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CN101027829B 电流式受控DC-DC转换器 有权 转让

电流式受控DC-DC转换器
摘要：
电流式受控DC-DC转换器，接收输入电压(Vb)并提供输出电压(Vo)。可控开关(S1)与电感器(L)相连，用于获得经过电感器(L)的周期性变化的电感器电流(IL)。电流式控制器(1)对Vo与参考电压(Vr)进行比较以获得误差信号(ER)，并把转移函数应用于ER以获得控制信号(CO；ICO)。校正电路(7)把(CO；ICO)与校正信号(ICR)相加以获得修改后的控制信号(MCO；IMC)，其中ICR代表(CO；ICO)的初始电平与电感器电流(IL)的平均值之间的差。驱动电路(3、4)把代表电感器电流(IL)的检测到的信号(SE)与(MCO；ICO)进行比较(3)，从而当SE的电平到达(MCO；ICO)的电平时切断(4)可控开关(S1)。
摘要（英）：

A current-mode controlled DC/DC converter receives an input voltage (Vb) and supplies an output voltage (Vo). A controllable switch (S1) is coupled to an inductor (L) to obtain a periodically varying inductor current (IL) through the inductor (L). A current-mode controller (1) compares (10) the output voltage (Vo) with a reference voltage (Ver) to Obtain an error signal (ER), and applies (11) a transfer function on the error signal (ER) to obtain a control signal (CO; CIO). A correction circuit (7) adds to the control signal (CO; ICO) a correction signal (ICR) representative for a difference between an original value of the control signal (CO; ICO) and an average value of the inductor current (IL) to obtain a modified control signal (MCO; IMC). A drive circuit (3, 4) compares (3) a sensed signal (SE) being representative for the inductor current (IL) with the modified control signal (MCO; ICO) to switch off (4) the controllable switch (S1) when a level of the sensed signal (SE) reaches a level of the modified control signal (MCO; ICO).

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