BEL 0RHW

ISOLATED DC/DC CONVERTERS
36 Vdc - 75 Vdc Input
1.2 Vdc /60 A, 3.3V/60A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Feb 10, 2010
0RHW-D0Txxx
RoHS Compliant
Rev.G
Features

Fixed Frequency

Output Over Voltage Protection

Isolated

Over Temperature Protection

High Efficiency

SCP/OCP

High Power Density

Low Cost

Input Under Voltage Protection

Remote On/Off

Basic Insulation
 Class 1, Category 2, Isolated DC/DC Converter (refer to IPC-9592)
 UL60950-1 Recognized (UL/cUL) (Pending)
Applications

Networking

Computers and peripherals

Telecommunications
Description
The 0RHW-D0Txxx series are isolated dc/dc converters that operate from a nominal 48 Vdc source. This
converter provides up to 200 W of output power. Features include remote on/off, short circuit protection, over
current protection, over-temperature protection, output over-voltage protection, input under-voltage protection.
This converter is provided in an industry standard half brick package that is easy to use and provides good
thermal performance.
Part Selection
Output
Voltage
1.2 Vdc
3.3 Vdc
Input Voltage
36 Vdc - 75 Vdc
Max. Output
Current
60 A
Max. Output
Power
72 W
Typical
Efficiency
86%
Model Number
Active High
0RHW-D0TV20
Model Number
Active Low
0RHW-D0TV2L
36 Vdc - 75 Vdc
60 A
200 W
92%
0RHW-D0T033
0RHW-D0T03L
Note: Add “G” suffix at the end of the model number to indicate Tray Packaging.
Part Number Explanation
0 R HW – D0 T V2 x
1 2
3
4
5
6
7
1---Through hole
2---RoHS 6, change “R” to “7” means RoHS 5
3---Series name, 1/2 Brick
4---Series code
5---Input range
6---Output voltage, “V2” mean 1.2Vout and “03” mean 3.3Vout
7---Option, “x” of the model part number to be 0-9, A-Z, which will represent the special request of
customer.
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
36 Vdc - 75 Vdc Input
1.2 Vdc /60 A, 3.3V/60A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Feb 10, 2010
Absolute Maximum Ratings
Parameter
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
Input Voltage (continuous)
Input Transient Voltage
Notes
100 mS maximum
Note: Ratings used beyond the maximum ratings may cause a reliability degradation of the converter or may
permanently damage the device.
Input Specifications
Parameter
Min
Typ
Max
36 V
48 V
75 V
Vo=1.2V
Vo=3.3V
-
50 mA
80 mA
100 mA
150 mA
Vo=1.2V
Vo=3.3V
-
-
2.7 A
8A
Remote Off Input Current
-
2 mA
5 mA
Input Reflected Ripple Current
(pk-pk)
-
10 mA
20 mA
Input Reflected Ripple Current
(rms)
-
2 mA
5 mA
I t Inrush Current Transient
-
-
1As
Turn-on Voltage Threshold
32 V
34 V
35 V
Turn-off Voltage Threshold
30 V
32 V
34 V
Input Voltage
Notes
Input Current (no load)
Input Current (full load)
2
With simulated source impedance of
10uH, 5Hz to 20MHz. Use a 100uF/100V
electrolytic capacitor with ESR=1 ohm
max, at [email protected]°C.
2
CAUTION: This converter is not internally fused. An input line fuse must be used in application.
Recommend a fast-acting fuse with maximum rating of [email protected] or [email protected] on system
board. Refer to the fuse manufacture’s datasheet for further information.
Notes: 1. This converter has internal C-L-C (0.47uF-2.2uH-4.4uF) filter.
2. 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
36 Vdc - 75 Vdc Input
1.2 Vdc /60 A, 3.3V/60A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Feb 10, 2010
Output Specifications
Parameter
Output Voltage Set Point
Min
Typ
Max
Notes
Vo=1.2V
Vo=3.3V
1.176 V
3.234 V
1.2 V
3.3 V
1.224 V
3.366 V
Vin=48 V, Io=50%Load
Vo=1.2V
Vo=3.3V
-
2 mV
5 mV
5 mV
10 mV
Vin=36-75 V, full load
Vo=1.2V
Vo=3.3V
-
5 mV
8 mV
10 mV
15 mV
Vin=48 V, Iout=0-60 A
Vo=1.2V
Vo=3.3V
-
-
10 mV
20 mV
Vin=48 V, Iout=0-60 A
Output Current
0A
-
60 A
Current Limit Threshold
Ripple and Noise (pk-pk)
65 A
75 A
85 A
Vo=1.2V
Vo=3.3V
-
60 mV
60 mV
100 mV
100 mV
Vo=1.2V
Vo=3.3V
-
15 mV
15 mV
30 mV
40 mV
Vo=1.2V
Vo=3.3V
-
-
150 mV
150 mV
Vo=1.2V
Vo=3.3V
0.5 mS
5 mS
-
5 mS
10 mS
Vo=1.2V
Vo=3.3V
-
30 mS
30 mS
50 mS
50 mS
-
-
3%
0
470
-
30,000 uF
20,000 uF
Line Regulation
Load Regulation
Regulation Over Temperature
(-40 C to 85 C)
Ripple and Noise (rms)
Ripple and Noise (pk-pk)
0-20MHz BW, with a 1µF
ceramic capacitor and a 10uF
Tantalum cap at output.
over all operating input voltage,
load and ambient temperature
condition
Rise Time
Turn on Time
Overshoot at Turn on
Enable form Vin and ON/OFF
Output Capacitance
Vo=1.2V
Vo=3.3V
Transient Response
50% ~ 75%
Max Load
75% ~ 50%
Max Load
50% ~ 75%
Max Load
75% ~ 50%
Max Load
Overshoot
-
60 mV
-
150 uS
200 uS
-
60 mV
120 mV
Settling Time
-
150 uS
200 uS
Overshoot
-
60 mV
120 mV
-
150 uS
200 uS
-
60 mV
120 mV
-
150 uS
200 uS
Settling Time
Overshoot
Settling Time
Overshoot
Settling Time
VO=1.2 V
VO=3.3 V
120 mV
di/dt=0.1A/us, Vin=48Vdc,
Ta=25 °C
Note: All specifications are typical at nominal input, full load 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
36 Vdc - 75 Vdc Input
1.2 Vdc /60 A, 3.3V/60A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Feb 10, 2010
General Specifications
Parameter
Min
Typ
Max
Vo=1.2V
Vo=3.3V
86%
90%
88%
92.5%
-
Vo=1.2V
Vo=3.3V
270 kHz
340 kHz
280 kHz
350 kHz
300 kHz
360 kHz
-
-
10%
80%
-
110%
-
120 ℃
130 ℃
Over Voltage Protection (Static)
Vo=1.2V
Vo=3.3V
1.35 V
3.5 V
-
1.7 V
5V
Over Voltage Protection
(Dynamic)
Vo=1.2V
Vo=3.3V
-
-
1.8 V
5.6 V
Notes
Efficiency
Vin=48 V, full load
Switching Frequency
Remote Sense Compensation
Output Voltage Trim Range
Over Temperature Protection
FIT
The voltage increased by trim and
sense should not exceed 110%Vout.
The transient over voltage must be
measured at Rtrimup≥5K
Calculated Per Bell Core SR-332
(Vin=48 V, Vo=1.2 V, Io=80%,Ta = 25
9
C, FIT=10 /MTBF)
634
Dimensions
Inches (L × W × H)
Millimeters (L × W × H)
2.28 x 2.40 x 0.50
57.91 x 60.96 x 12.70
Weight
-
93.5 g
-
Input to Output
-
-
1500 V
Input to Case
-
-
1500 V
Output to Case
-
-
500 V
10M ohm
-
-
1500 pF
Isolation characteristics
Isolation Resistance
Isolation Capacitance
-
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)
Signal High (Unit On)
Active Low
Active High
Min
Typ
Max
-0.3 V
-
0.8 V
2.4 V
-
18 V
-0.3 V
-
0.8 V
2.4 V
-
18 V
0 mA
-
1 mA
Notes
The Remote On/Off pin is open,
Unit off.
The Remote On/Off pin is 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
36 Vdc - 75 Vdc Input
1.2 Vdc /60 A, 3.3V/60A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Feb 10, 2010
Output Trim Equations
For 1.2V Model
Equations for calculating the trim resistor are shown below. The Trim Down resistor should be connected the
Trim pin, Sense(-) pin and GND pin. The Trim Up resistor should be connected the Trim pin Sense(+) pin and
Vout pin. Only one of the resistors should be used for any given application.
Rtrimup 
5.1 Vo(100  delta) 510

 6.1k
0.6  delta
delta
Rtrimdown 
Vout
+sense
Rtrim_up
Trim
-sense
GND
510
 6.1k
delta
Vout
+sense
Trim
Note:
delta 
Rtrim_down
Vadj  Vo   100%
-sense
GND
Vo
Output voltage Vo=1.201 [email protected]=0
For 3.3V Model
Equations for calculating the trim resistor are shown below. The Trim Down resistor should be connected the
Trim pin and GND pin. The Trim Up resistor should be connected the Trim pin and Vout pin. Only one of the
resistors should be used for any given application.
100  %  V0  100  2  % k
R

trimup
1.225  %
%
Vout
+sense
Rtrim_up
Trim
-sense
GND
100
R

 2 [k]
trimdown %
Vout
+sense
Trim
Note:
V  Vo
%  DES
100
Vo
Rtrim_down
-sense
GND
Vo_req=Desired(trimmed) output voltage[V]
Output voltage Vo=3.3V
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
36 Vdc - 75 Vdc Input
1.2 Vdc /60 A, 3.3V/60A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Feb 10, 2010
95.0%
95.0%
90.0%
90.0%
36 V
85.0%
48 V
80.0%
75 V
85.0%
36 V
80.0%
48 V
75 V
75.0%
75.0%
70.0%
6.00
EFFICIENCY
EFFICIENCY
Efficiency Data
15.00
30.00
45.00
60.00
70.0%
6.00
15.00
30.00
45.00
OUTPUT CURRENT(A)
OUTPUT CURRENT(A)
Vo=1.2 V
Vo=3.3 V
60.00
Thermal Derating Curves
Vo=1.2V
Vo=3.3V
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
36 Vdc - 75 Vdc Input
1.2 Vdc /60 A, 3.3V/60A Outputs
Feb 10, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Thermal Derating Curves (continued)
Temperature reference points on top side
Temperature reference points on bottom side
Ripple and Noise Waveform
Ripple and noise at 48 V input, 1.2 V output
Note:
Ripple and noise at 48 V input, 3.3 V output
Output ripple and noise at full load, 0-20MHz BW, with 10 uF/10 V Tan Cap and 1uF/50V 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
36 Vdc - 75 Vdc Input
1.2 Vdc /60 A, 3.3V/60A Outputs
Feb 10, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Transient Response Waveforms
50%-75% Load Transients at Vin=48 V, Vo=1.2 V
75%-50% Load Transients at Vin=48 V, Vo=1.2 V
50%-75% Load Transients at Vin=48 V, Vo=3.3 V
75%-50% Load Transients at Vin=48 V, Vo=3.3 V
Note: Transient response at di/dt=0.1A/uS, with 10uF/10V Tan cap and 1uF/50V 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
36 Vdc - 75 Vdc Input
1.2 Vdc /60 A, 3.3V/60A Outputs
Feb 10, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Start Up
Rise Time
Vin=48V, Vo=3.3V, Io=60A
Vin=48V, Vo=1.2V, Io=60A
Startup time
Startup from Vin
Ch1: Vo, Ch3: Vin
Vin=48V, Vo=3.3V, Io=60A
Startup from Vin
Ch1: Vo, Ch3: Vin
Vin=48V, Vo=1.2V, Io=60A
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
36 Vdc - 75 Vdc Input
1.2 Vdc /60 A, 3.3V/60A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Feb 10, 2010
Safety & EMC
Safety
1. Material flammability
2. UL Certification
UL94V-0
UL60950-1
EMC
1. Surge
IEC61000-4-5
2. DC-DIP
IEC61000-4-29
3. Conductive EMI
EN55022 class A
Compliance to EN55022 class A (both q.peak and average) with the following inductive and capacitive filter
VCC
RTN
L1
+
C7
Load
+
C6
C2 C3
DC/DC
-48V
? ?
C1
GND
C4
C5
GND
Item
Designator
Parameter
Vendor
Vendor P/N
1
C1
1uF/100V,ceramic
Murata
GRM32ER72A105KA01L
2
C2
0.1uF/100V, ceramic
TDK
C3216X7R2A104K
3
C3
100uF/100V, AL cap
Nichicon
UVZ2A101MPD
4
C4
100nF/1000V,ceramic
Johanson
102S47W104KV4
5
C5
100nF/1000V,ceramic
Johanson
102S47W104KV4
6
C6
N/A
7
C7
1uF/100V,ceramic
Murata
GRM32ER72A105KA01L
8
T1
1.3mH, common mode
Pulse
P0402NL
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
36 Vdc - 75 Vdc Input
1.2 Vdc /60 A, 3.3V/60A Outputs
Feb 10, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Safety & EMC (continued)
Positive: Vo=1.2V
Negative: Vo=1.2V
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
36 Vdc - 75 Vdc Input
1.2 Vdc /60 A, 3.3V/60A Outputs
Feb 10, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Safety & EMC (continued)
Positive: Vo=3.3V
Negative: Vo=3.3V
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
36 Vdc - 75 Vdc Input
Feb 10, 2010
1.2 Vdc /60 A, 3.3V/60A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Mechanical Outline
Pin Connections
Pin
Function
Pin Size
1
2
3
4
5
6
7
8
9
Vin(+)
CNT
NC
Vin(-)
Vo(-)
Sense(-)
Trim
Sense(+)
Vo(+)
0.040’’
0.040’’
0.040’’
0.080’’
0.040’’
0.040’’
0.040’’
0.080’’
Notes: 1. Pin 6 must be connected to Vo(-).
2. Pin 8 must be connected to Vo(+).
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
36 Vdc - 75 Vdc Input
1.2 Vdc /60 A, 3.3V/60A Outputs
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Feb.10, 2010
Revision History
Date
Revision
Changes Detail
Approval
2009-12-17
F
1. Update to Bel new datasheet version, add part number
explanation, start-up, safety and so on; 2. add 1.2Vout spec
YP/Falling
2010-1-29
G
1. Update thermal derating curve for 3.3Vout.
YP/Falling
2010-2-10
H
1. Update thermal derating curve for 1.2Vout. Chang the figure of air
direction
YP/Falling
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and
other hazardous substances from electronic products.
2010 Bel Fuse Inc. Specifications subject to change without notice. 012910
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