Simple and efficient direct-current voltage-stabilized source for laboratory

Abstract

A simple and efficient direct-current voltage-stabilized source for a laboratory is composed of a step-down transformer, a first rectifier filter circuit, a +5 V voltage-stabilized circuit, an output voltage rough adjustment switch, a second rectifier filter circuit, a +1.25 V to 28 V adjustable voltage-stabilized circuit, a first soft start circuit, a -1.25 V to 28 V adjustable voltage-stabilized circuit and a second soft start circuit. The connecting relation is shown in the appended drawing. A three-end integrated voltage stabilizer with the excellent performance is adopted by the voltage-stabilized circuits, a plurality of rings of precision linear adjustable potentiometers are adopted by the output voltage for adjustment, the voltage rough adjustment switch is utilized for achieving low-voltage difference control over an adjusting pipe, the +5 V stabilized direct-current voltage and the + / -1.25 V to 28 V continuous adjustable direct-current voltage can be output at the same time, and the largest output currents are 1.5 A. The simple and efficient direct-current voltage-stabilized source has the advantages of being good in voltage stabilizing performance, high in adjustment precision, small in output ripple voltage, simple in circuit, low in failure rate, perfect in protection function and high in efficiency.

Description

technical field [0001] The invention relates to the technical field of DC stabilized power supplies, in particular to a simple and efficient DC stabilized power supply for laboratories. Background technique [0002] DC regulated power supply is the most commonly used instrument in electronic laboratories. Adjustable DC regulated power supply is widely used in teaching, scientific research and maintenance of electronic products and other fields. Switching regulated power supply has high efficiency, but high ripple voltage, high noise, complex circuit, high failure rate and difficult maintenance. The traditional linear DC regulated power supply has the advantages of good voltage stabilization performance, small output ripple voltage, simple circuit, low failure rate, and convenient maintenance. The main disadvantages are the large voltage drop of the regulator tube, high power consumption, and high efficiency relatively low. Contents of the invention [0003] In order to s...

AI Technical Summary

Problems solved by technology

The switching regulated power supply has high efficiency, but the ripple voltage is high, the noise is large, the circuit is complicated, the failure rate is high, and the maintenance is difficult

The traditional linear DC regulated power supply has the advantages of good voltage stabilization performance, small output ripple voltage, simple circuit, low failure rate, and convenient maintenance. The main disadvantages are the large voltage drop of the regulator tube, high power consumption, and high efficiency relatively low

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