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 EQW020A0F (3.3V, 20A) at 25ºC. The figures are identical
for either positive or negative Remote On/Off logic.
91
22
20
OUTPUT CURRENT, Io (A)
88
18
16
14
12
10
8
6
4
2
0
NC
100 LFM
200 LFM
300 LFM
400 LFM
20
30
40
50
60
70
O
EFFICIENCY (%)
85
82
79
76
73
70
0
4
8
12
16
20
Vin=75V
Vin=48V
Vin=36V
80
90
OUTPUT CURRENT, I
o
(A)
AMBIENT TEMPERATURE, T
A
C
Figure 25. Typical Converter Efficiency Vs. Output
current at Room Temperature.
Figure 28 . 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 26. Typical Output Ripple and Noise (Vin
=48Vdc, Io = 20A).
OUTPUT VOLTAGE
V
O
(V) (100mV/div)
Figure 29. Typical Start-Up with application of Vin (Vin
= 48Vdc, Io = 20A).
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 27. Typical Transient Response to Dynamic
Load change Load from 50% to 75% to 50% of Full
load at 48 Vdc Input.
Figure 30. Typical Start-Up Using Remote On/Off,
negative logic version shown (Vin = 48Vdc, Io = 20A).
LINEAGE
POWER
10
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
