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高速低功耗buck变换器设计 被引量:5

Design of high speed low power buck converter
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摘要 对Buck变换器主电路在CCM工作模式下进行动态小信号分析,推导状态方程得出小信号模型,并设计PID闭环控制补偿网络保证环路稳定。采用输出电压给控制环路供电的低功耗结构,以及采用加大系统环路带宽的方案来优化输出电压的过冲,实现了输出电压的高速动态调节和控制电路低功耗的设计目标。仿真结果表明,系统带宽达到1.136 MHz,相位裕度为47.49°,并且在600 mA负载电流突变下,电压过冲小于7 mV,响应时间小于4μs,并且功耗降低了一半。
出处 《电子产品世界》 2018年第4期48-51,60,共5页 Electronic Engineering & Product World
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