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 / 5V/2A or 12V/1A or 24V/0.5A Output
Isolated
Low
Cost
High
Efficiency
OCP/SCP
High Power Density
Excellent Thermal Performance
Output Over-voltage Protection
Description
The 07LC-10T Series converters are isolated DC/DC converters that operate from a nominal 48V source.
These converters provide up to 12W of output power. These units are designed to be highly efficient and cost-
effective. Features include remote on/off, short circuit protection, over-current protection, and output over-
voltage protection. These converters are provided in a compact, industry standard package.
Part Selection
Output
Voltage
Input Voltage
Max. Output
Current
Max. Output
Power
Typical
Efficiency
Model Number
5V
36 72V
2A 10W 82% 07LC-10T050
12V
36 72V
1A 12W 83% 07LC-10T120
24V
36 72V
0.5A
12W
85%
07LC-10T240
Note:
Add "G" suffix at the end of the model number to indicate Tray Packaging.
Absolute Maximum Ratings
Parameter
Min
Typ
Max
Notes
Input Voltage (continuous)
-0.3V
-
72V
Input Voltage (peak/surge)
-
-
100V
100ms non-repetitive
Remote On/Off (Active Low)
-0.3V
-
18V
Remote On/Off (Active High)
-0.3V
-
7V
Output Power
-
-
12W
Ambient Temperature
0
C
-
70
C
Storage Temperature
-40
C
-
125
C
Input Specifications
Parameter
Min
Typ
Max
Notes
Input Voltage
36V
-
72V
Input Current (no load)
-
25mA
40mA
Input Current (full load)
-
-
0.45 A
Remote Off Input Current (Active Low)
-
5mA
10mA
Remote Off Input Current (Active High)
-
10mA
Input Reflected Ripple Current
(pk-pk)
- 15mA
30mA
Input Reflected Ripple Current
(RMS)
- 5mA
10mA
Tested with simulated source
impedance of 10uH, 5Hz to 20MHz;
use a 47uF/100V electrolytic
capacitor with ESR = 1 ohm max. at
200KHz at 25
C
I
2
t Inrush Current Transient
-
0.039A
2
s 0.062A
2
s
Turn-on Voltage Threshold
-
30V
-
Note:
All specifications are typical at nominal input, full load at 25
C
unless otherwise stated.
07LC-10T Series
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 / 5V/2A or 12V/1A or 24V/0.5A Output
Output Specifications
Parameter
Min
Typ
Max
Notes
Output Voltage Set Point
V
O
=5V
V
O
=12V
V
O
=24V
4.850V
11.64V
23.28V
5.00V
12.00V
24.00V
5.150V
12.36V
24.72V
V
in
=48V for all outputs
Line Regulation
V
O
=5V
V
O
=12V
V
O
=24V
-
-
-
10mV
20 mV
35 mV
15 mV
36 mV
48 mV
Load Regulation
V
O
=5V
V
O
=12V
V
O
=24V
-
-
-
15mV
36 mV
48 mV
25 mV
60 mV
80 mV
Regulation Over Temperature (0
C to 70C)
- 75mV
150mV
Output Current
V
O
=5V
V
O
=12V
V
O
=24V
0.2A
0.1A
0.05A
-
-
-
2A
1A
0.5A
Current Limit Threshold
(V
O
= 90% V
O, nom)
V
O
=5V
V
O
=12V
V
O
=24V
-
-
-
3A
1.5A
0.75A
-
-
-
Short Circuit Surge Transient
-
TBD
-
A
2
s
Ripple and Noise (RMS)
V
O
=5V
V
O
=12V
V
O
=24V
-
-
-
18mV
21mV
45mV
30mV
40mV
70mV
0 - 20MHz Bandwidth
with 1uF ceramic load
capacitance
Ripple and Noise (pk-pk)
V
O
=5V
V
O
=12V
V
O
=24V
-
-
-
60mV
80mV
120mV
100mV
120mV
180mV
0 - 20MHz Bandwidth
with 1uF ceramic load
capacitance
Turn on Time
-
2mS
-
Overshoot at Turn on
-
0%
3%
Output Capacitance
V
O
=5V
V
O
=12V
V
O
=24V
0uF
0uF
0uF
-
-
-
800uF
100uF
20uF
Transient Response
Overshoot -
100mV
150mV
50% ~ 100%
Max Load
Settling Time
-
100uS
150uS
Overshoot -
100mV
150mV
100% ~ 50%
Max Load
Settling Time
V
O
=5V
- 100uS
150uS
Overshoot
-
150mV
250mV
50% ~ 100%
Max Load
Settling Time
-
150uS
200uS
Overshoot
-
150mV
250mV
100% ~ 50%
Max Load
Settling Time
V
O
=12V
-
150uS
200uS
Overshoot
-
350mV
500mV
50% ~ 100%
Max Load
Settling Time
-
200uS
250uS
Overshoot
-
350mV
500mV
100% ~ 50%
Max Load
Settling Time
V
O
=24V
-
200uS
250uS
di/dt = 0.1A/uS; Vin =
48V; Ta = 25
C and 1uF
ceramic capacitance
Note:
All specifications are typical at nominal input, full load 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
ISOLATED DC/DC CONVERTERS
48V Input / 5V/2A or 12V/1A or 24V/0.5A Output
General Specifications
Parameter
Min
Typ
Max
Notes
Efficiency
V
O
=5V
V
O
=12V
V
O
=24V
78%
79%
81%
82%
83%
85%
-
-
-
V
in
=48V, I
O
= I
O
, max
Switching Frequency
200KHz
250KHz
300KHz
Output Trim Range
95%V
O
- 105%V
O
For all outputs
Protection Features
Overvoltage Protection Setpoint
V
O
=5V
V
O
=12V
V
O
=24V
-
-
-
6.8V
15V
30V
-
-
-
MTBF
2,000,000 hours
Calculated Per Bell Core TR-332 (I
O
=
Nomal; T
a
= 25
C)
Isolation -
1500
V
-
Dimensions
Inches (L W H)
Millimeters (L W H)
1.91 x 0.98 x 0.477
48.51 x 24.89 x 12.12
Weight -
10.3g
-
Note
: All specifications are typical at 25
C
unless otherwise stated.
Control Specifications
Parameter
Min
Typ
Max
Notes
Remote On/Off
Signal Low (Unit On)
-0.3V
-
0.8V
Signal High (Unit Off)
Active Low
2.4V - 18V
Signal Low (Unit Off)
-0.3V
-
0.8V
Signal High (Unit On)
Active High
2.4V - 7V
The remote on/off pin open, Unit On.
Output Trim Equations
Equations for calculating the trim resistor (in k) given the desired adjusted voltage (Vadj) and the nominal
output voltage of the converter (Vnom) are shown below. The Trim Down resistor should be connected between
the Trim pin and Vout. The Trim Up resistor should be connected between the Trim pin and Ground. Only one of
the resistors should be used for any given application.
B
V
V
A
R
adj
nom
TrimDown
-
-
=
D
V
V
C
R
nom
adj
TrimUp
-
-
=
Vnom
A B C D
24 489.490
28.310
26.660 6.810
12 113.550
16.990
13.020 6.490
5
56.410 51.200 18.228 36.500
Module
Vout
Trim
GND
Rtrimup
Module
Vout
Trim
GND
Rtrimdown
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 / 5V/2A or 12V/1A or 24V/0.5A Output
Efficiency Data
07LC-10T050 07LC-10T120
07LC-10T240
50.00%
55.00%
60.00%
65.00%
70.00%
75.00%
80.00%
85.00%
90.00%
0.00
0.50
1.00
1.50
2.00
OUTPUT CURRENT (A)
E
F
F
I
CI
E
N
CY
36V
48V
72V
50.00%
55.00%
60.00%
65.00%
70.00%
75.00%
80.00%
85.00%
90.00%
0.00 0.20 0.40 0.60 0.80 1.00
OUTPUT CURRENT (A)
EF
F
I
C
I
EN
C
Y
36V
48V
72V
50.00%
55.00%
60.00%
65.00%
70.00%
75.00%
80.00%
85.00%
90.00%
0.05
0.13
0.25
0.38
0.50
OUTPUT CURRENT
EF
F
I
C
I
EN
C
Y
36V
48V
72V
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 / 5V/2A or 12V/1A or 24V/0.5A Output
Thermal Derating Curves
Vo=5V, Io=2A
Vo=12V, Io=1A
Vo=24V, Io=0.5A
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