Figure 2. Inductor current waveformRipple current of inductor is defined asObviously, load current can be expressed asA ripple factor can be defined asWhen ripple factor is less than 2, the converter operates in continuous conduction mode (C.C.M), otherwise discontinuous conduction mode (D.C....
When designing a buck converter, many application notes recommend that we are supposed to choose a suitable inductance to make the inductor ripple current as 20% to 40% of the Iout. Just want to make sure what the number comes from, is it derived b...
Buck转换器的电流纹波系数 Application Note 王信雄 AN009 – Jul 2014 AN009 © 2014 Richtek Technology Corporation 1 1. 介绍 (2)2. 纹波系数 (3)3. 电感的面积积 (4)4. 一个设计示例 (6)5. 总结 (7)
A quick dynamic response of ripple-based constant frequency on-time control circuit with virtual inductor current ripple for buck converter is showed in this chapter. The concept uses the capacitor and the resistor in a series to filter out the output voltage at load transient to dynamically ...
For the design of the buck converter, the current ripple in the inductor L and the output voltage ripple in the capacitor C are used as the design criterion. The inductance and capacitance values can be calculated following the expressions of the current and voltage ripples defining the values ...
Buck Converter
Most of the differential current in the output leads is caused by the converter inductor ripple current passing through the output capacitors, which also have some ESR. Adding an extra LC filter by means of bead and MLCC capacitor as shown in figure 30 will remove most of the differential ...
this buck converter might be perfectly appropriate. Let's start examining some of the imperfections and decisions involved in designing a buck converter. One of the most important is the selection of the inductor value. Even when the output is unloaded, there will be a “ripple current” always...
This example shows how to control the output voltage of a push-pull buck converter. The current flowing through the inductor is never zero. The DC-DC converter therefore operates in continuous conduction mode (CCM). To convert and maintain the nominal output voltage, the PI Controller subsystem...
This decrease in inductor current during TOFF is illustrated in Figure 3. The inductor current decrease during the OFF state is given by: V V I R O d L L I (–) T L L OFF This quantity, ∆ I (–), is also referred to as the inductor ripple current. L ...