ISOLATED DC/DC CONVERTERS
18 Vdc - 75 Vdc Input
3.3 Vdc /15 A Output
0RCY-60U03x
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RoHS Compliant
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Rev. C
Isolated
High Efficiency
High Power Density
Fixed Frequency (260 kHz)
Input Under-Voltage Lockout
Input Over-Voltage Lockout
Ultra Wide Input Range:
18 Vdc - 75 Vdc
Output Over-Voltage Shutdown
OCP/SCP
Over Temperature Protection
Low Cost
Output Voltage Trim
Positive/Negative Remote Sense
Basic Insulation
Remote On/Off
•
UL60950-1 (UL/cUL) Recognized
(Pending)
Description
The 0RCY-60U03x is part of the isolated dc/dc converters that operate from a wide input range (18 Vdc - 75 Vdc)
and can cover both 24 Vin and 48 Vin input range. These units will provide up to 49.5 W of output power. They
are designed to be highly efficient and low cost. Features include remote on/off, over current protection, over
voltage shut down, over temperature protection and under-voltage lockout. These converters are provided in an
industry standard 1/8 brick package.
Part Selection
Output
Voltage
3.3 Vdc
Input Voltage
18 Vdc - 75 Vdc
Max. Output
Current
15 A
Max. Output
Power
49.5 W
Typical
Efficiency
90%
Model Number
Active High
0RCY-60U033
Model Number
Active Low
0RCY-60U03L
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
-
-40
°C
-55
°C
Typ
-
-
-
-
-
Max
80 V
18 V
1500 V
85
°C
125
°C
Notes
Input Specifications
Parameter
Input Voltage
Input Current (full load)
Vin=18 V
Vin=75 V
Input Current (no load)
Remote Off Input Current
Input Reflected Ripple Current
(rms)
Input Reflected Ripple Current
(pk-pk)
-
Min
18 V
-
-
-
-
Typ
24 V/48 V
3.3 A
0.76 A
65 mA
10 mA
7 mA
30 mA
Max
75 V
-
-
100 mA
15 mA
10 mA
50 mA
Tested with simulated source impedance
of 10 uH, 5 Hz to 20 MHz; use a 1
uF/100 V ceramic cap and a 100 uF/100
V electrolytic cap with ESR = 1 ohm max.
at 200 kHz at 25
°C.
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 - 75 Vdc Input
3.3 Vdc /15 A Output
Input Specifications (continued)
Parameter
I t Inrush Current Transient
Turn-on Voltage Threshold
Turn-off Voltage Threshold
Input Over Voltage Lockout
2
Min
-
16.5 V
15.5 V
76 V
Typ
0.05 A s
17.0 V
16.0 V
78 V
2
Max
0.1 A s
17.5 V
16.5 V
80 V
2
Notes
Output Specifications
Parameter
Output Voltage Set Point
Load Regulation
Line Regulation
Regulation Over Temperature
(-40deg.C ~ +85deg.C)
Ripple and Noise (rms)
Ripple and Noise (pk-pk)
Output Current Range
Output DC Current Limit
Short Circuit Surge Transient
Turn on Time
Overshoot at Turn on
Output Capacitance
Transient Response
Overshoot
75% ~ 50%
Max Load
Settling Time
Overshoot
50% ~ 75%
Max Load
Settling Time
Min
3.25 V
-
-
-
-
-
0A
16.5 A
-
5 mS
-
0 uF
-
-
-
-
Typ
3.30 V
±1
mV
±3.3
mV
±10
mV
10 mV
40 mV
-
-
3A s
12 mS
0%
-
100 mV
150 uS
100 mV
150 uS
2
Max
3.35 V
±6.6
mV
±6.6
mV
±30
mV
20 mV
80 mV
15 A
25 A
5A s
20 mS
3%
4800 uF
150 mV
300 uS
150 mV
300 uS
2
Notes
Vin=48 V, Io=50% load
0-20 MHz BW, with a 0.1 µF ceramic cap
and a 10 uF tantalum cap at the output.
Vin=48 V, in Hiccup Mode.
di/dt=0.1 A/us, Vin=24 Vdc, Ta=25 °C,
with a 0.1 µF ceramic cap and a 10 uF
tantalum cap at output.
Note:
All specifications are typical at 25
°C
unless otherwise stated.
General Specifications
Parameter
Efficiency
Vin=24 V
Vin=48 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)
Weight
-
2.30 x 0.896 x 0.49
58.42 x 22.76 x 12.47
40 g
88.5%
89%
240 kHz
-
-
90%
-
-
90%
90.3%
260 kHz
1500 pF
-
-
125
°C
4.1 V
TBD
-
-
280 kHz
-
10%
110%
-
-
Measured at normal Vin, full load.
Min
Typ
Max
Notes
The total voltage increased by trim and
remote sense should not exceed 15%Vo.
Vin=48 V, full load, in Hiccup mode.
Calculated Per Bell Core SR-332
(Io=80%load, T
a
= 25
°C)
-
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
18 Vdc - 75 Vdc Input
3.3 Vdc /15 A Output
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
0.75 mA
Notes
0RCY-60U03L. The remote
on/off pin open, Unit off.
0RCY-60U033. The remote
on/off pin open, Unit on.
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
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
Ω
]
delta
Rtrimup
=
Note:
Vout
Module
Trim
GND
Rtrimdown
(100
+
delta
)
⋅
Vo
⋅
5.11
−
626
−
10.22
[
k
Ω
]
1 .225
⋅
delta
Vout
Module
Trim
GND
Rtrimup
delta
=
(
Vo
_
req
−
Vo
)
×
100
[
%
]
Vo
Vo_req=Desired (trimmed) output voltage [V]
Output voltage Vo=3.3 V
Efficiency Data
Efficiency Curve
100.00%
90.00%
80.00%
70.00%
60.00%
50.00%
40.00%
30.00%
20.00%
10.00%
0.00%
0
1.5
3.75
7.5
11.25
15.0
Output Current (A)
18V
24V
48V
75V
Efficiency
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 - 75 Vdc Input
3.3 Vdc /15 A Output
Thermal Derating Curves
Vin=24 V, Vo=3.3 V; Maximum FET junction temperature derated to 120 C
Vin=48 V, Vo=3.3 V; Maximum FET junction temperature derated to 120 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
18 Vdc - 75 Vdc Input
3.3 Vdc /15 A Output
Ripple and Noise Waveforms
24 Vdc input, 3.3 Vdc/15 A output
48 Vdc input, 3.3 Vdc/15 A output
Note:
Ripple and noise at full load, 0-20 MHz BW, with a 0.1 uF ceramic cap and a 10 uF tantalum cap
at the output, and Ta=25 deg C.
Transient Response Waveforms
50%-75%-50% Load Transients at Vin=24 V
50%-75%-50% Load Transients at Vin=48 V
Note:
Transients Response at di/dt=0.1 A/us, with a 0.1 µF 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
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