VTM 48 E x 120 y 025A00
5.0 APPLICATION CHARACTERISTICS
The following values, typical of an application environment, are collected at T C = 25oC unless otherwise noted. See associated figures
for general trend data.
ATTRIBUTE
No load power dissipation
Efficiency (ambient)
Efficiency (hot)
Output resistance (cold)
Output resistance (ambient)
Output resistance (hot)
Output voltage ripple
V OUT transient (positive)
V OUT transient (negative)
SYMBOL
P NL
η AMB
η HOT
R OUT _ COLD
R OUT _ AMB
R OUT _ HOT
V OUT _ PP
V OUT _ TRAN +
V OUT _ TRAN -
CONDITIONS / NOTES
V IN = 48 V, PC enabled
V IN = 48 V, I OUT = 25 A
V IN = 48 V, I OUT = 25 A, T C = 100oC
V IN = 48 V, I OUT = 25 A, T C = -40oC
V IN = 48 V, I OUT = 25 A
V IN = 48 V, I OUT = 25 A, T C = 100oC
C OUT = 0 F, I OUT = 25 A, V IN = 48 V,
20 MHz BW, Section 12
I OUT _ STEP = 0 A TO 25A, V IN = 48 V,
I SLEW = 23 A /us
I OUT _ STEP = 25 A to 0 A, V IN = 48 V
I SLEW = 91 A /us
TYP
5.1
96.0
95.6
7.4
9.4
11.7
198
650
310
UNIT
W
%
%
m Ω
m Ω
m Ω
mV
mV
mV
11
9
7
5
3
1
No Load Power Dissipation vs. Line
Full Load Efficiency vs. Case Temperature
100
98
96
94
92
90
26
29
32
35
38
41
43
46
49
52
55
-40
-20
0
20
40
60
80
100
Input Voltage (V)
Case Temperature (°C)
T CASE :
-40°C
25°C
100°C
V IN :
26 V
48 V
55 V
Figure 1 – No load power dissipation vs. V IN
Efficiency & Power Dissipation -40°C Case
Figure 2 – Full load efficiency vs. temperature
Efficiency & Power Dissipation 25°C Case
100
96
50
45
100
96
32
28
92
88
84
80
76
72
68
64
60
η
P D
40
35
30
25
20
15
10
5
0
92
88
84
80
76
72
68
η
P D
24
20
16
12
8
4
0
0.0
2.5
5.0
7.5
10.0 12.5 15.0 17.5 20.0 22.5 25.0
0.0
2.5
5.0
7.5
10.0 12.5 15.0 17.5 20.0 22.5 25.0
Load Current (A)
Load Current (A)
V IN :
26 V
48 V
55 V
26 V
48 V
55 V
V IN :
26 V
48 V
55 V
26 V
48 V
55 V
Figure 3 – Efficiency and power dissipation at –40°C
Figure 4 – Efficiency and power dissipation at 25°C
Rev. 3.1
V?I CHIP CORP. (A VICOR COMPANY) 25 FRONTAGE RD. ANDOVER, MA 01810 800-735-6200
2/2011
Page 5 of 18
v i c o r p o w e r. c o m
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