Low-cost adjustable voltage-stabilized power supply

Abstract

The utility model discloses a low-cost adjustable voltage-stabilized power supply, which relates to the technical field of electronics and comprises a transformer T1, a diode D1, a diode D2, a diode D3, a diode D4, a diode VD1, a diode VS1, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a chip U1, a resistor R1, a resistor R2, an adjustable resistor RP and a voltmeter pv. The utility model solves the problems of overhigh cost and lack of price competitiveness of the whole product caused by uncontrollable development cycle, has the advantages of low cost, low power consumption, good performance, simple circuit structure, wide voltage regulation range and small occupied space, and does not need to spend too much debugging time.

Description

Technical Field

[0001] The utility model relates to the field of electronic technology, in particular to a low-cost adjustable voltage-stabilized power supply. Background Art

[0002] With the popularization and development of electronic devices, regulated power supplies play an increasingly important role in daily life and industrial production. However, traditional regulated power supplies often have problems such as high cost and inconvenient adjustment, which limits their application in some fields. Therefore, the development of a low-cost, adjustable regulated power supply practical circuit is of great significance to meet market demand and promote technological development.

[0003] In recent years, the price competition of consumer electronic products is fierce. International trade has caused significant changes in the local consumer electronics industry, leading to an intensified market competition trend and the cost of consumer electronic products being compressed. Especially for the main control MCU in the product, cost control is more intense. While ensuring the performance of electronic products, price has become a strict consideration point, and the supply of ICs is extremely unstable. In this case, low cost, low power consumption, good stable performance, short development cycle, and practical circuits controlled by discrete components hardware are required.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0005] In view of the problems in the related technology, the utility model proposes a low-cost adjustable voltage-stabilized power supply to overcome the above technical problems existing in the existing related technology.

[0006] To this end, the specific technical solutions adopted by the utility model are as follows:

[0007] A low-cost adjustable voltage-stabilized power supply comprises a transformer T1, a diode D1, a diode D2, a diode D3, a diode D4, a diode VD1, a diode VS1, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a chip U1, a resistor R1, a resistor R2, an adjustable resistor RP and a voltmeter PV; wherein the third end of the transformer T1 is connected to the positive electrode of the diode D1 and the negative electrode of the diode D2 in sequence, the fourth end of the transformer T1 is connected to the negative electrode of the diode D3 and the positive electrode of the diode D4 in sequence, the negative electrode of the diode D1 is connected to the negative electrode of the diode D4, the positive electrode of the capacitor C1, one end of the capacitor C3 and the third end of the chip U1 in sequence, the positive electrode of the diode D2 is connected to the positive electrode of the diode D3 in sequence, and the positive electrode of the diode D3 is connected to the positive electrode of the diode D4 in sequence. The positive electrode, the negative electrode of capacitor C1, the positive electrode of capacitor C2, the fifth end of transformer T1, the other end of capacitor C3, the negative electrode of diode VS1, the first end of chip U1, the third end of adjustable resistor RP, the second end of adjustable resistor RP, one end of resistor R1, one end of capacitor C4 and the second end of voltmeter pv are connected and grounded; the sixth end of transformer T1 is connected to the negative electrode of diode VD1, the positive electrode of diode VD1 is connected to the negative electrode of capacitor C2 and one end of resistor R2 in sequence, the other end of resistor R2 is connected to the positive electrode of diode VS1 and the first end of adjustable resistor RP in sequence, and the second end of chip U1 is connected to the other end of resistor R1, the other end of capacitor C4 and the first end of voltmeter pv in sequence.

[0008] Furthermore, the resistor R1 and the resistor R2 are both metal film resistors.

[0009] Furthermore, the capacitor C1 and the capacitor C2 are both aluminum electrolytic capacitors.

[0010] Furthermore, the capacitor C3 and the capacitor C4 are both electrolytic capacitors.

[0011] Furthermore, the diode D1 , the diode D2 , the diode D3 , the diode D4 and the diode VD1 are all silicon-type rectifier diodes.

[0012] Furthermore, the diode VS1 is a silicon Zener diode.

[0013] Furthermore, the adjustable resistor RP is an organic solid fine-tuning variable resistor.

[0014] The beneficial effects of the utility model are:

[0015] The utility model provides a low-cost adjustable voltage-stabilized power supply, which can reduce production costs, effectively solve the high cost pressure brought by IC prices and unstable supply, and MCU development solutions, and can also solve the problem of high overall product costs and lack of price competitiveness caused by uncontrollable development cycles. The utility model has the advantages of low cost, low power consumption, good performance, simple circuit structure, wide voltage adjustment range, and small space occupation, and does not require too much debugging time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 The present invention is a circuit diagram of a low-cost adjustable voltage-regulated power supply according to an embodiment of the present invention. DETAILED DESCRIPTION

[0018] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0019] According to an embodiment of the utility model, a low-cost adjustable voltage-regulated power supply is provided.

[0020] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1As shown, according to an embodiment of the utility model, the low-cost adjustable voltage-stabilized power supply includes a transformer T1, a diode D1, a diode D2, a diode D3, a diode D4, a diode VD1, a diode VS1, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a chip U1, a resistor R1, a resistor R2, an adjustable resistor RP and a voltmeter pv; wherein, the third end of the transformer T1 is connected to the positive electrode of the diode D1 and the negative electrode of the diode D2 in sequence, the fourth end of the transformer T1 is connected to the negative electrode of the diode D3 and the positive electrode of the diode D4 in sequence, the negative electrode of the diode D1 is connected to the negative electrode of the diode D4, the positive electrode of the capacitor C1, one end of the capacitor C3 and the third end of the chip U1 in sequence, and the positive electrode of the diode D2 is connected to the positive electrode of the diode D3 and the positive electrode of the diode D4 in sequence. The positive electrode of diode D3, the negative electrode of capacitor C1, the positive electrode of capacitor C2, the fifth end of transformer T1, the other end of capacitor C3, the negative electrode of diode VS1, the first end of chip U1, the third end of adjustable resistor RP, the second end of adjustable resistor RP, one end of resistor R1, one end of capacitor C4 and the second end of voltmeter pv are connected and grounded; the sixth end of transformer T1 is connected to the negative electrode of diode VD1, the positive electrode of diode VD1 is connected to the negative electrode of capacitor C2 and one end of resistor R2 in sequence, the other end of resistor R2 is connected to the positive electrode of diode VS1 and the first end of adjustable resistor RP in sequence, and the second end of chip U1 is connected to the other end of resistor R1, the other end of capacitor C4 and the first end of voltmeter pv in sequence.

[0021] In one embodiment, the resistor R1 = 120Ω and the resistor R2 = 680Ω are 1 / 2W metal film resistors.

[0022] In one embodiment, the capacitor C1 = 2200uf and the capacitor C2 = 100uf are aluminum electrolytic capacitors with withstand voltages of 50V and 10V respectively.

[0023] In one embodiment, capacitor C3=0.1uf and capacitor C4=1uf are CD11-50V electrolytic capacitors.

[0024] In one embodiment, diode D1 , diode D2 , diode D3 , diode D4 and diode VD1 are IN4007 silicon rectifier diodes.

[0025] In one embodiment, diode VS1 is selected from IN4106 or 2CW60 silicon Zener diode.

[0026] In one embodiment, the adjustable resistor RP is a WSW type organic solid fine-tuning variable resistor.

[0027] In one embodiment, the transformer T1 is a 10W power transformer with secondary side voltages N2 and N3 of 35V and 6V.

[0028] The utility model has a simple circuit structure, and can work normally only by welding according to the circuit diagram and ensuring that the selected components are correct without debugging.

[0029] A practical circuit with completely discrete electronic components and adjustable regulated power supply.

[0030] The circuit structure is simple, the cost is low, the space occupied is small, and the voltage adjustment range is wide.

[0031] Conventional component selection is safe and reliable, and can meet normal operation without debugging.

[0032] It is easy to manufacture and maintain, has strong load capacity, and can be widely used in various electronic equipment.

[0033] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.

[0034] In practical application, IC uses LM317-ADJ three-terminal voltage regulator integrated circuit. After adding 220V AC voltage to the primary side N1 of transformer T1 through transformer T1, the secondary sides N2 and N3 of transformer T1 obtain 35V and 6V AC voltages respectively. The secondary side N2 of transformer T1 is rectified by diode D1-diode D4, and filtered by capacitor C1 and capacitor C3 to obtain 35V DC voltage, which is then input to the LM317-ADJ input end of IC three-terminal integrated voltage regulator circuit (i.e. U1). The 35V DC voltage is output through IC voltage regulator integrated circuit, adjustable resistor RP, resistor R1 and capacitor C4. The 6V AC voltage output by the auxiliary coil N3 on the secondary side of transformer T1 outputs a negative voltage of -1.25V as auxiliary power supply through diode VD1, capacitor C2, adjustable resistor RP and voltage regulator diode VS1. The variable resistor RP is added to the control end of the IC integrated circuit, and through the adjustable resistor RP, the output end can output a wide range of DC voltage of about 0-30V.

[0035] In summary, the low-cost adjustable voltage-stabilized power supply provided by the utility model can reduce production costs, effectively solve the high cost pressure brought by IC prices and unstable supply, and MCU development solutions, and can also solve the problem of excessively high product costs and lack of price competitiveness caused by uncontrollable development cycles. The low-cost adjustable voltage-stabilized power supply of the utility model has the advantages of low cost, low power consumption, good performance, simple circuit structure, wide voltage adjustment range, and small space occupation, and does not require too much debugging time.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-cost adjustable voltage-stabilized power supply, characterized in that: Including transformer T1, diode D1, diode D2, diode D3, diode D4, diode VD1, diode VS1, capacitor C1, capacitor C2, capacitor C3, capacitor C4, chip U1, resistor R1, resistor R2, adjustable resistor RP and voltmeter pv; Wherein, the third end of the transformer T1 is connected to the positive electrode of the diode D1 and the negative electrode of the diode D2 in sequence, the fourth end of the transformer T1 is connected to the negative electrode of the diode D3 and the positive electrode of the diode D4 in sequence, the negative electrode of the diode D1 is connected to the negative electrode of the diode D4, the positive electrode of the capacitor C1, one end of the capacitor C3 and the third end of the chip U1 in sequence, the positive electrode of the diode D2 is connected to the positive electrode of the diode D3, the negative electrode of the capacitor C1, the positive electrode of the capacitor C2, the fifth end of the transformer T1, the other end of the capacitor C3, the negative electrode of the diode VS1, the first end of the chip U1, the third end of the adjustable resistor RP, the second end of the adjustable resistor RP, one end of the resistor R1, one end of the capacitor C4 and the second end of the voltmeter pv in sequence and are connected to ground; The sixth end of the transformer T1 is connected to the cathode of the diode VD1, the anode of the diode VD1 is connected to the cathode of the capacitor C2 and one end of the resistor R2 in sequence, the other end of the resistor R2 is connected to the anode of the diode VS1 and the first end of the adjustable resistor RP in sequence, and the second end of the chip U1 is connected to the other end of the resistor R1, the other end of the capacitor C4 and the first end of the voltmeter pv in sequence.

2. A low-cost adjustable voltage-regulated power supply according to claim 1, characterized in that: The resistor R1 and the resistor R2 are both metal film resistors.

3. A low-cost adjustable voltage-regulated power supply according to claim 1, characterized in that: The capacitor C1 and the capacitor C2 are both aluminum electrolytic capacitors.

4. A low-cost adjustable voltage-regulated power supply according to claim 1, characterized in that: The capacitor C3 and the capacitor C4 are both electrolytic capacitors.

5. A low-cost adjustable voltage-regulated power supply according to claim 1, characterized in that: The diode D1 , the diode D2 , the diode D3 , the diode D4 , and the diode VD1 are all silicon-type rectifier diodes.

6. A low-cost adjustable voltage-regulated power supply according to claim 1, characterized in that: The diode VS1 is a silicon Zener diode.

7. A low-cost adjustable voltage-regulated power supply according to claim 1, characterized in that: The adjustable resistor RP is an organic solid fine-tuning variable resistor.

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