BEL 0RSB

ISOLATED DC/DC CONVERTERS
18 Vdc - 75 Vdc Input 3.3 Vdc /10 A Output, 1/16 Brick
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jun. 17, 2010
0RSB-40U03B
RoHS Compliant
Rev.A
Features
•
Isolated
•
Output Over-Voltage Shutdown
•
High Efficiency
•
Output Voltage Trim
•
High Power Density
•
OCP/SCP
•
Fixed Frequency (500 kHz)
•
Over Temperature Protection
•
Low Cost
•
Remote On/Off
•
Input Under-Voltage Lockout
•
Positive/Negative Remote Sense
•
Basic Insulation
•
Comply with ANSI T1.315
•
Class 1, Category 2, Non-Isolated DC/DC Converter (refer to IPC-9592)
•
UL60950-1 Recognized (UL/cUL) (Pending)
Applications
•
Networking
•
Computers and peripherals
•
Telecommunications
Description
The 0RSB-40U03B is an isolated dc/dc converter that operates from a nominal 24 Vdc or 48 Vdc source. This
unit will provide up to 33 W of output power from an 18-75 Vdc wide input range. This 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 sixteenth brick through hole package.
Part Selection
Output
Voltage
3.3 Vdc
Input Voltage
18 Vdc-75 Vdc
Max. Output
Current
10 A
Max. Output
Power
33 W
Typical
Efficiency
87.5%
Model Number
Active Low
0RSB-40U03B
Notes: Add “G” suffix at the end of the model number to indicate Tray Packaging.
Part Number Explanation
0 R SB – 40 U 03 B
1 2
3
4
5
6
7
1---Through hole
2---RoHS 6, change “R” to “7” means RoHS 5
3---Series name, 1/16 Brick
4---Series code
5---Input range 48V wide (18-75V)
6---Output voltage 3.3V
7---Option
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
1
ISOLATED DC/DC CONVERTERS
18 Vdc - 75 Vdc Input 3.3 Vdc /10 A Output, 1/16 Brick
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jun. 17, 2010
Absolute Maximum Ratings
Parameter
Continuous Input Voltage
Input Transient Voltage
Remote On/Off
I/O Isolation Voltage
Min
Typ
Max
Unit
-0.3
-
80
V
-
-
100
V
-0.3
-
18
V
-
-
1500
V
Notes
100 mS maximum
Ambient Temperature
-40
-
85
°C
Storage Temperature
-55
-
125
°C
Note: Ratings used beyond the maximum ratings may cause a reliability degradation of the converter or may
permanently damage the device.
Input Specifications
Parameter
Operating Input Voltage
Min
18
Typ
48
Max
75
Unit
V
Input Current (full load)
-
-
3.0
A
Input Current (no load)
-
60
120
mA
Remote Off Input Current
-
1
3
mA
Input Reflected Ripple Current
(rms)
-
3
7
mA
Input Reflected Ripple Current
(pk-pk)
-
20
50
mA
I t Inrush Current Transient
-
-
0.02
As
Turn-on Voltage Threshold
16.0
17.2
18.0
V
Turn-off Voltage Threshold
15.6
16.8
17.6
V
2
Notes
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.
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 3A on system board. Refer to the fuse
manufacture’s datasheet for further information.
Note: All specifications are typical at 25 °C unless otherwise stated.
Output Specifications
Parameter
Min
Typ
Max
Unit
3.25
3.3
3.35
V
Load Regulation
-
±4
±9
mV
Line Regulation
-
±3
±8
mV
Regulation Over Temperature
(-40deg.C-85deg.C)
-
±9
±16
mV
Ripple and Noise (pk-pk)
-
55
90
mV
Ripple and Noise (rms)
-
12
25
mV
Ripple and Noise (pk-pk)
under worst case
-
-
120
mV
Output Voltage Set Point
Notes
Vin=48V, Io=50% load
0-20 MHz BW, with a 1µF ceramic
capacitor and a 330uF Tantalum
cap at output.
over all operating input voltage,
load and temperature conditions.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
2
ISOLATED DC/DC CONVERTERS
18 Vdc - 75 Vdc Input 3.3 Vdc /10 A Output, 1/16 Brick
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jun. 17, 2010
Output Specifications (continued)
Parameter
Min
Typ
Max
Unit
Notes
Output Current Range
0
-
10
A
Output DC Current Limit
11
14
16
A
Short Circuit Surge Transient
-
-
1
As
Rise Time
-
10
15
mS
-
25
50
mS
Enable form Vin
-
25
50
mS
Enable form ON/OFF
-
0
5
%
330
-
4700
uF
2
Turn on Time
Overshoot at Turn on
Output Capacitance
Transient Response
△V50%~75% of
Overshoot
-
180
250
mV
Max Load
Settling Time
-
80
150
uS
△V75%~50% of
Overshoot
-
180
250
mV
Max Load
Settling Time
-
80
150
uS
di/dt=0.1A/us, Vin=48Vdc, Ta=25°C,
with a 1µF ceramic capacitor and a
330uF Tantalum cap at the output.
Notes: All specifications are typical at nominal input, full load at 25°C unless otherwise stated.
General Specifications
Parameter
Min
Typ
Max
Unit
85
87.5
-
%
-
500
-
kHz
2.97
-
3.63
V
Over Temperature Protection
-
125
130
°C
Over Voltage Protection(Static)
-
4
4.9
V
Weight
-
14
-
g
Efficiency
Switching Frequency
Output Voltage Trim Range
FIT
TBD
-
1.30 x 0.90 x 0.46
33.02 x 22.86 x 11.69
-
-
-
V
10M
-
-
3900
Notes
Vin=48V, full load
Calculated Per Bell Core SR-332
(Vin=48 V, Vo=3.3 V, Io=8 A, Ta = 25
9
°C, FIT=10 /MTBF)
Dimensions
Inches (L × W × H)
Millimeters (L × W × H)
Isolation characteristics
Input to Output
Isolation Resistance
Isolation Capacitance
1500
ohm
-
pF
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
3
ISOLATED DC/DC CONVERTERS
18 Vdc - 75 Vdc Input 3.3 Vdc /10 A Output, 1/16 Brick
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jun. 17, 2010
Efficiency Data
90%
85%
EFFICIENCY
80%
18V
24V
75%
70%
48V
75V
65%
60%
55%
50%
1
2.5
5
7.5
10
OUTPUT CURRENT (A)
Thermal Derating Curves
Maximum junction temperature of semiconductors derated to 120 degree C.
Top View
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
4
ISOLATED DC/DC CONVERTERS
18 Vdc - 75 Vdc Input 3.3 Vdc /10 A Output, 1/16 Brick
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jun. 17, 2010
Thermal Derating Curves (continued)
Derating curve under 24Vdc input
Derating curve under 48Vdc input
Temperature reference points on top side
Temperature reference points on bottom side
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
5
ISOLATED DC/DC CONVERTERS
18 Vdc - 75 Vdc Input 3.3 Vdc /10 A Output, 1/16 Brick
Jun. 17, 2010
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Ripple and Noise Waveform
48 Vdc input, 3.3Vdc/10A output
Note: Ripple and Noise at full load, Ta=25°C, with a 1µF ceramic capacitor and a 330uF Tantalum cap at the
output.
Transient Response Waveforms
75%-50% Load Transients
50%-75% Load Transients
Note: Transient Response at di/dt=0.1A/uS, Ta=25°C, with 1uF ceramic cap and 330uF tantalum cap at
output.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
6
ISOLATED DC/DC CONVERTERS
18 Vdc - 75 Vdc Input 3.3 Vdc /10 A Output, 1/16 Brick
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jun. 17, 2010
Startup & Shutdown
Rise Time
Test Condition:
48Vdc input, 3.3Vdc/10A
output, and Ta=25 deg C
Startup from on/off
Ch1: Vo
Ch2: on/off
Startup from Vin
Ch1: Vo
Ch2: Vin
Test Condition: 48Vdc input, 3.3Vdc/10A output
and Ta=25 deg C
Test Condition: 48Vdc input, 3.3Vdc/10A output
and Ta=25 deg C
Shutdown
Test Condition:
48Vdc input, 3.3Vdc/10A
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
7
ISOLATED DC/DC CONVERTERS
18 Vdc - 75 Vdc Input 3.3 Vdc /10 A Output, 1/16 Brick
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jun. 17, 2010
Remote On/Off
Parameter
Signal Low (Unit On)
Signal High (Unit Off)
Active Low
Current Sink
Min
-0.3
Typ
-
Max
0.8
Unit
V
2.4
-
18
V
0
-
1
mA
Notes
The remote on/off pin open, Unit off.
Recommended remote on/off circuit for active low
Vin+
Vin+
On/off
On/off
Vin-
Vin-
Control with open collector/drain circuit
Control with photocoupler circuit
Vin+
Vin+
On/off
On/off
Vin-
Vin-
Vcc
Control with logic circuit
Permanently on
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
8
ISOLATED DC/DC CONVERTERS
18 Vdc - 75 Vdc Input 3.3 Vdc /10 A Output, 1/16 Brick
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jun. 17, 2010
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.
Minimum trim down voltage is 2.97V
Maximum trim up voltage is 3.63V.
The total voltage increased by trim and remote sense should not exceed 10% of the nominal output voltage.
Vout
Rtrimdown =
511
− 10.22[kΩ ]
delta
Module
Trim
GND
Rtrimup =
Rtrimdown
Vout
(100 + delta ) ⋅ Vo ⋅ 5.11 − 626
− 10.22[kΩ]
1.225 ⋅ delta
Module
Trim
Rtrimup
GND
Note:
delta =
(Vo _ req − Vo ) × 100 [% ]
Vo
300
1500
270
1350
240
1200
Trim resistor value,Rtrim_up(KOhm)
Trim resistor value Rtrim_down(KOhm)
Vo_req=Desired (trimmed) output voltage [V]
Output voltage Vo=3.308 V
210
180
150
120
90
60
1050
900
750
600
450
300
150
30
0
2.64 2.71 2.77 2.84 2.9 2.97 3.04 3.1 3.17 3.23
Adjusted output voltage Vo,adj (V)
3.3
0
3.3
3.33 3.37
3.4 3.43 3.46 3.5 3.53 3.56
Adjusted output voltage Vo,adj(V)
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
3.6
3.63
9
ISOLATED DC/DC CONVERTERS
18 Vdc - 75 Vdc Input 3.3 Vdc /10 A Output, 1/16 Brick
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jun. 17, 2010
Remote Sense
This module has remote sense compensation feature. It can minimizes the effects of resistance between
moudle's output and load in system layout and facilitates accutate voltage regulation at load terminals or
other selected point.
1. The remote sense lines carries very little current and hence do not require a large cross-sectional area.
2. This module compensates for a maximum drop of 10% of the nominal output voltage.
3. If the unit is already trimmed up, the available remote sense compensation range should be
correspondingly reduced. The total voltage increased by trim and remote sense should not exceed 10%
of the nominal output voltage.
4. When using remote sense compensation, all the resistance, parasitic inductance and capacitance of the
system are incorpotated within the feedback loop of this module. The can make an effect on the
module's compensation, affecting the stability and dynamic response. A 0.1uF ceramic capacitor can be
connected at the point of load to de-couple noise on the sense wires.
5. Recommend the connection of remote sense compensation as below figure. There are a resistor RS+
(100 ohm) from Vo+ to Sense+ and a resistor RS- (51 ohm)) from Vo- to Sense- inside of this module.
RS+
Vo+
Sense+
Load
RS-
Sense-
V o-
6. If not using remote sense compensation, please connect sense directly to output at module's pin, that is,
connect sense+ to Vo+ and sense- to Vo- at module's pin, the shorter the better. See below figure.
RS+
V o+
Sense+
Load
RS-
Sense-
Vo-
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
10
ISOLATED DC/DC CONVERTERS
18 Vdc - 75 Vdc Input 3.3 Vdc /10 A Output, 1/16 Brick
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jun. 17, 2010
Over Current Protection
To provide protection in a fault output overload condition, the module is equipped with internal current-limiting
circuitry and can endure current limiting for a few mili-seconds. If the overcurrent condition persists beyond a few
milliseconds, the module will shut down into hiccup mode and restart once every 400mS. The module operates
normally when the output current goes into specified range. The typical average output current is 1A during
hiccup.
48Vin
24Vin
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
11
ISOLATED DC/DC CONVERTERS
18 Vdc - 75 Vdc Input 3.3 Vdc /10 A Output, 1/16 Brick
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jun. 17, 2010
Over Temperature Protection
The OTP is achieved by thermistor R65 and the threshold is set at 120C in non-latch mode; the hottest
component Q5 reaches 130C with 100LFM air flow correspondingly. It will restart automatically when the
temperature falls down to 110C. The protecting point will be varied a little under different conditions (air flow,
ambient temperature, input voltage, load...).
The hottest component on the top side: Q5
The thermistor on the bottom side: R65
Input Under-voltage Lockout
Input Current
Under-voltage Lockout
Voltage Falling
Voltage Rising
V1
V2
V1=16.8V
V2=17.2V
Input Voltage (V)
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
12
ISOLATED DC/DC CONVERTERS
18 Vdc - 75 Vdc Input 3.3 Vdc /10 A Output, 1/16 Brick
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jun. 17, 2010
Mechanical Outline
Pin Connections
Pin
1
Function
Vin+
Pin Size
0.040’’
2
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’’
Note: This module is recommended and compatible with Pb-Free Wave Soldering and must be soldered
using a peak solder temperature of no more than 260 ºC for less than 5 seconds.
Note:
1) All Pins: Material - Copper Alloy;
Finish – 3 micro inches minimum Gold over 50 micro inches minimum Nickel plate.
2) Undimensioned components are shown for visual reference only.
3) All dimensions in inches (mm); Tolerances: x.xx +/-0.02 in. (x.x +/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm).
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
13
ISOLATED DC/DC CONVERTERS
18 Vdc - 75 Vdc Input 3.3 Vdc /10 A Output, 1/16 Brick
Bel Power Inc., a subsidiary of Bel Fuse Inc.
Jun. 17, 2010
Revision History
Date
Revision
2010-6-17
A
Changes Detail
Approval
First release
JZ Wang
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. 061710
14
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