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Precision Output Control For Dc Voltage Regulators

A technology of voltage regulators and shunt regulators, applied in the direction of converting DC power input to DC power output, adjusting electrical variables, and controlling/regulating systems, etc.

Active Publication Date: 2014-09-10
ASTEC INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the DC output voltage is 5V, the actual value of the feedback voltage may be greater or less than 0.8V due to component tolerances, line and load regulation differences, etc.
For this reason, a nominal feedback voltage of 0.8V may have an associated tolerance such as ±2.5%

Method used

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  • Precision Output Control For Dc Voltage Regulators
  • Precision Output Control For Dc Voltage Regulators
  • Precision Output Control For Dc Voltage Regulators

Examples

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Embodiment Construction

[0017] Example embodiments will now be described more fully with reference to the accompanying drawings.

[0018] Example embodiments are provided so that this disclosure will be thorough, and will fully convey the scope to those who are skilled in the art. Numerous specific details are set forth, such as examples of specific components, devices and methods, to provide a thorough understanding of embodiments of the present disclosure. It will be apparent to those skilled in the art that specific details need not be employed, that example embodiments may be embodied in many different forms and that neither should be construed to limit the scope of the disclosure. In some example embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.

[0019] The techniques used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. As used herein, the singular may also...

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Abstract

A power supply is provided to achieve precision output control for dc voltage regulators. The power supply includes an input terminal, an output terminal, a DC voltage regulator coupled between the input terminal and the output terminal to provide a substantially constant DC output voltage at the output terminal, a voltage divider coupled between the output terminal and ground (e.g., earth ground or another suitable reference potential), the voltage divider including at least a first resistance, a second resistance and a first node between the first resistance and the second resistance, the first node coupled to the DC voltage regulator to provide a feedback voltage to the DC voltage regulator for regulating the DC output voltage, and an adjustable shunt regulator coupled between the output terminal and the first node.

Description

technical field [0001] The present disclosure relates to precision output control for direct current (DC) voltage regulators. Background technique [0002] This section provides background information related to the present disclosure which is not necessarily prior art. [0003] DC voltage regulators are employed in many applications to supply a constant DC voltage to various loads. As shown in FIG. 1 , a DC voltage regulator may have a voltage divider coupled between its output terminals for providing a feedback voltage to a feedback (FB) input. A DC voltage regulator uses a feedback voltage to regulate its DC output voltage Vout. For example, a specific DC voltage regulator design may employ a feedback voltage having a nominal value of 0.8V when the DC output voltage is 5V. However, when the DC output voltage is 5V, the actual value of the feedback voltage may be greater or less than 0.8V due to component tolerances, line and load regulation differences, etc. For this ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/10H02M3/156
CPCH02M3/156H02M3/02
Inventor 罗伯特·亨利·基普利布鲁斯·阿伦·弗雷德里克
Owner ASTEC INT LTD