ISOLATED DC/DC CONVERTERS
48 Vdc Input 1.2 Vdc - 12 Vdc / 8.33 A - 30 A Output, 1/8 Brick
0RCY-85T Series
•
•
•
•
•
•
•
•
RoHS Compliant
•
•
•
•
•
•
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•
Rev.A
Isolated
High Efficiency
High Power Density
Fixed Frequency (300 kHz)
Low Cost
Input Under Voltage Lockout
Safety Approval to UL60950-1
(UL/cUL)
Pre-Bias Start Up
Output Over Voltage Shutdown
OCP/SCP
Over Temperature Protection
Remote On/Off
Output Voltage Trim
Positive/Negative Remote Sense
Basic Insulation
Pin Length (option)
Description
The 0RCY-85T Series are isolated dc/dc converters that operate from a nominal 48 Vdc source. These units
provide up to 100 W 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, over temperature protection, input
under voltage lockout, and output over voltage protection. These converters are provided in a compact, 1/8 brick
industry standard package.
Part Selection
Output
Voltage
12.0 V
5.0 V
3.3 V
2.5 V
1.8 V
1.5 V
1.2 V
Input Voltage
36 V - 75 V
36 V - 75 V
36 V - 75 V
36 V - 75 V
36 V - 75 V
36 V - 75 V
36 V - 75 V
Max. Output
Current
8.33 A
20 A
25 A
25 A
25 A
30 A
30 A
Max. Output
Power
100 W
100 W
85 W
62.5 W
45 W
45 W
36 W
Typical
Efficiency
91%
91%
90%
89%
88%
86%
84%
Model Number
Active High
0RCY-85T120
0RCY-85T050
0RCY-85T033
0RCY-85T025
0RCY-85TV80
0RCY-85TV50
0RCY-85TV20
Model Number
Active Low
0RCY-85T12L
0RCY-85T05L
0RCY-85T03L
0RCY-85T02L
0RCY-85TV8L
0RCY-85TV5L
0RCY-85TV2L
Notes:
1.Change the last character to “M” to indicate 0.18’’ pin length and active low.
2. Add “G” suffix at the end of the model number to indicate Tray Packaging.
3. All part numbers above indicate RoHS 6. Change the second letter "R" to "7" for RoHS 5 part numbers.
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
2000 V
85
°C
125
°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
48 Vdc Input 1.2 Vdc - 12 Vdc / 8.33 A - 30 A Output, 1/8 Brick
Input Specifications
Parameter
Input Voltage
Input Current (full load)
Vo=12.0 V
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Input Current (no load)
Vo=12.0 V
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Remote Off Input Current
Input Reflected Ripple Current (pk-pk)
Input Reflected Ripple Current (rms)
I t Inrush Current Transient
Turn-on Voltage Threshold
Turn-off Voltage Threshold
2
Min
36 V
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Typ
48 V
-
-
-
-
-
-
-
65 mA
65 mA
60 mA
55 mA
50 mA
40 mA
35 mA
6 mA
12 mA
2 mA
0.01 A s
34 V
32 V
2
Max
75 V
3.2 A
3.2 A
2.8 A
2.2 A
1.7 A
1.7 A
1.5 A
90 mA
90 mA
80 mA
75 mA
70 mA
60 mA
50 mA
12 mA
24 mA
4 mA
0.02 A s
35 V
33 V
2
Notes
-
-
-
32 V
30 V
Tested with simulated source
impedance of 10 uH, 5 Hz to 20 MHz;
use a 100 uF/100 V electrolytic
capacitor with ESR = 1 ohm max. at
200 kHz at 25
°C.
Output Specifications
Parameter
Output Voltage Set Point
Vo=12.0 V
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Line Regulation
V
O
=12.0 V-3.3 V
V
O
=1.2 V-2.5 V
Load Regulation
Vo=12.0 V
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
-
-
-
-
-
-
-
-
-
Min
11.760 V
4.925 V
3.250 V
2.463 V
1.773 V
1.477 V
1.182 V
Typ
12.0 V
5.0 V
3.3 V
2.5 V
1.8 V
1.5 V
1.2 V
±2
mV
±1
mV
±8
mV
±8
mV
±6
mV
±4
mV
±3
mV
±3
mV
±2
mV
Max
12.24 V
5.075 V
3.350 V
2.538 V
1.827 V
1.523 V
1.218 V
±5
mV
±3
mV
±16
mV
±16
mV
±12
mV
±8
mV
±6
mV
±6
mV
±4
mV
Notes
Vin=48 V, Io=50% full load,
Ta=25
°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 1.2 Vdc - 12 Vdc / 8.33 A - 30 A Output, 1/8 Brick
Output Specifications (continued)
Parameter
Regulation Over Temperature
(-40
°C
to +85
°C)
Vo=12.0 V
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Output Current
Vo=12.0 V
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Current Limit Threshold
Vo=12.0 V
Vo=5.0 V
Vo=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Short Circuit Surge Transient
Ripple and Noise (rms)
V
O
=12.0 V
V
O
=5.0 V
V
O
=1.2 V-3.3 V
Ripple and Noise (pk-pk)
V
O
=12.0 V
V
O
=5.0 V
V
O
=3.3 V
V
O
=1.2 V-2.5 V
Turn on Time
Overshoot at Turn on
Output Capacitance
V
O
=12.0 V
V
O
=5.0 V
V
O
=1.2 V- 3.3 V
Transient Response
Overshoot
25% ~ 50%
Max Load
Settling Time
Overshoot
50% ~ 25%
Max Load
Settling Time
Overshoot
25% ~ 50%
Max Load
Settling Time
Overshoot
50% ~ 25%
Max Load
Settling Time
Overshoot
25% ~ 50%
Max Load
Settling Time
Overshoot
50% ~ 25%
Max Load
Settling Time
-
-
-
-
-
-
0 uF
0 uF
0 uF
-
-
-
-
-
-
-
-
-
-
-
-
100 mV
80 mV
45 mV
40 mV
-
0%
-
-
-
300 mV
200 uS
300 mV
200 uS
200 mV
200 uS
200 mV
200 uS
150 mV
200 uS
150 mV
200 uS
150 mV
120 mV
90 mV
80 mV
30 mS
5%
1000 uF
10000 uF
20000 uF
400 mV
300 uS
400 mV
300 uS
300 mV
300 uS
300 mV
300 uS
200 mV
300 uS
200 mV
300 uS
-
-
-
30 mV
25 mV
15 mV
50 mV
50 mV
30 mV
Test conditions:
0-20 MHz BW, with a 1 uF
ceramic capacitor and a
10 uF Tantalum capacitor
at the output.
10 A
23 A
30 A
27 A
27 A
32 A
32 A
-
13 A
29 A
36 A
33 A
33 A
36 A
36 A
2
3A s
16 A
35 A
42 A
40 A
40 A
45 A
45 A
2
5A s
0A
0A
0A
0A
0A
0A
0A
-
-
-
-
-
-
-
8.33 A
20 A
25 A
25 A
25 A
30 A
30 A
Min
Typ
±50
mV
±50
mV
±20
mV
±15
mV
±15
mV
±10
mV
±10
mV
Max
±75
mV
±75
mV
±40
mV
±30
mV
±30
mV
±20
mV
±20
mV
Notes
-
-
-
-
-
-
-
V
O
=12.0 V
V
O
=5.0 V
Test conditions: di/dt =
0.1 A/uS, Vin=48 V,
with a 1 uF ceramic
capacitor and a 10 uF
Tantalum capacitor at
the output.
V
O
=3.3 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 1.2 Vdc - 12 Vdc / 8.33 A - 30 A Output, 1/8 Brick
Output Specifications (continued)
Parameter
Transient Response
Overshoot
25% ~ 50%
Max Load
Settling Time
Overshoot
50% ~ 25%
Max Load
Settling Time
Overshoot
25% ~ 50%
Max Load
Settling Time
Overshoot
50% ~ 25%
Max Load
Settling Time
Overshoot
25% ~ 50%
Max Load
Settling Time
Overshoot
50% ~ 25%
Max Load
Settling Time
Overshoot
25% ~ 50%
Max Load
Settling Time
Overshoot
50% ~ 25%
Max Load
Settling Time
Min
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Typ
150 mV
150 uS
150 mV
150 uS
140 mV
150 uS
140 mV
150 uS
130 mV
150 uS
130 mV
150 uS
120 mV
150 uS
120 mV
150 uS
Max
200 mV
200 uS
200 mV
200 uS
170 mV
200 uS
170 mV
200 uS
150 mV
200 uS
150 mV
200 uS
140 mV
200 uS
140 mV
200 uS
Notes
V
O
=2.5 V
V
O
=1.8 V
V
O
=1.5 V
Test conditions: di/dt =
0.1 A/uS, Vin=48 V, with
a 1 uF ceramic capacitor
and a 10 uF Tantalum
capacitor at the output.
V
O
=1.2 V
Note:
All specifications are typical at 25
°C
unless otherwise stated.
General Specifications
Parameter
Efficiency
V
O
=12.0 V
V
O
=5.0 V
V
O
=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
Switching Frequency
Isolation capacitance
Output Voltage Trim Range
V
O
=1.5 V-12 V
V
O
=1.2 V
Remote Sense
Over Temperature Protection
Over Voltage Protection
Pre-bias Voltage
V
O
=5.0 V
V
O
=3.3 V
Vo=2.5 V
Vo=1.8 V
Vo=1.5 V
Vo=1.2 V
MTBF
Dimensions
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
Weight
-
2.30 x 0.896 x 0.395
58.42 x 22.76 x 10.03
27 g
-
88%
88%
87%
86%
85%
83%
81%
270 kHz
-
80% Vo
90% Vo
-
-
-
-
-
-
-
-
-
91%
91%
90%
89%
88%
86%
84%
300 kHz
1500 pF
-
-
-
125
°C
130% Vo
-
-
-
-
-
-
1,583,176 hours
-
-
-
-
-
-
-
330 kHz
-
110% Vo
110% Vo
10%
-
-
4.0 V
1.4 V
2.0 V
1.4 V
1.2 V
0.9 V
Calculated Per Bell Core SR-332
(Vin=48 V, Vo=3.3 V, Io=20 A, T
a
= 25
°C)
The total voltage increased by trim and
remote sense should not exceed
10%Vo.
Min
Typ
Max
Notes
Vin=48V, Io=Io, max
Vin=48V, full load, in hiccup mode.
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 1.2 Vdc - 12 Vdc / 8.33 A - 30 A Output, 1/8 Brick
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 High
Active Low
-0.3 V
2.4 V
-0.3 V
2.4 V
0 mA
-
-
-
-
-
0.8 V
18 V
0.8 V
18 V
0.75 mA
0RCY-85TxxL. The remote
on/off pin open, Unit off.
0RCY-85Txx0. The remote
on/off pin open, Unit on.
Min
Typ
Max
Notes
Output Trim Equations
Equations for calculating the trim resistor 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.
511
Rtrim
−
down
=
−
10.22
[
k
Ω
]
delta
Vout
Module
Trim
Rtrim-down
Vo=1.5 V-12 V:
GND
Rtrim
−
up
=
(100
+
delta
)
⋅
Vo
⋅
5.11
−
626
−
10.22
[
k
Ω
]
1.225
⋅
delta
Module
Vout
Rtrim-up
Vo=1.2 V:
Trim
Rtrim
−
up
=
(100
+
delta
)
⋅
Vo
⋅
5.11
−
313
−
10.22
[
k
Ω
]
0.6125
⋅
delta
GND
Notes:
delta
=
(
Vo
_
req
−
Vo
)
×
100
[
%
]
Vo
Vo_req=Desired (trimmed) output voltage [V]
Output voltage Vo=1.202 V for 1.2 V output; Vo=1.503 V for 1.5 V output; Vo=1.804 V for 1.8 V; Vo=2.505 V for
2.5 V output; Vo=3.308 V for 3.3 V output; Vo=5.000 V for 5.0 V; Vo=12.000 V for 12 V output
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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