module, and the RF wireless remote control receiver module, respectively; the control terminal of the main control MCU module is connected to the controlled terminal of the motor drive module; the IR terminal of the control pin 2 of the main control MCU module is connected to the IR terminal of the RF wireless remote control receiver module; the AC-DC power supply module is used to convert AC power into 24V low-voltage DC power; the main control MCU module is used to process remote control signals, drive the motor, and control the lights; the motor drive module is used to drive the DC brushless motor; the RF wireless remote control receiver module is used to receive RF signals and output signals to the main control MCU module; it can effectively, quickly, simply, reliably, cost-effectively, and stably reduce power consumption. Low standby power consumption control method: When the entire control system enters standby mode, the MCU enters a cyclic sleep-wake program after a delay. After entering this program, the MCU will switch between deep sleep mode and normal operation mode repeatedly in a very short time. At this time, the current consumption of the MCU will vary between tens of microamps and tens of milliamps. The power displayed by the intelligent power detection device is usually the average power consumption, thereby reducing the standby power consumption. A set load current is still maintained when there is no load. The set load current includes 10mA. During the time when the MCU is awakened to normal operation, it is checked whether a remote control signal is received. If not, the cyclic sleep-wake mode continues. If a remote control signal is received, the cyclic sleep-wake mode is exited and the MCU enters the normal operation mode.

[0023] This utility model embodiment is applied to MCU chips. MCU stands for Microcontroller Unit, also known as a Single-Chip Microcomputer or a microcontroller. It is a chip-level computer that integrates a central processing unit (CPU) with appropriately reduced frequency and specifications, and peripheral interfaces such as memory, timer, USB, A / D converter, UART, PLC, DMA, and even LCD driver circuitry onto a single chip, forming a chip-level computer. It can perform different combinations of control for different applications. MCUs can be found in various applications, from mobile phones and PC peripherals and remote controls to automotive electronics, stepper motors in industry, and robotic arm control.

[0024] Depending on the application scenario and the new ecosystem requirements, for example, in battery-powered products, the power consumption of the entire control system directly affects battery life performance. The new Ecodesign Regulation released by the European Commission on April 18, 2023, specifies ecodesign requirements for power consumption in power-off mode, standby mode, and network standby for household and office electronic and electrical equipment. It stipulates that system standby power consumption will be limited to 0.5W from 2025 and 0.3W from 2027. Overall, low-power design has become paramount, even though MCUs offer multiple low-power operating modes from the outset. The AC-DC power module includes the U2 power management chip OB3399AMP and a flyback topology switching power supply.

[0025] The main control MCU module includes: a dedicated MCU chip for U6 motor drivers, LKS32MC037EM6S8C, with a built-in 5V LDO and a power supply range of 2.5~5.5V. In this embodiment, 3.3V is used to meet the operating requirements and effectively reduce power consumption. MCU solution manufacturers typically provide multiple MCU operating power modes in their designs, which can be mainly divided into normal operation mode, shutdown mode, sleep mode, and deep sleep mode, etc., according to the power consumption level from high to low. The MCU also provides multiple wake-up methods: IO wake-up, IWDG timed wake-up, external reset, IWDG reset, and debug operation.

[0026] The RF wireless remote control receiver module includes: a U5 RF receiver chip WF480RA, designed for a frequency of 433.92MHz. The RF chip outputs a signal when operational, but exhibits irregular noise in its idle state.

[0027] Considering the MCU's sleep / wake-up method and the RF chip's operating state, the RF chip's output signal cannot be used as a condition for the MCU to perform I / O wake-up. Therefore, there is no wake-up condition in this entire system.

[0028] Therefore, this embodiment proposes to set a timer for MCU to wake up from sleep mode, and check whether it has exited standby mode after waking up, so that the MCU can work intermittently, which can effectively reduce system power consumption.

[0029] Based on the measured power, the standby power consumption of the control system without sleep mode is 0.55W. After adding the MCU low power processing, the measured power consumption is 0.45W, which meets the European ERP standard of within 0.5W.

[0030] In one embodiment, the AC-DC power module includes: a DB1 rectifier bridge, a U2 power chip, an electrolytic capacitor CD1, an electrolytic capacitor CD4, an electrolytic capacitor CD2, an electrolytic capacitor CD3, a Q1 MOSFET, a D1 Schottky diode, a T2 transformer, and a CX1 capacitor; the AC1 terminal of the DB1 rectifier bridge is connected to ACL_AF, pin 4 of the T2 transformer, and one end of the CX1 capacitor; the AC2 terminal of the DB1 rectifier bridge is connected to ACN_AF, pin 2 of the T2 transformer, and the other end of the CX1 capacitor; the DC+ terminal of the DB1 rectifier bridge is connected to the positive terminals of the CD1 and CD4 electrolytic capacitors; the DC- terminal of the DB1 rectifier bridge is connected to the negative terminals of the CD1 and CD4 electrolytic capacitors; the positive terminals of the CD2 and CD3 electrolytic capacitors are connected in parallel to the +24V power supply terminal and the negative terminal of the D1 Schottky diode; the positive terminals of the CD2 and CD3 electrolytic capacitors are grounded.

[0031] The principle and effect of the above technical solution are as follows: DB1 rectifier bridge is used for rectification; U2 power chip controls the regulated output; CD1, CD4, CD2, and CD3 electrolytic capacitors constitute a voltage regulator capacitor group; U2 power chip controls the switching of Q1 MOSFET; D1 Schottky diode, T2 transformer, and CX1 capacitor constitute the output section; the AC1 terminal of DB1 rectifier bridge is connected to ACL_AF, pin 4 of T2 transformer, and one end of CX1 capacitor respectively; the AC2 terminal of DB1 rectifier bridge is connected to AC... N_AF, pin 2 of transformer T2, and the other end of capacitor CX1; the DC+ terminal of rectifier bridge DB1 is connected to the positive terminals of electrolytic capacitors CD1 and CD4 respectively; the DC- terminal of rectifier bridge DB1 is connected to the negative terminals of electrolytic capacitors CD1 and CD4 respectively; the positive terminals of electrolytic capacitors CD2 and CD3 are connected in parallel to the +24V power supply terminal and the negative terminal of Schottky diode D1; the positive terminals of electrolytic capacitors CD2 and CD3 are grounded; this method can effectively, quickly, simply, reliably, cost-effectively, and stably reduce standby power consumption.

[0032] In one embodiment, the main control MCU module includes: a U6 main control MCU, a C14 surface mount capacitor, a C15 surface mount capacitor, and a C19 surface mount capacitor; pin 1 (AVDD) of the U6 main control MCU is connected in parallel with one end of the C14 surface mount capacitor to a +5V power supply; pin 7 of the U6 main control MCU is connected to one end of the C15 surface mount capacitor; pin 8 of the U6 main control MCU is connected to one end of the C19 surface mount capacitor and a +24V power supply; the other ends of the C14, C15, and C19 surface mount capacitors are grounded.

[0033] The principle and effect of the above technical solution are as follows: The main control MCU module provides electronic power to the chip by connecting the AVDD pin 1 of the U6 main control MCU and one end of the C14 surface mount capacitor in parallel with the +5V power supply; the 7th pin of the U6 main control MCU is connected to one end of the C15 surface mount capacitor; the 8th pin of the U6 main control MCU is connected to one end of the C19 surface mount capacitor and the +24V power supply terminal for +24V drive control; the other ends of the C14 surface mount capacitor, the other ends of the C15 surface mount capacitor, and the other ends of the C19 surface mount capacitor are grounded for stable protection.

[0034] In one embodiment, the motor drive module includes: a Q3-N+P-MOS transistor, a Q5-N+P-MOS transistor, a Q6-N+P-MOS transistor, an RS5 resistor, an RS6 resistor, an RS7 resistor, an R25 resistor, an R26 resistor, an R27 resistor, an R29 resistor, an R34 resistor, an R36 resistor, an R37 resistor, an R38 resistor, an R39 resistor, an R40 resistor, an R41 resistor, and an R44 resistor; the first lead of the Q3-N+P-MOS transistor is connected in parallel to one end of the RS5 resistor, one end of the RS6 resistor, and one end of the RS7 resistor; the first lead of the Q5-N+P-MOS transistor is connected in parallel to the other end of the RS5 resistor and one end of the R38 resistor; the first lead of the Q6-N+P-MOS transistor is connected in parallel to the other end of the RS6 resistor and one end of the R44 resistor; the fourth lead of the Q3-N+P-MOS transistor is connected in parallel to one end of the R25 resistor. One end of resistor R26; the fourth pin of Q5-N+P-MOS transistor is connected in parallel to one end of resistor R34 and one end of resistor R36; the fourth pin of Q6-N+P-MOS transistor is connected in parallel to one end of resistor R39 and one end of resistor R40; the third pin of Q3-N+P-MOS transistor is connected in parallel to the other end of resistor R26 and the +24V power supply terminal; the third pin of Q5-N+P-MOS transistor is connected in parallel to the other end of resistor R36 and the +24V power supply terminal; the third pin of Q6-N+P-MOS transistor is connected in parallel to the other end of resistor R40 and the +24V power supply terminal; the second pin of Q3-N+P-MOS transistor is connected in parallel to one end of resistor R27 and one end of resistor R29; the second pin of Q5-N+P-MOS transistor is connected in parallel to one end of resistor R37 and one end of resistor R38; the second pin of Q6-N+P-MOS transistor is connected in parallel to one end of resistor R41 and one end of resistor R44.

[0035] The principle and effect of the above technical solution are as follows: The first pin of the Q3-N+P-MOS transistor is connected in parallel to one end of resistors RS5, RS6, and RS7; the first pin of the Q5-N+P-MOS transistor is connected in parallel to the other end of resistor RS5 and one end of resistor R38; the first pin of the Q6-N+P-MOS transistor is connected in parallel to the other end of resistor RS6 and one end of resistor R44; the fourth pin of the Q3-N+P-MOS transistor is connected in parallel to one end of resistor R25 and one end of resistor R26; the fourth pin of the Q5-N+P-MOS transistor is connected in parallel to one end of resistor R34 and one end of resistor R36; the fourth pin of the Q6-N+P-MOS transistor is connected in parallel to one end of resistor R39 and one end of resistor R40; the third pin of the Q3-N+P-MOS transistor is connected in parallel to the other end of resistor R26. The Q5-N+P-MOS transistor's third pin is connected in parallel to the other end of resistor R36 and the +24V power supply terminal; the Q6-N+P-MOS transistor's third pin is connected in parallel to the other end of resistor R40 and the +24V power supply terminal; the Q3-N+P-MOS transistor's second pin is connected in parallel to one end of resistor R27 and one end of resistor R29; the Q5-N+P-MOS transistor's second pin is connected in parallel to one end of resistor R37 and one end of resistor R38; the Q6-N+P-MOS transistor's second pin is connected in parallel to one end of resistor R41 and one end of resistor R44. When the entire control system enters standby mode, the MCU enters a cyclic sleep wake-up program after a delay. After entering this program, the MCU will repeatedly switch between deep sleep mode and normal operation mode in a very short time. At this time, the MCU's current consumption will vary between tens of microamps and tens of milliamps, and the power displayed by the intelligent power detection device is usually the average power consumption, significantly reducing power consumption.

[0036] In one embodiment, the RF wireless remote control receiver module includes: a U5 RF receiver chip, an X1 passive crystal oscillator, an ANT antenna 1, capacitors C5, C7, C9, C10, and C11, an L1 inductor, an L2 inductor, a R22 resistor, and an R24 resistor; pin 8 of the U5 RF receiver chip is connected to one end of the X1 passive crystal oscillator; the other end of the X1 passive crystal oscillator is connected to one end of the R22 resistor and grounded; pin 7 of the U5 RF receiver chip is connected to the other end of the R22 resistor; U Pin 6 of the U5 RF receiver chip is grounded; pin 5 of the U5 RF receiver chip is connected to one end of resistor R24; the other end of resistor R24 ​​is connected in parallel to one end of capacitor C11 and the IR terminal of the RF wireless remote control receiver module; the other end of capacitor C11 is grounded; pin 2 of the U5 RF receiver chip is connected in parallel to one end of capacitor C5 and one end of inductor L2; the other end of capacitor C5 is connected in parallel to one end of inductor L1, one end of capacitor C7 and ANT antenna 1; the other ends of inductor L1, capacitor C7 and inductor L2 are grounded.

[0037] The principle and effect of the above technical solution are as follows: U5 RF receiver chip, X1 passive crystal oscillator, ANT antenna 1, capacitors C5, C7, C9, C10, and C11, inductor L1, inductor L2, resistor R22, and resistor R24; pin 8 of the U5 RF receiver chip is connected to one end of the X1 passive crystal oscillator; the other end of the X1 passive crystal oscillator is connected to one end of resistor R22 and grounded; pin 7 of the U5 RF receiver chip is connected to the other end of resistor R22; pin 6 of the U5 RF receiver chip is grounded; U5 RF receiver... Pin 5 of the receiver chip is connected to one end of resistor R24; the other end of resistor R24 ​​is connected in parallel to one end of capacitor C11 and the IR terminal of the RF wireless remote control receiver module; the other end of capacitor C11 is grounded; pin 2 of the U5 RF receiver chip is connected in parallel to one end of capacitor C5 and one end of inductor L2; the other end of capacitor C5 is connected in parallel to one end of inductor L1, one end of capacitor C7 and ANT antenna 1; the other ends of inductor L1, capacitor C7 and inductor L2 are grounded; the U5 RF receiver chip receives RF signals and outputs signals to the main control MCU module.

[0038] In one embodiment, pin 13 CH of the U6 main control MCU is connected to the other end of resistor R25; pin 14 CL of the U6 main control MCU is connected to the other end of resistor R27; pin 11 BH of the U6 main control MCU is connected to the other end of resistor R34; pin 12 BL of the U6 main control MCU is connected to the other end of resistor R37; and pin 9 AH of the U6 main control MCU is connected to the other end of resistor R39.

[0039] The principle and effect of the above technical solution are as follows: Pin 10 AL of the U6 main control MCU is connected to the other end of resistor R41; Pins 13 CH, 14 CL, 11 BH, 12 BL, 9 AH, and 10 AL of the U6 main control MCU respectively receive RF signals transmitted by the RF wireless remote control receiver module; during the time when the MCU is awake and working normally, it checks whether a remote control signal is received. If not, it continues to cycle through sleep and wake-up. If a remote control signal is received, it exits the cycle through sleep and wake-up mode and the MCU enters normal working mode; thus achieving the effect of reducing standby power consumption.

[0040] This utility model only improves the hardware structure of the system. As for the methods and software programs involved in the operation of the system, those skilled in the art can design them themselves based on the principles and functions proposed in this utility model and in combination with existing technology. The technical solution proposed in this utility model does not improve any methods or software programs.

[0041] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A circuit structure for reducing power consumption of an MCU during standby, characterized in that, include: AC-DC power supply module, main control MCU module, motor drive module and RF wireless remote control receiver module; The AC-DC power supply module is connected to the power supply terminals of the main control MCU module, the motor drive module, and the RF wireless remote control receiver module, respectively. The control terminal of the main control MCU module is connected to the controlled terminal of the motor drive module. The IR terminal of the control pin 2 of the main control MCU module is connected to the IR terminal of the RF wireless remote control receiver module. The AC-DC power supply module converts AC power into 24V low-voltage DC power. The main control MCU module processes remote control signals, drives the motor, and controls the lights. The motor drive module drives the brushless DC motor. The RF wireless remote control receiver module receives RF signals and outputs signals to the main control MCU module.

2. The circuit structure for reducing power consumption of an MCU in standby mode according to claim 1, characterized in that, The AC-DC power module includes: a DB1 rectifier bridge, a U2 power chip, an electrolytic capacitor CD1, an electrolytic capacitor CD4, an electrolytic capacitor CD2, an electrolytic capacitor CD3, a Q1 MOSFET, a D1 Schottky diode, a T2 transformer, and a CX1 capacitor. The AC1 terminal of the DB1 rectifier bridge is connected to ACL_AF, pin 4 of the T2 transformer, and one end of the CX1 capacitor. The AC2 terminal of the DB1 rectifier bridge is connected to ACN_AF, pin 2 of the T2 transformer, and the other end of the CX1 capacitor. The DC+ terminal of the DB1 rectifier bridge is connected to the positive terminals of the CD1 and CD4 electrolytic capacitors. The DC- terminal of the DB1 rectifier bridge is connected to the negative terminals of the CD1 and CD4 electrolytic capacitors. The positive terminals of the CD2 and CD3 electrolytic capacitors are connected in parallel to the +24V power supply terminal and the negative terminal of the D1 Schottky diode. The positive terminals of the CD2 and CD3 electrolytic capacitors are grounded.

3. The circuit structure for reducing power consumption of an MCU in standby mode according to claim 1, characterized in that, The main control MCU module includes: U6 main control MCU, C14 surface mount capacitor, C15 surface mount capacitor, and C19 surface mount capacitor; pin 1 AVDD of the U6 main control MCU is connected in parallel with one end of the C14 surface mount capacitor to a +5V power supply; pin 7 of the U6 main control MCU is connected to one end of the C15 surface mount capacitor; pin 8 of the U6 main control MCU is connected to one end of the C19 surface mount capacitor and a +24V power supply; the other ends of the C14, C15, and C19 surface mount capacitors are grounded.

4. The circuit structure for reducing power consumption of an MCU in standby mode according to claim 3, characterized in that, The motor drive module includes: a Q3-N+P-MOS transistor, a Q5-N+P-MOS transistor, a Q6-N+P-MOS transistor, an RS5 resistor, an RS6 resistor, an RS7 resistor, an R25 resistor, an R26 resistor, an R27 resistor, an R29 resistor, an R34 resistor, an R36 resistor, an R37 resistor, an R38 resistor, an R39 resistor, an R40 resistor, an R41 resistor, and an R44 resistor; the first pin of the Q3-N+P-MOS transistor is connected in parallel to one end of the RS5 resistor, one end of the RS6 resistor, and one end of the RS7 resistor; the first pin of the Q5-N+P-MOS transistor is connected in parallel to the other end of the RS5 resistor and one end of the R38 resistor; the first pin of the Q6-N+P-MOS transistor is connected in parallel to the other end of the RS6 resistor and one end of the R44 resistor; the fourth pin of the Q3-N+P-MOS transistor is connected in parallel to one end of the R25 resistor and one end of the R28 resistor. Connect one end of resistor 6; connect the 4th pin of Q5-N+P-MOS transistor to one end of resistor R34 and one end of resistor R36; connect the 4th pin of Q6-N+P-MOS transistor to one end of resistor R39 and one end of resistor R40; connect the 3rd pin of Q3-N+P-MOS transistor to the other end of resistor R26 and the +24V power supply terminal; connect the 3rd pin of Q5-N+P-MOS transistor to the other end of resistor R36 and the +24V power supply terminal; connect the 3rd pin of Q6-N+P-MOS transistor to the other end of resistor R40 and the +24V power supply terminal; connect the 2nd pin of Q3-N+P-MOS transistor to one end of resistor R27 and one end of resistor R29; connect the 2nd pin of Q5-N+P-MOS transistor to one end of resistor R37 and one end of resistor R38; connect the 2nd pin of Q6-N+P-MOS transistor to one end of resistor R41 and one end of resistor R44.

5. The circuit structure for reducing power consumption of an MCU in standby mode according to claim 1, characterized in that, The RF wireless remote control receiver module includes: a U5 RF receiver chip, an X1 passive crystal oscillator, an ANT antenna 1, capacitors C5, C7, C9, C10, and C11, an L1 inductor, an L2 inductor, a R22 resistor, and an R24 resistor; pin 8 of the U5 RF receiver chip is connected to one end of the X1 passive crystal oscillator; the other end of the X1 passive crystal oscillator is connected to one end of the R22 resistor and grounded; pin 7 of the U5 RF receiver chip is connected to the other end of the R22 resistor; pin 6 of the U5 RF receiver chip is grounded; pin 5 of the U5 RF receiver chip is connected to one end of the R24 resistor; the other end of the R24 resistor is connected in parallel to one end of the C11 capacitor and the IR terminal of the RF wireless remote control receiver module; the other end of the C11 capacitor is grounded; pin 2 of the U5 RF receiver chip is connected in parallel to one end of the C5 capacitor and one end of the L2 inductor; the other end of the C5 capacitor is connected in parallel to one end of the L1 inductor, one end of the C7 capacitor, and the ANT antenna 1; the other ends of the L1 inductor, the other ends of the C7 capacitor, and the other ends of the L2 inductor are grounded.

6. The circuit structure for reducing power consumption of an MCU in standby mode according to claim 1, characterized in that, Connect pin 13 (CH) of the U6 main MCU to the other end of resistor R25; connect pin 14 (CL) of the U6 main MCU to the other end of resistor R27; connect pin 11 (BH) of the U6 main MCU to the other end of resistor R34; connect pin 12 (BL) of the U6 main MCU to the other end of resistor R37; connect pin 9 (AH) of the U6 main MCU to the other end of resistor R39; connect pin 10 (AL) of the U6 main MCU to the other end of resistor R41.

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