BEHAVIORAL MODELS
VI BRICK Bus Converter Level 1 DC Behavioral Model for 48 V to 1.5 V, 135 W
ROUT
IOUT
+
0.9 mΩ
+
1/32 • Iout
1/32 • Vin
•
V I
+
–
+
–
VOUT
VIN
I
113 mA
K
–
–
©
Figure 16 — This model characterizes the DC operation of the VI BRICK bus converter, including the converter transfer function and its losses. The model
enables estimates or simulations of output voltage as a function of input voltage and output load, as well as total converter power dissipation or heat gen-
eration.
VI BRICK Bus Converter Level 2 Transient Behavioral Model for 48 V to 1.5 V, 135 W
0.15 nH
Lout = 1.61 nH
ROUT
IOUT
IN
L
= 5 nH
0.9 mΩ
+
+
RCOUT
RCIN
0.6 mΩ
1/32 • Vin
•
V I
0.065 mΩ
1.3 mΩ
1/32 • Iout
+
–
4.0 µF
+
–
306 µF
CIN
COUT
VOUT
VIN
IQ
113 mA
K
–
–
©
Figure 17 — This model characterizes the AC operation of the VI BRICK bus converter including response to output load or input voltage transients or
steady state modulations. The model enables estimates or simulations of input and output voltages under transient conditions, including response to a
stepped load with or without external filtering elements.
Bus Converter Module
BC048A015T014FP
vicorpower.com
Rev. 1.0
Page 9 of 11
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