CN215378559U

CN215378559U - Power management circuit

Info

Publication number: CN215378559U
Application number: CN202121359055.3U
Authority: CN
Inventors: 谢永涛; 叶继明; 张鹏飞; 李晓
Original assignee: Henan Gdlion Measurement & Control Technology Co ltd
Current assignee: Henan Gdlion Measurement & Control Technology Co ltd
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2021-12-31
Anticipated expiration: 2031-06-18

Abstract

The utility model aims to provide a power supply management circuit which can be embedded in a product to realize the switching of different power supplies, has small volume and low cost, can automatically open a lithium battery power supply channel by a control circuit after commercial power is cut off by directly embedding one or more lithium batteries in the product and adding the control circuit controlled and switched by an MOS (metal oxide semiconductor) tube to start supplying power to equipment, and has the advantages of low cost, small volume and convenience for embedding and inside the equipment compared with a UPS (uninterrupted power supply).

Description

Power management circuit

Technical Field

The utility model belongs to the technical field of power supply switching, and particularly relates to a power supply management circuit.

Background

At present, most Uninterrupted Power Supplies (UPS) are provided in the market to enable equipment to continuously work for a period of time after power failure, and market demands can be effectively met. However, in the application scenario of the internet of things miniaturized embedded product, the uninterruptible power supply has the obvious disadvantages of high cost, large volume, occupation of installation space and the like, so that a miniaturized product which can be directly embedded into the product and can realize switching of different input power supplies is required to solve the problem of high cost of the UPS power supply.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a power supply management circuit which can be embedded in a product to realize the switching of different power supplies and has small volume and low cost.

The technical scheme for solving the technical problems of the utility model is as follows: a power management circuit comprises an ADDC module, a BATTERY BATTERY module, a MOS tube Q1, a diode D1, a diode D2, a diode D3 and a control chip, wherein L, N of the ADDC module is connected with AC-220V, a GND end of the ADDC module is grounded, a VCC end of the ADDC module is connected with a charging end of the BATTERY BATTERY module, an output end of the BATTERY BATTERY module is connected with an anode of the diode D1, a cathode of the diode is connected with an S pole of a MOS tube Q1, a D pole of the MOS tube Q1 is connected with a cathode of the diode D3, an anode of a diode D3 is connected with the VCC end of the ADDC module, a G pole of the MOS tube is connected with a cathode of the diode D2, an anode of a diode D2 is connected between the charging end of the BATTERY BATTERY module and the anode of the diode D3, the power management circuit further comprises a resistor R1, one end of the resistor R1 is connected between a cathode of the diode D1 and the S pole of the MOS tube S1, the other end of the diode is connected between the G pole of the MOS tube and the cathode of the diode D2, a line Label1 between the cathode of the diode D2 and the resistor R1 is grounded through an automatic control grounding loop, and the control chip is used for controlling the automatic control grounding loop to be grounded or disconnected from the ground.

The automatic control grounding loop comprises a resistor R6, an NPN triode Q2, a resistor R5, a resistor R8 and an M _ CTRL control signal, one end of the resistor R6 is connected with a line Label1, the other end of the resistor R6 is connected with the C end of the NPN triode Q2, the E end of the NPN triode Q2 is grounded, the B end of the NPN triode Q2 is connected with one end of the resistor R5, the other end of the resistor R5 is connected with the M _ CTRL control signal, one end of the resistor R8 is connected between the resistor R5 and the B end of the NPN triode Q2, the other end of the resistor R8 is connected between the E end of the NPN triode Q2 and the ground, and the control chip is used for pulling up the M _ CTRL control signal after the power is supplied by the ADDC module and the product normally operates.

The circuit also comprises a manual control grounding circuit, the manual control grounding circuit comprises a KEY _ CTRL node, a diode D6, a KEY S1, a diode D7, a capacitor C2, a resistor R4, a diode D4 and an M _ Chk detection signal which are arranged between a resistor R6 and a C end of an NPN triode Q2, the KEY _ CTRL node is connected with an anode of a diode D6, a cathode of the diode D6 is connected with one contact of a KEY S1, the other contact of the KEY S1 is respectively connected with an anode of a diode D7, a ground and one end of a capacitor C2, a cathode of the diode D7 and the other end of a capacitor C2 are connected in parallel and then connected with one end of a KEY S9 and a cathode of a diode D6, a cathode of a diode D7 and the other end of a capacitor C2 are connected in parallel and then connected with one end of a line 6867 between one end of a KEY S1 and a cathode of a diode D6, and a cathode of a diode D4 of a diode D4, the anode of the diode D4 is connected with an M _ Chk detection signal, the output end of the M _ Chk detection signal is connected with the input end of the control chip, and the control chip controls the M _ CTRL control signal to be pulled down when the M _ Chk detection signal is a rising edge signal.

Still including VCC _ DEC detected signal, resistance R2, resistance R7 that is used for detecting whether the ADDC module supplies power, the VCC end at the ADDC module is connected to resistance R2's one end and between the charge end of BATTERY BATTERY module, resistance R2's the other end and resistance R7's one end are connected, resistance R7's other end ground, VCC _ DEC detected signal connects between resistance R2 surplus resistance R7, VCC _ DEC detected signal's output and control chip's input are connected.

The LED lamp further comprises a discharging loop, the discharging loop comprises a resistor R3, a capacitor C1 and a diode D5, one end of the capacitor C1 is grounded, the other end of the capacitor C1 is connected with one end of the resistor R3 and the anode of the diode D5 respectively, the cathode of the diode D5 is connected between the D pole of the MOS transistor and the cathode of the diode D3, and the other end of the resistor R3 is connected between the cathode of the diode D3 and the cathode of the diode D5.

The utility model has the beneficial effects that: through directly imbedding one section or multisection lithium cell in the product and increasing the control circuit who is switched by MOS pipe control messenger commercial power outage back control circuit automatic open lithium cell power supply channel, begin for equipment power supply, compare in UPS power have with low costs, small, be convenient for embed and the inside advantage of equipment.

Drawings

Fig. 1 is a circuit diagram of the present invention.

Fig. 2 is a circuit diagram of the automatic control ground loop of the present invention.

Fig. 3 is a circuit diagram of the manually controlled ground loop of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in FIG. 1, the utility model comprises an ADDC module, a BATTERY BATTERY module, a MOS tube Q1, a diode D1, a diode D2, a diode D3 and a control chip, wherein L, N of the ADDC module is connected with AC-220V, a GND end of the ADDC module is grounded, a VCC end of the ADDC module is connected with a charging end of the BATTERY BATTERY module, an output end of the BATTERY BATTERY module is connected with an anode of the diode D1, a cathode of the diode is connected with an S pole of a MOS tube Q1, a D pole of the MOS tube Q1 is connected with a cathode of the diode D3, an anode of the diode D3 is connected with the VCC end of the ADDC module, a G stage of the MOS tube is connected with a cathode of the diode D2, an anode of a diode D2 is connected between the charging end of the BATTERY BATTERY module and the anode of the diode D3, a resistor R1 is further included, one end of the resistor R1 is connected between a cathode of the diode D1 and the S stage of the MOS tube S3, the other end of the diode is connected between the G pole of the MOS tube and the cathode of the diode D2, a line Label1 between the cathode of the diode D2 and the resistor R1 is grounded through an automatic control grounding loop, and the control chip is used for controlling the automatic control grounding loop to be grounded or disconnected from the ground.

In this embodiment, the main loop power supply of the device is located between the cathode of the diode D3 and the D pole of the MOS transistor, which is denoted as VDD, and the device main loop power supply VDD is supplied by the VDD _5V, BATTERY output from the ADDC module and VCC _5V output from the BATTERY module, and when the BATTERY power is insufficient, VDD _5V charges the BATTERY through the charging terminal of the BATTERY module, and when the BATTERY is fully charged, the BATTERY module automatically enters the radial impulse mode.

As shown in FIG. 1, in this embodiment, the resistor R1 is 100K, R2 is 10K, R3 is 100R/0.25w, R4 is 120R, R5 is 1K, R6 is 10K, R7 is 10K, R8 is 4.7K, and C1 is 1F/5.5V.

The VCC _ DEC signal detects whether the current ADDC module supplies power, and the MOS tube Q1 controls whether the BATTERY BATTERY module supplies power for switching the power supply.

When the mains supply is supplied, the GS pin of the MOS tube Q1 is controlled by a VCC _5V, VDD _5V signal, so that GS =0, and the MOS tube is disconnected at the moment; when the mains supply is disconnected, if the signal Label1 does not form a ground circuit, the MOS transistor is disconnected at this time because GS =0 under the control of VCC _5V, R1, and when Label1 forms a ground circuit, the MOS transistor is turned on at this time because GS <0, and the BATTERY module starts to supply power.

As shown in fig. 2, a ground loop controlled by the M _ CTRL signal is formed by the NPN transistor Q2 and the BATTERY module, and when the ADDC module supplies power and the product normally operates, the control chip pulls up the M _ CTRL control signal to turn on the ground loop.

As shown in fig. 3, a ground loop is formed by the button S1 and the BATTERY module, when the ADDC module is not powered, the button S1 is pressed, the BATTERY ground loop is turned on, the BATTERY starts to be powered, and after the product normally operates, the control chip automatically pulls the control signal M _ CTRL high to turn on the ground loop shown in fig. 2, so that the button S1 can be released, and the product normally operates. At this time, the button S1 is pressed and released, the detection signal M _ Chk detects the rising edge signal, the M _ CTRL control signal is pulled low, the ground loop is broken, and the product device is powered off.

The farad capacitor C1 and the resistor R3 form a charging loop of the farad capacitor, and the C1 and the D5 form a discharging loop of the farad capacitor. When the power supply is switched, the battery module has delay time less than 1 second, the farad capacitor is used as a power supply at the moment, and after the battery module supplies power normally, VDD enables the farad capacitor to stop discharging. When the battery module and the ACDC module of the equipment are completely powered off, the farad capacitor continues to supply power, the power supply voltage is lower than 2.6V, and the whole equipment does not work any more.

The diode D3 is used for cutting off the current backflow of the device main loop VDD power supply to avoid the interference of the detection of a VCC _ DEC signal; the diode D2 is used for preventing the BATTERY module from forming a loop with the ACDC module when the BATTERY BATTERY module supplies power, and avoiding the abnormal shutdown function of the key; the diode D1 is used to cut off the current from VDD _5V to the power output terminal of the battery module when the mains supply is supplying.

According to the utility model, one or more lithium batteries are directly embedded into the product, and the control circuit switched by the MOS tube control is added, so that the control circuit automatically opens the lithium battery power supply channel after the mains supply is powered off, and starts to supply power for the equipment.

Claims

1. A power management circuit, comprising: the BATTERY charging system comprises an ADDC module, a BATTERY BATTERY module, a MOS tube Q1, a diode D1, a diode D2, a diode D3 and a control chip, wherein L, N of the ADDC module is connected with AC-220V, a GND end of the ADDC module is grounded, a VCC end of the ADDC module is connected with a charging end of the BATTERY BATTERY module, an output end of the BATTERY BATTERY module is connected with an anode of the diode D1, a cathode of the diode is connected with an S end of a MOS tube Q1, a D end of the MOS tube Q1 is connected with a cathode of the diode D3, an anode of the diode D3 is connected with the VCC end of the ADDC module, a G stage of the MOS tube is connected with a cathode of the diode D2, an anode of the diode D2 is connected between the charging end of the BATTERY BATTERY module and an anode of the diode D3, the BATTERY charging system further comprises a resistor R1, one end of the resistor R1 is connected between the cathode of the diode D1 and the S stage of the MOS tube, and the other end of the diode D2, the circuit Label1 between the cathode of the diode D2 and the resistor R1 is grounded through an automatic control ground loop, and the control chip is used for controlling the automatic control ground loop to be grounded or disconnected from the ground.

2. A power management circuit according to claim 1, wherein: the automatic control grounding loop comprises a resistor R6, an NPN triode Q2, a resistor R5, a resistor R8 and an M _ CTRL control signal, one end of the resistor R6 is connected with a line Label1, the other end of the resistor R6 is connected with the C end of the NPN triode Q2, the E end of the NPN triode Q2 is grounded, the B end of the NPN triode Q2 is connected with one end of the resistor R5, the other end of the resistor R5 is connected with the M _ CTRL control signal, one end of the resistor R8 is connected between the resistor R5 and the B end of the NPN triode Q2, the other end of the resistor R8 is connected between the E end of the NPN triode Q2 and the ground, and the control chip is used for pulling up the M _ CTRL control signal after the power is supplied by the ADDC module and the product normally operates.

3. A power management circuit according to claim 2, wherein: the circuit also comprises a manual control grounding circuit, the manual control grounding circuit comprises a KEY _ CTRL node arranged between a resistor R6 and a C end of an NPN triode Q2, a diode D6, a KEY S1, a diode D7, a capacitor C2, a resistor R4, a diode D4 and an M _ Chk detection signal, the KEY _ CTRL node is connected with an anode of the diode D6, a cathode of the diode D6 is connected with one contact of the KEY S1, the other contact of the KEY S1 is respectively connected with an anode of the diode D7, a ground and one end of a capacitor C2, the cathode of the diode D7 and the other end of the capacitor C2 are connected in parallel and then connected between one end of the KEY S1 and a cathode of the diode D6, the cathode of the diode D7 and the other end of a capacitor C2 are connected in parallel and then connected with one end of a line resistor R4 between one end of the KEY S1 and a cathode of the diode D6, and the cathode of the diode D4 of the resistor R4, the anode of the diode D4 is connected with an M _ Chk detection signal, the output end of the M _ Chk detection signal is connected with the input end of the control chip, and the control chip controls the M _ CTRL control signal to be pulled down when the M _ Chk detection signal is a rising edge signal.

4. A power management circuit according to claim 1, wherein: still including VCC _ DEC detected signal, resistance R2, resistance R7 that is used for detecting whether the ADDC module supplies power, the VCC end at the ADDC module is connected to resistance R2's one end and between the charge end of BATTERY BATTERY module, resistance R2's the other end and resistance R7's one end are connected, resistance R7's other end ground, VCC _ DEC detected signal connects between resistance R2 surplus resistance R7, VCC _ DEC detected signal's output and control chip's input are connected.

5. A power management circuit according to claim 1, wherein: the LED lamp further comprises a discharging loop, the discharging loop comprises a resistor R3, a capacitor C1 and a diode D5, one end of the capacitor C1 is grounded, the other end of the capacitor C1 is connected with one end of the resistor R3 and the anode of the diode D5 respectively, the cathode of the diode D5 is connected between the D pole of the MOS transistor and the cathode of the diode D3, and the other end of the resistor R3 is connected between the cathode of the diode D3 and the cathode of the diode D5.