CN213185892U

CN213185892U - Wide-input working power supply voltage system for pet water dispenser

Info

Publication number: CN213185892U
Application number: CN202022214109.9U
Authority: CN
Inventors: 伍权沾
Original assignee: Taishan Kangda Electric Appliance Products Co ltd
Current assignee: Taishan Kangda Electric Appliance Products Co ltd
Priority date: 2020-10-08
Filing date: 2020-10-08
Publication date: 2021-05-11
Anticipated expiration: 2030-10-08

Abstract

The utility model discloses a pet water dispenser is with wide input working power supply voltage system, including J1 socket, output voltage V1_ VOUT, U1_ MCU and U5_ MCU, through PCB printing copper line electric connection between J1 socket and the output voltage V1_ VOUT, and be equipped with condenser C1 on the PCB printing copper line between J1 socket and the output voltage V1_ VOUT respectively, condenser C2, condenser C3, condenser C6, resistance R1, triode Q2, diode D1 and NMOS pipe Q1, resistance R2, resistance R3. The wide-input working power supply voltage system for the pet water dispenser comprises a BUCK voltage reduction circuit consisting of NMOS tubes Q1, L1, D1, C3 and C6, so that the output voltage reaches a stable required output voltage after being filtered by C3 and C6. Through continuous closed-loop detection, the appropriate PWM duty ratio is controlled by the whole process of U5, so that the output reaches the required stable output voltage, and the phenomena that products are burnt out due to overhigh voltage or normal use is influenced due to overlow voltage and the like are avoided.

Description

Wide-input working power supply voltage system for pet water dispenser

Technical Field

The utility model belongs to the technical field of the operating power supply voltage system, concretely relates to pet water dispenser is with wide input operating power supply voltage system.

Background

At present, a certain working voltage range or even a specific value exists in a common electric appliance. A voltage stabilizing source may be provided on the external power supply interface, and the input range of the voltage stabilizing source determines the external input voltage requirement range of the set of electric appliances. The input voltage of the existing similar products is of a single type, namely a power supply with fixed voltage or small voltage range span. The product has strict requirements on voltage, the product is burnt out when the voltage is too high, and the product cannot be normally used when the voltage is too low. Therefore, in order to solve the above problems, a wide input operating power voltage system for a pet drinking machine is required.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pet drinking machine is with wide input working power supply voltage system to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a wide-input working power supply voltage system for a pet water dispenser comprises a J1 socket, an output voltage V1_ VOUT, a U1_ MCU and a U1_ MCU, wherein the J1 socket is electrically connected with the output voltage V1_ VOUT through a PCB printed copper wire, a capacitor C1, a resistor R1, a triode Q1, a diode D1, an NMOS tube Q1, a resistor R1 and a resistor R1 are respectively arranged on the PCB printed copper wire between the J1 socket and the output voltage V1_ VOUT, a voltage sampling network consisting of the resistor R1 and the U1_ MCU is electrically connected through a conducting wire, a triode Q1, a triode Q36Q 1, a diode D1, a resistor R1 and a resistor R1 are respectively arranged on the conducting wire between the resistor R1 and the U1_ MCU, a PWM switching circuit consisting of the resistor R1, the resistor R1 and the PCB printed copper wire are respectively connected with the PCB 1 and the PCB 1_ MCU 1 through the PCB printed copper wire, and the PCB 1, The capacitor C10 and the voltage stabilizing integrated U2 form a voltage sampling circuit.

Preferably, the U1_ MCU is respectively provided with a capacitor C7, a capacitor C8 and a capacitor C9 to form a normal operating voltage required by the U5_ MCU.

Preferably, the transistor Q2 is disposed on a conductor between the resistor R1 and the NMOS transistor Q1.

Preferably, the resistor R1 is electrically connected to the pin P19 of the U5_ MCU through a wire via the resistor R22 and the transistor Q3.

Preferably, the resistor R2 is electrically connected to the pin P8 of the U5_ MCU through a PCB printed copper wire.

The utility model discloses a technological effect and advantage: the wide-input working power supply voltage system for the pet water dispenser comprises a BUCK voltage reduction circuit consisting of NMOS tubes Q1, L1, D1, C3 and C6, so that the output voltage reaches a stable required output voltage after being filtered by C3 and C6. Through continuous closed-loop detection, the appropriate PWM duty ratio is controlled by the whole process of U5, so that the output reaches the required stable output voltage, and the phenomena that products are burnt out due to overhigh voltage or normal use is influenced due to overlow voltage and the like are avoided.

Drawings

FIG. 1 is a schematic diagram of a wide power supply voltage input BUCK step-down power supply circuit of the present invention;

fig. 2 is a schematic diagram illustrating the wide power supply voltage input BUCK power supply of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a wide input working power supply voltage system for pet water dispenser as shown in fig. 1-2, including J1 socket, output voltage V1_ VOUT, U1_ MCU and U5_ MCU, pass through PCB printed copper line electric connection between J1 socket and output voltage V1_ VOUT, and be equipped with condenser C1, resistance R1, triode Q1, diode D1 and NMOS pipe Q1 on the PCB printed copper line between J1 socket and output voltage V1_ VOUT respectively, resistance R1, pass through the wire electric connection between the voltage sampling network that resistance R1, resistance R1 constitute and the U1_ MCU, and be equipped with triode Q1, diode D1, resistance R1 and the resistance R1 _ MCU on the wire respectively, the specific PWM switch circuit that resistance R1 and NMOS 1 constitute is set up between the resistance R1 and the NMOS 1 on the triode Q1, the power adapter output voltage is delivered to the primary power network via the J1 socket connection. Filtering and stabilizing voltage through C1 and C2 ceramic capacitors. At the moment of power-on, because the voltage on the main control board cannot reach the value output by the power adapter due to the existence of C1 and C2, Q1 enables Q2 to be rapidly turned on and further enables Q1 to be turned off because the R1 provides the base current of Q2, and the output voltage V1_ VOUT is 0V at the moment;

the resistor R2 is electrically connected with the U5_ MCU through a PCB printed copper wire, a resistor R3, a capacitor C10 and a voltage stabilizing integrated U2 are arranged on the PCB printed copper wire between the resistor R2 and the U5_ MCU respectively to form a voltage sampling circuit, concretely, the U1_ MCU is provided with a normal working voltage required by the U5_ MCU formed by the capacitor C7, the capacitor C8 and the capacitor C9 respectively, concretely, the resistor R1 is electrically connected with a P19 pin of the U5_ MCU through a resistor R22 and a triode Q3 through a lead wire, concretely, the resistor R2 is electrically connected with a P8 pin of the U5_ MCU through the PCB printed copper wire, and when the system voltage rises gradually, the U5MCU can be reset normally. The voltage of U5 is regulated by U1, and the voltage ripple value used by U5 is ensured to be in the required range of U5 after filtering by C8 and C9. The J1 socket connection delivers to the primary side power supply network. First, after the reset of the U5 is completed, the program initializes all the ports, the pin P19 of the U5 is set to output low state to control the Q3 to be turned off, and the pin P18 is set to input high state to detect the voltage value of V1_ VOUT. When the initialization of both the PWM module and the ADC module in U5 is completed. The P19 pin of U5 is turned on for 0.1S time to control Q3 to be turned on, after Q3 is turned on, the base voltage of Q2 cannot reach the on-voltage and is turned off, at the moment, Q1 is discharged through D2 and Q3 primary side power supplies, further the on-output voltage V1_ VOUT of Q1 is controlled, after V1_ VOUT is divided by R2 and R3, the P15 pin of U5 detects the R3 voltage, after the R3 voltage is read by the U5 internal ADC module, the operation result is sent to the PWM module after the U5 internal program operation, the PWM duty ratio is set, so that the Q1 is controlled to be turned on and off by the driving circuit consisting of Q3, Q2, D2 and R1, and the BUCK voltage reduction circuit consisting of L1, D1, C3 and C6 makes the output voltage reach the stable required output voltage after being filtered by C3 and C6. The proper PWM duty ratio is controlled by the U5 through the continuous closed loop detection, so that the output reaches the required stable output voltage.

Here, wide input supply voltage, input voltage range: between DC 5V and DC 15V, high and low voltage automatic conversion BUCK power supply is used inside, the current output voltage value is detected automatically, the relation between input voltage and output voltage is adjusted, and the product works in a safe interval all the time.

According to the wide-input working power supply voltage system for the pet water dispenser, the output voltage of the power supply adapter is connected and transmitted to a primary side power supply network through the J1 socket. Filtering and stabilizing voltage through C1 and C2 ceramic capacitors. At the moment of power-on, the voltage on the main control board cannot reach the value output by the power adapter due to the existence of the C1 and the C2, the Q1 enables the Q2 to be rapidly turned on and further enables the Q1 to be turned off because the R1 provides the base current of the Q2, and the output voltage V1_ VOUT is 0V at the moment. When the system voltage rises gradually until the U5MCU can be reset normally. The voltage of U5 is regulated by U1, and the voltage ripple value used by U5 is ensured to be in the required range of U5 after filtering by C8 and C9. The J1 socket connection delivers to the primary side power supply network. First, after the reset of the U5 is completed, the program initializes all the ports, the pin P19 of the U5 is set to output low state to control the Q3 to be turned off, and the pin P18 is set to input high state to detect the voltage value of V1_ VOUT. When the initialization of both the PWM module and the ADC module in U5 is completed. The P19 pin of U5 is turned on for 0.1S time to control Q3 to be turned on, after Q3 is turned on, the base voltage of Q2 cannot reach the on-voltage and is turned off, at the moment, Q1 is discharged through D2 and Q3 primary side power supplies, further the on-output voltage V1_ VOUT of Q1 is controlled, after V1_ VOUT is divided by R2 and R3, the P15 pin of U5 detects the R3 voltage, after the R3 voltage is read by the U5 internal ADC module, the operation result is sent to the PWM module after the U5 internal program operation, the PWM duty ratio is set, so that the Q1 is controlled to be turned on and off by the driving circuit consisting of Q3, Q2, D2 and R1, and the BUCK voltage reduction circuit consisting of L1, D1, C3 and C6 makes the output voltage reach the stable required output voltage after being filtered by C3 and C6. The proper PWM duty ratio is controlled by the U5 through the continuous closed loop detection, so that the output reaches the required stable output voltage.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The utility model provides a pet drinking machine is with wide input working power supply voltage system, includes J1 socket, output voltage V1_ VOUT, U1_ MCU and U5_ MCU, its characterized in that: the socket J1 is electrically connected with the output voltage V1_ VOUT through a PCB printed copper wire, a capacitor C1, a capacitor C2, a capacitor C3, a resistor R3, a triode Q3, a diode D3, an NMOS tube Q3, a resistor R3 and a resistor R3 are arranged on the PCB printed copper wire between the socket J1 and the output voltage V1_ VOUT respectively, a voltage sampling network formed by the resistor R3 and the resistor R3 is electrically connected with the U3 _ MCU through a conducting wire, a PWM (pulse width modulation) switching circuit formed by the triode Q3, the diode D3, the resistor R3 and the resistor R3 is arranged on the conducting wire between the resistor R3 and the U3 _ MCU respectively, and a resistor R3, a capacitor C3 and a voltage stabilizing integrated circuit formed by the capacitor U3 are arranged on the printed copper wire between the resistor R3 and the PCB 3 _ MCU respectively.

2. The wide input working power supply voltage system for the pet drinking machine according to claim 1, characterized in that: the U1_ MCU is respectively provided with a capacitor C7, a capacitor C8 and a capacitor C9 to form a normal working voltage required by the U5_ MCU.

3. The wide input working power supply voltage system for the pet drinking machine according to claim 1, characterized in that: the triode Q2 is arranged on a conducting wire between the resistor R1 and the NMOS transistor Q1.

4. The wide input working power supply voltage system for the pet drinking machine according to claim 1, characterized in that: the resistor R1 is electrically connected with the P19 pin of the U5_ MCU through a resistor R22 and a triode Q3 by a lead.

5. The wide input working power supply voltage system for the pet drinking machine according to claim 1, characterized in that: the resistor R2 is electrically connected with the P8 pin of the U5_ MCU through a PCB printed copper wire.