12. Tunable Switching Frequency
The switching frequency of the oscillator is selected by choosing an external resistor (R
FREQ
) connected between the RFREQ and
VPOS pins. The following figure will aid in choosing the R
FREQ
value to achieve the desired switching frequency.
Figure 12.1. Switching Frequency vs R
FREQ
The selected switching frequency for this application is 220 kHz, which is achieved by setting the RFREQ resistor to 88.7 kΩ.
UG332: Class 3 Non-Isolated Evaluation Board for the Si3406
Tunable Switching Frequency
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