ISOLATED DC/DC CONVERTERS
48 Vdc Input 12 Vdc/20 A Output
Input Specifications
Parameter
Min
Typ
Max
Notes
Input Voltage
36 V
48 V
75 V
Input Current (full load)
Input Current (no load)
Remote Off Input Current
-
-
-
7.5 A
180 mA
10 mA
120 mA
5 mA
Input Reflected Ripple Current
(pk-pk)
Tested with simulated source impedance
of 10 uH, 5 Hz to 20 MHz; use a 100
uF/100 V electrolytic capacitor with
ESR = 1 ohm max. at 200 kHz at 25 °C.
-
-
20 mA
40 mA
Input Reflected Ripple Current
(rms)
5 mA
10 mA
I2t Inrush Current Transient
Turn-on Voltage Threshold
Turn-off Voltage Threshold
Input Over Voltage Lockout
-
0.05 A2s
34 V
0.1 A2s
35 V
32 V
30 V
76 V
32 V
34 V
78 V
80 V
Notes: 1. Should place at least 100uF/100V electrolytic capacitor directly adjacent to the input pin of the module.
2. All specifications are typical at nominal input, full load at 25 °C unless noted.
Output Specifications
Parameter
Min
Typ
Max
Notes
Vin=48 V, Io=50% full load, Ta=25 °C.
Short +sense to +output, and -sense to -
output.
Output Voltage Set Point
11.760 V
12.000 V
12.240 V
Line Regulation
Load Regulation
-
-
±12 mV
±30 mV
±24 mV
±60 mV
Regulation Over Temperature
(-40 °C to +85 °C)
-
±60 mV
±100 mV
Output Current
0 A
21 A
-
-
20 A
30 A
5 A2s
Current Limit Threshold
Short Circuit Surge Transient
25 A
3 A2s
Hiccup Mode
Ripple and Noise (rms)
Ripple and Noise (pk-pk)
-
-
30 mV
50 mV
0-20 MHz BW, with a 1 uF ceramic
capacitor and a 10 uF Tantalum capacitor
at the output, at all temperature.
100 mV
150 mV
Turn on Time
10 mS
-
-
0%
-
30 mS
5%
Overshoot at Turn on
Output Capacitance
Transient Response
0 uF
2200 uF
Overshoot
-
-
-
-
600 mV
800 mV
50% ~ 75%
Max Load
Test conditions: di/dt = 0.1
A/uS, Vin=48 V, Ta=25 °C with
a 1 uF ceramic capacitor and a
10 uF Tantalum capacitor at
the output.
Settling Time
300 uS
600 mV
300 uS
500 uS
800 mV
500 uS
VO=12.0 V
Overshoot
75% ~ 50%
Max Load
Settling Time
Note: All specifications are typical at nominal input, full load at 25 °C unless noted.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
