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Figure 2: Vishay's IHLP-7575GZ power inductor
(Source: Vishay)
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WSKW0612 Power
Metal Strip Resistors
IHLP-7575GZ-5A &
IHLP-7575GZ-51 Fixed
Inductors
Reference Design
For the reference design, we´ll be using a high density, scalable
Intermediate Bus Converter (IBC) 48Vin => 12Vout for datacenter
architecture from Infineon.
Driving 12V loads from a 48V IBC requires a solution with a tight output
voltage tolerance, as the power management IC (PMIC) is essentially a
smart load switch without voltage conversion (Figure 1).
Each of the maximum six phases can deliver up to 400W of output
power at 12V, for an average current of 33.3A per inductor at maximum
load. The total output power can reach 2.4kW.
AC-
DC
DC-
DC
12V-
Regulated
Grid
48V-
Bus
12V-Non
Regulated
DC-
DC
PMIC
12V Loads
POL
Figure 1: The topology for a 48V IBC with 12V regulated and
un-regulated converters. The 12V regulated output is intended for
12V loads with tight voltage requirements (Source: Vishay)
