Multi-key awakening low-power-consumption circuit

Abstract

The utility model discloses a low-power-consumption circuit for multi-key wakeup. The low-power-consumption circuit comprises a key switch circuit, a DC / DC switch conversion circuit and a conduction control circuit, the switch circuit comprises a switch SW1 OFF, a switch SW2 ON, a switch SW3 Scene2, a switch SW4 Scene1, a switch SW5 Scene3, a switch SW6 Scene4, a switch SW7 Scene5, a switch SW8 Scene6 and a switch SW9 Scene7; the DC / DC switch conversion circuit comprises a chip U4; the conduction control circuit comprises a triode Q1. The utility model relates to the technical field of low-power-consumption circuits, in particular to a low-power-consumption circuit awakened by multiple keys. The technical problem to be solved by the utility model is to provide a multi-key awakening low-power-consumption circuit which is beneficial to realizing the awakening of the low-power-consumption circuit.

Description

Technical Field

[0001] The utility model relates to the technical field of low-power circuits, in particular to a multi-key wake-up low-power circuit. Background Art

[0002] Low power consumption is an important design consideration, especially in battery-powered devices. Low power consumption design involves multiple aspects, including hardware design, software optimization, and system configuration. By selecting low-power chips, optimizing power and clock design, using peripherals reasonably, and optimizing software, low-power operation of the system can be achieved and battery life can be improved.

[0003] Currently, all electronic consumer products on the market have low power consumption, especially those that need to be charged or use batteries, which have more stringent requirements for low power consumption. If the low power consumption is not done well, the consumer experience will be very poor.

[0004] However, many low-power circuit designs are too simple to meet actual needs. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a multi-key wake-up low-power circuit, which is conducive to realizing the wake-up of the low-power circuit.

[0006] The utility model adopts the following technical solutions to achieve the purpose of the utility model:

[0007] A multi-key wake-up low-power circuit, characterized in that it includes: a key switch circuit, a DC / DC switch conversion circuit and a conduction control circuit; the switch circuit includes switches SW1_OFF, SW2_ON, SW3_Scene2, SW4_Scene1, SW5_Scene3, SW6_Scene4, SW7_Scene5, SW8_Scene6 and SW9_Scene7, the SW1_OFF is electrically connected to one end of the diodes D1 and D11, the SW2_ON is electrically connected to one end of the diodes D2 and D12, the SW3_Scene2 is electrically connected to one end of the diodes D3 and D13, the SW4_Scene1 is electrically connected to one end of the diodes D3 and D13, and the The SW5_Scene3 is electrically connected to one end of the diodes D4 and D14, the SW5_Scene3 is electrically connected to one end of the diodes D5 and D15, the SW6_Scene4 is electrically connected to one end of the diodes D6 and D16, the SW7_Scene5 is electrically connected to one end of the diodes D7 and D17, the SW8_Scene6 is electrically connected to one end of the diodes D8 and D18, and the SW9_Scene7 is electrically connected to one end of the diodes D1 and D11; the DC / DC switching conversion circuit includes a chip U4, a pin 1 of the chip U4 is electrically connected to one end of the inductor L1, a pin 6 of the chip U4 is electrically connected to the other end of the inductor L1, a capacitor C1, a capacitor C2, one end of the capacitor C3 and a + 3V power supply, pin 3 of the chip U4 is electrically connected to one end of the resistor R26, pin 5 of the chip U4 is electrically connected to one end of the resistor R10, capacitor C4, capacitor C5, and capacitor C8, the other ends of the resistor R26, the resistor R10, and the capacitor C4 are electrically connected to one end of the resistor R11, and the other ends of the capacitor C5, the capacitor C8, and the resistor R11 are grounded respectively; the conduction control circuit includes a transistor Q1, pin 1 of the transistor Q1 is electrically connected to one end of the resistor R14 and the resistor R22, the other end of the resistor R14 is electrically connected to pin 5 of the chip U4, and the other end of the resistor R22 is electrically connected to the diode D11, the diode D12, and the diode D13. The transistor D13, the diode D14, the diode D15, the diode D16, the diode D17, the diode D18 and the other end of the diode D19, the pin 2 of the transistor Q1 is electrically connected to the pin 5 of the chip U4, the pin 3 of the transistor Q1 is electrically connected to the resistor R13 and one end of the diode D10, the other end of the resistor R13 is grounded, the pin 4 of the chip U4 is electrically connected to one end of the resistor R25, the other end of the resistor R25 is electrically connected to the capacitor C6, the resistor R16 and one end of the diode D20, the other end of the resistor R25 is electrically connected to the other end of the diode D10, and the other ends of the resistor R16 and the capacitor C6 are grounded respectively.

[0008] As a further limitation of the present technical solution, the other end of the diode D1 is electrically connected to one end of the resistor R1, and the other end of the resistor R1 is electrically connected to the pin 5 of the chip U4, the other end of the diode D2 is electrically connected to one end of the resistor R2, and the other end of the resistor R2 is electrically connected to the pin 5 of the chip U4, the other end of the diode D3 is electrically connected to one end of the resistor R3, and the other end of the resistor R3 is electrically connected to the pin 5 of the chip U4, the other end of the diode D4 is electrically connected to one end of the resistor R4, and the other end of the resistor R4 is electrically connected to the pin 5 of the chip U4, and the other end of the diode D5 is electrically connected to the resistor One end of the resistor R5, the other end of the resistor R5 is electrically connected to pin 5 of the chip U4, the other end of the diode D6 is electrically connected to one end of the resistor R6, the other end of the resistor R6 is electrically connected to pin 5 of the chip U4, the other end of the diode D7 is electrically connected to one end of the resistor R7, the other end of the resistor R7 is electrically connected to pin 5 of the chip U4, the other end of the diode D8 is electrically connected to one end of the resistor R8, the other end of the resistor R8 is electrically connected to pin 5 of the chip U4, the other end of the diode D9 is electrically connected to one end of the resistor R9, the other end of the resistor R9 is electrically connected to pin 5 of the chip U4.

[0009] As a further limitation of the technical solution, it also includes a PWM signal control circuit, which includes a chip U1, pin 3 of the chip U1 is electrically connected to the other end of the diode D9, pin 1 of the chip U1 is electrically connected to pin 5 of the chip U4, pin 2 of the chip U1 is electrically connected to one end of resistor R17, pin 7 of the chip U1 is electrically connected to one end of resistor R18, pin 8 of the chip U1 is electrically connected to one end of resistor R19, the resistor R17, the resistor R18 and the other end of the resistor R19 are respectively electrically connected to pin 5 of the chip U4, pin 4 of the chip U1 is electrically connected to one end of resistor R32 and resistor R33, the other end of the resistor R33 is grounded, the other end of the resistor R32 is electrically connected to capacitor C9 and pin 5 of the chip U4, and the other end of the capacitor C9 is grounded.

[0010] As a further limitation of the present technical solution, it also includes an eight-bit parallel-to-serial shift register circuit, which includes a chip U2, wherein pin 1 of the chip U2 is electrically connected to pin 5 of the chip U1, pin 2 of the chip U2 is electrically connected to pin 10 of the chip U1, pin 3 of the chip U2 is electrically connected to the other end of the diode D6, pin 4 of the chip U2 is electrically connected to the other end of the diode D6, pin 5 of the chip U2 is electrically connected to the other end of the diode D7, pin 6 of the chip U2 is electrically connected to the other end of the diode D8, pin 9 of the chip U2 is electrically connected to pin 14 of the chip U1, and pin 15 of the chip U2 is electrically connected to pin 20 of the chip U1. Pin 10 is electrically connected to the other end of the diode D3, pin 11 of the chip U2 is electrically connected to the other end of the diode D1, pin 12 of the chip U2 is electrically connected to the other end of the diode D2, pin 14 of the chip U2 is electrically connected to the other end of the diode D4, pin 13 of the chip U2 is electrically connected to one end of the resistor R21, pin 15 of the chip U2 is electrically connected to one end of the resistor R20, pin 16 of the chip U2 is electrically connected to one end of the capacitor C7 and the capacitor C10, the other ends of the resistor R20, the resistor R21, the capacitor C7 and the capacitor C10 are grounded respectively, and pin 16 of the chip U2 is electrically connected to pin 5 of the chip U4.

[0011] As a further limitation of the present technical solution, pin 6 of the chip U4 is electrically connected to pin 1 of the battery Battery.

[0012] Compared with the related art, the low-power consumption circuit for multi-key wake-up provided by the utility model has the following beneficial effects:

[0013] (1) This circuit uses multiple buttons to facilitate the control of low-power circuits and wake up low-power circuits, which is practical and convenient.

[0014] (2) This circuit uses chip U2 to expand the input end. By connecting to chip U1 through three serial data pins, 8-bit input data or switch values ​​can be read serially.

[0015] (3) When using the same battery, the power consumption of this circuit can be reduced to 10μA in sleep mode, while the power consumption of this circuit is about 20μA when not using this circuit. That is to say, under the same conditions, the service life of the battery can be doubled by using this circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a key switch circuit 1 of the utility model.

[0017] Figure 2 This is the second key switch circuit of the utility model.

[0018] Figure 3 This is the third key switch circuit of the utility model.

[0019] Figure 4 The utility model discloses a DC / DC switch conversion circuit and a conduction control circuit.

[0020] Figure 5 The utility model discloses an eight-bit parallel-to-serial shift register circuit.

[0021] Figure 6 This is a PWM signal control circuit of the utility model. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] A multi-button wake-up low-power circuit, comprising: a button switch circuit, a DC / DC switch conversion circuit and a conduction control circuit; the switch circuit comprises switches SW1_OFF, SW2_ON, SW3_Scene2, SW4_Scene1, SW5_Scene3, SW6_Scene4, SW7_Scene5, SW8_Scene6 and SW9_Scene7, the SW1_OFF is electrically connected to one end of diodes D1 and D11, the SW2_ON is electrically connected to one end of diodes D2 and D12, the SW3_Scene2 is electrically connected to one end of diodes D3 and D13, the SW4_Scene1 is electrically connected to the diodes The SW5_Scene3 is electrically connected to one end of the diodes D4 and D14, the SW5_Scene3 is electrically connected to one end of the diodes D5 and D15, the SW6_Scene4 is electrically connected to one end of the diodes D6 and D16, the SW7_Scene5 is electrically connected to one end of the diodes D7 and D17, the SW8_Scene6 is electrically connected to one end of the diodes D8 and D18, and the SW9_Scene7 is electrically connected to one end of the diodes D1 and D11; the DC / DC switch conversion circuit includes a chip U4, a pin 1 of the chip U4 is electrically connected to one end of the inductor L1, and a pin 6 of the chip U4 is electrically connected to the other end of the inductor L1, a capacitor C1, a capacitor C2, one end of the capacitor C3 and a +3V The power supply is provided, the pin 3 of the chip U4 is electrically connected to one end of the resistor R26, the pin 5 of the chip U4 is electrically connected to one end of the resistor R10, the capacitor C4, the capacitor C5, and the capacitor C8, the other ends of the resistor R26, the resistor R10, and the capacitor C4 are electrically connected to one end of the resistor R11, and the other ends of the capacitor C5, the capacitor C8, and the resistor R11 are grounded respectively; the conduction control circuit includes a transistor Q1, the pin 1 of the transistor Q1 is electrically connected to one end of the resistor R14 and the resistor R22, the other end of the resistor R14 is electrically connected to the pin 5 of the chip U4, and the other end of the resistor R22 is electrically connected to the diode D11, the diode D12, the diode D13, the diode D14, the diode D15, the diode D16, the diode D17, the diode D18, the diode D19, the diode D20, the diode D210, the diode D221, the diode D23, the diode D24, the diode D25, the diode D26, the resistor R10, and the capacitor C4 are electrically connected to one end of the resistor R11, The transistor D13, the diode D14, the diode D15, the diode D16, the diode D17, the diode D18 and the other end of the diode D19, the pin 2 of the transistor Q1 is electrically connected to the pin 5 of the chip U4, the pin 3 of the transistor Q1 is electrically connected to the resistor R13 and one end of the diode D10, the other end of the resistor R13 is grounded, the pin 4 of the chip U4 is electrically connected to one end of the resistor R25, the other end of the resistor R25 is electrically connected to the capacitor C6, the resistor R16 and one end of the diode D20, the other end of the resistor R25 is electrically connected to the other end of the diode D10, and the other ends of the resistor R16 and the capacitor C6 are grounded respectively.

[0024] The other end of the diode D1 is electrically connected to one end of the resistor R1, and the other end of the resistor R1 is electrically connected to the pin 5 of the chip U4. The other end of the diode D2 is electrically connected to one end of the resistor R2, and the other end of the resistor R2 is electrically connected to the pin 5 of the chip U4. The other end of the diode D3 is electrically connected to one end of the resistor R3, and the other end of the resistor R3 is electrically connected to the pin 5 of the chip U4. The other end of the diode D4 is electrically connected to one end of the resistor R4, and the other end of the resistor R4 is electrically connected to the pin 5 of the chip U4. The other end of the diode D5 is electrically connected to one end of the resistor R5. The other end of the resistor R5 is electrically connected to pin 5 of the chip U4, the other end of the diode D6 is electrically connected to one end of the resistor R6, and the other end of the resistor R6 is electrically connected to pin 5 of the chip U4, the other end of the diode D7 is electrically connected to one end of the resistor R7, and the other end of the resistor R7 is electrically connected to pin 5 of the chip U4, the other end of the diode D8 is electrically connected to one end of the resistor R8, and the other end of the resistor R8 is electrically connected to pin 5 of the chip U4, the other end of the diode D9 is electrically connected to one end of the resistor R9, and the other end of the resistor R9 is electrically connected to pin 5 of the chip U4.

[0025] It also includes a PWM signal control circuit, which includes a chip U1, wherein pin 3 of the chip U1 is electrically connected to the other end of the diode D9, pin 1 of the chip U1 is electrically connected to pin 5 of the chip U4, pin 2 of the chip U1 is electrically connected to one end of resistor R17, pin 7 of the chip U1 is electrically connected to one end of resistor R18, pin 8 of the chip U1 is electrically connected to one end of resistor R19, the resistor R17, the resistor R18 and the other end of the resistor R19 are respectively electrically connected to pin 5 of the chip U4, pin 4 of the chip U1 is electrically connected to one end of resistor R32 and resistor R33, the other end of the resistor R33 is grounded, the other end of the resistor R32 is electrically connected to capacitor C9 and pin 5 of the chip U4, and the other end of the capacitor C9 is grounded.

[0026] The eight-bit parallel-to-serial shift register circuit includes a chip U2, wherein the pin 1 of the chip U2 is electrically connected to the pin 5 of the chip U1, the pin 2 of the chip U2 is electrically connected to the pin 10 of the chip U1, the pin 3 of the chip U2 is electrically connected to the other end of the diode D6, the pin 4 of the chip U2 is electrically connected to the other end of the diode D6, the pin 5 of the chip U2 is electrically connected to the other end of the diode D7, the pin 6 of the chip U2 is electrically connected to the other end of the diode D8, the pin 9 of the chip U2 is electrically connected to the pin 14 of the chip U1, and the pin 10 of the chip U2 is electrically connected to the other end of the diode D7. The other end of the diode D3 is electrically connected to the pin 11 of the chip U2, the other end of the diode D1 is electrically connected to the pin 12 of the chip U2, the other end of the diode D2 is electrically connected to the pin 14 of the chip U2, the other end of the diode D4 is electrically connected to the pin 13 of the chip U2, the one end of the resistor R21 is electrically connected to the pin 15 of the chip U2, the one end of the resistor R20 is electrically connected to the pin 16 of the chip U2, the other ends of the resistor R20, the resistor R21, the capacitor C7 and the capacitor C10 are grounded respectively, and the pin 16 of the chip U2 is electrically connected to the pin 5 of the chip U4.

[0027] Pin 6 of the chip U4 is electrically connected to pin 1 of the battery.

[0028] The model of the chip U1 is ESP-WROOM-02D module.

[0029] The model of the chip U2 is MC74HC165ADR2G.

[0030] The model of the chip U4 is SY7072A.

[0031] The model of the transistor Q1 is MMBT3906.

[0032] The working principle of the low-power consumption circuit for multi-key wake-up provided by the utility model is as follows:

[0033] When chip U1 is in sleep mode, press Figure 1 Any button inside can wake up chip U1, for example, by pressing switch SW2_ON, the preset power-on is low level valid, so transistor Q1 is turned on, and then chip U4 switch conversion circuit outputs 3.3V voltage to power pin 12 of chip U2. Since the serial port of chip U1 is not enough, it is expanded through chip U2. It has 8 input terminals, and 3 serial data pins are connected to chip U1, so 8-bit input data or switch quantity can be read serially, so chip U1 starts working at this time.

[0034] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A low-power circuit for multi-button wake-up, characterized in that it includes: Key switch circuit, DC / DC switch conversion circuit and conduction control circuit; The switch circuit includes switches SW1_OFF, SW2_ON, SW3_Scene2, SW4_Scene1, SW5_Scene3, SW6_Scene4, SW7_Scene5, SW8_Scene6 and SW9_Scene7, wherein SW1_OFF is electrically connected to one end of the diodes D1 and D11, SW2_ON is electrically connected to one end of the diodes D2 and D12, SW3_Scene2 is electrically connected to one end of the diodes D3 and D13, SW4_Scene1 is electrically connected to one end of the diodes D4 and D14, SW5_Scene3 is electrically connected to one end of the diodes D5 and D15, SW6_Scene4 is electrically connected to one end of the diodes D6 and D16, SW7_Scene5 is electrically connected to one end of the diodes D7 and D17, SW8_Scene6 is electrically connected to one end of the diodes D8 and D18, and SW9_Scene7 is electrically connected to one end of the diodes D1 and D11; The DC / DC switch conversion circuit includes a chip U4, wherein a pin 1 of the chip U4 is electrically connected to one end of an inductor L1, a pin 6 of the chip U4 is electrically connected to the other end of the inductor L1, one end of a capacitor C1, a capacitor C2, a capacitor C3 and a +3V power supply, a pin 3 of the chip U4 is electrically connected to one end of a resistor R26, a pin 5 of the chip U4 is electrically connected to one end of a resistor R10, a capacitor C4, a capacitor C5 and a capacitor C8, the other ends of the resistor R26, the resistor R10 and the capacitor C4 are electrically connected to one end of a resistor R11 respectively, and the other ends of the capacitor C5, the capacitor C8 and the resistor R11 are grounded respectively; The conduction control circuit includes a transistor Q1, wherein the pin 1 of the transistor Q1 is electrically connected to one end of the resistor R14 and the resistor R22, the other end of the resistor R14 is electrically connected to the pin 5 of the chip U4, the other end of the resistor R22 is electrically connected to the other ends of the diodes D11, D12, D13, D14, D15, D16, D17, D18 and D19, and the transistor Pin 2 of transistor Q1 is electrically connected to pin 5 of the chip U4, pin 3 of the transistor Q1 is electrically connected to one end of resistor R13 and diode D10, the other end of the resistor R13 is grounded, pin 4 of the chip U4 is electrically connected to one end of resistor R25, the other end of the resistor R25 is electrically connected to capacitor C6, resistor R16 and one end of diode D20, the other end of the resistor R25 is electrically connected to the other end of the diode D10, and the other ends of the resistor R16 and the capacitor C6 are grounded respectively.

2. The low-power consumption circuit for multi-key wake-up according to claim 1 is characterized in that: The other end of the diode D1 is electrically connected to one end of the resistor R1, and the other end of the resistor R1 is electrically connected to the pin 5 of the chip U4. The other end of the diode D2 is electrically connected to one end of the resistor R2, and the other end of the resistor R2 is electrically connected to the pin 5 of the chip U4. The other end of the diode D3 is electrically connected to one end of the resistor R3, and the other end of the resistor R3 is electrically connected to the pin 5 of the chip U4. The other end of the diode D4 is electrically connected to one end of the resistor R4, and the other end of the resistor R4 is electrically connected to the pin 5 of the chip U4. The other end of the diode D5 is electrically connected to one end of the resistor R5. The other end of the resistor R5 is electrically connected to pin 5 of the chip U4, the other end of the diode D6 is electrically connected to one end of the resistor R6, and the other end of the resistor R6 is electrically connected to pin 5 of the chip U4, the other end of the diode D7 is electrically connected to one end of the resistor R7, and the other end of the resistor R7 is electrically connected to pin 5 of the chip U4, the other end of the diode D8 is electrically connected to one end of the resistor R8, and the other end of the resistor R8 is electrically connected to pin 5 of the chip U4, the other end of the diode D9 is electrically connected to one end of the resistor R9, and the other end of the resistor R9 is electrically connected to pin 5 of the chip U4.

3. The low-power consumption circuit for multi-key wake-up according to claim 2, characterized in that: It also includes a PWM signal control circuit, which includes a chip U1, wherein pin 3 of the chip U1 is electrically connected to the other end of the diode D9, pin 1 of the chip U1 is electrically connected to pin 5 of the chip U4, pin 2 of the chip U1 is electrically connected to one end of resistor R17, pin 7 of the chip U1 is electrically connected to one end of resistor R18, pin 8 of the chip U1 is electrically connected to one end of resistor R19, the resistor R17, the resistor R18 and the other end of the resistor R19 are respectively electrically connected to pin 5 of the chip U4, pin 4 of the chip U1 is electrically connected to one end of resistor R32 and resistor R33, the other end of the resistor R33 is grounded, the other end of the resistor R32 is electrically connected to capacitor C9 and pin 5 of the chip U4, and the other end of the capacitor C9 is grounded.

4. The low-power consumption circuit for multi-key wake-up according to claim 3 is characterized in that: The eight-bit parallel-to-serial shift register circuit includes a chip U2, wherein the pin 1 of the chip U2 is electrically connected to the pin 5 of the chip U1, the pin 2 of the chip U2 is electrically connected to the pin 10 of the chip U1, the pin 3 of the chip U2 is electrically connected to the other end of the diode D6, the pin 4 of the chip U2 is electrically connected to the other end of the diode D6, the pin 5 of the chip U2 is electrically connected to the other end of the diode D7, the pin 6 of the chip U2 is electrically connected to the other end of the diode D8, the pin 9 of the chip U2 is electrically connected to the pin 14 of the chip U1, and the pin 10 of the chip U2 is electrically connected to the other end of the diode D7. The other end of the diode D3 is electrically connected to the pin 11 of the chip U2, the other end of the diode D1 is electrically connected to the pin 12 of the chip U2, the other end of the diode D2 is electrically connected to the pin 14 of the chip U2, the other end of the diode D4 is electrically connected to the pin 13 of the chip U2, the one end of the resistor R21 is electrically connected to the pin 15 of the chip U2, the one end of the resistor R20 is electrically connected to the pin 16 of the chip U2, the other ends of the resistor R20, the resistor R21, the capacitor C7 and the capacitor C10 are grounded respectively, and the pin 16 of the chip U2 is electrically connected to the pin 5 of the chip U4.

5. The multi-key wake-up low-power circuit according to claim 1 is characterized in that: Pin 6 of the chip U4 is electrically connected to pin 1 of the battery.

Images