
Rev.09.10.07
eighth-brick series
22 of 31
TechnicalReferenceNote-EIGHTH-BRICKSERIES
Single Output Performance Products
Figure 26: Typical Transient Response 75-50%
Step Load Change (1 A/s), Top (Vout), Bottom (Iout)
25
35
45
55
65
75
85
0
10
20
30
40
50
O
U
T
P
U
T
C
U
R
E
N
T
(
A
)
AMBIENT TEMPERA TURE (C)
0.5 m/s (100 LFM)
1 m/s (200 LFM)
1.5 m/s (300 LFM)
2 m/s (400 LFM)
35
43
51
59
67
75
82
84
86
88
90
92
E
F
I
C
I
E
N
C
Y
(
%)
INPUT VOLTAGE (V)
Figure 21: Derating Curve with Forced Air
Figure 22: Efficiency vs. Line
Figure 23: Efficiency vs. Load
0
10
20
30
40
60
70
80
90
100
E
F
I
C
I
E
N
C
Y
(
%
)
OUTPUT CURRENT (A)
36 Vin
48 Vin
75 Vin
LES40A48-1V8J Model
Figure 24: Turn-On Characteristic,
Top (Vout), Bottom (Vin)
Figure 25: Control On/Off Characteristic,
Top (Vout), Bottom (Remote ON/OFF)