ALTAIR04-900

Application information

Doc ID 18211 Rev 2

21/29

5.10

Layout recommendations

A proper printed circuit board layout is essential for correct operation of any switch-mode

converter and this is true for the ALTAIR04-900 as well. Careful component placing, correct

traces routing, appropriate traces widths and compliance with isolation distances are the

major issues. In particular:

●

The compensation network should be connected as close as possible to the COMP

pin, maintaining the trace for the GND as short as possible

●

Signal Ground should be routed separately from power ground, as well from the sense

resistor trace.

Figure 19.

Suggested routing for converter

 

AC IN

OUT

GND

COMP

SOURCE

DRAIN

VDD

IREF

GND

FB/ZCD

ALTAIR04-900

AC IN