Output Specifications (continued)
ISOLATED DC/DC CONVERTERS
48 Vdc Input 1.2 Vdc - 12 Vdc / 8.33 A - 30 A Output, 1/8 Brick
Converter
Parameter
Min
Typ
Max
Notes
Transient Response
25% ~ 50%
Overshoot
-
150 mV
200 mV
Max Load
50% ~ 25%
Max Load
25% ~ 50%
Settling Time
Overshoot
Settling Time
Overshoot
V O =2.5 V
-
-
-
-
150 uS
150 mV
150 uS
140 mV
200 uS
200 mV
200 uS
170 mV
Max Load
50% ~ 25%
Max Load
25% ~ 50%
Max Load
50% ~ 25%
Max Load
25% ~ 50%
Max Load
50% ~ 25%
Max Load
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
V O =1.8 V
V O =1.5 V
V O =1.2 V
-
-
-
-
-
-
-
-
-
-
-
150 uS
140 mV
150 uS
130 mV
150 uS
130 mV
150 uS
120 mV
150 uS
120 mV
150 uS
200 uS
170 mV
200 uS
150 mV
200 uS
150 mV
200 uS
140 mV
200 uS
140 mV
200 uS
Test conditions: di/dt =
0.1 A/uS, Vin=48 V, with
a 1 uF ceramic capacitor
and a 10 uF Tantalum
capacitor at the output.
Note: All specifications are typical at 25 ? C unless otherwise stated.
General Specifications
Parameter
Min
Typ
Max
Notes
Efficiency
V O =12.0 V
V O =5.0 V
88%
88%
91%
91%
-
-
V O =3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Switching Frequency
Isolation capacitance
Output Voltage Trim Range
V O =1.5 V-12 V
V O =1.2 V
Remote Sense
Over Temperature Protection
Over Voltage Protection
87%
86%
85%
83%
81%
270 kHz
-
80% Vo
90% Vo
-
-
-
90%
89%
88%
86%
84%
300 kHz
1500 pF
-
-
-
125 ? C
130% Vo
-
-
-
-
-
330 kHz
-
110% Vo
110% Vo
10%
-
-
Vin=48V, Io=Io, max
The total voltage increased by trim and
remote sense should not exceed
10%Vo.
Vin=48V, full load, in hiccup mode.
Pre-bias Voltage
V O =5.0 V
V O =3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
-
-
-
-
-
-
-
-
-
-
-
-
4.0 V
1.4 V
2.0 V
1.4 V
1.2 V
0.9 V
Calculated Per Bell Core SR-332
MTBF
Dimensions
Inches (L × W × H)
Millimeters (L × W × H)
1,583,176 hours
2.30 x 0.896 x 0.395
58.42 x 22.76 x 10.03
(Vin=48 V, Vo=3.3 V, Io=20 A, T a = 25
? C)
Weight
-
27 g
-
Note : All specifications are typical at 25 ? C unless otherwise stated.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 ? Tel 201-432-0463 ? Fax 201-432-9542 ? www.belfuse.com
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