WO2019228052A1 - Circuit à faible consommation et dispositif électronique - Google Patents

Circuit à faible consommation et dispositif électronique Download PDF

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Publication number
WO2019228052A1
WO2019228052A1 PCT/CN2019/080522 CN2019080522W WO2019228052A1 WO 2019228052 A1 WO2019228052 A1 WO 2019228052A1 CN 2019080522 W CN2019080522 W CN 2019080522W WO 2019228052 A1 WO2019228052 A1 WO 2019228052A1
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power
terminal
unit
controlled
low
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PCT/CN2019/080522
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English (en)
Chinese (zh)
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陈柳章
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深圳市文鼎创数据科技有限公司
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Publication of WO2019228052A1 publication Critical patent/WO2019228052A1/fr

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/22—Modifications for ensuring a predetermined initial state when the supply voltage has been applied

Definitions

  • the invention relates to electronic technology, and in particular, to a low power consumption circuit and an electronic device.
  • An object of the present invention is to provide a low power consumption circuit and an electronic device, which can solve the problem of how to determine when a controllable switching element is provided between a power source and a load, and the controllable switching element is used to completely cut off the power supply to the load. Control the timing of controllable switching elements to avoid the problem of miscontrol.
  • a low power consumption circuit includes a trigger unit, a delay unit, and a first switch unit.
  • the first switch unit includes a first controlled terminal, a first power input terminal, and a first power output terminal.
  • the electric terminal is used for connecting to a power source, and the first power output terminal is used for connecting to a load;
  • An input terminal of the delay unit is connected to the trigger unit, and an output terminal is connected to the first controlled terminal;
  • the first controlled terminal is further connected to the second power input terminal, and the second power output terminal is connected to a low level;
  • the controller is configured to monitor a time period during which the triggering unit is triggered, and control the second power-in terminal and the second power-out terminal to be turned on or off through the second controlled terminal according to the triggered time.
  • the first power input terminal and the first power output terminal are conducted.
  • the voltage between the output terminal of the delay unit and the first power input terminal is greater than the first on-voltage
  • the voltage between the output terminal of the delaying unit and the first power input terminal is not greater than the first on-voltage.
  • controlling, by the second controlled terminal, the second power-in terminal and the second power-out terminal to be turned on or off according to the triggered time duration specifically including at least one of the following:
  • the second controlled terminal controls the second power-in terminal and the second power-out terminal to be turned on through the second controlled terminal;
  • the triggered duration reaches the shutdown duration, controlling the second incoming end and the second outgoing end to be disconnected through the second controlled end;
  • the second power-in terminal and the second power-out terminal are controlled to be disconnected by the second controlled terminal.
  • the trigger unit includes a button connected at one end to a low level, and the other end of the button connected to the delay unit.
  • the delay unit includes a first capacitor and a first resistor connected in parallel, one end of the first capacitor and the first resistor is connected to the trigger unit, and the other end is connected to the first controlled end;
  • the delay unit further includes a second resistor connected between the first controlled terminal and the first power input terminal.
  • first resistance and the second resistance satisfy the following relationship:
  • Vout represents a power supply voltage
  • Vth represents a first on-voltage
  • R1 and R2 represent resistance values of a first resistor R1 and a second resistor R2, respectively.
  • the trigger unit includes an antenna and a rectifier, and the rectifier is configured to convert the energy obtained by the antenna into a direct current.
  • the delay unit includes a second capacitor and a third switching unit
  • the third switching unit includes a third controlled terminal, a third power-in terminal, and a third power-out terminal, and the third power-in terminal Connected to the first controlled terminal, the third power output terminal is connected to a low level; one end of the second capacitor is connected to the trigger unit, and the other end is connected to the third controlled terminal;
  • the delay unit further includes a third resistor, and the third controlled terminal is connected to a low level through the third resistor.
  • controlling, by the second controlled terminal, the second power-in terminal and the second power-out terminal to be turned on or off according to the triggered time duration specifically including:
  • the controller After the low-power circuit or load is powered on, when the controller determines that the communication time between the antenna and other corresponding devices exceeds the preset time, it controls the second power-in terminal and the second power-out through the second controlled end. End is disconnected.
  • the second capacitor controls the third switching unit to be turned off.
  • the controller is connected to the first power output terminal, and when the first power input terminal and the first power output terminal are conducting, the controller is connected to a power source through the first power output terminal.
  • a low voltage protection unit is further included, the input terminal of the low voltage protection unit is connected to the first power output terminal, and the output terminal is connected to the second controlled terminal; the low voltage protection unit is used for detecting When the voltage of the first power output terminal is lower than a preset voltage, the second controlled terminal controls the second power input terminal and the second power output terminal to be disconnected through the second controlled terminal.
  • a low power consumption circuit includes a trigger unit, a controller, a switch unit, a first switch control unit, and a second switch control unit.
  • the switch unit is used to connect between a power source and a load.
  • the first switch control unit Connected between the controller and the switch unit, the controller is also connected to the trigger unit, and the second switch control unit is connected between the trigger unit and the switch unit; the controller is Configured as:
  • the first switch unit includes a PMOS tube
  • the second switch unit and the third switch unit include an NMOS tube.
  • An electronic device includes a power management module, and the power management module includes the low-power circuit according to any one of the above, or the low-power circuit according to any of the above
  • the embodiment of the present invention has the beneficial effect that the signal generated by the triggering unit is processed by the delay unit, thereby turning on the first switching unit when the triggering occurs in a short time, so that the power supply supplies power to the load and triggering in a long time.
  • the first switch unit is controlled to be turned off to cut off the power supply to the load; the controller further controls the second switch unit to be turned on or off according to the trigger duration to maintain or stop the first switch unit to be turned on; so that it can be accurately judged Control the timing of the power supply to the load to avoid miscontrol.
  • the relevant device is placed on a desktop, backpack, clothes pocket, etc., and the trigger unit is triggered for a long time, the power supply to the load can also be disconnected to better protect the power supply.
  • FIG. 1 is a schematic structural diagram of a low power consumption circuit according to an embodiment of the present invention
  • FIG. 2 is a schematic circuit diagram of the low-power circuit in FIG. 1;
  • FIG. 3 is another schematic circuit diagram of the low-power circuit in FIG. 1.
  • FIG. 1 shows the structure of a low-power circuit.
  • the low power consumption circuit includes a trigger unit 110, a delay unit 120, and a first switching unit Q1.
  • the first switching unit Q1 includes a first controlled terminal, a first power input terminal, and a first power output terminal.
  • the first power input terminal is used to connect to a power source, and the first power output terminal is used to connect to a load.
  • the input terminal of the delay unit 120 is connected to the trigger unit 110, and the output terminal is connected to the first controlled terminal.
  • the level of the first controlled terminal can be changed through the delay unit 120 to control the communication between the first power input terminal and the first power output terminal.
  • the power source can supply power to the load and the load can work. If the triggering unit 110 is continuously triggered, the delay unit 120 will change the level of the first controlled terminal again after the delay time reaches the preset shearing time, thereby controlling the first power input terminal and the first power output terminal to be disconnected, and the power supply When the power supply to the load is stopped, the load also stops working. In addition to the energy loss of the power supply at this time, the load will not consume power, which achieves low power consumption during shutdown.
  • the low power consumption circuit further includes a second switching unit Q2 and a controller MCU.
  • the second switching unit Q2 includes a second controlled terminal, a second power input terminal, and a second power output. end;
  • the first controlled terminal of the first switching unit Q1 is also connected to the second power-in terminal of the second switching unit Q2, and the second power-out terminal of the second switching unit Q2 is connected to a low level.
  • the controller MCU is configured to monitor the duration of the triggering unit 110, and control the second power-in terminal and the second power-out terminal to be turned on or off by the second controlled terminal according to the triggered time.
  • the controller MCU can monitor whether the triggering unit 110 is triggered. When the triggering unit 110 is just triggered, the controller MCU can control the second power-in terminal and the second power-out terminal to be conducted through the second controlled terminal, so that the first receiving terminal
  • the control terminal is connected to the low level through the second switching unit Q2, and the output terminal of the delay unit 120 is also connected to the low level; at this time, the power consumption of the trigger unit 110 and the delay unit 120 is very small.
  • the first power-in terminal and the first power-out terminal are turned on.
  • the first controlled terminal is connected to the low level through the second switching unit Q2, and the first power input terminal and the first power output terminal can be kept on.
  • the voltage between the output of the delay unit 120 and the first power input terminal is greater than the first on-voltage; thus, when the triggering unit 110 is short-term When triggered, the first power-in terminal and the first power-out terminal are turned on.
  • the triggering time of the triggering unit 110 reaches the shearing time, the voltage between the output terminal of the delay unit 120 and the first power input terminal is not greater than the first on-voltage; therefore, when the triggering unit 110 is triggered for a long time, the first The power input terminal and the first power output terminal are disconnected.
  • the trigger unit 110 includes a button S1 connected to one end at a low level, and the other end of the button S1 connected to the delay unit 120.
  • the trigger unit 110 is triggered, specifically, the button S1 is pressed.
  • the delay unit 120 includes a first capacitor C1 and a first resistor R1 connected in parallel. One end of the first capacitor C1 and the first resistor R1 is connected to the trigger unit 110, and the other end is connected to the first controlled end. That is, PMOS_EN; the delay unit 120 further includes a second resistor R2, and the second resistor R2 is connected between the first controlled terminal and the first power input terminal.
  • the button S1 When the button S1 is just pressed, because the voltage across the first capacitor C1 in the delay unit 120 cannot be abruptly changed, the level of the first controlled end is pulled down; when the button S1 is pressed for less than the shear time, The voltage between the output terminal of the delay unit 120 and the first power input terminal is greater than the first turn-on voltage, and the first power input terminal and the first power output terminal are turned on.
  • the first capacitor C1 When the button S1 has been pressed for a long time, the first capacitor C1 is charged due to the voltage across the first resistor R1. When the charging reaches a certain level, the voltage between the first controlled terminal and the first power input terminal is less than The first on-voltage, the first switching unit Q1 is turned off, and the first power-in terminal and the first power-out terminal are turned off; thus, when the time when the button S1 is pressed reaches the shear duration, the delay unit 120 outputs The voltage between the terminal and the first power input terminal is less than the first on-voltage, so that the first power input terminal and the first power output terminal are disconnected.
  • the first resistor R1 and the second resistor R2 need to satisfy the following relationship:
  • Vout represents the power supply voltage
  • Vth represents the first on-voltage
  • R1 and R2 represent the resistance values of the first resistor R1 and the second resistor R2, respectively. Therefore, it can be ensured that the first capacitor C1 is charged to a certain degree, and the voltage between the first controlled terminal and the first power input terminal can be made smaller than the first on-voltage, thereby turning off the first switching unit Q1.
  • the pin GPIO2 of the controller MCU is defined as the pin SW_POWER triggered by the detection trigger unit 110, and this pin is connected to the trigger unit 110 through a diode D1, so that when the first controlled end is switched by the second switch unit When Q2 is pulled to a low level, it will not affect the judgment of the controller MCU on the action of the button S1.
  • the pin GPIO1 of the controller MCU is defined as a pin POWER_LOCK that controls the second power-in terminal and the second power-out terminal to be turned on or off through the second controlled end.
  • the second controlled terminal is used to control the second power-in terminal and the second power-out terminal to be turned on or off according to the triggered duration, as follows.
  • the controller MCU detects that the triggering unit 110 is triggered for less than a preset power-on duration, such as 1.5 seconds after it is not triggered, the second power-in terminal and the second power-in terminal are not controlled by the second controlled terminal.
  • the second power output terminal is turned on. If the delay unit 120 is delayed to the switching time, the first power input terminal and the first power output terminal are disconnected, and the power supply stops supplying power to the load. As a result, when the triggering time of the triggering unit 110 is shorter than the power-on duration, the load will not start normally.
  • the controller MCU when the controller MCU detects that the triggering time of the triggering unit 110 reaches a preset power-on duration, it controls the second power-in terminal and the second power-out terminal to be conducted through the second controlled terminal;
  • the time unit 120 delays to the shearing time without disconnecting the first power input terminal and the first power output terminal, thereby maintaining the power supply to the load and realizing normal startup.
  • the controller MCU detects that the trigger unit 110 is re-triggered, and the triggered time reaches a preset shutdown time, such as 1.5 seconds, it passes the second The controlled end controls the second power-in terminal and the second power-out terminal to be disconnected. If the delay of the delay unit 120 reaches the shear time, the output of the delay unit 120, that is, the first controlled end and the first The voltage between the power-in terminals can make the first power-in terminal and the first power-out terminal disconnect, the power supply stops supplying power to the load, and achieves the effect of triggering a shutdown for a long time.
  • a preset shutdown time such as 1.5 seconds
  • the level of the first controlled terminal can be changed through the delay unit 120, so that the first power input terminal and the first power output terminal are connected, and the power source can supply power to the load.
  • the load can work; when the trigger unit 110 is continuously triggered, the delay unit 120 will change the level of the first controlled terminal again after the delay reaches the preset shear time, thereby controlling the first power input terminal and the first power output terminal. Disconnected; and when the controller MCU detects that the triggering time of the triggering unit 110 reaches the preset power-on duration, it will control the second power-in terminal and the second power-out terminal to conduct through the second controlled end to maintain the power supply to the load powered by.
  • the controller MCU detects that the triggering time of the triggering unit 110 reaches a preset false touch time, such as 5 seconds
  • the second power-in terminal and the second power-out terminal are controlled by the second controlled terminal.
  • the electrical terminal is disconnected, because at this time the delay unit 120 has been delayed for more than the shear time, the voltage at the output terminal of the delay unit 120, that is, the voltage between the first controlled terminal and the first power input terminal can make the When the power input terminal and the first power output terminal are disconnected, the power supply stops supplying power to the load.
  • the relevant device carrying the low-power consumption circuit provided by the embodiment of the present invention is placed on a desktop, a backpack, a clothes pocket, etc., and the trigger unit 110 is triggered for a long time, the power supply will not normally supply power to the load.
  • the device is not turned on by mistake, thereby avoiding power consumption when the trigger unit 110 is triggered by mistake.
  • the controller MCU is connected to the first power output terminal, and when the first power input terminal and the first power output terminal are turned on, the controller MCU is connected to the power source through the first power output terminal, and obtains power from the power source to perform jobs. Therefore, when the first switching unit Q1 is not turned on, the controller MCU does not consume power, which further reduces power consumption.
  • the trigger unit 110 includes an antenna ANT and a rectifier DZL.
  • the rectifier DZL is configured to convert the energy obtained by the antenna ANT into a direct current.
  • the trigger unit 110 further includes a filter capacitor C3.
  • the delay unit 120 includes a second capacitor C2 and a third switching unit Q3.
  • the third switching unit Q3 includes a third controlled terminal, a third incoming terminal, and a third outgoing terminal.
  • the third incoming terminal is connected to the first controlled terminal, and the third outgoing terminal is connected to Low level; one end of the second capacitor C2 is connected to the trigger unit 110, and the other end is connected to the third controlled end.
  • the delay unit 120 further includes a third resistor R3, and the third controlled terminal is connected to a low level through the third resistor R3.
  • the delay unit 120 also includes a second resistor R2, and the second resistor R2 is connected between the first controlled terminal and the first power input terminal.
  • the triggering unit 110 is specifically triggered when the antenna ANT is coupled with other wireless transmitting devices to obtain wireless energy.
  • the trigger unit 110 provides a voltage to the delay unit 120.
  • the voltage controls the third controlled terminal through the second capacitor C2 to make the third switching unit Q3 conductive, so that the first controlled terminal passes the first
  • the three switching units Q3 are connected to a low level, so that the first switching unit Q1 is turned on, and the first power-in terminal and the first power-out terminal are turned on.
  • the pin GPIO3 of the controller MCU is defined as the pin NFC_DET triggered by the detection trigger unit 110, and the pin is connected to the trigger unit 110 through a resistor R4.
  • the second capacitor C2 has been charged with enough power from the antenna ANT to control the third controlled end such that the third switching unit Q3 is turned off, so that the first receiving
  • the voltage at the control terminal is equal to the voltage of the power supply.
  • the voltage between the first controlled terminal and the first power input terminal is less than the first on-voltage, the first power input terminal and the first power output terminal are disconnected, and the power supply stops supplying power to the load.
  • the load also stopped working. In addition to the energy loss of the power supply at this time, the load will not consume power, which achieves low power consumption during shutdown.
  • the pin GPIO1 of the controller MCU is defined as a pin POWER_LOCK that controls the second power-in terminal and the second power-out terminal to be turned on or off through the second controlled end.
  • the second controlled terminal is used to control the second power-in terminal and the second power-out terminal to be turned on or off according to the triggered duration, and further includes the following modes.
  • the controller MCU After the low-power circuit or load is powered on, when the controller MCU judges that there is no communication between the antenna ANT and other corresponding devices for a long time, it controls the second power-in terminal and the second power-out terminal to be disconnected through the second controlled end. Because the second capacitor C2 is already full at this time, the voltage between the first controlled terminal and the first power input terminal is less than the first on-voltage, the first power input terminal and the first power output terminal are disconnected, and the power supply is stopped. When power is supplied to the load, the load also stops working.
  • the low power consumption circuit provided by the embodiment of the present invention can be designed as a separate power management module or integrated into electronic devices such as mp3, Bluetooth headset, mobile power, etc., that is:
  • An electronic device includes a power management module.
  • the power management module includes the aforementioned low power consumption circuit.
  • the controller MCU in the low-power circuit may use an independent chip, or may be a main control chip in an electronic device, such as a Bluetooth chip in a Bluetooth headset.
  • the low power consumption circuit further includes a low voltage protection unit (not shown in the figure); in this embodiment, the low voltage protection unit includes a voltage detection chip U2, The chip model can use XC6126 series.
  • the input terminal of the low voltage protection unit is connected to the first power output terminal, and the output terminal is connected to the second controlled terminal; the low voltage protection unit is used to detect the voltage of the first power output terminal, and the voltage at the first power output terminal is lower than a preset value.
  • the second controlled terminal controls the second power input terminal and the second power output terminal to be disconnected, thereby preventing the power supply from being excessively discharged. Even if the controller MCU outputs a high level to the second controlled end, the second switching unit Q2 cannot be turned on, so the first switching unit Q1 cannot be maintained on and the battery will not output.
  • the embodiment of the present invention also provides another implementation manner of the low power consumption circuit.
  • the low power consumption circuit includes a trigger unit, a controller, a switch unit, a first switch control unit and a second switch control unit.
  • the switch unit is used to connect between the power source and the load.
  • the first switch control unit is connected to the controller and the switch.
  • the controller is also connected to the trigger unit, and the second switch control unit is connected between the trigger unit and the switch unit; the controller is configured to:
  • the first switch control unit When it is detected that the triggering time of the trigger unit reaches the shutdown time, the first switch control unit is controlled to be in the second state, so that the second switch control unit controls the switch unit to be turned off.
  • the switching unit may be the first switching unit Q1 of the foregoing embodiment
  • the first switching control unit may be the second switching unit Q2 of the foregoing embodiment
  • the second switching control unit may be the time delay of the foregoing embodiment. Unit 120.
  • the low-power circuit and the electronic device provided by the embodiment of the present invention process the signal generated by the triggering unit through the delay unit, thereby turning on the first switching unit when the triggering occurs in a short time, so that the power supply supplies power to the load, and when the triggering occurs in a long time
  • the controller controls the second switch unit to be turned on or off according to the triggering time to maintain or stop the first switch unit to be turned on; so that the control can be accurately judged Timing of power supply to the load to avoid miscontrol.
  • the first switching unit Q1, the second switching unit Q2, and the third switching unit Q3 may be integrated circuits, independent components, or multiple elements including corresponding controlled terminals, power-in terminals, power-out terminals, and corresponding conduction logic. Device matching circuit.
  • the first switching unit Q1 includes a PMOS tube
  • the second switching unit Q2 and the third switching unit Q3 each include an NMOS tube.

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Abstract

La présente invention concerne un circuit à faible consommation et un dispositif électronique. Le circuit à faible consommation comprend une unité de déclenchement (110), une unité de retard (120) et une première unité de commutation (Q1). La première unité de commutation (Q1) comprend une première borne commandée, une première borne d'entrée de puissance et une première borne de sortie de puissance. La première borne d'entrée de puissance est conçue pour être connectée à une alimentation, et la première borne de sortie de puissance est conçue pour être connectée à une charge. Une borne d'entrée de l'unité de retard (120) est connectée à l'unité de déclenchement (110), et une borne de sortie de l'unité de retard (120) est connectée à la première borne commandée. Le circuit comprend en outre une seconde unité de commutation (Q2) et un dispositif de commande (MCU), la seconde unité de commutation (Q2) comprenant une seconde borne commandée, une seconde borne d'entrée d'énergie et une seconde borne de sortie d'énergie. La première borne commandée est en outre connectée à la seconde borne d'entrée de puissance, et la seconde borne de sortie de puissance est connectée à un niveau bas. Le dispositif de commande (MCU) est conçu pour surveiller la durée de l'unité de déclenchement (110) qui est déclenchée, et pour commander, au moyen de la seconde borne commandée, la seconde borne d'entrée de puissance et la seconde borne de sortie de puissance devant être allumées ou éteintes en fonction de la durée déclenchée. Au moyen de l'invention, la synchronisation pour commander une alimentation pour alimenter une charge peut être déterminée avec précision, de façon à éviter un fonctionnement de commande erroné.
PCT/CN2019/080522 2018-05-31 2019-03-29 Circuit à faible consommation et dispositif électronique WO2019228052A1 (fr)

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CN108540115A (zh) * 2018-05-31 2018-09-14 深圳市文鼎创数据科技有限公司 一种低功耗电路和电子装置
CN110497821A (zh) * 2019-08-20 2019-11-26 江西恒动新能源有限公司 一种充电唤醒系统及其控制方法
WO2021223139A1 (fr) * 2020-05-07 2021-11-11 深圳市大疆创新科技有限公司 Dispositif de commande de mise sous tension/hors tension et équipement électronique
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