High-power high-precision switch linear combined manostat

Abstract

The invention discloses a high power high accuracy switching linear compound potentiostat, which comprises the following parts: one output voltage reference forming unit and one power conversion unit, wherein the output voltage reference forming unit is provided power by input terminal power, which includes TL431 precision voltage-stabiliser tube N1, bleeder circuit conposed of resistance R1, R2 and adjustable resistance VR1; the power conversion unit is composed of fluidic devices; the collector connects input end; the base electrode connects to reference voltage signal; the emitting electrode connects to stabilivolt outlet end; the voltage reference forming unit can output continuance adjustable reference voltage signal with high accuracy, low noise, which outputs stabilised initialize voltage according to given reference voltage signal; the power conversion unit works in marginal saturated exlinear condition; the input and output voltage difference reduces to 1V; the output current can reach 5A; the stabilivolt accuracy can get 0.5%.

Description

Technical field: [0001] The invention belongs to the power electronic power conversion technology and specifically designs a high-power high-precision switching linear composite voltage stabilizer. Background technique: [0002] Modern electronic equipment and communication equipment often require several DC power supplies with different voltage levels. For example, IC memory and CPU almost all need 5V or 3.3V power supply; A / D and D / A need ±12V or ±5V power supply; LCD backlight Need 5V, 12V or 24V power supply and so on. In addition to the requirements of different voltage levels, some occasions also require high voltage regulation accuracy and high current output to ensure the normal and reliable operation of the equipment. High-precision and high-power voltage regulation chips have a wide range of application markets. [0003] There are a variety of such chips with regulated output function, such as LDC low-dropout series regulated chips, which can output high-precision...

AI Technical Summary

Problems solved by technology

[0003] There are a variety of such chips with regulated output function, such as LDC low-dropout series regulated chips, which can output high-precision regulated output, but the output current is only a few hundred milliamperes; LM78XX, LM79XX series are widely used The maximum output current of the voltage regulator block can only reach 1A, and there is a basic voltage difference of 2V, which results in high power consumption and high heat generation; if a larger working current of a few amperes is required, an external high-power regulator tube is generally used to expand the current, resulting in The most important thing is the reduction of voltage stabilization accuracy; or use the same model and specification, multi-chip parallel connection with the same polarity to expand the current, but it is difficult to achieve automatic current sharing between the single chips

Chinese patent ZL00112420.X does not have the function of outputting a high-precision, low-noise continuously adjustable voltage reference signal powered by the input power supply

Images