BEL SLIN

NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
SLIN-03E1Ax
RoHS Compliant
Rev.D
Features
•
Wide Input Voltage Range
•
Ability to Sink and Source Current
•
Fixed Switching Frequency
•
Cost Efficient Open Frame Design
•
Power Good Signal
•
Over Temperature Protection
•
Remote Sense
•
Output Over Current Protection
•
Remote On/Off
•
Tunable LoopTM (a registered trademark of Lineage Power Systems) to
Optimize Dynamic output voltage response
•
Flexible output voltage sequencing
•
Class 1, Category 2, Non-Isolated DC/DC Converter (refer to IPC-9592)
•
Compliant to RoHS EU Directive 2002/95/EC
•
Compatible in a Pb-free or SnPb reflow environment
•
UL* 60950-1Recognized, CSA† C22.2 No. 60950-1-03 Certified
•
VDE‡ 0805:2001-12 (EN60950-1) Licensed
Applications
•
•
•
Distributed power architectures
Intermediate bus voltage applications
Telecommunications equipment
•
•
•
Servers and storage applications
Networking equipment
Industrial equipment
Description
The SLIN-03E1Ax power modules are non-isolated dc-dc converters that can deliver up to 3A of output current.
These modules operate over a wide range of input voltage (VIN = 4.5Vdc-14Vdc) and provide a precisely
regulated output voltage from 0.59Vdc to 5.5Vdc, programmable via an external resistor. Features include
remote On/Off, adjustable output voltage, over current and over temperature protection, and output voltage
sequencing. A new feature, the Tunable LoopTM, allows the user to optimize the dynamic response of the
converter to match the load with reduced amount of output capacitance leading to savings on cost and PWB
area.
Part Selection
Output Voltage
Input Voltage
0.59 Vdc - 5.5 Vdc
4.5 Vdc - 14 Vdc
Max. Output
Current
3A
Typical
Efficiency
91%
Model Number
Active High
SLIN-03E1A0
Model Number
Active Low
SLIN-03E1AL
Notes: Add “G” suffix at the end of the model number to indicate Tray Packaging.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
1
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
Part Number Explanation
S LIN – 03 E 1A 0
1
2
3
4
5
6
1---Surface mount
2---Series code
3---Output current (3A)
4--- Wide input voltage range (4.5-14V)
5--- Wide output voltage range (0.59-5.5V)
6--- Enable, active high, change “0” to “L” means active low
Absolute Maximum Ratings
Min
Typ
Max
Unit
Continuous Input Voltage
-0.3
-
15
V
Sequencing Voltage
-0.3
-
Vin
V
Operating Ambient Temperature
-40
-
85
°C
Storage Temperature
-55
-
125
°C
Parameter
Notes
Note: Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These
are absolute stress ratings only, functional operation of the device is not implied at these or any other
conditions in excess of those given in the operations sections of the data sheet. Exposure to absolute
maximum ratings for extended periods can adversely affect the device reliability.
Input Specifications
Parameter
Operating Input Voltage
Min
4.5
Typ
-
Max
14
Unit
V
Notes
Input Current (full load)
-
-
3.5
A
-
17
55
-
mA
mA
VIN=12V, module enabled
Input Stand-by Current
-
1
-
mA
VIN = 12.0Vdc, module disabled
Input Reflected Ripple Current
(pk-pk)
-
43
-
mA
5Hz to 20MHz, 1μH source
impedance; VIN =0 to 14V, IO= IOmax ;
See Test Configurations
I2t Inrush Current Transient
-
-
1
A2s
Input Ripple Rejection (120Hz)
-
50
-
dB
Turn-on Threshold
-
-
4.0
V
Turn-off Threshold
3.6
-
-
V
Hysteresis
0.4
-
-
V
VIN=4.5V to 14V
Input Current (no load)
Vo=0.6V
Vo=3.3V
CAUTION: This converter is not internally fused. An input line fuse must be used in application.
This power module can be used in a wide variety of applications, ranging from simple standalone operation to
an integrated part of sophisticated power architecture. To preserve maximum flexibility, internal fusing is not
included; however, to achieve maximum safety and system protection, always use an input line fuse. The
safety agencies require a fast-acting fuse with a maximum rating of 5A. Based on the information provided in
this data sheet on inrush energy and maximum dc input current, the same type of fuse with a lower rating can
be used. Refer to the fuse manufacturer’s data sheet for further information.
Note: Unless otherwise indicated, specifications apply over all operating input voltage, resistive 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
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
Output Specifications
Parameter
Min
Typ
Max
Unit
Output Voltage Set Point
-1.5
-
+1.5
%Vo,set
Output Voltage
-3.0
-
+3.0
%Vo,set
Adjustment Range1
0.59
-
5.5
V
-
-
0.5
V
VO ≥ 2.5V
VO < 2.5V
-
-
10
5
mV
mV
VO ≥ 2.5V
VO < 2.5V
-
-
0.4
10
%Vo,set
mV
Temperature Regulation
(-40°C to +85°C)
-
-
0.4
%Vo,set
Ripple and Noise (pk-pk)
-
50
110
mV
Ripple and Noise (rms)
-
20
40
mV
Output Current Range
0
-
3
A
Output DC Current Limit
-
-
200
%Io,max
Output Short-Circuit Current
-
-
6.7
mA
Vo≤250mV, Hiccup Mode
Output Capacitance2
ESR≥ 1 mΩ
ESR≥0.15 mΩ
ESR≥ 10 mΩ
0
0
0
-
47
1000
3000
uF
uF
uF
-
2
-
mS
-
2
-
mS
Without the Tunable LoopTM
TM
With the Tunable Loop
With the Tunable LoopTM
Case 1: On/Off input is enabled and then
input power is applied (delay from instant
at which VIN = VIN, min until Vo =10% of
Vo, set)
Case 2: Input power is applied for at least
one second and then the On/Off input is
enabled (delay from instant at which
Von/Off is enabled until Vo =10% of Vo,
set)
Output voltage Rise time
-
4
-
mS
Output voltage overshoot
-
-
3
%Vo,set
Remote Sense Range
Notes
with 0.5% tolerance for external resistor
used to set output voltage
Over all operating input voltage, resistive
load, and temperature conditions until end
of life
selected by an external resistor
Load Regulation
IO=IO, min to IO, max
Line Regulation
Turn-On Delay Time
VIN=VIN, min to VIN, max
5Hz to 20MHz BW, VIN=VIN, nom and IO=IO,
min to IO, max Co = 0.1μF // 10 μF ceramic
capacitors)
in either sink or source mode
Hiccup Mode
time for Vo to rise from 10% of Vo, set to
90% of Vo, set
Vin=Vin, min to Vin, max, Io=Io, min to Io,
max, With or without maximum external
capacitance
Dynamic Load Response
△V50%~100%
of Max Load
△V100%~50%
of Max Load
Peak Deviation
-
220
-
mV
Settling Time
-
60
-
uS
Peak Deviation
-
240
-
mV
Settling Time
-
60
-
uS
di/dt=10A/us, Vin=Vin,nom, Vo=1.8V,
Ta=25°C, Co=0
Notes: 1. Some output voltages may not be possible depending on the input voltage.
2. External capacitors may require using the new Tunable LoopTM feature to ensure that the module is
stable as well as getting the best transient response (See the Tunable LoopTM section for details).
3. Unless otherwise indicated, specifications apply over all operating input voltage, resistive 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
3
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
General Specifications
Parameter
Min
Typ
Max
Unit
-
73.3
82.9
86.5
88.9
90.6
92.6
-
%
%
%
%
%
%
Switching Frequency
-
600
-
kHz
Over Temperature Protection
-
140
-
°C
-
-
100
100
mV
mV
90
-
7
110
50
%Vo,set
Ω
-
1.55
-
g
Notes
Efficiency
Vo=0.59V
Vo=1.2V
Vo=1.8V
Vo=2.5V
Vo=3.3V
Vo=5.0V
Tracking Accuracy
Power-Up: 2V/ms
Power-Down: 2V/ms
PGOOD (Power Good)
Output Voltage Limit for PGOOD
Pulldown resistance of PGOOD pin
Weight
MTBF
15,694,689
hours
0.48 x 0.48 x 0.246
12.19 x 12.19 x 6.25
-
Vin= 12Vdc, Ta=25°C
Io=Io, max , Vo= Vo,set
Vin, min to Vin, max; Io, min to Io,
max, Vseq < Vo
Signal Interface Open Drain,
Vsupply ≤ 5Vdc
Calculated Per Bell Core SR-332
(Io=0.8Io, max, Ta=40°C,
Telecordia Issue 2 Method 1 Case
3)
Dimensions
Inches (L × W × H)
Millimeters (L × W × H)
Note: Unless otherwise indicated, specifications apply over all operating input voltage, resistive 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
4
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
Efficiency Data
85
90
85
EFFICIENCY, η (%)
EFFICIENCY, η (%)
80
75
Vin=4.5V
70
65
Vin=12V
Vin=14V
60
55
Vin=4.5V
80
Vin=14V
Vin=12V
75
70
65
0
0.5
1
1.5
2
2.5
3
0
0.5
OUTPUT CURRENT, IO (A)
95
95
90
90
EFFICIENCY, η (%)
EFFICIENCY, η (%))
2
2.5
3
Vo=1.2V
85
Vin=4.5V
Vin=14V
Vin=12V
75
70
Vin=4.5V
85
Vin=14V
Vin=12V
80
75
70
0
0.5
1
1.5
2
2.5
3
0
0.5
OUTPUT CURRENT, IO (A)
95
95
EFFICIENCY, η (%)
100
90
Vin=4.5V
Vin=14V
Vin=12V
80
1.5
2
2.5
3
Vo=2.5V
100
85
1
OUTPUT CURRENT, IO (A)
Vo=1.8V
EFFICIENCY, η (%))
1.5
OUTPUT CURRENT, IO (A)
Vo=0.6V
80
1
75
70
90
Vin=14V
85
Vin=8V
Vin=12V
80
75
70
0
0.5
1
1.5
2
OUTPUT CURRENT, IO (A)
Vo=3.3V
2.5
3
0
0.5
1
1.5
2
2.5
3
OUTPUT CURRENT, IO (A)
Vo=5.0V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
5
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
Thermal Derating Curves
4
OUTPUT CURRENT, Io (A)
OUTPUT CURRENT, Io (A)
4
3
NC
2
1
20
30
40
50
60
70
80
3
NC
2
1
90
20
30
O
40
70
80
90
AMBIENT TEMPERATURE, TA C
Vo=0.6V
Vo=1.2V
4
OUTPUT CURRENT, Io (A)
4
OUTPUT CURRENT, Io (A)
60
O
AMBIENT TEMPERATURE, TA C
3
NC
2
1
20
30
40
50
60
70
80
3
0.5m/s
(100LFM)
NC
2
1
20
90
30
O
40
50
60
70
80
90
80
90
O
AMBIENT TEMPERATURE, TA C
AMBIENT TEMPERATURE, TA C
Vo=1.8V
Vo=2.5V
4
OUTPUT CURRENT, Io (A)
4
OUTPUT CURRENT, Io (A)
50
3
0.5m/s
(100LFM)
NC
2
1
20
30
40
50
60
70
80
O
AMBIENT TEMPERATURE, TA C
Vo=3.3V
90
3
0.5m/s
(100LFM)
2
NC
1
20
30
40
50
60
70
O
AMBIENT TEMPERATURE, TA C
Vo=5.0V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
6
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
OUTPUT VOLTAGE
VO (V) (10mV/div)
OUTPUT VOLTAGE
VO (V) (10mV/div)
Ripple and Noise Waveforms
TIME, t (1μs/div)
TIME, t (1μs/div)
Vin=12V, Vo=1.2V, Io = Io,max
OUTPUT VOLTAGE
VO (V) (10mV/div)
OUTPUT VOLTAGE
VO (V) (10mV/div)
Vin=12V, Vo=0.6V, Io = Io,max
TIME, t (1μs/div)
TIME, t (1μs/div)
Vin=12V, Vo=2.5V, Io = Io,max
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT VOLTAGE
VO (V) (10mV/div)
Vin=12V, Vo=1.8V, Io = Io,max
TIME, t (1μs/div)
Vin=12V, Vo=3.3V, Io = Io,max
TIME, t (1μs/div)
Vin=12V, Vo=5.0V, Io = Io,max
.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
7
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
OUTPUT VOLTAGE
VO (V) (100mV/div)
TIME, t (20μs /div)
OUTPUT VOLTAGE
VO (V) (100mV/div)
Transient Response to Dynamic Load Change from
0% to 50% to 0%. Vo=1.2V
TIME, t (20μs /div)
Transient Response to Dynamic Load Change from
0% to 50% to 0%. Vo=2.5V
OUTPUT VOLTAGE
VO (V) (200mV/div)
OUTPUT VOLTAGE
VO (V) (200mV/div)
OUTPUT CURRENT,
IO (A) (1Adiv)
OUTPUT VOLTAGE
VO (V) (100mV/div)
OUTPUT CURRENT,
IO (A) (1Adiv)
TIME, t (20μs /div)
Transient Response to Dynamic Load Change from
0% to 50% to 0%. Vo=1.8V
OUTPUT CURRENT,
IO (A) (1Adiv)
OUTPUT CURRENT,
IO (A) (1Adiv)
TIME, t (20μs /div)
Transient Response to Dynamic Load Change from
0% to 50% to 0%. Vo=0.6V
TIME, t (20μs /div)
Transient Response to Dynamic Load Change from
0% to 50% to 0%. Vo=3.3V
OUTPUT CURRENT,
IO (A) (1Adiv)
OUTPUT CURRENT,
IO (A) (1Adiv)
OUTPUT VOLTAGE
VO (V) (100mV/div)
Transient Response Waveforms
TIME, t (20μs /div)
Transient Response to Dynamic Load Change from
0% to 50% to 0%. Vo=5.0V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
8
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
ON/OFF VOLTAGE OUTPUT VOLTAGE
VON/OFF (V) (10V/div) VO (V) (500mV/div)
Start-up Using On/Off Voltage (Io = Io,max), Vo=0.6V
TIME, t (2 ms/div)
ON/OFF VOLTAGE OUTPUT VOLTAGE
VO (V) (1V/div)
VON/OFF (V) (5V/div)
Start-up Using On/Off Voltage (Io = Io,max), Vo=1.8V
TIME, t (2 ms/div)
Start-up Using On/Off Voltage (Io = Io,max), Vo=3.3V
ON/OFF VOLTAGE OUTPUT VOLTAGE
VO (V) (500mV/div)
VON/OFF (V) (2V/div)
TIME, t (2 ms/div)
Start-up Using On/Off Voltage (Io = Io,max), Vo=1.2V
ON/OFF VOLTAGE OUTPUT VOLTAGE
VO (V) (1V/div)
VON/OFF (V) (5V/div)
TIME, t (2 ms/div)
TIME, t (2 ms/div)
Start-up Using On/Off Voltage (Io = Io,max), Vo=2.5V
ON/OFF VOLTAGE OUTPUT VOLTAGE
VO (V) (2V/div)
VON/OFF (V) (2V/div)
ON/OFF VOLTAGE OUTPUT VOLTAGE
VO (V) (200mV/div)
VON/OFF (V) (5V/div)
Startup Time
TIME, t (2 ms/div)
Start-up Using On/Off Voltage (Io = Io,max), Vo=5.0V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
9
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
INPUT VOLTAGE
VIN (V) (5V/div)
OUTPUT VOLTAGE
VO (V) (500mV/div)
Start-up Using Input Voltage (VIN = 12V, Io = Io,max ),
Vo=0.6V
TIME, t (2 ms/div)
INPUT VOLTAGE
OUTPUT VOLTAGE
VO (V) (1V/div)
VIN (V) (5V/div)
Start-up Using Input Voltage (VIN = 12V, Io = Io,max ),
Vo=1.8V
TIME, t (2 ms/div)
Start-up Using Input Voltage (VIN = 12V, Io = Io,max ),
Vo=3.3V
INPUT VOLTAGE
OUTPUT VOLTAGE
VO (V) (500mV/div)
VIN (V) (5V/div)
TIME, t (2 ms/div)
Start-up Using Input Voltage (VIN = 12V, Io = Io,max ),
Vo=1.2V
I INPUT VOLTAGE
OUTPUT VOLTAGE
VO (V) (1V/div)
VIN (V) (5V/div)
TIME, t (2 ms/div)
TIME, t (2 ms/div)
Start-up Using Input Voltage (VIN = 12V, Io = Io,max ),
Vo=2.5V
INPUT VOLTAGE
OUTPUT VOLTAGE
VO (V) (2V/div)
VIN (V) (5V/div)
INPUT VOLTAGE
VIN (V) (5V/div)
OUTPUT VOLTAGE
VO (V) (200mV/div)
Startup Time (continued)
TIME, t (2 ms/div)
Start-up Using Input Voltage (VIN = 12V, Io = Io,max ),
Vo=5.0V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
10
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
Test Configurations
Input Reflected Ripple Current Test Setup.
CURRENT PROBE
TO OSCILLOSCOPE
LTEST
VIN(+)
BATTERY
1μH
CIN
CS 1000μF
Electrolytic
2x100μF
Tantalum
E.S.R.<0.1Ω
@ 20°C 100kHz
COM
NOTE: Measure input reflected ripple current with a simulated
source inductance (LTEST) of 1μH. Capacitor CS offsets
possible battery impedance. Measure current as shown
above.
Output Ripple and Noise Test Setup
COPPER STRIP
RESISTIVE
LOAD
Vo+
0.1uF
10uF
COM
SCOPE USING
BNC SOCKET
GROUND PLANE
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
Output Voltage and Efficiency Test Setup
Rdistribution
Rcontact
Rcontact
VIN(+)
RLOAD
VO
VIN
Rdistribution
Rcontact
Rcontact
COM
Rdistribution
VO
Rdistribution
COM
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
VO. IO
Efficiency
η =
VIN. IIN
x
100 %
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
11
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
Input Filtering
The SLIN-03E1Ax module should be connected to a low ac-impedance source. A highly inductive source can
affect the stability of the module. Input capacitance must be placed directly adjacent to the input pin of the
module, to minimize input ripple voltage and ensure module stability.
To minimize input voltage ripple, ceramic capacitors are recommended at the input of the module. Below figure
shows the input ripple voltage for various output voltages at 3A of load current with 1x10 µF or 1x22 µF ceramic
capacitors and an input of 12V.
Input Ripple Voltage (mVp-p)
250
1x10uF
200
1x22uF
150
100
50
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Output Voltage (Vdc)
Output Filtering
The SLIN-03E1Ax modules are designed for low output ripple voltage and will meet the maximum output ripple
specification with 0.1 µF ceramic and 10 µF ceramic capacitors at the output of the module. However, additional
output filtering may be required by the system designer for a number of reasons. First, there may be a need to
further reduce the output ripple and noise of the module. Second, the dynamic response characteristics may
need to be customized to a particular load step change.
To reduce the output ripple and improve the dynamic response to a step load change, additional capacitance at
the output can be used. Low ESR polymer and ceramic capacitors are recommended to improve the dynamic
response of the module. The figure on the next page provides output ripple information for different external
capacitance values at various Vo and for a load current of 3A. For stable operation of the module, limit the
capacitance to less than the maximum output capacitance as specified in the electrical specification table.
Optimal performance of the module can be achieved by using the Tunable LoopTM feature described later in this
data sheet.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
12
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
Output Filtering (continued)
110
100
90
80
70
60
50
40
30
20
10
0
Ripple(mVp-p)
1x10uF External Cap
1x47uF External Cap
2x47uF External cap
4x47uF External Cap
0.5
1.5
2.5
3.5
Output Voltage(Volts)
4.5
5.5
Note: Output ripple voltage for various output voltages with external 1x10 µF, 1x47 µF, 2x47 µF or 4x47 µF
ceramic capacitors at the output (3A load). Input voltage is 12V.
Safety Considerations
For safety agency approval the power module must be installed in compliance with the spacing and separation
requirements of the end-use safety agency standards, i.e., UL 60950-1, CSA C22.2 No. 60950-1-03, and VDE
0850:2001-12 (EN60950-1) Licensed.
For the converter output to be considered meeting the requirements of safety extra-low voltage (SELV), the
input must meet SELV requirements. The power module has extra-low voltage (ELV) outputs when all inputs
are ELV.
The input to these units is to be provided with a fast-acting fuse with a maximum rating of 6A in the positive
input lead.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
13
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
Remote On/Off
Parameter
Signal Low (Unit On)
Signal High (Unit Off)
Signal Low (Unit Off)
Signal High (Unit On)
Active Low
Active High
Min
-0.2
Typ
-
Max
0.3
Unit
V
3.5
-
Vin,max
V
-0.3
-
0.8
V
3.5
-
Vin,max
V
Notes
The remote on/off pin open, Unit off.
The remote on/off pin open, Unit on.
The SLIN-03E1Ax modules feature an On/Off pin for remote On/Off operation. Two On/Off logic options are
available. In the Positive Logic On/Off option, the module turns ON during a logic High on the On/Off pin and
turns OFF during a logic Low. With the Negative Logic On/Off option, the module turns OFF during logic High
and ON during logic Low. The On/Off signal is always referenced to ground. For either On/Off logic option,
leaving the On/Off pin disconnected will turn the module ON when input voltage is present.
For positive logic modules, the circuit configuration for using the On/Off pin is shown in below figure. When the
external transistor Q1 is in the OFF state, the internal PWM Enable signal is pulled high through an internal
1.5MΩ resistor and the external pullup resistor and the module is ON. When transistor Q1 is turned ON, the
On/Off pin is pulled low and the module is OFF. A suggested value for Rpullup is 20kΩ.
VIN+
MODULE
Rpullup
1.5MEG
I ON/OFF
+
ON/OFF
20K
PWM Enable
VON/OFF
Q1
GND
_
Circuit configuration for using positive On/Off logic
For negative logic On/Off modules, the circuit configuration is shown below. The On/Off pin should be pulled
high with an external pull-up resistor (suggested value for the 4.5V to 14V input range is 20Kohms). When
transistor Q2 is in the OFF state, the On/Off pin is pulled high, transistor Q1 is turned ON and the module is
OFF. To turn the module ON, Q2 is turned ON pulling the On/Off pin low, turning transistor Q1 OFF resulting in
the PWM Enable pin going high.
VIN+
MODULE
Rpullup1
1.5MEG
I ON/OFF
ON/OFF
+
VON/OFF
22K
Q2
GND
22K
PWM Enable
Q1
_
Circuit configuration for using negative On/Off logic
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
14
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
Over Current Protection
To provide protection in a fault (output overload) condition, the unit is equipped with internal current-limiting
circuitry and can endure current limiting continuously. At the point of current-limit inception, the unit enters
hiccup mode. The unit operates normally once the output current is brought back into its specified range.
Over Temperature Protection
To provide protection in a fault condition, the unit is equipped with a thermal shutdown circuit. The unit will
shutdown if the over temperature threshold of 140°C is exceeded at the thermal reference point Tref. The
thermal shutdown is not intended as a guarantee that the unit will survive temperatures beyond its rating. Once
the unit goes into thermal shutdown it will then wait to cool before attempting to restart.
Input Under-voltage Lockout
At input voltages below the input under voltage lockout limit, the module operation is disabled. The module will
begin to operate at an input voltage above the under voltage lockout turn-on threshold.
Output Voltage Programming
The output voltage of the SLIN-03E1Ax module can be programmed to any voltage from 0.59dc to 5.5Vdc by
connecting a resistor between the Trim and GND pins of the module. Certain restrictions apply on the output
voltage set point depending on the input voltage. These are shown in the Output Voltage vs. Input Voltage Set
Point Area plot below. The Upper Limit curve shows that for output voltages of 0.9V and lower, the input voltage
must be lower than the maximum of 14V. The Lower Limit curve shows that for output voltages of 3.8V and
higher, the input voltage needs to be larger than the minimum of 4.5V.
16
Input Voltage (v)
14
12
Upper Limit
10
8
6
4
Lower Limit
2
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
Output Voltage (V)
Output Voltage vs. Input Voltage Set Point Area plot showing limits where the output voltage can be set for
different input voltages.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
15
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
Output Trim Equations
Without an external resistor between Trim and GND pins, the output of the module will be 0.59Vdc. To calculate
the value of the trim resistor, Rtrim, for a desired output voltage, use the following equation:
⎡
⎤
5.91
Rtrim = ⎢
⎥ kΩ
(
)
Vo
−
0
.
591
⎣
⎦
Rtrim is the external resistor in kΩ
Vo is the desired output voltage.
Table 1 provides Rtrim values required for some common output voltages.
Table 1
VO, set (V)
0.6
1.0
1.2
1.5
1.8
2.5
3.3
5.0
Rtrim
(KΩ)
656.7
14.45
9.704
6.502
4.888
3.096
2.182
1.340
By using a ±0.5% tolerance trim resistor with a TC of ±100ppm, a set point tolerance of ±1.5% can be achieved
as specified in the electrical specification.
Remote Sense
The SLIN-03E1Ax modules have a Remote Sense feature to minimize the effects of distribution losses by
regulating the voltage at the SENSE pin. The voltage between the SENSE pin and VOUT pin must not exceed
0.5V. Note that the output voltage of the module cannot exceed the specified maximum value. This includes the
voltage drop between the SENSE and Vout pins. When the Remote Sense feature is not being used, connect
the SENSE pin to the VOUT pin.
V IN(+)
VO (+)
SENSE
ON/OFF
LOAD
TRIM
R tri m
GND
Circuit configuration for programming output voltage using an external resistor
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
16
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
Voltage Margining
Output voltage margining can be implemented in the SLIN-03E1Ax modules by connecting a resistor, Rmargin-up,
from the Trim pin to the ground pin for margining-up the output voltage and by connecting a resistor, Rmargin-down,
from the Trim pin to output pin for margining-down.
Vo
Rmargin-down
MODULE
Q2
Trim
Rmargin-up
Rtrim
Q1
GND
Circuit Configuration for margining Output voltage
Monotonic Start-up and Shutdown
The SLIN-03E1Ax modules have monotonic start-up and shutdown behavior for any combination of rated input
voltage, output current and operating temperature range.
Startup into Pre-biased Output
The SLIN-03E1Ax modules can start into a prebiased output as long as the prebias voltage is 0.5V less than the
set output voltage. Note that prebias operation is not supported when output voltage sequencing is used.
Output Voltage Sequencing
The SLIN-03E1Ax modules include a sequencing feature that enables users to implement various types of
output voltage sequencing in their applications. This is accomplished via an additional sequencing pin. When
not using the sequencing feature, either tie the SEQ pin to VIN or leave it unconnected.
When an analog voltage is applied to the SEQ pin, the output voltage tracks this voltage until the output reaches
the set-point voltage. The final value of the SEQ voltage must be set higher than the set-point voltage of the
module. The output voltage follows the voltage on the SEQ pin on a one-to-one volt basis. By connecting
multiple modules together, multiple modules can track their output voltages to the voltage applied on the SEQ
pin.
For proper voltage sequencing, first, input voltage is applied to the module. The On/Off pin of the module is left
unconnected (or tied to GND for negative logic modules or tied to VIN for positive logic modules) so that the
module is ON by default.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
17
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
Output Voltage Sequencing (continued)
After applying input voltage to the module, a minimum 10msec delay is required before applying voltage on the
SEQ pin. During this time, a voltage of 50mV (± 20 mV) is maintained on the SEQ pin. This delay gives the
module enough time to complete its internal power-up soft-start cycle. During the delay time, the SEQ pin
should be held close to ground (nominally 50mV ± 20 mV). This is required to keep the internal op-amp out of
saturation thus preventing output overshoot during the start of the sequencing ramp. By selecting resistor R1
according to the following equation:
R1 =
24950
V IN − 0.05
ohms
The voltage at the sequencing pin will be 50mV when the sequencing signal is at zero.
MODULE
VIN+
499K
+
OUT
R1
SEQ
10K
-
GND
Circuit showing connection of the sequencing signal to the SEQ pin
After the 10msec delay, an analog voltage is applied to the SEQ pin and the output voltage of the module will
track this voltage on a one-to-one volt bases until the output reaches the set-point voltage. To initiate
simultaneous shutdown of the modules, the SEQ pin voltage is lowered in a controlled manner. The output
voltage of the modules tracks the voltages below their set-point voltages on a one-to-one basis. A valid input
voltage must be maintained until the tracking and output voltages reach ground potential.
When using the sequencing feature to control start-up of the module, pre-bias immunity during start-up is
disabled. The pre-bias immunity feature of the module relies on the module being in the diode-mode during
start-up. When using the sequencing feature, modules goes through an internal set-up time of 10msec, and will
be in synchronous rectification mode when the voltage at the SEQ pin is applied. This will result in the module
sinking current if a pre-bias voltage is present at the output of the module. When pre-bias immunity during startup is required, the sequencing feature must be disabled. For additional guidelines on using the sequencing
feature please contact the Bel Power technical representative for additional information.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
18
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
Power Good
The SLIN-03E1Ax modules provide a Power Good (PGOOD) signal that is implemented with an open-drain
output to indicate that the output voltage is within the regulation limits of the power module. The PGOOD signal
will be de-asserted to a low state if any condition such as over temperature, over current or loss of regulation
occurs that would result in the output voltage going ±10% outside the set-point value. The PGOOD terminal
should be connected through a pull-up resistor (suggested value 100KΩ) to a source of 5VDC or lower.
Tunable LoopTM
The SLIN-03E1Ax modules have a new feature that optimizes transient response of the module called Tunable
LoopTM.
External capacitors are usually added to the output of the module for two reasons: to reduce output ripple and
noise and to reduce output voltage deviations from the steady-state value in the presence of dynamic load
current changes. Adding external capacitance however affects the voltage control loop of the module, typically
causing the loop to slow down with sluggish response. Larger values of external capacitance could also cause
the module to become unstable.
The Tunable LoopTM allows the user to externally adjust the voltage control loop to match the filter network
connected to the output of the module. The Tunable LoopTM is implemented by connecting a series R-C
between the SENSE and TRIM pins of the module, as shown below. This R-C allows the user to externally
adjust the voltage loop feedback compensation of the module.
VOUT
SENSE
RTUNE
MODULE
CO
CTUNE
TRIM
GND
RTrim
Circuit diagram showing connection of RTUNE and CTUNE to tune the control loop of the module
Recommended values of RTUNE and CTUNE for different output capacitor combinations are given in below Tables
2 and 3. Table 2 shows the recommended values of RTUNE and CTUNE for different values of ceramic output
capacitors up to 470uF that might be needed for an application to meet output ripple and noise requirements.
Selecting RTUNE and CTUNE according to Table 2 will ensure stable operation of the module.
In applications with tight output voltage limits in the presence of dynamic current loading, additional output
capacitance will be required. Table 3 lists recommended values of RTUNE and CTUNE in order to meet 2% output
voltage deviation limits for some common output voltages in the presence of a 1.5A to 3A step change (50% of
full load), with an input voltage of 12V.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
19
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
Tunable LoopTM (continued)
Table 2.General recommended values of RTUNE and CTUNE for Vin=12V and various external ceramic capacitor
combinations.
Co
RTUNE
CTUNE
1x47μF
270
2200pF
2x47μF
180
4700pF
4x47μF
100
18nF
6x47μF
75
18nF
10x47μF
75
22nF
Table 3.Recommended values of RTUNE and CTUNE to obtain transient deviation of ≤2% of Vout for a 1.5A step
load with Vin=12V.
Vo
5V
3.3V
2.5V
1.8V
1.2V
Co
1x22μF
1x47μF
2x47μF
2x47μF
3x47μF
RTUNE
CTUNE
270
820pF
100mV
270
2200pF
64mV
180
4700pF
37mV
150
4700pF
36mV
150
10nF
22mV
ΔV
0.6V
1x47μF+330μF
Polymer
100
15nF
12mV
Thermal Considerations
Power modules operate in a variety of thermal environments; however, sufficient cooling should always be
provided to help ensure reliable operation.
Considerations include ambient temperature, airflow, module power dissipation, and the need for increased
reliability. A reduction in the operating temperature of the module will result in an increase in reliability. The
thermal data presented here is based on physical measurements taken in a wind tunnel.
25.4_
(1.0)
Wind Tunnel
PWBs
Power Module
76.2_
(3.0)
x
12.7_
(0.50)
Probe Location
for measuring
airflow and
ambient
temperature
Air
flow
Thermal Test Setup
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
20
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
Thermal Considerations (continued)
The thermal reference points, Tref, used in the specifications are also shown below. For reliable operation the
temperatures at these points should not exceed 115oC. The output power of the module should not exceed the
rated power of the module (Vo,set x Io,max).
Preferred airflow direction and location of hot-spot of the module (Tref).
Example Application Circuit
Requirements:
Vin:
Vout:
Iout:
ΔVout:
Vin, ripple
12V
1.8V
2.25A max., worst case load transient is from 1.5A to 2.25A
1.5% of Vout (27mV) for worst case load transient
1.5% of Vin (50mV, p-p)
Vin+
VIN
Vout+
VOUT
SENSE
RTUNE
+
CI2
MODULE
CI1
CTUNE
Q3
ON/OFF
GND
CI1
CI2
CO1
CTune
RTune
RTrim
CO1
TRIM
RTrim
10μF/16V ceramic capacitor (e.g. Murata GRM Series)
47μF/16V bulk electrolytic
2 x 47μF/6.3V ceramic capacitor (e.g. TDK C Series)
4.7nF ceramic capacitor (can be 1206, 0805 or 0603 size)
180 ohms SMT resistor (can be 1206, 0805 or 0603 size)
4.87kΩ SMT resistor (can be 1206, 0805 or 0603 size, recommended tolerance of 0.1%)
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
21
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
Mechanical Outline
PIN 7
PIN 8
PIN
1
2
3
4
5
6
7
8
9
10
FUNCTION
ON/OFF
VIN
GND
VOUT
SENSE
TRIM
GND
NC
SEQ
PGOOD
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
22
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
Mechanical Outline (continued)
Recommended Pad Layout
PIN 8
PIN 7
Dimensions are in millimeters and (inches).
Tolerances: x.x mm ± 0.5 mm (x.xx in. ± 0.02 in.) [unless otherwise indicated]
x.xx mm ± 0.25 mm (x.xxx in ± 0.010 in.)
Note: This module is recommended and compatible with Pb-Free Reflow Soldering and must be
soldered using a reflow profile with a peak temperature of no more than 260ºC for less than 5
seconds.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
23
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
Packaging Details
The SLIN-03E1Ax modules are supplied in tape & reel as standard. Modules are shipped in quantities of 400
modules per reel.
All Dimensions are in millimeters and (in inches).
Reel Dimensions:
Outside Dimensions:
Inside Dimensions:
Tape Width:
330.2 mm (13.00)
177.8 mm (7.00”)
24.00 mm (0.945”)
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
24
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
September 1, 2009
Surface Mount Information
Pick and Place
The SLIN-03E1Ax modules use an open frame construction and are designed for a fully automated assembly
process. The modules are fitted with a label designed to provide a large surface area for pick and place
operations. The label meets all the requirements for surface mount processing, as well as safety standards, and
is able to withstand reflow temperatures of up to 300oC. The label also carries product information such as part
number and serial number.
Nozzle Recommendations
The module weight has been kept to a minimum by using open frame construction. Variables such as nozzle
size, tip style, vacuum pressure and placement speed should be considered to optimize this process. The
minimum recommended inside nozzle diameter for reliable operation is 3mm. The maximum nozzle outer
diameter, which will safely fit within the allowable component spacing, is 7 mm.
Lead Free Soldering
The SLIN-03E1Ax modules are lead-free (Pb-free) and RoHS compliant and fully compatible in a Pb-free
soldering process. Failure to observe the instructions below may result in the failure of or cause damage to the
modules and can adversely affect long-term reliability.
Pb-Free Reflow Profile
Power Systems will comply with J-STD-020 Rev. C (Moisture/Reflow Sensitivity Classification for Nonhermetic
Solid State Surface Mount Devices) for both Pb-free solder profiles and MSL classification procedures. This
standard provides a recommended forced-air-convection reflow profile based on the volume and thickness of
the package. The suggested Pb-free solder paste is Sn/Ag/Cu (SAC). The recommended linear reflow profile
using Sn/Ag/Cu solder is shown in the figure below. Soldering outside of the recommended profile requires
testing to verify results and performance.
MSL Rating
The SLIN-03E1Ax modules have a MSL rating of 2.
Storage and Handling
The recommended storage environment and handling procedures for moisture-sensitive surface mount
packages is detailed in J-STD-033 Rev. A (Handling, Packing, Shipping and Use of Moisture/Reflow Sensitive
Surface Mount Devices). Moisture barrier bags (MBB) with desiccant are required for MSL ratings of 2 or
greater. These sealed packages should not be broken until time of use. Once the original package is broken,
the floor life of the product at conditions of ≤ 30°C and 60% relative humidity varies according to the MSL rating
(see J-STD-033A). The shelf life for dry packed SMT packages will be a minimum of 12 months from the bag
seal date, when stored at the following conditions: < 40° C, < 90% relative humidity.
300
Per J-STD-020 Rev. C
Peak Temp 260°C
Reflow Temp (°C)
250
200
* Min. Time Above 235°C
15 Seconds
Cooling
Zone
150
Heating Zone
1°C/Second
*Time Above 217°C
60 Seconds
100
50
0
Reflow Time (Seconds)
Recommended linear reflow profile using Sn/Ag/Cu solder.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
25
NON-ISOLATED DC/DC CONVERTERS
4.5 Vdc - 14 Vdc Input, 0.59 Vdc - 5.5 Vdc /3 A Outputs
Bel Power, Inc. , a subsidiary of Bel Fuse, Inc.
October 8, 2009
Post Solder Cleaning and Drying Considerations
Post solder cleaning is usually the final circuit-board assembly process prior to electrical board testing. The
result of inadequate cleaning and drying can affect both the reliability of a power module and the testability of
the finished circuit-board assembly.
Revision History
Date
Revision
Changes Detail
2009-6-10
A
First release
2009-6-25
B
Section “Surface Mount Information” added.
Approval
T. Bubriski
TM
T. Bubriski
2009-9-1
C
Tunable Loop
logo added.
T. Bubriski
2009-10-8
D
Updated Startup Time waveforms on page 10.
T. Bubriski
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and
other hazardous substances from electronic products.
©2009 Bel Fuse Inc. Specifications subject to change without notice. 10/08/09
26
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