多路精确稳压输出的数字DC-DC变换器设计

Design of digital DC-DC converter with multiple precise voltage regulation outputs

数字电路具有功率密度高、控制方法灵活、参数可调、一致性好、抗干扰能力强、可操控性好等优点,是未来高能量密度、高可靠、智能化电源的发展方向。以常用的XX28512型DC-DC为例,采用推挽拓扑+同步Buck (Buck/Boost)电路结构,设计了一款三路独立闭环控制、精确稳压、输出可调的数字DC-DC变换器,通过测试,达到了设计预期。

Digital circuit has the advantages of high power density,flexible control method,adjustable parameters,good consistency,strong anti-interference ablity,good controllability and so on.It is the development direction of high energy density,high reliability and intelligent power supply in the future.Taking XX28512 DC-DC converter as an example,a digital DC-DC converter with three independent closed-loop control,precise voltage regulation and adjustable outputs by adopting push-pull topology and synchronous Buck(Buck/Boost)circuit structure was designed.Through the test verification,the design expection was achieved.