ISOLATED DC/DC CONVERTERS
18 Vdc - 75 Vdc Input 3.3 Vdc /15 A Output
Input Specifications (continued)
Parameter
Min
Typ
Max
Notes
I2t Inrush Current Transient
-
0.05 A2s
0.1 A2s
Turn-on Voltage Threshold
Turn-off Voltage Threshold
Input Over Voltage Lockout
16.5 V
15.5 V
76 V
17.0 V
16.0 V
78 V
17.5 V
16.5 V
80 V
Output Specifications
Parameter
Min
Typ
Max
Notes
Output Voltage Set Point
Load Regulation
3.25 V
3.30 V
3.35 V
Vin=48 V, Io=50% load
-
-
±1 mV
±3.3 mV
±6.6 mV
±6.6 mV
Line Regulation
Regulation Over Temperature
(-40deg.C ~ +85deg.C)
-
±10 mV
±30 mV
Ripple and Noise (rms)
-
10 mV
20 mV
0-20 MHz BW, with a 0.1 µF ceramic cap
and a 10 uF tantalum cap at the output.
Ripple and Noise (pk-pk)
Output Current Range
Output DC Current Limit
-
40 mV
80 mV
15 A
0 A
-
-
16.5 A
25 A
Vin=48 V, in Hiccup Mode.
Short Circuit Surge Transient
-
3 A2s
5 A2s
Turn on Time
5 mS
-
12 mS
20 mS
3%
Overshoot at Turn on
Output Capacitance
Transient Response
0%
-
0 uF
4800 uF
Overshoot
Settling Time
Overshoot
-
-
-
-
100 mV
150 uS
100 mV
150 uS
150 mV
300 uS
150 mV
300 uS
75% ~ 50%
Max Load
di/dt=0.1 A/us, Vin=24 Vdc, Ta=25 °C,
with a 0.1 µF ceramic cap and a 10 uF
tantalum cap at output.
50% ~ 75%
Max Load
Settling Time
Note: All specifications are typical at 25 °C unless otherwise stated.
General Specifications
Parameter
Min
Typ
Max
Notes
Efficiency
Vin=24 V
Vin=48 V
88.5%
89%
90%
90.3%
-
-
Measured at normal Vin, full load.
Switching Frequency
Isolation capacitance
240 kHz
-
260 kHz
1500 pF
280 kHz
-
Remote Sense Compensation
Output Voltage Trim Range
-
-
-
10%
The total voltage increased by trim and
remote sense should not exceed 15%Vo.
90%
110%
Over Temperature Protection
Over Voltage Protection
-
-
-
-
125 °C
4.1 V
Vin=48 V, full load, in Hiccup mode.
Calculated Per Bell Core SR-332
(Io=80%load, Ta = 25 °C)
MTBF
TBD
Dimensions
Inches (L × W × H)
Millimeters (L × W × H)
2.30 x 0.896 x 0.49
58.42 x 22.76 x 12.47
Weight
-
40 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