Current-sharing method based on UCC29002

A current sharing bus, DC-DC technology, applied in the direction of output power conversion device, DC power input conversion to DC power output, instruments, etc., can solve the problems of high current pressure of converters, converter power system failures, etc., to achieve High accuracy of current sharing, high load regulation and good dynamic response

Inactive Publication Date: 2019-06-14
LUOYANG LONGSHENG SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In practical applications, the characteristics of each DC-DC converter working in parallel cannot be completely consistent. If no measures are taken, a certain converter will be subjected to a large current pressure, causing failure of the converter or even the entire power system.

Method used

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  • Current-sharing method based on UCC29002
  • Current-sharing method based on UCC29002
  • Current-sharing method based on UCC29002

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Embodiment Construction

[0016] The present invention can be explained in more detail by the following examples, and the present invention is not limited to the following examples;

[0017] combined with Figure 1~3 The described current sharing method based on UCC29002, the current sharing method adopts the working mode of the maximum current automatic current sharing method, utilizes the internal current detection amplifier, error amplifier and external current detection resistor of the UCC29002 chip, and cooperates with + / - The DC-DC converter on the Sense side can efficiently and reliably complete the current sharing of multiple DC-DC converters.

[0018] Wherein said UCC29002 is an 8-pin current sharing controller of the maximum current automatic current sharing method.

[0019] Such as figure 2 shown, the external current sense resistor ( figure 2 Middle R SHUNT ) A signal proportional to the output current of the DC-DC converter is detected at the output of the DC-DC converter, and sent t...

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Abstract

A current-sharing method based on UCC29002 relates to the technical field of power electronics. By adopting the working mode of a maximum current automatic current-sharing method in the invention, users can only adjust values of a sense resistor RSHUNT, amplification factor ACSA of a current detection amplifier, an adjusting resistor RADJ and error amplifier compensators REAO and CEAO according toa specific parallel system. The invention has simple peripheral circuit, high current-sharing precision, high load adjustment rate, good dynamic response, which provides a new solution for parallel operation of a DC-DC converter with +/- Sense terminal, suitable for wide promotion and application.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a UCC29002-based current sharing method. Background technique [0002] It is known that with the continuous development of power electronics technology, the demand for output current is increasing, and a single DC-DC converter can no longer meet the load requirements of high current, and multiple DC-DC converters need to be used in parallel to meet the requirements. high current requirements. Parallel current sharing technology can reduce current stress and improve system reliability. [0003] In practical applications, the characteristics of each DC-DC converter working in parallel cannot be completely consistent. If no measures are taken, a certain converter will be subjected to a large current pressure, causing failure of the converter or even the entire power system. Contents of the invention [0004] In order to overcome the deficiencies in the background techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/156
Inventor 代大志孙长喜
Owner LUOYANG LONGSHENG SCI & TECH
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