ISOLATED DC/DC CONVERTERS
48 Vdc Input,
12 Vdc/8.35 A Output
Input Specifications
Parameter
Min
Typ
Max
Notes
Input Voltage
18 V
48 V
75 V
Input Current (full load)
Input Current (no load)
Remote Off Input Current
-
-
-
7.0 A
180 mA
15 mA
100 mA
10 mA
Tested with simulated source
impedance of 10 uH, 5 Hz to 20
MHz BW; use a 0.47 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 (pk-pk)
-
20 mA
40 mA
Input Reflected Ripple Current (rms)
I2t Inrush Current Transient
-
-
5 mA
10 mA
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
Note: All specifications are typical at nominal input, full load at 25 °C unless noted.
Output Specifications
Parameter
Min
Typ
Max
Notes
Output Voltage Set Point
11.820 V
12.00 V
12.180 V
Vin=48 V, Io=50% full load
Line Regulation
Load Regulation
±24 mV
±30 mV
±120 mV
±80 mV
-
-
Regulation Over Temperature
(-40 °C to +85 °C)
±60 mV
±100 mV
Output Current Range
0 A
9.2 A
-
-
8.35 A
13 A
5 A2s
Current Limit Threshold
Short Circuit Surge Transient
10.5 A
3 A2s
Vin=48 V ; Ripple and Noise (rms)
-
30 mV
Test conditions:
50 mV
40 mV
0-20 MHz BW, with a 1 uF
ceramic capacitor and a 10 uF
Tantalum capacitor at the
output.
Vin=24 V ; Ripple and Noise (rms)
Vin=48 V ; Ripple and Noise (pk-pk)
Vin=24 V ; Ripple and Noise (pk-pk)
Turn on Time
-
25 mV
-
100 mV
150 mV
120 mV
100 mS
5%
-
10 mS
-
75 mV
-
0%
-
Overshoot at Turn on
Output Capacitance
0 uF
1200 uF
Transient Response
Overshoot
-
-
-
-
360 mV
480 mV
250 uS
di/dt = 0.1 A/uS, Vin=48
V, with a 1 uF ceramic
capacitor and a 10 uF
Tantalum capacitor at the
output.
50% ~ 75%
Max Load
Settling Time
Overshoot
100 uS
360 mV
150 uS
VO=12.0 V
480mV
250 uS
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
