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Device and method for trimming output voltage of voltage adjuster

A technology of voltage regulator and output voltage, which is applied in the direction of adjusting electric variables, fine-tuning resistors, control/regulation systems, etc., and can solve problems such as increasing chip size

Active Publication Date: 2012-05-23
CHENGDU MONOLITHIC POWER SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using multiple sets of independent series feedback resistors to divide the output voltage to provide multiple different feedback voltages, although trimming is easy to implement, it is limited by the power consumption of the voltage regulator circuit and the size of the chip. increased at the expense of

Method used

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  • Device and method for trimming output voltage of voltage adjuster
  • Device and method for trimming output voltage of voltage adjuster

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Embodiment Construction

[0071] The output trimming device and trimming method of the voltage regulator of the embodiment of the present invention will be described in detail below, as well as the voltage regulator circuit adopting the trimming device and trimming method. In the following description, some specific details, such as specific circuit structures in the embodiments and specific parameters of these circuit elements, are used to provide a better understanding of the embodiments of the present invention. Those skilled in the art can understand that the embodiments of the present invention can be implemented even in the absence of some details or the combination of other methods, elements, materials, and the like.

[0072] An embodiment of the present invention provides a voltage regulator circuit, which uses the following trimming device and trimming method to trim its output voltage.

[0073] Different embodiments of the present invention also provide output voltage trimming devices and trimming...

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Abstract

The invention discloses a device and a method for trimming an output voltage of a circuit of a voltage adjuster, and relates to the circuit of the voltage adjuster, aiming at providing a simple and easy trimming circuit, so that the trimming power consumption of the circuit of the voltage adjuster can be reduced, and the size of a chip can be reduced. The trimming device provided by the embodiment of the invention is used for dividing the output voltage of the circuit of the voltage adjuster by a set of voltage dividing devices which are connected with one another in series and generating a plurality of different feedback voltages which show the output voltage, wherein the different feedback voltages correspond to the different output voltage values of the output voltage one by one; the different feedback voltages are sequentially trimmed, so that the different output voltage values can be sequentially trimmed; and the former trimmed output voltage value can not be influenced by the trimming of the later output voltage value.

Description

Technical field [0001] The invention relates to a voltage regulator, in particular to an output voltage adjustment device of a voltage regulator circuit. Background technique [0002] Voltage regulators are widely used as power sources in various electronic devices. Most voltage regulators adopt negative feedback regulation, which can provide accurate and stable output voltage for their load. In some applications, it is also hoped that the voltage regulator can provide multiple accurate and stable output voltages with different levels for its load, for example, when the voltage regulator is used to linearly charge multiple different batteries. figure 1 A schematic diagram of a voltage regulator circuit 100 is shown, which includes a power conversion unit 101, a control unit 103, and a feedback unit 105. The voltage regulator 100 receives an unregulated input voltage Vin and provides a regulated output voltage Vout. The feedback unit 105 receives the output voltage Vout and provi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
CPCG05F1/575H01C17/22
Inventor 李伊珂周江云
Owner CHENGDU MONOLITHIC POWER SYST
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