28 Vout, 190 W OPERATING SPECIFICATIONS - (e.g. DC048B280T019FP
)
Parameter
Min
Typ
Max
Unit
Notes
Efficiency
89
92
%
mV
Nominal input; full load; 25°C
Ripple and noise
Output OVP setpoint
Dissipation, standby
Load regulation
130
163
39.6
7.6
p-p; Nominal input; full load; 20 MHz bandwith
25°C; recycle input voltage to restart (1 minute off)
No load
37.33
Volts
Watts
%
5.5
0.6
1.5
No load to full load; nominal input, deviation from setpoint
External
Output capacitance
Load current
106
6.79
8.83
3.40
µF
0
7.33
0
Amps
Amps
Amps
Current limit (peak)
Short circuit current (avg)
7.81
10
Shut down, may require PC enable to initiate restart
Shut down, may require PC enable to initiate restart
Efficiency vs. Output Current
95
90
85
80
75
70
65
Vin
36 V
48 V
75 V
0
0.67 1.34 2.01 2.68 3.35 4.02 4.69 5.36 6.03 6.7
Output Current (A)
Figure 13-1 – Efficiency vs. load
Figure 13-4 – Transient response 100 – 50%, 3 x 4.7 µF ceramic bypass
capacitance
Power Dissipation vs. Output Current
20
18
16
14
12
10
8
Vin
36 V
48 V
75 V
6
4
0
0.67 1.34 2.01 2.68 3.35 4.02 4.69 5.36 6.03 6.7
Output Current (A)
Figure 13-2 – Power dissipation vs. load
Figure 13-5 – Transient response 50 – 100%, 3 x 4.7 µF ceramic bypass
capacitance
Ripple vs. Output Current
120
100
80
60
40
20
0
Vin
NL
0
2
4
6
8
Output Current (A)
Figure 13-3 – Output ripple vs. load with no external bypass capacitance
Figure 13-6 – Output voltage ripple at nominal line and full load with no
external bypass capacitance.
VI Brick / 48V Input DC-DC Converter Modules
vicorpower.com
Rev. 1.0
Page 16 of 21
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