Device and method for improving stability of DC-DC converter

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By using external radiation-resistant reinforced operational amplifiers, parallel capacitors and diodes in DC-DC converters, and introducing compensation units, the problem of insufficient stability in radiation resistance and input surge current is solved, and higher stability and radiation resistance are achieved.

CN119743005APending Publication Date: 2025-04-01NO 24 RES INST OF CETC

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Patent Information

Application Number: CN202510023126.9
Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner
Filing Date: 2025-01-07
Publication Date: 2025-04-01

Application Information

Patent Timeline

07 Jan 2025

Application

CN202510023126.9

01 Apr 2025

Publication

CN119743005A

IPC: H02M1/32; H02M3/00; H02H9/02

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Application Domain

Dc-dc conversion Emergency protective arrangements for limiting excess voltage/current

Technology Topics

Control signal Control cell

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AI Technical Summary

Technical Problem

Existing DC-DC converters are inadequate in terms of radiation resistance and input surge current, resulting in fluctuations in output voltage and abnormal start-up.

Method used

The stability of the DC-DC converter is improved by using an external radiation-resistant reinforcement of the operational amplifier, a parallel capacitor and a diode, and the introduction of a compensation unit.

Benefits of technology

It effectively improves the radiation resistance and stability of the DC-DC converter, reduces the input surge current, and avoids startup abnormalities and system instability.

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Abstract

The invention discloses a device and a method for improving the stability of a DC-DC converter. The device comprises a control unit, a voltage dividing unit and a feedback unit, a reference signal input end of the voltage division unit is electrically connected with a reference signal output end of the control unit so as to perform voltage division on a reference signal output by the control unit to obtain a voltage division signal; the voltage dividing signal output end of the voltage dividing unit is electrically connected with the voltage dividing signal input end of the feedback unit, and the voltage signal input end of the feedback unit is connected with a voltage signal actually output by the DC-DC converter; the feedback signal output end of the feedback unit is electrically connected with the feedback signal input end of the control unit, and the control unit is used for outputting a corresponding control signal according to a received feedback signal so as to control the output voltage of the DC-DC converter to be kept within a set range. According to the DC-DC converter, the external radiation hardening operational amplifier is adopted to replace an internal operational amplifier at the feedback signal input end of the PWM controller, the influence of the radiation environment on a feedback loop of the DC-DC converter is reduced, and the stability of the DC-DC converter is improved.

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