ISOLATED DC/DC CONVERTERS
18 Vdc - 36 Vdc Input
12 Vdc /10 A, 3.3 Vdc/30 A
Outputs
0RCY-80Rxxx
•
•
•
•
•
•
•
RoHS Compliant
•
•
•
•
•
•
Rev. E
Isolated
High Efficiency
High Power Density
Fixed Frequency (300 kHz)
Input Under-Voltage Lockout
Output Over-Voltage Shutdown
Basic Insulation
Low Cost
OCP/SCP
Over Temperature Protection
Output Voltage Trim
Remote On/Off
Positive/Negative Remote Sense
Description
The 0RCY-80Rxxx series are isolated dc/dc converters that operate from a nominal 24 Vdc source. These units
will provide up to 120 W of output power and 30 A of output current from a nominal 24 Vdc input. The 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
1.8 Vdc
3.3 Vdc
12 Vdc
Input Voltage
18 Vdc - 36 Vdc
18 Vdc - 36 Vdc
18 Vdc - 36 Vdc
Max. Output
Current
30 A
30 A
10 A
Max. Output
Power
54 W
99 W
120 W
Typical
Efficiency
90%
91%
93%
Model Number
Active High
0RCY-80RV80
0RCY-80R033
0RCY-80R120
Model Number
Active Low
0RCY-80RV8L
0RCY-80R03L
0RCY-80R12L
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 numbers to indicate Tray Packaging.
Absolute Maximum Ratings
Parameter
Input Voltage (continuous)
Remote On/Off
I/O Isolation Voltage
Ambient Temperature
Storage Temperature
Min
-0.3 V
-0.3 V
1500 V
-40
°C
-55
°C
Typ
-
-
-
-
-
Max
40 V
18 V
-
85
°C
125
°C
Notes
Input Specifications
Parameter
Input Voltage
Input Current (full load)
Vo=1.8 V
Vo=3.3 V
Vo=12 V
Input Current (no load)
Remote Off Input Current
-
-
-
-
-
-
-
-
100 mA
10 mA
3.5 A
6.2 A
8.0 A
280 mA
15 mA
Min
18 V
Typ
24 V
Max
36 V
Notes
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
18 Vdc - 36 Vdc Input
12 Vdc /10 A, 3.3 Vdc/30 A
Outputs
Input Specifications (continued)
Parameter
Input Reflected Ripple Current
(rms)
Input Reflected Ripple Current
(pk-pk)
I t Inrush Current Transient
Turn-on Voltage Threshold
Turn-off Voltage Threshold
2
Min
Typ
5 mA
Max
10 mA
40 mA
0.5 A s
17 V
16.2 V
2
-
-
16 V
15 V
25 mA
0.1 A s
16.5 V
15.5 V
2
Notes
Tested with simulated source impedance
of 10 uH, 5 Hz to 20 MHz; use a 100
uF/100 V electrolytic cap with ESR = 1
ohm max. at 200 kHz at 25
°C.
Note:
All specifications are typical at 25
°C
unless otherwise stated.
Output Specifications
Parameter
Output Voltage Set Point
Vo=1.8 V
Vo=3.3 V
Vo=12 V
Load Regulation
Vo=1.8 V
Vo=3.3 V
Vo=12 V
line Regulation
Vo=1.8 V
Vo=3.3 V
Vo=12 V
Regulation Over Temperature
(-40deg.C ~ +85deg.C)
Vo=1.8 V
Vo=3.3 V
Vo=12 V
Ripple and Noise (rms)
Vo=1.8 V
Vo=3.3 V
Vo=12 V
Ripple and Noise (pk-pk)
Vo=1.8 V
Vo=3.3 V
Vo=12 V
Output Current Range
Vo=1.8 V
Vo=3.3 V
Vo=12 V
Output DC Current Limit
Vo=1.8 V
Vo=3.3 V
Vo=12 V
Short Circuit Surge Transient
Turn on Time
Overshoot at Turn on
Output Capacitance
Vo=1.8 V
Vo=3.3 V
Vo=12 V
0 uF
0 uF
0 uF
-
-
-
20000 uF
10000 uF
1500 uF
-
-
-
Min
1.773 V
3.250 V
11.76 V
-
-
-
Typ
1.80 V
3.30 V
12.0 V
±6
mV
±8
mV
±12
mV
±6
mV
±8
mV
±12
mV
Max
1.827 V
3.350 V
12.24 V
±12
mV
±16
mV
±24
mV
±12
mV
±16
mV
±24
mV
Notes
Vin=24 V, Io=50% load
-
-
-
-
-
-
-
-
-
0A
0A
0A
33 A
33 A
11 A
-
-
-
±15
mV
±20
mV
±30
mV
30 mV
30 mV
30 mV
60 mV
80 mV
100 mV
-
-
-
39 A
39 A
13 A
2A s
60 mS
0%
2
±30
mV
±40
mV
±60
mV
50 mV
50 mV
50 mV
100 mV
120 mV
150 mV
30 A
30 A
10 A
45 A
45 A
15 A
4A s
100 mS
5%
2
0-20 MHz BW, with a 1 µF ceramic cap and
a 10 uF tantalum cap at the 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
18 Vdc - 36 Vdc Input
Parameter
Transient Response
50% ~ 75%
Max Load
75% ~ 50%
Max Load
50% ~ 75%
Max Load
75% ~ 50%
Max Load
50% ~ 75%
Max Load
75% ~ 50%
Max Load
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
12 Vdc /10 A, 3.3 Vdc/30 A
Min
-
-
-
-
-
-
-
-
-
-
-
-
Typ
Outputs
Max
140 mV
150 uS
140 mV
150 uS
200 mV
200 uS
200 mV
200 uS
350 mV
200 uS
350 mV
200 uS
180 mV
250 uS
180 mV
250 uS
300 mV
300 uS
300 mV
300 uS
500 mV
300 uS
500 mV
300 uS
Notes
Output Specifications (continued)
Vo=1.8 V
Vo=3.3 V
di/dt=0.1 A/us, Vin=24 Vdc,
Ta=25 °C, with a 1 µF
ceramic cap and a 10 uF
tantalum cap at output.
Vo=12 V
Note:
All specifications are typical at nominal input, full load at 25°C unless noted.
General Specifications
Parameter
Efficiency
Vo=1.8 V
Vo=3.3 V
Vo=12 V
Switching Frequency
Isolation capacitance
Remote Sense Compensation
Output Voltage Trim Range
Over Temperature Protection
Over Voltage Protection
MTBF
Dimensions
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
Dimensions
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
Weight
-
2.30 x 0.896 x 0.50
58.42 x 22.76 x 12.70
2.30 x 0.90 x 0.50
58.42 x 22.91 x 12.70
TBD
-
0RCY-80RV8x
88%
90%
91%
270 kHz
-
-
80%
-
-
90%
91%
93%
300 kHz
3900 pF
-
-
125
°C
125%Vo
TBD
-
330 kHz
-
10%
110%
-
-
Vin=24 V, full load, in Hiccup mode.
Calculated Per Bell Core SR-332
(Io=80%load, T
a
= 25
°C)
The total voltage increased by trim and
remote sense should not exceed 10%Vo.
Vin=24 V, full load
Min
Typ
Max
Notes
0RCY-80R03x & 0RCY-80R12x
Note:
All specifications are typical at 25
°C
unless otherwise stated.
Control Specifications
Parameter
Remote On/Off
Signal Low (Unit On)
Signal High (Unit Off)
Signal Low (Unit Off)
Signal High (Unit On)
Current Sink
Active Low
Active High
Min
-0.3 V
2.4 V
-0.3 V
2.4 V
0 mA
Typ
-
-
-
-
-
Max
0.8 V
18 V
0.8 V
18 V
1 mA
Notes
The remote on/off pin open, Unit
off.
The remote on/off pin open, Unit
on.
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
18 Vdc - 36 Vdc Input
12 Vdc /10 A, 3.3 Vdc/30 A
Outputs
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.
Rtrimdown
=
511
−
10.22
[
k
Ω
]
delta
Vout
Module
Trim
GND
Rtrimdown
Rtrimup
=
(100
+
delta
)
⋅
Vo
⋅
5.11
−
626
−
10.22
[
k
Ω
]
1 .225
⋅
delta
Vout
Module
Trim
GND
Rtrimup
Note:
delta
=
(
Vo
_
req
−
Vo
)
×
100
[
%
]
Vo
Vo_req=Desired (trimmed) output voltage [V]
For 0RCY-80RV8x, Output voltage Vo=1.8 V; For 0RCY-80R03x, Output voltage Vo=3.3 V; For 0RCY-80R12x,
Output voltage Vo=12 V;
Efficiency Data
Efficiency Curve
92%
88%
84%
Efficiency
80%
76%
72%
68%
64%
60%
3.00
18 V
Efficiency Curve
94%
92%
90%
88%
86%
84%
82%
80%
78%
76%
74%
72%
70%
1.00
18 V
24 V
36 V
Efficiency
24 V
36 V
7.50
15.00
22.50
30.00
2.50
5.00
7.50
10.00
Output Current (A)
Output Current (A)
Vo=1.8 V
Vo=12 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
18 Vdc - 36 Vdc Input
12 Vdc /10 A, 3.3 Vdc/30 A
Outputs
Thermal Derating Curves
Vo=1.8 V
Vo=12 V
Note:
Vin=24 V, with maximum junction temperature of semiconductors derated to 120 degree C.
Ripple and Noise Waveforms
24 Vdc input, 1.8 Vdc/30 A output
24 Vdc input, 12 Vdc/10 A output
Note:
Ripple and noise at full load, with a 1uF ceramic cap and a 10 uF Tantalum cap at output, and 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
