A pulse synchronization method in a switching power supply control circuit

By dynamically adjusting the pulse triggering time in a multiphase interleaved parallel power supply system using charge flow feedback signals and derivative analysis, the problem of interphase charge accumulation caused by load jumps is solved, the stability and synchronization of the pulse sequence are achieved, and interphase circulating current and magnetic core saturation are eliminated.

CN121907197BActive Publication Date: 2026-07-17BEIJING JIAJIE HENGXIN ENERGY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING JIAJIE HENGXIN ENERGY TECH CO LTD
Filing Date
2026-03-23
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

When the load changes rapidly, the fixed phase difference in existing multiphase interleaved parallel power supply systems causes some phase charge to accumulate, leading to interphase circulating current, transient core saturation, and a surge in output ripple. Existing technologies cannot maintain the physical rationality of the pulse sequence under complex operating conditions.

Method used

By acquiring the charge flow distribution feedback signal of each pulse generation branch, the first and second derivatives are used to identify current distortion, a sensing model is established and the current distortion component is removed, the charge flow imbalance deviation is calculated, and the pulse triggering time is adjusted using a nonlinear damping operator and phase correction increment to achieve automatic synchronization of the pulse generator.

Benefits of technology

Without changing the duty cycle, the pulse phase is dynamically adjusted to eliminate interphase energy deviation, avoid interphase circulating current and core saturation, and improve the system's stability under dynamic load and its resilience to extreme transient shocks.

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Abstract

This invention relates to the field of synchronous control technology for pulse generators, and discloses a pulse synchronization method in a switching power supply control circuit, comprising: acquiring the feedback signal sequence of the pulse branch and extracting the current gradient characteristics; establishing a sensing model based on the branch current derivative, and removing nonlinear distortion components to generate an effective adjustment signal; calculating the charge-to-flow-per-second imbalance deviation between pulse branches, and establishing a phase adjustment redundancy buffer based on the distortion amplitude; and determining the time-domain offset of the trigger pulse using a nonlinear damping operator. This invention senses the evolution of the response characteristics of the associated energy storage components, uses time-domain displacement to offset the energy asymmetry caused by hardware characteristic mismatch, maintains the charge-to-flow-per-second balance under dynamic load, eliminates interphase circulating current and core saturation, ensures the physical continuity of the synchronization logic, and improves the start-up and operation stability of the pulse generator.
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