5V power supply circuit

Abstract

The utility model relates to the technical field of sports equipment, in particular to a 5V power supply circuit, which comprises a power supply chip, a power supply voltage input circuit, a power supply voltage output circuit and a power supply voltage feedback and compensation circuit, compared with the prior art, wide voltage input and stable voltage output of the designed circuit can be ensured, the circuit is simple, the production cost is low, and the design is convenient. And the device is not easy to damage and low in maintenance cost.

Description

Technical Field

[0001] The utility model relates to the technical field of sports equipment, in particular to a 5V power supply circuit. Background Art

[0002] When using exercise equipment, electronic instrumentation systems require a stable DC power supply to ensure proper operation. Existing DC power supplies use standard voltage regulator chips, which suffer from high ripple, significant power supply interference, and unstable output switching, which can easily cause malfunctions and excessive operating errors, leading to significant problems. To improve reliable and stable power supply, stabilize quality, and reduce costs, a 5V power supply circuit was developed to enhance the quality and market competitiveness of fitness equipment. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a 5V power supply circuit.

[0004] To achieve the above purpose, a 5V power supply circuit is designed, which includes a power chip, a power voltage input circuit, a power voltage output circuit, a power voltage feedback and compensation circuit.

[0005] The power supply voltage input circuit includes a wiring terminal, wherein pin 1 of the wiring terminal is connected to pin 2 of the power chip, one end of capacitor 5, capacitor 7, and capacitor 8, the other ends of capacitor 5, capacitor 7, and capacitor 8 are grounded, pin 2 of the power chip is connected to one end of resistor 1, the other end of resistor 2 is connected to pin 7 of the power chip, and pin 2 of the wiring terminal is grounded.

[0006] The power supply voltage output circuit includes a diode 1, pin 3 of the power supply chip is connected to the negative electrode of the diode 1, one end of the capacitor 2, and one end of the inductor 1, the positive electrode of the diode 1 is connected to the 4th pin of the power supply chip and is grounded, the other end of the capacitor 2 is connected to the 1st pin of the power supply chip, the other end of the inductor 1 is connected to the 3rd pin of the terminal, one end of the capacitor 3, the capacitor 6, and the capacitor 9, and the other ends of the capacitor 3, the capacitor 6, and the capacitor 9 are grounded.

[0007] The power supply voltage feedback and compensation circuit includes resistor 2 and resistor 3, pin 5 of the power supply chip is connected to one end of resistor 2 and resistor 3, the other end of resistor 2 is connected to pin 3 of the wiring terminal, the other end of resistor 3 is grounded, pin 6 of the power supply chip is connected to one end of capacitor 4, the other end of capacitor 4 is connected to one end of resistor 4, and the other end of resistor 4 is grounded.

[0008] Pin 8 of the power chip is connected to one end of capacitor 1, and the other end of capacitor 1 is grounded.

[0009] The model of the power chip is CXW8509.

[0010] Capacitor 8 and capacitor 9 are electrolytic capacitors. The positive pole of capacitor 8 is grounded, and the negative pole of capacitor 8 is connected to pin 1 of the wiring terminal. The positive pole of capacitor 9 is connected to pin 3 of the wiring terminal, and the negative pole of capacitor 9 is grounded. The model of capacitor 8 is 100UF / 25V-DIP, and the model of capacitor 9 is 220UF / 16V-DIP.

[0011] The models of capacitors 1, 6 and 7 are all 104Z, the model of capacitor 2 is 103Z / 50V, the model of capacitor 3 is 22UF / 16V, the model of capacitor 4 is 392K / 50V, and the model of capacitor 5 is 106Z.

[0012] The model of the resistor 1 is 100K 1 / 6W 5%, the model of the resistor 2 is 47K 1 / 6W 5%, the model of the resistor 3 is 10K 1 / 6W 5%, and the model of the resistor 4 is 6.8K 1 / 8W 1%.

[0013] The model of the inductor 1 is 100 / 4A.

[0014] The model of the diode 1 is SS34.

[0015] The model of the wiring terminal is 2.5 / 3PIN 180.

[0016] Compared with the prior art, the utility model can ensure that the designed circuit has a wide voltage input and a stable voltage output, has a simple circuit, low production cost, is not easy to be damaged, and has low maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] like Figure 1As shown, the power supply voltage input circuit includes a terminal J1, pin 1 of the terminal J1 is connected to pin 2 of the power supply chip U1, one end of capacitor C5, capacitor C7, and capacitor C8, and the other ends of capacitor C5, capacitor C7, and capacitor C8 are grounded. Pin 2 of the power supply chip U1 is connected to one end of resistor R1, the other end of resistor R2 is connected to pin 7 of the power supply chip U1, pin 8 of the power supply chip U1 is connected to one end of capacitor C1, and the other end of capacitor C1 is grounded. Pin 2 of the terminal J1 is grounded. The power supply voltage output circuit includes a diode 1, pin 3 of the power supply chip U1 is connected to the negative electrode of diode 1, one end of capacitor C2, and one end of inductor L1, and the positive electrode of diode D1 is connected Pin 4 of the power chip U1 is connected to ground, the other end of capacitor C2 is connected to pin 1 of the power chip U1, the other end of inductor L1 is connected to pin 3 of the wiring terminal J1, one end of capacitor C3, capacitor C6, and capacitor C9, and the other ends of capacitor C3, capacitor C6, and capacitor C9 are grounded. The power supply voltage feedback and compensation circuit includes resistor R2 and resistor R3. Pin 5 of the power chip U1 is connected to one end of resistor R2 and resistor R3, the other end of resistor R2 is connected to pin 3 of the wiring terminal J1, and the other end of resistor R3 is grounded. Pin 6 of the power chip U1 is connected to one end of capacitor C4, the other end of capacitor C4 is connected to one end of resistor R4, and the other end of resistor R4 is grounded.

[0020] The model of the power chip U1 is CXW8509.

[0021] Capacitor eight C8 and capacitor nine C9 are electrolytic capacitors. The positive pole of capacitor eight C8 is grounded, and the negative pole of capacitor eight C8 is connected to pin 1 of terminal J1. The positive pole of capacitor nine C9 is connected to pin 3 of terminal J1, and the negative pole of capacitor nine C9 is grounded. The model of capacitor eight C8 is 100UF / 25V-DIP, and the model of capacitor nine C9 is 220UF / 16V-DIP.

[0022] The models of capacitor 1 C1, capacitor 6 C6, and capacitor 7 C7 are all 104Z, the model of capacitor 2 C2 is 103Z / 50V, the model of capacitor 3 C3 is 22UF / 16V, the model of capacitor 4 C4 is 392K / 50V, and the model of capacitor 5 C5 is 106Z.

[0023] Resistor R1 is 100K, 1 / 6W, 5%, Resistor R2 is 47K, 1 / 6W, 5%, Resistor R3 is 10K, 1 / 6W, 5%, Resistor R4 is 6.8K, 1 / 8W, 1%. Inductor L1 is 100 / 4A. Diode D1 is SS34. Terminal block J1 is a 2.5 / 3-pin 180.

[0024] When the present invention is in use, pin 1 (VDD) of terminal J1 serves as the power input, pin 2 (GND) serves as the ground, and pin 3 (VCC) serves as the power output. Capacitors C5, C7, and C8 in the power voltage input circuit are used for filtering and noise reduction. Capacitors C3, C6, and C9 in the power voltage output circuit are connected to ground at one end for filtering, energy storage, and voltage stabilization. Pin 5 of power chip U1 is connected to pin 3 of terminal J1 via resistor R2. Pin 5 of power chip U1 is also connected to ground via resistor R3, forming a voltage divider feedback circuit. Pin 6 of power chip U1 is connected to ground via capacitor C4 and resistor R4, forming a compensation circuit for closed-loop control of the compensation circuit. This allows feedback and compensation for the entire circuit, adjusting for power supply fluctuations in real time to output a stable power supply voltage. Soft-start time can be set via pin 8 of power chip U1.

[0025] The input voltage range of the circuit of the utility model is 5~24V. After being processed by the power supply chip U1, the output voltage is 5V2A, the voltage is stable and the power is large; it has a low-voltage locking function, and the minimum voltage is not lower than 4.5V to prevent other circuits from malfunctioning. The circuit is simple, the production cost is low, and it is not easy to be damaged, and the maintenance cost is also low.

Claims

1. A 5V power supply circuit, characterized in that: The invention comprises a power supply chip (U1), a power supply voltage input circuit, a power supply voltage output circuit, and a power supply voltage feedback and compensation circuit. The power supply voltage input circuit comprises a wiring terminal (J1), wherein pin 1 of the wiring terminal (J1) is connected to pin 2 of the power supply chip (U1), one end of capacitor 5 (C5), capacitor 7 (C7), and capacitor 8 (C8), and the other ends of capacitors 5 (C5), 7 (C7), and 8 (C8) are grounded. Pin 2 of the power supply chip (U1) is connected to one end of resistor 1 (R1), the other end of resistor 2 (R2) is connected to pin 7 of the power supply chip (U1), and pin 2 of the wiring terminal (J1) is grounded. The power supply voltage output circuit includes a diode 1, pin 3 of the power supply chip (U1) is connected to the negative electrode of the diode 1, one end of the capacitor 2 (C2), and one end of the inductor 1 (L1), the positive electrode of the diode 1 (D1) is connected to pin 4 of the power supply chip (U1) and grounded, the other end of the capacitor 2 (C2) is connected to pin 1 of the power supply chip (U1), the other end of the inductor 1 (L1) is connected to pin 3 of the terminal (J1), one end of the capacitor 3 (C3), the capacitor 6 (C6), and the capacitor 9 (C9), and the other ends of the capacitor 3 (C3), the capacitor 6 (C6), and the capacitor 9 (C9) are grounded. The power supply voltage feedback and compensation circuit includes a resistor 2 (R2) and a resistor 3 (R3), wherein pin 5 of the power supply chip (U1) is connected to one end of resistor 2 (R2) and resistor 3 (R3), the other end of resistor 2 (R2) is connected to pin 3 of a wiring terminal (J1), the other end of resistor 3 (R3) is grounded, and pin 6 of the power supply chip (U1) is connected to one end of capacitor 4 (C4), the other end of capacitor 4 (C4) is connected to one end of resistor 4 (R4), and the other end of resistor 4 (R4) is grounded.

2. The 5V power supply circuit according to claim 1, wherein: Pin 8 of the power chip (U1) is connected to one end of capacitor 1 (C1), and the other end of capacitor 1 (C1) is grounded.

3. The 5V power supply circuit according to claim 1, wherein: The model of the power chip (U1) is CXW8509.

4. The 5V power supply circuit according to claim 1, wherein: The capacitor eight (C8) and the capacitor nine (C9) are electrolytic capacitors. The positive pole of the capacitor eight (C8) is grounded, the negative pole of the capacitor eight (C8) is connected to pin 1 of the wiring terminal (J1), the positive pole of the capacitor nine (C9) is connected to pin 3 of the wiring terminal (J1), and the negative pole of the capacitor nine (C9) is grounded. The model of the capacitor eight (C8) is 100UF / 25V-DIP, and the model of the capacitor nine (C9) is 220UF / 16V-DIP.

5. The 5V power supply circuit according to claim 2, wherein: The models of capacitor 1 (C1), capacitor 6 (C6), and capacitor 7 (C7) are all 104Z, the model of capacitor 2 (C2) is 103Z / 50V, the model of capacitor 3 (C3) is 22UF / 16V, the model of capacitor 4 (C4) is 392K / 50V, and the model of capacitor 5 (C5) is 106Z.

6. The 5V power supply circuit according to claim 1, wherein: The model of the resistor 1 (R1) is 100K 1 / 6W 5%, the model of the resistor 2 (R2) is 47K 1 / 6W 5%, the model of the resistor 3 (R3) is 10K 1 / 6W 5%, and the model of the resistor 4 (R4) is 6.8K 1 / 8W 1%.

7. The 5V power supply circuit according to claim 1, wherein: The model of the inductor 1 (L1) is 100 / 4A.

8. The 5V power supply circuit according to claim 1, wherein: The diode 1 (D1) is of type SS34.

9. The 5V power supply circuit according to claim 1, wherein: The model of the terminal block (J1) is 2.5 / 3PIN 180.

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