A multi-stage power supply, a multi-stage power supply system, a calibration method, and a power supply device
By adding a sampling circuit to the multi-stage power supply and calibrating the output voltage and differential voltage control loop, the problems of low calibration accuracy and low efficiency caused by analog control loop competition in the prior art are solved, and a more efficient power supply system performance is achieved.
CN115864837BActive Publication Date: 2026-06-23HUAWEI DIGITAL POWER TECH CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUAWEI DIGITAL POWER TECH CO LTD
- Filing Date
- 2021-09-24
- Publication Date
- 2026-06-23
AI Technical Summary
Technical Problem
Existing calibration methods for multi-stage power supplies fail to effectively address the problem of competition in analog control loops, resulting in low calibration accuracy and potentially reduced efficiency.
Method used
By adding sampling circuits for output voltage and differential voltage control loops to multi-stage power supplies and calibrating these loops through a controller, control accuracy and efficiency can be improved.
Benefits of technology
By calibrating the output voltage and differential voltage control loop, the calibration accuracy and efficiency of the multi-stage power supply are improved, excessively high differential voltage across the linear power supply is avoided, and the overall performance of the power supply system is improved.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN115864837B_ABST
Abstract
The application provides a multi-stage power supply, a multi-stage power supply system, a calibration method and a power supply device, and relates to the technical field of power supply. The multi-stage power supply comprises a switching power supply, a linear power supply, an output voltage control loop, a differential voltage control loop, a first sampling circuit and a first controller. The first sampling circuit samples the output voltage of the linear power supply; the first controller controls the linear power supply by the output voltage control loop, and calibrates the output voltage control loop according to the output voltage reference value of the linear power supply and the sampling result of the first sampling circuit. The multi-stage power supply can further comprise a second sampling circuit for sampling the voltage difference between the linear power supply; the first controller controls the linear power supply by the differential voltage control loop, and calibrates the differential voltage control loop according to the differential voltage reference value of the linear power supply and the sampling result of the second sampling circuit. The output voltage sampling circuit of the switching power supply can be calibrated by using the calibrated linear power supply, and the calibration accuracy and calibration efficiency are improved.
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