Page 14 - PEN eBook July 2023

Cover Story — Design

▶ Enable feature: This sets the
converter to start switching
when the threshold is reached.

▶ Power Good feature:
Once V is above a certain
OUT
threshold—e.g., 90%—the PG
pin transitions to a high state.

Figure 7 shows the power module
1 switched on by the EN pin, which
is connected to V . As soon as
IN
the output voltage V of module
OUT1
1 has reached 90%, the PG pin
transitions to a high state. If the
PG pin of module 1 is connected
Figure 7: Simplified typical circuit diagram of the 1710X3801 series to the EN pin of module 2, the PG
connected for sequenced operation signal will enable module 2. This
leads then to a sequential increase
in the output voltage from module

2.

Another positive effect of sequentially starting the modules is that the input peak current supplied
by the upstream supply is also controlled. If the modules would start up simultaneously, then their
input currents would be combined, potentially exceeding the limit of the upstream source.

ONE SIZE FITS ALL
“One size fits all” means one power module solution that fulfills the needs of many applications. The
VDLM 1710X3801 supports this strategy in two ways. First, the pure performance data covers many

applications, from the low-power range to the mid-power range, whether it is a PoL application or
a 24-V DC bus application.

▶ V = 3.5 to 38 V
IN
▶ I = up to 3 A
OUT
▶ V = 0.85 to 13 V
OUT
▶ LGA-12EP package

Second, the use of an integrated power module that can be easily inserted into an application as
a ready-made solution provides a remedy here. The power module comes fully tested in all areas
that are essential for a DC/DC converter.

14 JULY 2023 | www.powerelectronicsnews.com