V048K015T80 Datasheet, PDF (13/20 Pages) Vicor Corporation – VI Chip - VTM Voltage Transformation Module

Application Note (continued)
V•I Chip VTM LEVEL 1 DC BEHAVIORAL MODEL for 48V to 1.5V, 80A
IOUT
ROUT
+
1.2 mΩ
+
1_{/32 • Iout}
V•I
1_{/32 • Vin}
++
VIN
IQ
52 mA
––
K
-
VOUT
–
©
Figure 27—This model characterizes the DC operation of the V•I Chip VTM, 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 generation.
V•I Chip VTM LEVEL 2 TRANSIENT BEHAVIORAL MODEL for 48V to 1.5V, 80A
L IN = 20 nH
IOUT
0.4 nH
ROUT
LOUT = 1.6 nH
+
1.2 mΩ
+
RC_IN
4.0 mΩ
1_{/32 • Iout}
V•I
0.9 mΩ
1_{/32 • Vin}
RC_OUT
70 µΩ
CIN
1 µF
++
COUT
300 µF
VIN
IQ
VOUT
52 mA
––
K
–
–
©
Figure 28—This model characterizes the AC operation of the V•I Chip VTM 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.
45 ^{Vicor Corporation Tel: [phone] vicorpower.com}
V•I Chip Voltage Transformation Module Rev. 1.6
Page 13 of 20