Data Sheet
December 12, 2008
EQW012/020/023/025 Series, Eighth-Brick Power Modules:
36 - 75Vdc Input; 1.2Vdc to 5Vdc Output; 12A to 25A Output
Characteristic Curves
(continued)
The following figures provide typical characteristics for the EQW025A0Y (1.8V, 25A) at 25ºC. The figures are
identical for either positive or negative Remote On/Off logic.
90
88
86
27
OUTPUT CURRENT, Io (A)
24
21
18
15
12
9
6
3
0
20
30
40
50
60
70
O
EFFICIENCY (%)
84
82
80
78
76
74
72
0
5
1
0
15
20
25
NC
1 LFM
00
200 LFM
300 LFM
400 LFM
80
90
Vin=75V
Vin=48V
Vin=36V
OUTPUT CURRENT, I
o
(A)
AMBIENT TEMPERATURE, T
A
C
Figure 13. Typical Converter Efficiency Vs. Output
current at Room Temperature.
Figure 16. . Derating Output Current versus Local
Ambient Temperature and Airflow
O
UTPUT VOLTAGE
INPUT VOLTAGE
OUTPUT VOLTAGE
V
O
(V) (20mV/div)
V
On/off
(V) (20V/div)
V
O
(V) (1V/div)
TIME, t (1μs/div)
TIME, t (5ms/div)
Figure 14. Typical Output Ripple and Noise (Vin
=48Vdc, Io = 25A).
OUTPUT VOLTAGE
V
O
(V) (100mV/div)
Figure 17. Typical Start-Up with application of Vin (Vin
= 48Vdc, Io = 25A).
O
UTPUT VOLTAGE
OUTPUT CURRENT
I
O,
(A) (10A/div)
TIME, t (100μs/div)
ON/OFF VOLTAGE
V
On/off
(V) (5V/div)
V
O
(V) (1V/div)
TIME, t (5ms/div)
Figure 15. Typical Transient Response to Dynamic
Load change Load from 50% to 75% to 50% of Full
load at 48 Vdc Input.
Figure 18. Typical Start-Up Using Remote On/Off,
negative logic version shown (Vin = 48Vdc, Io = 25A).
LINEAGE
POWER
8
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
