DocID026803 Rev 1

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AN4569

Layout

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4.2

Snubber



Solder the snubber network as close as possible to the related IC pin;

Figure 24. Snubber network



Snubber filter for high-frequency spike on the PWM;

Figure 25. Snubber filter for spikes

As shown in the figure below, there are two different examples given (single-ended and

differential snubber networks).

Figure 26. Differential and single-ended layout for snubber network

A strong spike could happen if there is a long distance between the snubber network and

the pins, the IC could even be burnt by the big spike. It's recommended that the distance

between snubber network be within 3 mm, which takes into consideration the width of the

copper wire.