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ISOLATED DC/DC CONVERTERS  
48V Input 3.3V/60A, 5V/40A, 12V/17A Output  
07HB-D0T Series  
PRELIMINARY  
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Isolated  
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Output Over Voltage Shutdown  
High Efficiency  
OCP/SCP  
High Power Density  
Excellent Thermal Performance  
Low Cost  
Over Temperature Protection  
Remote On/Off  
Output Voltage Trim  
Positive/Negative Remote Sense  
Input Under Voltage Lockout  
Fixed frequency(315KHz)  
Description  
The 07HB-D0T Series are isolated DC/DC converters that operate from a nominal 48V source. These units  
provide up to 200W of output power from a nominal 48V input. These units are designed to be highly efficient  
and low cost. Features include remote on/off, over current protection and under voltage lockout. These  
converters are provided in an industry standard half-brick package.  
Part Selection  
Output  
Voltage  
12.0V  
5.0V  
Input  
Voltage  
48V  
48V  
48V  
Max. Output  
Current  
17A  
Max. Output  
Power  
Typical  
Efficiency  
93%  
Model Number  
Active High  
07HB-D0T120  
07HB-D0T050  
07HB-D0T033  
Model Number  
Active Low  
07HB-D0T12L  
07HB-D0T05L  
07HB-D0T03L  
200W  
200W  
200W  
40A  
60A  
93%  
92%  
3.3V  
Note: Add “G” suffix at the end of the model number to indicate Tray Packaging.  
Absolute Maximum Ratings  
Parameter  
Input Voltage (continuous)  
Remote On/Off  
Min  
-0.3V  
-0.3V  
-
-40°C  
-55°C  
Typ  
Max  
80V  
18V  
2000V  
85°C  
125°C  
Notes  
-
-
-
-
-
I/O Isolation Voltage  
Ambient Temperature  
Storage Temperature  
Input Specifications  
Parameter  
Min  
Typ  
Max  
Notes  
Input Voltage  
36V  
48V  
75V  
Input Current (full load)  
-
-
-
6.4A  
Input Current (no load)  
120mA  
5mA  
180mA  
10mA  
Remote Off Input Current  
Tested with simulated source impedance  
of 10uH, 5Hz to 20MHz; use a  
100uF/100V electrolytic capacitor with  
Input Reflected Ripple Current (pk-pk)  
-
-
20mA  
40mA  
Input Reflected Ripple Current (RMS)  
5mA  
10mA  
ESR = 1 ohm max. at 200KHz at 25°C.  
I2t Inrush Current Transient  
Turn-on Voltage Threshold  
Turn-off Voltage Threshold  
-
0.05A2s  
34V  
0.1A2s  
35V  
32V  
30V  
32V  
33V  
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com  
ISOLATED DC/DC CONVERTERS  
48V Input 3.3V/60A, 5V/40A, 12V/17A Output  
Output Specifications  
Parameter  
Min  
Typ  
Max  
Notes  
Output Voltage Set Point  
VO=12.0V  
VO=5.0V  
Vo=3.3V  
11.820V  
4.925V  
3.250V  
12.0V  
5.0V  
3.3V  
12.180V  
5.075V  
3.350V  
Vin=48V, Io=50% full  
load, Ta=25°C.  
Line Regulation  
Load Regulation  
VO=12.0V  
VO=5.0V  
VO=3.3V  
-
-
-
±12mV  
±5mV  
±3mV  
±24mV  
±10mV  
±7mV  
VO=12.0V  
VO=5.0V  
VO=3.3V  
-
-
-
±30mV  
±10mV  
±7mV  
±60mV  
±20mV  
±15mV  
Regulation Over Temperature (-40°C to +85°C)  
VO=12.0V  
VO=5.0V  
VO=3.3V  
±60mV  
±45mV  
±30mV  
±100mV  
±75mV  
±50mV  
-
-
-
Output Current  
VO=12.0V  
0A  
0A  
0A  
-
-
-
17A  
40A  
60A  
VO=5.0V  
VO=3.3V  
Current Limit Threshold  
VO=12.0V  
VO=5.0V  
VO=3.3V  
20A  
48A  
72A  
-
24A  
54A  
81A  
3A2s  
28A  
60A  
90A  
5A2s  
Short Circuit Surge Transient  
Ripple and Noise (RMS)  
VO=12.0V  
-
-
-
25mV  
25mV  
15mV  
50mV  
50mV  
30mV  
Test conditions:  
VO=5.0V  
VO=3.3V  
0-20MHz BW, with a  
1uF ceramic capacitor  
and a 10uF Tantalum  
capacitor at the output.  
Ripple and Noise (pk-pk)  
VO=12.0V  
VO=5.0V  
VO=3.3V  
-
-
-
-
100mV  
100mV  
55mV  
150mV  
150mV  
100mV  
30mS  
Turn on Time  
15mS  
Overshoot at Turn on  
-
0%  
5%  
Output Capacitance  
VO=12.0V  
0uF  
0uF  
0uF  
-
-
-
1000uF  
10000uF  
20000uF  
VO=5.0V  
VO=3.3V  
Transient Response  
Overshoot  
Settling Time  
Overshoot  
-
-
-
-
-
-
-
-
-
-
-
-
200mV  
250uS  
200mV  
250uS  
150mV  
200uS  
150mV  
200uS  
100mV  
200uS  
100mV  
200uS  
400mV  
400uS  
400mV  
400uS  
300mV  
300uS  
300mV  
300uS  
200mV  
300uS  
200mV  
300uS  
25% ~ 50%  
Max Load  
VO=12.0V  
VO=5.0V  
VO=3.3V  
50% ~ 25%  
Max Load  
Settling Time  
Overshoot  
Test conditions: di/dt =  
0.1A/uS, Vin=48V,  
Ta=25°C with a 1uF  
ceramic capacitor and  
a 10uF Tantalum  
25% ~ 50%  
Max Load  
Settling Time  
Overshoot  
50% ~ 25%  
Max Load  
Settling Time  
Overshoot  
capacitor at the output.  
25% ~ 50%  
Max Load  
Settling Time  
Overshoot  
50% ~ 25%  
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  
ISOLATED DC/DC CONVERTERS  
48V Input 3.3V/60A, 5V/40A, 12V/17A Output  
General Specifications  
Parameter  
Min  
Typ  
Max  
Notes  
Efficiency  
VO=12.0V  
VO=5.0V  
VO=3.3V  
90%  
90%  
89%  
93%  
93%  
92%  
-
-
-
Vin=48V, full load , Ta=25°C  
Switching Frequency  
Isolation capacitance  
280KHz  
315KHz  
1500pF  
-
350KHz  
-
-
Output Voltage Trim Range  
Over Temperature Protection  
Over Voltage Protection  
80%Vo  
-
110%Vo  
-
125°C  
122%Vo  
117%Vo  
127%Vo  
Calculated Per Bell Core TR-332 (IO =  
Nominal; Ta = 25°C)  
MTBF  
TBD  
Dimensions  
Inches  
millimeters  
2.28 x 2.4 x 0.42  
57.51 x 60.98 x 10.67  
Weight  
-
76g  
-
Control Specifications  
Parameter  
Min  
Typ  
Max  
Notes  
Remote On/Off  
Signal Low (Unit On)  
-0.3V  
2.4V  
-0.3V  
2.4V  
0mA  
-
-
-
-
-
0.8V  
18V  
07HB-D0TxxL. The remote  
on/off pin open, Unit on.  
Active Low  
Active High  
Signal High (Unit Off)  
Signal Low (Unit Off)  
Signal High (Unit On)  
Current Sink  
0.8V  
07HB-D0Txx0. The remote  
on/off pin open, Unit on.  
18V  
0.75mA  
Output Trim Equations  
Equations for calculating the trim resistor (in kΩ) are shown below. The Trim Down resistor should be connected  
between the Trim pin and Ground pin. The Trim Up resistor should be connected between the Trim pin and the  
Vout. Only one of the resistors should be used for any given application.  
100  
Rtrimdown =  
− 2  
[
kΩ  
]
Vout  
Trim  
GND  
delta  
Module  
Rtrimdown  
Rtrimup  
(100 + delta)⋅Vo −122.5  
1.225⋅delta  
Rtrimup =  
Notes:  
[
− 2 kΩ  
]
Vout  
Trim  
GND  
Module  
(
Vo _ req −Vo  
)
×100  
delta =  
%
[ ]  
Vo  
Vo_req=Desired(trimmed) output voltage[V]  
Output voltage Vo=3.308V for 3.3V output; Vo=5.000V for 5.0V; Vo=12.000V for 12V output  
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com  
ISOLATED DC/DC CONVERTERS  
48V Input 3.3V/60A, 5V/40A, 12V/17A Output  
Efficiency Data  
94%  
92%  
90%  
88%  
86%  
84%  
82%  
80%  
78%  
76%  
74%  
72%  
70%  
36V  
48V  
75V  
5 10 15 20 25 30 35 40 45 50 55 60  
OUTPUT CURRENT (A)  
Vo=3.3V  
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com  
ISOLATED DC/DC CONVERTERS  
48V Input 3.3V/60A, 5V/40A, 12V/17A Output  
Pin Connections  
pin#  
1
function  
-Input  
pin size  
0.04"  
2
N/A  
3
On/Off  
+Input  
+Output  
+Output  
+Sense  
Trim  
0.04"  
0.04"  
0.08"  
0.08"  
0.04"  
0.04"  
0.04"  
0.08"  
0.08"  
4
5
6
7
8
9
-Sense  
-Output  
-Output  
10  
11  
©2004 Bel Fuse Inc. Specifications subject to change without notice. 110404  
CORPORATE  
FAR EAST  
EUROPE  
Bel Fuse Inc.  
Bel Fuse Ltd.  
Bel Fuse Europe Ltd.  
206 Van Vorst Street  
Jersey City, NJ 07302  
Tel 201-432-0463  
Fax 201-432-9542  
www.belfuse.com  
8F/ 8 Luk Hop Street  
San Po Kong  
Kowloon, Hong Kong  
Tel 852-2328-5515  
Fax 852-2352-3706  
www.belfuse.com  
Preston Technology Management Centre  
Marsh Lane, Suite G7, Preston  
Lancashire, PR1 8UD, U.K.  
Tel 44-1772-556601  
Fax 44-1772-888366  
www.belfuse.com