ISOLATED DC/DC CONVERTERS
18 Vdc - 75 Vdc Input 12 Vdc /7 A Output
Input Specifications (continued)
Parameter
Min
Typ
Max
Notes
Tested with simulated source impedance
of 10 uH, 5 Hz to 20 MHz; use a 1 uF/100
V ceramic cap and a 100 uF/100 V
electrolytic cap with ESR = 1 ohm max. at
200 kHz at 25 C.
Input Reflected Ripple Current
(rms)
7 mA
10 mA
Input Reflected Ripple Current
(pk-pk)
-
15 mA
30 mA
I2t Inrush Current Transient
Turn-on Voltage Threshold
Turn-off Voltage Threshold
Input Over Voltage Lockout
-
0.05 A2s
17.0 V
16.0 V
78 V
0.1 A2s
17.5 V
16.5 V
80 V
16.0 V
15.0 V
76 V
CAUTION: This converter is not internally fused. An input line fuse must be used in application.
Recommend a fast-acting fuse with maximum rating of 8A on system board. Refer to the fuse
manufacture’s datasheet for further information.
Notes: 1. This converter has internal L-C (2.2uH-2*0.47uF+2.2uF) filter.
2. All specifications are typical at 25 C unless otherwise stated.
Output Specifications
Parameter
Min
Typ
Max
Notes
Output Voltage Set Point
11.76 V
12.00 V
12.24 V
Vin=48 V, Io=50% load
Load Regulation
line Regulation
-
-
±6 mV
±12 mV
±20 mV
±10 mV
Regulation Over Temperature
(-40deg.C ~ +85deg.C)
-
±30 mV
±50 mV
Ripple and Noise (rms)
Ripple and Noise (pk-pk)
Output Current Range
Output DC Current Limit
Short Circuit Surge Transient
Rise time
-
25 mV
100 mV
-
50 mV
150 mV
7 A
0-20 MHz BW, with a 0.1 µF ceramic cap
and a 10 uF tantalum cap at the output.
-
0 A
7.7 A
-
11 A
5 A2s
Vin=48 V, in Hiccup Mode.
-
3 A2s
10 mS
20 mS
20 mS
0%
5 mS
15 mS
25 mS
25 mS
3%
-
Ton(Enable form Vin)
Turn on Time
-
-
Ton(Enable form ON/OFF)
Overshoot at Turn on
Output Capacitance
Transient Response
0 uF
-
1000 uF
Overshoot
Settling Time
Overshoot
-
-
-
-
300 mV
400 uS
300 mV
400 uS
400 mV
600 uS
400 mV
600 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.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com
