A self-restoring circuit

By designing auxiliary power supply module and switching module, the PWM chip can automatically recover power supply after a short circuit in the power output line, which solves the problem that the PWM chip cannot automatically recover power supply in the existing technology, simplifies the circuit structure and reduces the impact on the power supply circuit.

CN122178240APending Publication Date: 2026-06-09SHANDONG LONGERTEK TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG LONGERTEK TECH CO LTD
Filing Date
2024-12-09
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing PWM chips cannot automatically restore power supply after a short circuit in the power output line, and existing self-recovery circuits require the addition of multiple components, resulting in complex circuitry and significant impact on the power supply circuit.

Method used

The design employs an auxiliary power supply module and a switching module. The auxiliary power supply module first supplies power to the PWM chip, and after the main power supply module starts up, it switches to supply power to the main power supply module. The switching module controls the switching of the power supply path to realize the self-recovery function of the PWM chip.

Benefits of technology

The circuit structure was simplified, the impact on the main power supply and load loop was reduced, the self-recovery power supply of the PWM chip was realized, and the later maintenance was simplified.

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    Figure CN122178240A_ABST
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Abstract

The application discloses a self-recovery circuit and relates to the technical field of power supply control. The self-recovery circuit comprises an auxiliary power supply module, a main power supply module and a switching module. The charging end of the auxiliary power supply module is connected with an auxiliary power supply device, and the power supply end of the auxiliary power supply module is connected with a PWM chip. The charging end of the main power supply module is connected with a main power supply device, and the power supply end of the main power supply module is connected with the PWM chip. The switching module is connected in parallel with the PWM chip, the input end of the switching module is connected with the power supply end of the main power supply module, the output end of the switching module is connected with the control end of the auxiliary power supply module, and the switching module controls the on-off of the auxiliary power supply module through the control end. After the main power supply device enters a protection state, the switching module turns on the auxiliary power supply module, so that the auxiliary power supply module supplies power to the PWM chip again, and the self-recovery function of the PWM chip is realized.
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Citation Information

Patent Citations

  • CN112993933A