BEL 0RCY

ISOLATED DC/DC CONVERTERS
48 Vdc Input
12 Vdc /12 A Output
0RCY-C2T12x
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RoHS Compliant
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Isolated
High Efficiency
High Power Density
Fixed Frequency (300 kHz)
Low Cost
Input Under-Voltage Lockout
Basic Insulation
Rev.B
Output Over-Voltage Shutdown
OCP/SCP
Over Temperature Protection
Output Voltage Trim
Remote On/Off
Positive/Negative Remote Sense
Description
The 0RCY-C2T12x is isolated dc/dc converter that operates from a nominal 48 Vdc source. This unit will provide
up to 144 W of output power from a nominal 48 Vdc input. This unit is designed to be highly efficient and low cost.
Features include remote on/off, over current protection and under-voltage lockout. This converter is provided in an
industry standard eighth brick package.
Part Selection
Output
Voltage
12 Vdc
Input Voltage
48 Vdc
Max. Output
Current
12 A
Max. Output
Power
144 W
Typical
Efficiency
93%
Model Number
Active High
0RCY-C2T120
Model Number
Active Low
0RCY-C2T12L
Notes: 1. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers.
2. Add “G” suffix at the end of the model number to indicate Tray Packaging.
Absolute Maximum Ratings
Parameter
Input Voltage (continuous)
Input Voltage (Transient)
Min
Typ
Max
-0.3 V
-
80 V
-
-
100 V
Remote On/Off
-0.3 V
-
18 V
Ambient Temperature
-40 C
-
85 C
Storage Temperature
-55 C
-
125 C
Notes
100 mS
Input Specifications
Parameter
Input Voltage
Min
36 V
Typ
48 V
Max
75 V
Input Current (full load)
-
-
5.0 A
Input Current (no load)
-
60 mA
120 mA
Remote Off Input Current
Input Reflected Ripple Current
(rms)
Input Reflected Ripple Current
(pk-pk)
-
10 mA
15 mA
-
5 mA
10 mA
-
25 mA
40 mA
I t Inrush Current Transient
-
0.1 A s
0.5 A s
Turn-on Voltage Threshold
33 V
34 V
36 V
Turn-off Voltage Threshold
31 V
32 V
34 V
2
2
Notes
With simulated source impedance of 10 uH,
5Hz to 20MHz. Use a 100 uF/100 V
electrolytic cap with ESR=1 ohm max, at
200 [email protected]°C.
2
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
ISOLATED DC/DC CONVERTERS
48 Vdc Input
12 Vdc /12 A Output
Output Specifications
Parameter
Output Voltage Set Point
Min
11.76 V
Typ
12.0 V
Max
12.24 V
Load Regulation
-
±12 mV
±24 mV
line Regulation
Regulation Over Temperature
(-40deg.C-85deg.C)
-
±12 mV
±24 mV
-
±30 mV
±60 mV
Ripple and Noise (rms)
-
30 mV
50 mV
Ripple and Noise (pk-pk)
-
90 mV
150 mV
Output Current Range
0A
-
12 A
Output DC Current Limit
13 A
15 A
2
-
2A s
4A s
Turn on Time
-
60 mS
100 mS
-
0%
-
0 uF
-
680 uF
Output Capacitance
0-20MHz BW, with a 1µF ceramic capacitor
and a 10 µF Tantalum cap at output.
17 A
2
Short Circuit Surge Transient
Overshoot at Turn on
Notes
Vin=48 V, Io=50%load
Transient Response
25% ~ 50%
Max Load
50% ~ 25%
Max Load
Overshoot
-
400 mV
600 mV
Settling Time
-
200 uS
300 uS
-
400 mV
600 mV
-
200 uS
300 uS
Overshoot
VO=12 V
Settling Time
di/dt=0.1A/us, Vin=48Vdc,
Ta=25°C, with a 1µF ceramic
capacitor and a 10 µF
Tantalum cap at output.
Note: All specifications are typical at 25 C unless otherwise stated.
General Specifications
Parameter
Min
91%
Typ
93%
Max
-
270 kHz
300 kHz
330 kHz
80%
-
110%
Remote Sense Compensation
-
-
10%
Over Temperature Protection
-
125 C
-
Over Voltage Protection
-
125 %
-
Efficiency
Switching Frequency
Output Voltage Trim Range
MTBF
Notes
Measured at Vin=48 V, full load.
The total voltage increased by trim and
remote sense should not exceed 10%Vo.
Vin=48 V, full load, in hiccup Mode
Calculated Per Bell Core SR-332
(Io=80%load, Ta = 25 C)
TBD
Dimensions
Inches (L × W × H)
Millimeters (L × W × H)
Weight
2.30 x 0.90 x 0.54
58.42 x 22.78 x 13.73
-
47 g
-
Isolation characteristics
Isolation capacitance
-
3900 pF
-
Input to Output Isolation Voltage
1500 V
-
-
Input to Baseplate Isolation Voltage
1500 V
-
-
Output to Baseplate Isolation Voltage
500 V
-
-
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
ISOLATED DC/DC CONVERTERS
48 Vdc Input
12 Vdc /12 A Output
Control Specifications
Parameter
Remote On/Off
Signal Low (Unit On)
Signal High (Unit Off)
Signal Low (Unit Off)
Signal High (Unit On)
Active Low
Active High
Current Sink
Min
Typ
Max
Notes
-0.3 V
-
0.8 V
2.4 V
-
18 V
When Remote On/Off pin is open,
unit is off.
-0.3 V
-
0.8 V
0 mA
-
1 mA
When Remote On/Off pin is open,
unit is on.
Output Trim Equations
Equations for calculating the trim resistor are shown below. The Trim Down resistor should be connected between
the Trim pin and GND pin. The Trim Up resistor should be connected between the Trim pin and the Vout pin. Only
one of the resistors should be used for any given application.
511
Rtrimdown 
 10.22k
delta
Vout
Module
Trim
GND
Rtrimup 
(100  delta)  Vo  5.11  626
 10.22k 
1 .225  delta
Vout
Module
Note:
delta 
Vo _ req  Vo   100 % 
Rtrimdown
Trim
Rtrimup
GND
Vo
Vo_req=Desired (trimmed) output voltage [V]
Output voltage Vo=12.0 V
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
48 Vdc Input
12 Vdc /12 A Output
Efficiency Data
Efficiency Curve
94%
92%
90%
Efficiency
88%
36 V
86%
84%
82%
48 V
75 V
80%
78%
76%
74%
72%
70%
1.20
3.00
6.00
9.00
12.00
Output Current (A)
Thermal Derating Curve
Vin=48 V, with maximum junction temperature of semiconductors derated to 120 degree C.
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
48 Vdc Input
12 Vdc /12 A Output
Ripple and Noise Waveform
48 Vdc input, 12.0 Vdc/12 A output
Note: Ripple and noise at full load, 0-20 MHz BW, Ta=25 deg C, with a 1uF ceramic cap and a 10 uF Tantalum
cap at output.
Transient Response Waveforms
Vout=12.0 V, 50%-25% Load Transient
Vout=12.0 V, 25%-50% Load Transient
Note: Transient Response at Vin=48 V, di/dt=0.1 A/uS, external 10 uF tantalum Cap and 1uF ceramic Cap at the
output, Ta=25 deg C.
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
48 Vdc Input
12 Vdc /12 A Output
Mechanical Outline
Pin Connections
Pin
Name
Pin Dia
1
2
3
4
5
6
7
8
Vin+
On/Off
VinVoutSenseTrim
Sense+
Vout+
0.040’’
0.040’’
0.040’’
0.062’’
0.040’’
0.040’’
0.040’’
0.062’’
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and
other hazardous substances from electronic products.
2009 Bel Fuse Inc. Specifications subject to change without notice. 061809
CORPORATE
FAR EAST
EUROPE
Bel Fuse Inc.
206 Van Vorst Street
Jersey City, NJ 07302
Tel 201-432-0463
Fax 201-432-9542
www.belfuse.com
Bel Fuse Ltd.
8F/ 8 Luk Hop Street
San Po Kong
Kowloon, Hong Kong
Tel 852-2328-5515
Fax 852-2352-3706
www.belfuse.com
Bel Fuse Europe Ltd.
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