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Multi-circuit processing type voltage-stabilized switching power supply

A switching power supply and processing technology, applied in the electronic field, can solve problems such as output voltage and current instability, achieve the effect of increasing output power, maintaining stable input voltage, and ensuring stability

Inactive Publication Date: 2016-10-12
CHENGDU SAIPUQI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of unstable output voltage and current in the power supply of electronic products in the prior art, and provide a multi-circuit processing type regulated switching power supply

Method used

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  • Multi-circuit processing type voltage-stabilized switching power supply
  • Multi-circuit processing type voltage-stabilized switching power supply
  • Multi-circuit processing type voltage-stabilized switching power supply

Examples

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Embodiment

[0021] Such as figure 1 As shown, the present invention is mainly composed of a voltage stabilizing chip U2, a diode rectifier U1, a triode VT1, a positive electrode connected to the positive output terminal of the diode rectifier U1, a negative electrode connected to the negative output terminal of the diode rectifier U1, and a grounded polarity capacitor C1. One end of the resistor R1 is connected to the emitter of the transistor VT1, the other end is connected to the IN pin of the voltage regulator chip U2, the positive pole is connected to the IN pin of the voltage regulator chip U2, and the negative pole is connected to the emitter of the transistor VT1 Polar capacitor C2, one end is connected to the GND pin of the voltage regulator chip U2, the other end is connected to the negative output terminal of the diode rectifier U1, the resistor R2 is connected to the voltage control output circuit of the voltage regulator chip U2, and connected in series The third-order harmoni...

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Abstract

The invention discloses a multi-circuit processing type voltage-stabilized switching power supply, which is characterized by mainly comprising a voltage-stabilized chip U2, a diode rectifier U1, a triode VT1, a polar capacitor C1, a resistor R1, a polar capacitor C2, a resistor R2, a voltage control output circuit, a third-order harmonic cancellation circuit, an over-voltage and over-current protection circuit connected with the base electrode of the triode VT1, and a comparison amplifying circuit connected in series between the over-voltage and over-current protection circuit and the voltage control output circuit. The voltage-stabilized chip U2 preferentially adopts a TH78H5 integrated chip. Due to the arrangement of the above chip and a peripheral circuit, the problem that the step-down rectification effect of the input voltage is not stable in the prior art can be solved. Meanwhile, the electromagnetic interference in the input current is eliminated. Therefore, the output current and the output voltage are ensured to be stable. The operation stability of electronic products is ensured effectively.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a multi-circuit processing type stabilized switching power supply. Background technique [0002] With the development of science and technology, the functions of electronic products are becoming more and more powerful, so higher requirements are put forward for the power supply of electronic products. However, the power supply of existing electronic products has the problem of unstable output voltage and current, which leads to unstable operation of electronic products and cannot meet people's requirements. [0003] Therefore, it is imperative to provide a power supply for electronic products that can output stable voltage and current. Contents of the invention [0004] The purpose of the present invention is to overcome the defects of unstable output voltage and current in the power supply of electronic products in the prior art, and provide a multi-circuit processing type stabiliz...

Claims

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Application Information

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IPC IPC(8): H02M1/44H02M1/12H02M1/34H02M7/217
CPCH02M1/12H02M1/34H02M1/44H02M7/2173H02M1/325H02M1/348
Inventor 不公告发明人
Owner CHENGDU SAIPUQI TECH CO LTD
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