Isolated converter and control method and control circuit therefor

CN115242101BActive Publication Date: 2026-05-29NANJING SILERGY SEMICON TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING SILERGY SEMICON TECH CO LTD
Filing Date
2022-08-05
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing isolation converters require additional communication control hardware in intermittent mode, which increases the converter size and reduces the isolation voltage level, failing to meet the size and isolation voltage requirements of some applications.

Method used

By setting transmission and sleep states in each working cycle of the isolation converter, information is transmitted using the transformer between the primary and secondary circuits. The secondary drive circuit excites the transformer in the sleep state, and the working state is switched by the potential or current information in the primary circuit, thereby stabilizing the output signal.

Benefits of technology

Without the need for additional independent communication control hardware, the converter size is reduced while maintaining the isolation voltage level, achieving stable control of the output signal.

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  • Figure CN115242101B_ABST
    Figure CN115242101B_ABST
Patent Text Reader

Abstract

Disclosed are an isolated converter and a control method and control circuit thereof. In the isolated converter in an intermittent mode, when a primary circuit excites a transformer, a secondary circuit can recognize the working state of the primary circuit through the change of potential or current in the secondary circuit; the secondary circuit can also excite the transformer during the stop of power transmission, so that the primary circuit recognizes the control information that the secondary circuit wants to deliver through the change of potential or current in the primary circuit, thereby realizing the control of the output signal of the isolated converter.
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