Voltage adjustment circuit and program-controlled power supply
A technology of voltage adjustment circuit and reference voltage source, which is applied to electrical components, adjustment of electrical variables, control/regulation systems, etc., can solve problems such as difficulty in data processing, and achieve the effect of high control accuracy and simple operation.
Active Publication Date: 2019-04-30
KUSN INFOVISION OPTOELECTRONICS
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Problems solved by technology
[0007] but if figure 2 Although the shown DC power supply realizes the program-controlled adjustable voltage, the accuracy of the digital potentiometer is only ±20%, and it is far from the theoretical value set by the program, and the voltage is nonlinear and irregular with the program set value. Changes, the data processing process is more difficult
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[0040] Various embodiments of the invention will be described in more detail below with reference to the accompanying drawings. In the various drawings, the same elements are denoted by the same or similar reference numerals. For the sake of clarity, various parts in the drawings have not been drawn to scale.
[0041] The invention can be embodied in various forms, some examples of which are described below.
[0042] image 3 A schematic diagram of the circuit structure of the voltage adjustment circuit provided by the embodiment of the present invention is shown. The voltage adjustment circuit is used to adjust the output voltage Vout of the switching power supply chip 10, and the switching power supply chip includes an input terminal IN (not shown in the figure), an output terminal OUT and a feedback terminal FB. like image 3 As mentioned above, the voltage adjustment circuit 20 includes a first resistor R1 and a level shift module 21 .
[0043] Wherein, the first resi...
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The invention discloses a voltage regulating circuit for regulating an output voltage of a switch power chip; the switch power chip comprises a voltage input end, a voltage output end and a voltage feedback end; the voltage regulating circuit comprises: a first resistor connected between the voltage output end and voltage feedback end of the switch power chip; a level shift module connected between the voltage feedback end and ground end of the switch power chip and used for changing a level of the voltage feedback end of the switch power chip in order to regulate a voltage of the voltage output end of the switch power chip. The invention also provides a programmable power supply, the level of the voltage feedback end of the switch power chip is changed through the level shift module to change a resistance ratio of a first resistance to a second resistance such that the output voltage of the switch power chip is regulated, operating is simple, and control precision is high.
Description
technical field [0001] The invention belongs to the technical field of power supplies, and more specifically relates to a voltage adjustment circuit and a program-controlled power supply. Background technique [0002] Programmable DC power supply is an essential equipment in automatic test system. In the process of national modernization, various automatic test systems have emerged as the times require, directly serving civil fields such as scientific research and production, and the demand for program-controlled DC power systems is also increasing. In various automatic test systems, such as base station test systems and electronic equipment system-level automatic test platforms, high-precision, low-noise programmable power supplies are required, and the voltage is required to be programmable. Programmable DC power supply is an ideal device to provide bias power and incentives to components or final products in an automatic test environment, and is an essential test instrum...
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IPC IPC(8): H02M3/156
CPCH02M3/156
Inventor 王博刘胜利周永超常琳双强
Owner KUSN INFOVISION OPTOELECTRONICS