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
The following figures provide typical characteristics for the EQW025A0P1 (1.2V, 25A) at 25ºC. The figures are
identical for either positive or negative Remote On/Off logic.
86
27
24
OUTPUT CURRENT, Io (A)
84
82
21
18
15
12
9
6
3
0
EFFICIENCY (%)
80
78
76
74
72
NC
1 LFM
00
200 LFM
300 LFM
400 LFM
20
30
40
50
60
70
O
Vin=75V
Vin=48V
Vin=36V
70
0
5
1
0
1
5
20
25
80
90
OUTPUT CURRENT, I
o
(A)
AMBIENT TEMPERATURE, T
A
C
Figure 1. Typical Converter Efficiency Vs. Output
current at Room Temperature.
Figure 4. . 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 2. Typical Output Ripple and Noise (Vin
=48Vdc, Io = 25A).
OUTPUT VOLTAGE
V
O
(V) (100mV/div)
Figure 5. Typical Start-Up with application of Vin (Vin =
48Vdc, Io = 25A).
O
UTPUT VOLTAGE
TIME, t (100μs/div)
ON/OFF VOLTAGE
OUTPUT CURRENT
I
O,
(A) (10A/div)
V
On/off
(V) (5V/div)
V
O
(V) (1V/div)
TIME, t (5ms/div)
Figure 3. Typical Transient Response to Dynamic
Load change Load from 50% to 75% to 50% of Full
load at 48 Vdc Input.
Figure 6. Typical Start-Up Using Remote On/Off,
negative logic version shown (Vin = 48Vdc, Io = 25A).
LINEAGE
POWER
6
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
