Charging intelligent wake-up circuit

Abstract

The utility model provides a charging intelligent wake-up circuit. A working power supply is introduced to a power supply end of an MCU of intelligent equipment; comprising an electronic switch arranged between a working power supply and a power supply end of an MCU, the electronic switch is controlled by an electronic switch control circuit, and the electronic switch control circuit comprises a charging detection circuit used for detecting whether a charging power supply is inserted into a battery charging interface of the intelligent equipment, and an electronic switch driving circuit used for driving the electronic switch to be closed. When the battery charging interface of the intelligent equipment is connected to a charging power supply, the electronic switch driving circuit drives the electronic switch to be closed, and the working power supply is connected to the power supply end of the MCU. By adopting the circuit provided by the utility model, the working power supply is connected to the power supply end of the MCU of the intelligent equipment, so that the intelligent equipment is awakened.

Description

Technical Field

[0001] The utility model relates to the field of battery charging circuits, especially a charging intelligent wake-up circuit with a charging wake-up device inserted in the battery charging circuit of an intelligent device. Background Art

[0002] With the development of society, the technologies of new energy series products are changing with each passing day, the circuits are complex, and the line energy loss naturally increases. In order to reduce the battery energy loss, save energy, and extend the product service life, the product needs to be designed with an automatic timing shutdown function; that is, when some intelligent devices are powered on and not used for a long time, in order to save energy, etc., the CPU (MCU) will enter the sleep state and consume no energy to achieve the purpose of saving energy. For example, when a computer is not operated for a long time, it will automatically enter the sleep state. At this time, power-consuming devices such as the display do not work. When it is needed to be used, just press any key on the keyboard to trigger the CPU and wake up the computer to enter the working state. At this time, there is a wake-up circuit, which is activated by pressing the keyboard. In fact, there are many different modules in many intelligent devices. When the device is working, sometimes not all modules need to work. In order to save energy, these modules can also enter the sleep state separately. Or rather, the intelligent device itself has entered the sleep state, but there are still some modules that need to do work. Therefore, these modules will not enter the sleep state and need to be woken up. At present, intelligent devices such as mobile phones and laptops are generally in the standby (sleep) state when charging, but products that need to wake up the display state when charging and monitor the real-time charging state. Therefore, there is a need for a wake-up circuit to wake up when the charger is inserted. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a charging intelligent wake-up circuit that wakes up some functions of the intelligent device and monitors the real-time charging state when the charger is inserted for charging.

[0004] The technical solution adopted by the utility model to achieve its technical purpose is: a charging intelligent wake-up circuit introduces the working power supply to the power supply terminal of the MCU of the intelligent device; it includes an electronic switch arranged between the working power supply and the power supply terminal of the MCU. The electronic switch is controlled by an electronic switch control circuit. The electronic switch control circuit includes a charging detection circuit for detecting whether the charging power supply is inserted into the battery charging interface of the intelligent device, and an electronic switch driving circuit for generating a drive to close the electronic switch. When the battery charging interface of the intelligent device accesses the charging power supply, the electronic switch driving circuit drives the electronic switch to close, and the working power supply is connected to the power supply terminal of the MCU.

[0005] Further, in the above-mentioned charging intelligent wake-up circuit: the electronic switch is a MOS transistor Q1, the source and drain of the MOS transistor Q1 are electrically connected to the working power supply VCC and the VCC pin of the MCU respectively, and the gate of the MOS transistor is connected to the electronic switch driving circuit.

[0006] Further, in the above-mentioned charging intelligent wake-up circuit: the electronic switch driving circuit includes a resistor R1 and a MOS transistor Q2. The two ends of the resistor R1 are respectively connected to the working power supply and the gate of the MOS transistor Q1. The source and drain of the MOS transistor Q2 are respectively connected to the gate of the MOS transistor Q1 and the ground, and the gate of the MOS transistor Q2 is connected to the charging detection circuit. When the charging detection circuit detects that the battery charging interface of the intelligent device is connected to the charging power supply, it controls the MOS transistor Q2 to conduct.

[0007] Further, in the above-mentioned charging intelligent wake-up circuit: it further includes a resistor R2. One end of the resistor R2 is connected to the drain of the MOD transistor Q2, and the other end is connected to the common end where the resistor R1 is connected to the gate of the MOS transistor Q1.

[0008] Further, in the above-mentioned charging intelligent wake-up circuit: the charging detection circuit includes a capacitor C1 and a resistor R4. One end of the capacitor C1 is connected to the charging power supply terminal through the charging interface of the intelligent device, and the other end is connected to the gate of the MOS transistor. The resistor R4 is arranged between the gate and the source of the MOS transistor Q2.

[0009] Further, in the above-mentioned charging intelligent wake-up circuit: it further includes a diode D1. The anode of the diode D1 is grounded, and the cathode is connected to the charging power supply terminal through the capacitor C1.

[0010] Further, in the above-mentioned charging intelligent wake-up circuit: it further includes a resistor R3. One end of the resistor R1 is connected to the common end where the cathode of the diode is connected to the capacitor C1, and the other end is connected to the common end where the gate of the MOS transistor is connected to the resistor R4.

[0011] By using the circuit of the present invention, the working power supply is connected to the power supply terminal of the MCU of the intelligent device to realize the wake-up of the intelligent device.

[0012] The following further describes the present invention in conjunction with the drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG Figure 1 is the schematic diagram of the charging intelligent wake-up circuit of Embodiment 1 of the present invention. SPECIFIC EMBODIMENTS

[0014] This embodiment is a charging intelligent wake-up circuit that wakes up a device and monitors the charging process in real time when a smart device such as a mobile phone or a notebook is charging. For example Figure 1As shown, in this circuit, a MOS transistor Q1 is used as an electronic switch and is set between the operating power supply VCC of the device and the VCC pin of the MCU (CPU) chip of the device. At this time, the main power switch SW1 of the device is off. The operating power supply VCC is introduced to the VCC pin of the MCU chip by turning on the MOS transistor (closing the electronic switch).

[0015] The charging intelligent wake-up circuit of this embodiment introduces the operating power supply VCC to the power supply terminal VCC pin of the MCU of the intelligent device; it includes an electronic switch set between the operating power supply and the power supply terminal of the MCU. The MOS transistor Q1 is the electronic switch mentioned here. The electronic switch is controlled by an electronic switch control circuit. The electronic switch control circuit includes a charging detection circuit for detecting whether the charging power supply is inserted into the battery charging interface of the intelligent device, and an electronic switch drive circuit for generating a drive to close the electronic switch. When the battery charging interface of the intelligent device accesses the charging power supply, the electronic switch drive circuit drives the electronic switch to close, and the operating power supply is connected to the power supply terminal of the MCU. In this embodiment, the electronic switch is a MOS transistor Q1. The source and drain of the MOS transistor Q1 are electrically connected to the operating power supply VCC and the VCC pin of the MCU respectively, and the gate of the MOS transistor is connected to the electronic switch drive circuit. The electronic switch drive circuit includes a resistor R1 and a MOS transistor Q2. The two ends of the resistor R1 are connected to the operating power supply and the gate of the MOS transistor Q1 respectively. The source and drain of the MOS transistor Q2 are connected to the gate of the MOS transistor Q1 and the ground respectively. The gate of the MOS transistor Q2 is connected to the charging detection circuit. When the charging detection circuit detects that the battery charging interface of the intelligent device accesses the charging power supply, it controls the MOS transistor Q2 to conduct. In addition, it also includes a resistor R2. One end of the resistor R2 is connected to the drain of the MOD transistor Q2, and the other end is connected to the common terminal where the resistor R1 is connected to the gate of the MOS transistor Q1 and the resistor R1.

[0016] In this embodiment, the charging detection circuit includes a capacitor C1 and a resistor R4. One end of the capacitor C1 is connected to the charging power supply terminal through the charging interface of the intelligent device, and the other end is connected to the gate of the MOS transistor. The resistor R4 is set between the gate and the source of the MOS transistor Q2. It also includes a diode D1. The anode of the diode D1 is grounded, and the cathode is connected to the charging power supply terminal through the capacitor C1. The charging detection circuit also includes a resistor R3. One end of the resistor R1 is connected to the common terminal where the cathode of the diode is connected to the capacitor C1, and the other end is connected to the common terminal where the gate of the MOS transistor is connected to the resistor R4.

[0017] In this embodiment, when the MCU of an intelligent device such as a mobile phone or a laptop is in a sleep state, the charger (charging power supply) is inserted into CON1 of the intelligent device to charge the battery of the device. At this time, the capacitor C1 is instantaneously charged, and a high level is generated at the G pole of the resistor R3, the resistor R4, and the MOS transistor Q2, causing the MOS transistor Q2 to conduct, and then causing the MOS transistor Q1 to conduct and work. At this time, the charging power supply VCC voltage can wake up the MCU of the device to work, achieving real-time monitoring of the product charging status.

Claims

1. A charging intelligent wake-up circuit, which introduces the working power supply into the power supply terminal of the MCU of the smart device; characterized in that: The invention comprises an electronic switch arranged between a working power supply and a power supply terminal of an MCU, wherein the electronic switch is controlled by an electronic switch control circuit, wherein the electronic switch control circuit comprises a charging detection circuit for detecting whether a charging power supply is inserted into a battery charging interface of an intelligent device, and an electronic switch driving circuit for driving the electronic switch to close. When the battery charging interface of the intelligent device is connected to the charging power supply, the electronic switch driving circuit drives the electronic switch to close, and the working power supply is connected to the power supply terminal of the MCU.

2. The charging intelligent wake-up circuit according to claim 1, characterized in that: The electronic switch is a MOS tube Q1, the source and drain of the MOS tube Q1 are electrically connected to the working power supply VCC and the VCC pin of the MCU respectively, and the gate of the MOS tube is connected to the electronic switch driving circuit.

3. The charging intelligent wake-up circuit according to claim 2, characterized in that: The electronic switch driving circuit includes a resistor R1 and a MOS tube Q2, wherein the two ends of the resistor R1 are respectively connected to a working power supply and a gate of the MOS tube Q1, the source and drain of the MOS tube Q2 are respectively connected to the gate of the MOS tube Q1 and a ground, and the gate of the MOS tube Q2 is connected to a charging detection circuit. When the charging detection circuit detects that the battery charging interface of the smart device is connected to a charging power supply, the MOS tube Q2 is controlled to be turned on.

4. The charging intelligent wake-up circuit according to claim 3, characterized in that: It also includes a resistor R2, one end of which is connected to the drain of the MOD tube Q2, and the other end of which is connected to the common end of the resistor R1 and the gate of the MOS tube Q1 and the resistor R1.

5. The charging intelligent wake-up circuit according to claim 3, characterized in that: The charging detection circuit includes a capacitor C1 and a resistor R4. One end of the capacitor C1 is connected to the charging power supply end through the charging interface of the smart device, and the other end is connected to the gate of the MOS tube. The resistor R4 is arranged between the gate and the source of the MOS tube Q2.

6. The charging intelligent wake-up circuit according to claim 5, characterized in that: It also includes a diode D1, the anode of the diode D1 is grounded, and the cathode is connected to the charging power supply terminal through the capacitor C1.

7. The charging intelligent wake-up circuit according to claim 5, characterized in that: It also includes a resistor R3. One end of the resistor R1 is connected to the common end where the cathode of the diode is connected to the capacitor C1, and the other end is connected to the common end where the gate of the MOS tube is connected to the resistor R4.

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