A hybrid digital control method for synchronous buck converters using multisampled linear PID and V2 constant on-time controllers
A hybrid digital control method for synchronous buck converters using multisampled linear PID and V2 constant on-time controllers
复制标题
使用多重采样线性 PID 和 V2 恒定导通时间控制器的同步降压转换器的混合数字控制方法
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发表时间：
2017
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通讯作者：
M. Martins
中科院分区：
文献类型：
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作者：
Renan B. Vasconselos;M. Martins
提出了一种负载点同步降压变换器的混合数字控制方法。使用两种不同的控制器，寻求加入良好的特性，同时消除不同负载条件下的缺点。对于轻负载，使用恒定导通时间（COT）脉冲频率调制（PFM）控制器，以减少功率损耗。对于高负载，线性脉宽调制（PWM）PID控制器，由于其更好的稳定性，与改善的瞬态响应，实现多阶跃应用。本研究针对一个最大负载电流为5A的3.3V至1.2V的降压型功率转换器进行，控制器以数位讯号处理器DSP装置来实现。仿真和实验结果表明了该控制方法的可行性。
This paper presents a hybrid digital control method for a point-of-load (POL) synchronous buck converter. Two different controllers are used, seeking out to join good characteristics while eliminating drawbacks under different load conditions. For light loads, a constant on-time (COT) pulse frequency modulation (PFM) controller is used, in order to reduce power losses. For high loads, a linear pulse width modulation (PWM) PID controller is applied due to its better stability, with improved transitory response achieved by multisampling. The study was carried out for a step-down power converter from 3.3V to 1.2V with a maximum load current of 5A and the controller implemented in a Digital Signal Processor, DSP device. The feasibility of the proposed control method is shown with simulation and experimental results.