Wide-range adjustable self-switching voltage source based on BUCK circuit

A wide-range, voltage source technology, applied in electrical components, regulating electrical variables, control/regulating systems, etc., can solve problems such as power drop, and achieve the effect of improving voltage conversion efficiency

Inactive Publication Date: 2018-07-24
CHINA ACAD OF AEROSPACE AERODYNAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem solved by the invention is: Aiming at the problem that it is difficult for the switching power supply in the prior art to identify the characteristics of the received signal and control the circuit on and off accordingly, a wide-range adjustable self-on-off voltage source based on the BUCK circuit is proposed , overcome the problem of power drop caused by internal circuit design of existing small and medium-sized switching power supplies

Method used

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  • Wide-range adjustable self-switching voltage source based on BUCK circuit
  • Wide-range adjustable self-switching voltage source based on BUCK circuit
  • Wide-range adjustable self-switching voltage source based on BUCK circuit

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Embodiment Construction

[0029] A wide range adjustable self-on-off voltage source based on BUCK circuit, such as figure 1 As shown, including PWM control circuit, high-speed optocoupler isolation circuit, totem pole circuit, BUCK main circuit, among which:

[0030] PWM control circuit: the PWM pulse signal is generated by the CPLD chip and used as the input of the high-speed optocoupler isolation circuit;

[0031] High-speed optocoupler isolation circuit: Receive the PWM pulse signal sent by the PWM control circuit and convert it into an optical signal for internal transmission, and then convert the optical signal obtained after internal transmission into a PWM pulse signal as the input of the totem pole circuit;

[0032] Totem pole circuit: Receive the PWM pulse signal sent from the high-speed optocoupler isolation circuit, perform push-pull output through the internal transistor according to the level of the PWM pulse signal, and use the output PWM pulse signal as the input of the BUCK main circuit...

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Abstract

A wide-range adjustable self-switching voltage source based on a BUCK circuit comprises a PWM control circuit, a high-speed optical coupling isolation circuit, a totem pole circuit, a BUCK main circuit. A PWM pulse signal is generated and output by a CPLD chip, and is subjected to input and output isolation by a high-speed optical coupler. Then the totem pole circuit provides a discharge loop forthe junction capacitance of a MOS transistor and increases the drive capability. Finally the BUCK main circuit forms a resonant loop switch structure, determines the level of a level signal to controlthe charge and discharge of the entire circuit the stable output of voltage, and finally outputs adjustable DC voltage. The wide-range adjustable self-switching voltage source based on a BUCK circuithas high reliability and good stability.

Description

technical field [0001] The invention relates to a wide range adjustable self-on-off voltage source based on a BUCK circuit, which belongs to the field of power control circuits. Background technique [0002] Switching power supply is a power supply that uses modern power electronics technology to control the time ratio of power semiconductor devices being turned on and off to maintain a stable output voltage. Compared with linear power supplies, switching power supplies have advantages in terms of efficiency, volume, and weight. Especially, high-frequency switching power supplies are becoming lighter, smaller, more efficient, and more reliable, which makes high-frequency switching power supplies widely used in industrial Automation control, military equipment, scientific research equipment, industrial control equipment, digital products and other fields. From the perspective of the composition of the switching power supply, it is mainly composed of two parts: power stage an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/156H02M1/08
CPCH02M3/156H02M1/08
Inventor 滕朝华王续南高维金姜金俊张立志
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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