一种高频数字DC-DC开关电源控制器的设计  

Design of Controller of High Frequency Digital DC-DC Switching Power Supply

作　　者：许晓航[1] 孔明[1] 李文宏[1] 

机构地区：[1]复旦大学专用集成电路与系统国家重点实验室,上海201203

出　　处：《复旦学报（自然科学版）》2008年第1期40-44,49,共6页Journal of Fudan University：Natural Science

基　　金：国家自然科学基金资助项目(60676013);上海市科委SDC资助项目(047062003)

摘　　要：用新的思路设计了一个数字比例积分微分（proportional-integral-differential,PID）控制器.通过在传统数字PID算法上增加一个迭代回路,加快了瞬态响应速度.将该控制器应用于一个降压型开关电源系统中,经实验证明,当负载电流从2-10 A大范围变化时,输出电压的稳定时间从480μs缩短为150μs,下冲从40 mV减少为20 mV.功率管的开关频率为1 MHz.A new design for digital Proportional-Integral-Differential （PID） controller is proposed. One iterative loop is added to the traditional digital PID arithmetic resulting in increase of transient response speed. This controller is applied in a buck switching power supply system. Experiment result shows that when output load current varies from 2 to 10 A, the stabilization time of output voltage decreases from 480 to 150μs and the undershoot voltage spikes also decrease from 40 to 20 mV. Switching frequency of the power transistors is 1 MHz.

关 键 词：开关电源 直流—直流 数字控制 比例积分微分 

分 类 号：TN86[电子电信—信息与通信工程] TN710