基于ADP1046A控制的两级DC-DC变换器设计

为了解决通信二次电源数字控制及宽范围输入的问题，实现高功率密度的DC-DC变换，提出了以ADP1046A为核心控制器的两级变换拓扑实现方案。实现了调压与隔离分级，即通过Buck电路实现输入到目标电压的调节，通过全桥电路实现输入与输出的隔离。该方案利用ADP1046A的标准I²C接口实现电源控制与上位机的通信，两级变换不仅能够解决单级变换中变压器体积庞大，难以优化的问题，且可减小输出滤波器体积。利用所搭建的试验样机对相关功能、性能进行验证，试验结果表明，所提DC-DC变换器方案满足相应产品的需求，对于工程设计具有现实的指导意义。

Design of Two-Stage DC-DC Converter Based on ADP1046A Control

In order to solve the problems of digital control and wide-range input of communication secondary power supply, and realize high power density DC-DC conversion, an implementation scheme of two-stage conversion topology with ADP1046A as the core controller is proposed. The voltage regulation and isolation are implemented in different stages, that is, to achieve the adjustment of the input to the target voltage through the Buck circuit, and the isolation between the input and output through the full bridge circuit. This solution uses the standard I²C interface of ADP1046A to realize the communication between the power control and the host computer. The two stage conversion can not only solve the problem of large transformer size and difficulty in optimization in single stage conversion, but also greatly reduce the size of the output filter. Using the built experimental prototype to verify the related functions and performance, the experimental results show that the proposed DC DC converter scheme meets the needs of the corresponding products and has practical guiding significance for engineering design.