英語 での The switching frequency の使用例とその 日本語 への翻訳
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Because this action further modulates the switching frequency, skip or power-save mode is sometimes referred to as a form of PFM mode.
The switching frequency can be driven at up to 5MHz, so it can be used for testing of high frequency applications such as wireless power supply.
As an example, Channel A of the same unit does not exhibit any noise spikes at the switching frequency of 800 kHz.
When the load is constant and stabilized, general PWM control is executed, and the switching frequency is fixed at 400 kHz Typ.
Figure 63 shows the relationship between general evaluation items and the switching frequency.
Considering that IGBTs have slower turn-off characteristics than MOSFETs, the switching frequency is limited to a few tens of kilohertz.
Knowing and controlling the switching frequency can help optimize inductor selection, give guidelines for transistor selection, and dictate PCB layout considerations.
Generally, in terms of minimizing power losses and ensuring control, it is easier to increase the switching frequency with the synchronous rectifying type; synchronous rectifying type devices capable of MHz switching operations are not rare.
Under light loading, operation is in discontinuous current mode(DCM), the switching frequency is changed according to the load, so that high efficiency is maintained even for light loads refer to the previously presented frequency graph.
From this equation we see that in order to reduce the output ripple voltage, we should lower the ESR, increase the capacitance of the output capacitor, raise the switching frequency and reduce IL to the minimum necessary level.
In these conditional settings, it is assumed that the switching frequency is not changed, but there is also an approach in which the switching frequency is lowered to reduce losses.
Furthermore, the MAX9759 oscillator can be synchronized to an external clock through the SYNC input, allowing the switching frequency to range from 1000kHz to 1600kHz.
However, in equipment for automotive applications, switching frequencies of 2 MHz and above are basically required, and so the option of lowering the switching frequency is not available.