V048K015T090 Datasheet, PDF (11/16 Pages) Vicor Corporation – VI Chip - VTM Voltage Transformation Module

Application Note (continued)
PRELIMINARY
Figure 18—Thermal resistance
10
9
8
7
6
5
4
3
0
VTM with optional 0.25'' Pin Fins
100
200
300
400
500
600
Airflow (LFM)
Figure 19—Junction-to-ambient thermal resistance of VTM
with 0.25" Pin Fins. (Pin Fins are available as a seperate item.)
V•I Chip VTM LEVEL 1 DC BEHAVIORAL MODEL for 48V to 1.5V, 90A
IOUT
ROUT
+
1.0 mΩ
+
1/32 • Iout
V•I
++
1/32 • Vin
VIN
IQ
52 mA
––
K
-
VOUT
–
©
Figure 20—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, 90A
LIN = 20 nH
IOUT
0.15 nH
ROUT
LOUT = 1.6 nH
+
1.0 mΩ
+
RC_IN
1.3 mΩ
1/32 • Iout
V•I
0.6 mΩ
1/32 • Vin
RC_OUT
65 µΩ
CIN
4 µF
VIN
IQ
52 mA
++
––
COUT
306 µF
VOUT
K
–
–
©
Figure 21—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.
Vicor Corporation
Tel: [phone]
vicorpower.com
V•I Chip Voltage Transformation Module V048K015T090 Rev. 1.0 Page 11 of 16