Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
Tel 201
-
432
-
0463
Fax 201
-
432
-
9542
ISOLATED DC/DC CONVERTERS
48
V
dc
Input
1.2
V
dc
-
12
V
dc
/
8.33
A
-
30
A Output, 1/8 Brick
Converter
Isolated
Output Over V
oltage Shutdown
High Efficiency
OCP/SCP
High Power Density
Over T
emperature Protection
Fixe
d Frequency (300 kHz)
Remote On/Off
Low Cost
Output Voltage Trim
Input Under V
Safety Approval to UL60950
-
1
(UL/
cUL
)
Pre
-
B
ias
S
tart
U
p
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
V
dc
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
Vol
tage
Input Voltage
Max. Output
Current
Max. Output
Power
Typical
Efficiency
Model Number
Active High
Model Number
Active Low
12.0
V
36
V
-
75
V
8
.33
A
100
W
9
1
%
0RCY
-
85T
120
0RCY
-
85T
12L
5.0
V
36
V
-
75
V
20
A
100
W
9
1
%
0RCY
-
85T
050
0RCY
-
85T
05L
3.3
V
36
V
-
75
V
25
A
85
W
90
%
0RCY
-
85T
033
0RCY
-
85T
03L
2.5 V
36
V
-
75
V
25 A
62.5 W
89%
0RCY
-
85T
02
5
0RCY
-
85T
0
2L
1.8 V
36
V
-
75
V
25 A
45 W
88%
0RCY
-
85T
V8
0
0RCY
-
85T
V8
L
1.5 V
36
V
-
75
V
30 A
45 W
86%
0RCY
-
85T
V50
0RCY
-
85T
V5
L
1.2 V
36
V
-
75
V
30 A
36 W
84%
0RCY
-
85T
V20
0RCY
-
85T
V2
L
Note
s
:
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
Min
Typ
Max
Notes
Input Voltage (continuous)
-
0.3
V
-
80
V
In
p
ut
Vol
tage Transient
P
rotection
-
-
100 V
Operating for 100mS
Remote On/Off
-
0.3
V
-
18
V
I/O Isolation Voltage
-
-
2000
V
Ambient Temperature
-
40
C
-
100
C
Storage Temperature
-
55
C
-
125
C
0R
CY
-
85T Series
RoHS Compliant
Rev.
B
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
Tel 201
-
432
-
0463
Fax 201
-
432
-
9542
ISOLATED DC/DC CONVERTERS
48
V
dc
Input
1.2
V
dc
-
12
V
dc
/
8.33
A
-
30
A Output, 1/8 Brick
Converter
Input Specifications
Parameter
Min
Typ
Max
Notes
Input Voltage
36
V
48
V
75
V
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
-
-
-
-
-
-
-
-
-
-
-
-
-
-
3.
2
A
3.
2
A
2.8
A
2.2 A
1.7 A
1.7 A
1.5 A
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
-
-
-
-
-
-
-
65
mA
65
mA
60
mA
55
mA
50
mA
40
mA
35
mA
90
mA
90
mA
80
mA
75
mA
70
mA
60
mA
50
mA
Remote Off Input Current
6
mA
12
mA
Input Reflected Ripple Current
(pk
-
pk)
-
12
mA
24
mA
I
nput Reflected Ripple Current (
rms
)
-
2
mA
4
mA
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
k
Hz at 25
C
.
I
2
t Inrush Current Transient
-
0.01
A
2
s
0.02
A
2
s
Turn
-
on Voltage Threshold
32
V
34
V
35
V
Turn
-
off Voltage Threshold
30
V
32
V
33
V
Output Specifications
Parameter
Min
Typ
Max
Notes
Output Voltag
e 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
11.
760
V
4.9
2
5
V
3.
250
V
2.463 V
1.773 V
1.477 V
1.182 V
12
.0
V
5.0
V
3.3
V
2.5 V
1.8 V
1.5 V
1.2 V
12.
24
V
5.0
7
5
V
3.3
50
V
2.538 V
1.827 V
1.523 V
1.218 V
Vin=48
V, Io=50%
ful
l
load,
Ta=25
C.
Line Regulation
V
O
=12.0
V
-
3.3
V
V
O
=
1.2
V
-
2.5
V
-
-
2
mV
1
mV
5
mV
3
mV
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
-
-
-
-
-
-
-
8
mV
8
mV
6
mV
4
mV
3
mV
3
mV
2
mV
16
mV
16
mV
1
2
mV
8
mV
6
mV
6
mV
4
mV
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
Tel 201
-
432
-
0463
Fax 201
-
432
-
9542
ISOLATED DC/DC CONVERTERS
48
V
dc
Input
1.2
V
dc
-
12
V
dc
/
8.33
A
-
30
A Output, 1/8 Brick
Converter
Output Specifications
(
continue
d)
Parameter
Min
Typ
Max
Notes
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
-
-
-
-
-
-
-
5
0
mV
50
mV
2
0
mV
15
mV
15
mV
10
mV
10
mV
75
mV
75
mV
4
0
mV
30
mV
30
mV
20
mV
20
mV
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
0
A
0
A
0
A
0 A
0 A
0 A
0 A
-
-
-
-
-
-
-
8.33
A
20
A
25
A
25
A
25
A
30
A
30
A
Current Limit Thresh
old
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
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
16
A
35
A
42
A
40 A
40 A
45 A
45 A
Short Circuit Surge Transient
-
3
A
2
s
5
A
2
s
Ripple and Noise (
rms
)
V
O
=12.0
V
V
O
=5.0
V
V
O
=
1.2 V
-
3.3
V
-
-
-
30
mV
25
mV
15
mV
50
mV
5
0
mV
3
0
mV
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
-
-
-
-
100
mV
8
0
mV
4
5
mV
40
mV
150
mV
1
2
0
mV
9
0
mV
80
mV
Test conditions:
0
-
20
MHz BW,
with a 1
uF
ceramic cap
acitor
and a
10
uF Tantalum cap
acitor
at
the
output.
Turn on Time
-
-
30
mS
Overshoot at Turn on
-
0%
5%
Output Capacitance
V
O
=12.0
V
V
O
=5.0
V
V
O
=
1.2
V
-
3.3
V
0
uF
0
uF
0
uF
-
-
-
1000
uF
10000
uF
20000
uF
Transient Response
Overshoot
-
300
mV
4
00
mV
25% ~ 50%
Max Load
Settling Time
-
2
0
0
uS
3
0
0
uS
Overshoot
-
300
mV
4
00
mV
50% ~ 25%
Max Load
Settling Time
V
O
=12.0
V
-
2
0
0
uS
3
0
0
uS
Overshoot
-
200
mV
300
mV
25% ~ 50%
Max Load
Settling Time
-
200
uS
300
uS
Overshoot
-
200
mV
300
mV
50% ~ 25%
Max Load
Settling Time
V
O
=5.0
V
-
200
uS
300
uS
Overshoot
-
150
mV
200
mV
25% ~ 50%
Max Load
Settling
Time
-
20
0
uS
3
00
uS
Overshoot
-
150
mV
200
mV
50% ~ 25%
Max Load
Settling Time
V
O
=3.3
V
-
20
0
uS
3
00
uS
Test conditions
:
di/dt =
0.1
A/uS
,
Vin=48
V
,
with a 1
uF ceramic
cap
acitor
and a 10
uF
Tantalum cap
acitor
at
the
output.
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
Tel 201
-
432
-
0463
Fax 201
-
432
-
9542
ISOLATED DC/DC CONVERTERS
48
V
dc
Input
1.2
V
dc
-
12
V
dc
/
8.33
A
-
30
A Output, 1/8 Brick
Converter
Output Specifications
(
continue
d)
Parameter
Min
Typ
Max
Notes
Transient Response
Overshoot
-
1
5
0
mV
20
0
mV
25% ~ 50%
Max Load
Settling Time
-
1
5
0
uS
200
uS
Overshoot
-
1
5
0
mV
20
0
mV
50% ~ 25%
Max Load
Settling Time
V
O
=
2.5
V
-
1
5
0
uS
200
uS
Overshoot
-
140
mV
1
7
0
mV
25% ~ 50%
Max Load
Settling Time
-
15
0
uS
200
uS
Overshoot
-
140
mV
1
7
0
mV
50% ~ 25%
Max Load
Settling Time
V
O
=
1.8
V
-
15
0
uS
200
uS
Overshoot
-
1
3
0
mV
150
mV
25% ~ 50%
Max Load
Settling Time
-
150
uS
200
uS
Overs
hoot
-
1
3
0
mV
150
mV
50% ~ 25%
Max Load
Settling Time
V
O
=
1.5
V
-
150
uS
200
uS
Overshoot
-
1
2
0
mV
140
mV
25% ~ 50%
Max Load
Settling Time
-
150
uS
200
uS
Overshoot
-
1
2
0
mV
140
mV
50% ~ 25%
Max Load
Settling Time
V
O
=
1.2
V
-
150
uS
200
uS
Test conditi
ons
:
di/dt =
0.1
A/uS
,
Vin=48
V
,
with
a 1
uF ceramic cap
acitor
and a 10
uF Tantalum
cap
acitor
at
the
output.
Note
:
All specificatio
ns
are typical
at 25
C
unless otherwise stated
.
General Specifications
Parameter
Min
Typ
Max
Notes
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
88%
88
%
8
7
%
8
6
%
85%
83%
81%
91%
91%
9
0
%
89
%
8
8
%
86%
84%
-
-
-
-
-
-
-
Vin=48V,
Io=Io,
max
Switching Frequency
270
k
Hz
300
k
Hz
330
k
Hz
Isolation capacitance
-
1500
pF
-
Output Voltage Trim Range
V
O
=
1.5
V
-
12 V
V
O
=
1.2 V
80%
Vo
9
0%
Vo
-
-
110%
Vo
110%
Vo
Remote Sense
-
-
10%
The total voltage increased by trim and
remote sense should not exceed
10%V
o.
Over Temperature Protection
-
125
C
-
Over Voltage Protection
-
130
%
Vo
-
Vin=48V, full load, in hiccup mode.
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
-
-
-
-
-
-
-
-
-
-
-
-
4.0 V
1.4 V
2.
0 V
1.4 V
1.2 V
0.9 V
MTBF
1,583,176 hours
Calculated Per Bell
Core
S
R
-
332
(
Vin=48 V, Vo=3.3 V, Io=20 A,
T
a
= 25
C)
Dimensions
Inches (L
×
W
×
H)
Millimeters (L
×
W
×
H)
2.3
0 x 0.
896
x 0.39
5
58.42 x 22.
7
6 x
10.0
3
Weight
-
2
7
g
-
Note
: All speci
fications 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
ISOLATED DC/DC CONVERTERS
48
V
dc
Input
1.2
V
dc
-
12
V
dc
/
8.33
A
-
30
A Output, 1/8 Brick
Converter
Control Specifications
Parameter
Min
Typ
Max
Notes
Remote On/Off
Signal Low (Unit On)
-
0.3
V
-
0.8
V
Signal High (Unit Off)
Active Low
2.4
V
-
18
V
0RCY
-
85T
xx
L.
The remote
on/off pin op
en, Unit o
ff
.
Signal Low (Unit Off)
-
0.3
V
-
0.8
V
Signal High (Unit On)
Active High
2.4
V
-
18
V
0RCY
-
85T
xx
0.
The remote
on/off pin open, Unit on.
Current Sink
0
mA
-
0.75
mA
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.
Vo=1.5 V
-
12 V
:
Vo=1
.
2 V:
Note
s
:
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=
5.00
0
V for 5.0
V; Vo=
12.000
V for 12
V output
%
100
_
Vo
Vo
req
Vo
delta
k
delta
Vo
delta
up
Rtrim
22
.
10
6125
.
0
313
11
.
5
)
100
(
k
delta
down
Rtrim
22
.
10
511
k
delta
Vo
delta
up
Rtrim
22
.
10
225
.
1
626
11
.
5
)
100
(
Rtrim
-
down
Vout
Trim
GND
Module
Vout
Trim
GND
Module
Rtrim
-
up
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
Tel 201
-
432
-
0463
Fax 201
-
432
-
9542
ISOLATED DC/DC CONVERTERS
48
V
dc
Input
1.2
V
dc
-
12
V
dc
/
8.33
A
-
30
A Output, 1/8 Brick
Converter
Efficiency Data
0RCY-85T12x EFFICIENCY CURVE
70%
74%
78%
82%
86%
90%
94%
1.60
3.20
4.80
6.00
7.20
8.33
OUTPUT CURRENT (A)
EFFICIENCY
36V
48V
75V
0RCY-85T05x EFFICIENCY CURVE
70%
74%
78%
82%
86%
90%
94%
4
8
12
16
20
OUTPUT CURRENT (A)
EFFICIENCY
36V
48V
75V
0RCY-85T03x EFFICIENCY CURVE
70%
74%
78%
82%
86%
90%
5
10
15
20
25
OUTPUT CURRENT (A)
EFFICIENCY
36V
48V
75V
0RCY-85T02x EFFICIENCY CURVE
70%
74%
78%
82%
86%
90%
5
10
15
20
25
OUTPUT CURRENT (A)
EFFICIENCY
36V
48V
75V
0RCY-85TV8x EFFICIENCY CURVE
60%
64%
68%
72%
76%
80%
84%
88%
5
10
15
20
25
OUTPUT CURRENT (A)
EFFICIENCY
36V
48V
75V
0RCY-85TV5x EFFICIENCY CURVE
60%
64%
68%
72%
76%
80%
84%
88%
6
12
18
24
30
OUTPUT CURRENT (A)
EFFICIENCY
36V
48V
75V
0RCY-85TV2x EFFICIENCY CURVE
60%
64%
68%
72%
76%
80%
84%
88%
6
12
18
24
30
OUTPUT CURRENT (A)
EFFICIENCY
36V
48V
75V
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
Tel 201
-
432
-
0463
Fax 201
-
432
-
9542
ISOLATED DC/DC CONVERTERS
48
V
dc
Input
1.2
V
dc
-
12
V
dc
/
8.33
A
-
30
A Output, 1/8 Brick
Converter
Thermal
Derating Curve
s
Vin=48V, with maximum junction temperature of semiconductors derated to 120 degree C.
0RCY
-
85T
12x
0RCY
-
85T
05x
0RCY
-
85T
03x
0RCY
-
85T
02x
0RCY
-
85T
V8x
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
Tel 201
-
432
-
0463
Fax 201
-
432
-
9542
ISOLATED DC/DC CONVERTERS
48
V
dc
Input
1.2
V
dc
-
12
V
dc
/
8.33
A
-
30
A Output, 1/8 Brick
Converter
Thermal Derating Curve
s (continued)
Ther
mal Reference
Note
:
T
H1
and T
H2
are
hot
spots
which
should not exceed 118 degree C.
0RCY
-
85T
V5x
0
R
CY
-
85TV2x
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
Tel 201
-
432
-
0463
Fax 201
-
432
-
9542
ISOLATED DC/DC CONVERTERS
48
V
dc
Input
1.2
V
dc
-
12
V
dc
/
8.33
A
-
30
A Output, 1/8 Brick
Converter
Ripple and Noise Waveforms
Ri
pple and noise at max load
12
Vdc
/8.33 A
output
Ripple and noise at
max load
5.0
Vdc
/20 A
output
Ripple and noise at max load
3.3
Vdc
/25 A
output
Ripple and noise at
max load
2.5
Vdc
/25 A
output
Ripple and noise at max load
1.8
Vdc
/25 A
output
Ripple and noise at
max load
1.5
Vdc
/30
A
output
.
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
Tel 201
-
432
-
0463
Fax 201
-
432
-
9542
ISOLATED DC/DC CONVERTERS
48
V
dc
Input
1.2
V
dc
-
12
V
dc
/
8.33
A
-
30
A Output, 1/8 Brick
Converter
Ripple and Noise Waveforms
(continued)
Ripple and noise at
max load
1.2
Vdc
/30
A
output
Note:
Ripple and Noise
at
48
V input,
with
a 1 uF ceramic capacitor and a 10
uF tantalum c
ap
acitor
at the output
,
and Ta=25 deg C
Transient Response Waveforms
Transients 50% to 25
% load
12
Vdc output
T
ransients 25
% to 5
0% load
12
Vdc ou
tput
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
Tel 201
-
432
-
0463
Fax 201
-
432
-
9542
ISOLATED DC/DC CONVERTERS
48
V
dc
Input
1.2
V
dc
-
12
V
dc
/
8.33
A
-
30
A Output, 1/8 Brick
Converter
Transient Response Waveforms
(continued)
Transients 50% to 25
% load
5.0
Vdc output
T
ransients 25% to 5
0% load
5.0
Vdc output
Transients 50% to 25
% load
3.3
Vdc output
T
ransients 25% to 5
0% load
3.3
Vdc output
Transients 50% to 25
% load
2.5
Vdc output
T
ransients 25% to 5
0% load
2.5
Vdc output
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
Tel 201
-
432
-
0463
Fax 201
-
432
-
9542
ISOLATED DC/DC CONVERTERS
48
V
dc
Input
1.2
V
dc
-
12
V
dc
/
8.33
A
-
30
A Output, 1/8 Brick
Converter
Transient Response Waveforms
(continued)
Transie
nts 50% to 25
% load
1.8
Vdc output
T
ransients 25% to 5
0% load
1
.8
Vdc output
Transients 50% to 25
% load
1.5
Vdc output
T
ransients 25% to 5
0% load
1.5
Vdc output
Transi
ents 50% to 25
% load
1
.
2
Vdc output
T
ransients 25% to 5
0% load
1
.
2
Vdc output
Note:
Transient response at 48 V input,
di/dt=0.1
A
/uS, with e
xternal 10
uF tantalum c
ap and 1
uF ceramic c
ap
at the output, Ta=25 deg C
.
200
9
Bel Fuse Inc. Specifications subject to change wi
thout notice.
0
52609
CORPORATE
FAR EAST
EUROPE
Bel Fuse Inc.
Bel Fuse Ltd.
Bel Fuse Europe Ltd.
206 Van Vorst Street
8F/ 8 Luk Hop Street
Preston Technology Management Centre
Jersey City, NJ 07302
San Po Kong
Marsh Lane, Suite G7, Preston
Tel 201
-
432
-
0463
Kowloon, Hong Kong
Lancashire, PR1 8UD, U.K.
Fax 201
-
432
-
9542
Tel 852
-
2328
-
5515
Tel 44
-
1772
-
556601
www.belfuse.com
Fax 852
-
2352
-
3706
Fax 44
-
1772
-
888366
www.be
lfuse.com
www.belfuse.com
ISOLATED DC/DC CONVERTERS
48
V
dc
Input
1.2
V
dc
-
12
Vdc
/
8.33
A
-
30
A Output, 1/8 Brick
Mechanical Outline
RoHS Com
p
liance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and
other hazardous substances from electronic products.
Pin Connections
Pin
Function
Pin Dia
1
Vin+
0.040
’’
2
Remote On/Off
0
.040
’’
3
Vin
-
0.040
’’
4
Vout
-
0.062
’’
5
Sense
-
0.040
’’
6
Trim
0.040
’’
7
Sense+
0.040
’’
8
Vout+
0.062
’’