对于BUCK推演的拓扑架构,电感位于输出端,因此控制对象与应用关注的对象一致。 对于Boost或者BUCK-BOOST架构的变化器电感并不位于输出端,因此控制的对象与实际应用关注的对象并不相同。 对于PFC的应用,需要控制的电流恰好是输入电流,因此BOOST拓扑的变换器更为适合。 平均电流控制(ACMC)简介 与PCMC的控制不同的是,ACMC...
平均电流模式控制(ACMC)是开关电源设计中一种常用的控制方式,它通过调整电感平均电流的方式实现电路的恒定输出。相对于峰值电流模式控制,它保留了动态响应快的特点,同时也解决了容易受干扰的问题。 本系列分为两个部分。 第一部分从平均电流模式的基本原理出发,通过控
FerŃandez, “Average-current-mode control of two-input buck post-regulators used in power-factor correctors,” IEEE Trans. on Industrial Electronics, Vol. 6, pp. 569-576, 1999. :J. Sebastian,P. J. Villegas,M. Hernando,F. Nuno,F. F-Linera(1999).Average-current-mode control of two-...
The current average current-mode control methods suffer from switching instability at low duty ratios due to a large ripple in the sensed current. Moreover, the current error amplifier's high-frequency pole located at the switching frequency neither alleviates the stability issue nor improves the ...
Dynamics and stability of average current-mode control of buck converters areanalyzed by sampled-data and harmonic balance analyses. An exact sampled-datamodel is derived. A new continuous-time model "lifted" from the sampled-datamodel is also derived, and has frequency response matched with ...
MagnaChip Semiconductor... MAP3512 1Mb / 15P 2-CH Average Current Control Buck Controller for LED Backlight MAP3512SIRH 1Mb / 15P 2-CH Average Current Control Buck Controller for LED Backlight More results 类似说明 - MAP3511SIRH 制造商 部件名 数据表 功能描述 MagnaChip Semiconductor... ...
Average-input current-mode control (AICMC) is a new control scheme for shaping the input current of a buck converter in a high-power-factor rectifier. AICMC is presented along with a continuous-time model that includes sampled-data effects. AICMC is found to be analogous to current mode co...
Conventional peak current mode control actually controls inductor current. As normally used for output current control, it is most effective when applied to a buck regulator where the inductor is in the output. But for flyback or boost topologies the inductor is not in the output, the wrong ...
Detailed analysis is given for the buck converter topology with the boost and buck-boost results also provided. The modulator gain, for a first order approximation, is shown to be constant as in voltage mode control. Guidelines are presented to optimize the design of the current loop and ...
design, analysis, and simulation of average current-mode control of power converter topologies, such...