PCB layout

AN3956

10/14

Doc ID 022034 Rev 1

2.2.3

Layout recommendations

The following figures illustrate layout recommendations.

(recommended distance to be within 3 mm) in order to avoid spikes generated by the stray

inductance caused by the copper supply lines.

Figure 10.

Solder the snubber networks as close as possible to the IC related pin.

A voltage spike dangerous for device operation could occur if the snubber network is far

from the output pins. It is recommended that the distance between the snubber network and

the output pins be within 5 mm.

Figure 11.

Snubber networks soldered as close as possible to relevant IC pin

GroundpinandVCC pin of

100nFcapacitorshouldbe

directly connectedto the

IC relatedpin

Snubbers