一种超低纹波电源调控系统
By using auxiliary windings and peak detection circuits to obtain current signals in multiphase parallel DC-DC converters, combining window comparators and RC networks for phase-cutting decisions, and utilizing a current sharing deviation correction module to achieve phase-by-phase current sharing control, the problems of large ripple, low current sharing accuracy, and high power consumption under light loads in multiphase converters are solved, achieving ultra-low ripple output and high efficiency under all operating conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHAANXI STARS ELECTRONICS TECH CO LTD
- Filing Date
- 2026-05-13
- Publication Date
- 2026-07-17
AI Technical Summary
Existing digital control schemes for multiphase parallel DC-DC converters suffer from problems such as large transient ripple during phase cutting, current sharing accuracy constrained by the discreteness of device parameters, and the loss of phase cutting efficiency gain due to the power consumption of the controller itself under light load conditions.
The phase current signal acquisition module acquires the peak current signal of each phase inductor through the auxiliary winding of the main power inductor and the peak detection circuit. The phase cutting decision is made by combining the window comparator array and the RC charge-discharge switching network. The current sharing deviation correction module realizes phase-by-phase current sharing control through the resistor averaging network and the transconductance amplifier array to ensure a smooth transition of the phase cutting process.
It achieves ultra-low ripple output under all operating conditions, avoids phase-cutting transient ripple, improves current sharing accuracy, reduces controller power consumption under light load conditions, and improves power efficiency.
Smart Images
Figure CN122178707B_ABST