BEL V7PB

NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
5V Input / 0.9V – 3.3V Output / 10A
BP03V7PB-10B
V7PB-10B Series
•
Nonisolated
•
Industry standard footprint
•
Fixed frequency
•
High efficiency means less power dissipation
•
Excellent thermal performance
•
Optimized for cost
•
Remote on/off
•
Remote sense
•
Undervoltage lockout (UVLO)
•
Over current and short circuit protection
•
Industrial temperature range
Description
The Bel V7PB-10B modules are a series of non-isolated, step down DC/DC power converters that operate from a nominal 5V
source. These converters are available in a range of output voltages from 0.9V to 3.3V. They are packaged in a compact, SIP
package rated at 10A. Standard features include remote on/off, over current and short circuit protection, output voltage adjust
and industrial temperature range (-40° to +85° C). The output is closely regulated and the efficiency is typically 95.5% @ 3.3V
output at full load. These products may be used almost anywhere low voltage silicon is employed and a 5V source is available.
Typical applications include file servers, routers, line cards and other computing and communications equipment.
Applications
•
Distributed power architectures
•
Data networking equipment
•
Telecommunications
•
Computers and peripherals
Part Number Selection
Output
Voltage
Input
Voltage
Max. Output
Current
Max. Output
Power
Typical
Efficiency
Part Number
Remote Sense
Active Low
Part Number
Remote Sense
Active High
3.3V
5V
10A
33W
95.5%
V7PB-10B33L
V7PB-10B33S
2.5V
5V
10A
25W
94%
V7PB-10B25L
V7PB-10B25S
1.8V
5V
10A
18W
92%
V7PB-10B18L
V7PB-10B18S
1.5V
5V
10A
15W
91%
V7PB-10B15L
V7PB-10B15S
1.2V
5V
10A
12W
90%
V7PB-10B12L
V7PB-10B12S
0.9V
5V
10A
9W
87%
V7PB-10B09L
V7PB-10B09S
©2003 Bel Fuse Inc.
Specifications subject to change without notice. 08.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 1
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
5V Input / 0.9V – 3.3V Output / 10A
BP03V7PB-10B
Absolute Maximum Ratings
Parameter
Symbol
Min
Max
Unit
Vin
-0.3
6
V
Vouten
-0.3
6
V
Ambient Temperature
Tamb
-40
85
°C
Storage Temperature
Tstor
-55
105
°C
Continuous Input Voltage
Output Enable Terminal Voltage
Typical
Note: Use beyond the maximum ratings may cause a reliability degradation of the DC/DC
converter or may permanently damage the device.
Input Specifications
Parameter
Operating Input Voltage
Module
Symbol
Min
Typical
Max
Units
All
Vin
4.5
5
5.5
V
Iin
Input Current
A
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
8.7
6.7
4.9
4.2
3.4
2.6
mA
No Load Input Current
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
85
130
130
140
100
140
120
180
180
180
140
180
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
5
5
8
4
4
4
10
10
10
10
10
10
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
35
40
30
30
30
20
50
50
50
50
50
50
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
120
120
100
90
90
70
180
180
180
180
180
180
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
0.0093
0.0089
0.0050
0.0022
0.0015
0.0018
Turn On Voltage Threshold
All
4.25
V
Turn Off Voltage Threshold
All
3.85
V
mA
Remote Off Input Current
Input Reflected Ripple Current1
mArms
Input Reflected Ripple Current 1
mApk
I2t Inrush Current Transient
©2003 Bel Fuse Inc.
A2s
Note:
Input capacitance two 270µF/16V,
ESR = 0.018 Ω max at 100kHz @ 25°C.
1. With simulated source impedance of
500nH, 5Hz to 20MHz.
Specifications subject to change without notice. 08.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 2
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
5V Input / 0.9V – 3.3V Output / 10A
BP03V7PB-10B
Output Specifications
Parameter
Module
Min
Typical
Max
3.234
2.450
1.764
1.470
1.176
0.882
3.3
2.5
1.8
1.5
1.2
0.9
3.366
2.550
1.836
1.530
1.224
0.918
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
8
6
5
4
4
4
16.5
12.5
9.0
7.5
7.5
7.5
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
5
4
3
3
3
3
10
7.5
5.5
4.5
4.5
4.5
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
30
40
30
20
15
10
40
50
40
30
25
20
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
43
50
38
27
22
17
66.5
70
54.5
42
37
32
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
30
35
30
30
25
20
45
50
45
45
35
30
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
10
10
10
10
6
5
15
15
15
15
10
10
Output Voltage Set Point 1
Symbol
Vout
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
Units
V
mV
Load Regulation
mV
Line Regulation
mV
Regulation Over Temperature
mV
Total Output Voltage Regulation
Output Ripple and Noise 2
mVpk
Output Ripple and Noise 2
mVrms
Output Current Range
All
Output DC Current Limit
All
Shor t Circuit Surge
Iout
0
10
Ioutlim
13
25
0.194
0.215
0.193
0.170
0.160
0.197
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
All
Overshoot at Turn On
All
Output Capacitance
All
A
A2s
Ioutsurge
Turn on Time
A
6
Ton
0
Cout
0
10
ms
3
%
5600
µF
Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated.
1. Vin = 5V, Iout = full load, Ta = 25° C.
2. 0 - 20MHz, 1µF ceramic cap on output.
©2003 Bel Fuse Inc.
Specifications subject to change without notice. 08.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 3
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
5V Input / 0.9V – 3.3V Output / 10A
BP03V7PB-10B
Output Specifications
Parameter
Module
Transient Response
Symbol
Min
Typical
Max
Units
120
160
mV
30
60
µs
130
160
mV
30
60
µs
80
120
mV
30
60
µs
90
120
mV
30
60
µs
90
120
mV
30
60
µs
90
120
mV
30
60
µs
90
120
mV
30
60
µs
90
120
mV
30
60
µs
80
110
mV
30
60
µs
80
110
mV
30
60
µs
80
100
mV
30
60
µs
80
100
mV
30
60
µs
3
∆V 50% to 100% of Max Load
Settling Time
Ts
3.3V
∆V 100% to 50% of Max Load
Settling Time
Ts
Transient Response
3
∆V 50% to 100% of Max Load
Settling Time
Ts
2.5V
∆V 100% to 50% of Max Load
Settling Time
Ts
Transient Response
3
∆V 50% to 100% of Max Load
Settling Time
Ts
1.8V
∆V 100% to 50% of Max Load
Settling Time
Ts
Transient Response
3
∆V 50% to 100% of Max Load
Settling Time
Ts
1.5V
∆V 100% to 50% of Max Load
Settling Time
Ts
Transient Response
3
∆V 50% to 100% of Max Load
Settling Time
Ts
1.2V
∆V 100% to 50% of Max Load
Settling Time
Ts
Transient Response
3
∆V 50% to 100% of Max Load
Settling Time
Ts
0.9V
∆V 100% to 50% of Max Load
Settling Time
Ts
Note: All specifications are typical at nominal input, full load at 25° C unless otherwise stated.
3. di/dt = 0.5A/1µS, Ta = 25° C without external load capacitance.
©2003 Bel Fuse Inc.
Specifications subject to change without notice. 08.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 4
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
5V Input / 0.9V – 3.3V Output / 10A
BP03V7PB-10B
General Specifications
Parameter
Module
Symbol
Min
Typical
92.5
91
89
88
87
84
95.5
94
92
91
90
87
250
300
Max
η
Efficiency1
3.3V
2.5V
1.8V
1.5V
1.2V
0.9V
Switching Frequency
All
Output Voltage Trim Range2
All
Fsw
%
90
Remote Sense Compensation
Weight
Units
All
340
kHz
110
%
10
%
9.2
g
1. Vin=5V, full load and Ta=25° C.
2. See graphs on pages 12 - 17.
Control Specifications
Parameter
Remote On/Off
3
Module
Symbol
All
Vouten
Signal Low (Unit Off)
Min
Typical
Max
Units
V
-0.3
0.8
V
2.5
5.5
V
-0.3
0.8
V
2.5
5.5
V
V7PB-10BxxS
Signal High (Unit On)
Signal Low (Unit On)
V7PB-10BxxL
Signal High (Unit Off)
3. With remote on/off pin 11 open, the module is on.
Note: On/off pin designed to work with an open collector/drain switch.
©2003 Bel Fuse Inc.
Specifications subject to change without notice. 08.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 5
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
5V Input / 0.9V – 3.3V Output / 10A
BP03V7PB-10B
Efficiency Data
Module 3.3V
Efficiency
100%
95%
90%
85%
80%
1
2
3
4
5
6
7
8
9
10
Output Current
4.5V
5V
5.5V
Module 2.5V
100%
Efficiency
95%
90%
85%
80%
75%
70%
1
2
3
4
5
6
7
8
9
10
8
9
10
Output Current
4.5V
5V
5.5V
Module 1.8V
95%
Efficiency
90%
85%
80%
75%
70%
65%
1
2
3
4
5
6
7
Output Current
4.5V
©2003 Bel Fuse Inc.
5V
5.5V
Specifications subject to change without notice. 08.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 6
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
5V Input / 0.9V – 3.3V Output / 10A
BP03V7PB-10B
Efficiency Data
Efficiency
Module 1.5V
95%
90%
85%
80%
75%
70%
65%
60%
1
2
3
4
5
6
7
8
9
10
8
9
10
8
9
10
Output Current
4.5V
5V
5.5V
Efficiency
Module 1.2V
95%
90%
85%
80%
75%
70%
65%
60%
1
2
3
4
5
6
7
Output Current
4.5V
5V
5.5V
Efficiency
Module 0.9V
90%
85%
80%
75%
70%
65%
60%
55%
50%
1
2
3
4
5
6
7
Output Current
4.5V
5V
5.5V
©2003 Bel Fuse Inc.
Specifications subject to change without notice. 08.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 7
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
5V Input / 0.9V – 3.3V Output / 10A
BP03V7PB-10B
Ripple and Noise
1µF ceramic cap added at the output.
Ripple and noise at full load and 5Vdc input,
3.3Vdc output and Ta=25° C
Ripple and noise at full load and 5Vdc input,
1.8Vdc output and Ta=25° C
Ripple and noise at full load and 5Vdc input,
1.2Vdc output and Ta=25° C
©2003 Bel Fuse Inc.
Ripple and noise at full load and 5Vdc input,
2.5Vdc output and Ta=25° C
Ripple and noise at full load and 5Vdc input,
1.5Vdc output and Ta=25° C
Ripple and noise at full load and 5Vdc input,
0.9Vdc output and Ta=25° C
Specifications subject to change without notice. 08.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 8
NON-ISOLATED DC/DC CONVERTERS
5V Input / 0.9V – 3.3V Output / 10A
POWER PRODUCTS
BP03V7PB-10B
Transient Response
Transient response: di/dt = 0.5A/µS, no external load capacitance
Vout=3.3V
50% to 100% load transients at 5V input and Ta=25° C
Vout=3.3V
100% to 50% load transients at 5V input and Ta=25° C
Vout=2.5V
50% to 100% load transients at 5V input and Ta=25° C
Vout=2.5V
100% to 50% load transients at 5V input and Ta=25° C
Vout=1.8V
50% to 100% load transients at 5V input and Ta=25° C
Vout=1.8V
100% to 50% load transients at 5V input and Ta=25° C
©2003 Bel Fuse Inc.
Specifications subject to change without notice. 08.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 9
POWER PRODUCTS
NON-ISOLATED DC/DC CONVERTERS
5V Input / 0.9V – 3.3V Output / 10A
BP03V7PB-10B
Transient Response
Transient response: di/dt = 0.5A/µS, no external load capacitance
Vout=1.5V
50% to 100% load transients at 5V input and Ta=25° C
Vout=1.5V
100% to 50% load transients at 5V input and Ta=25° C
Vout=1.2V
50% to 100% load transients at 5V input and Ta=25° C
Vout=1.2V
100% to 50% load transients at 5V input and Ta=25° C
Vout=0.9V
50% to 100% load transients at 5V input and Ta=25° C
Vout=0.9V
100% to 50% load transients at 5V input and Ta=25° C
©2003 Bel Fuse Inc.
Specifications subject to change without notice. 08.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 10
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
5V Input / 0.9V – 3.3V Output / 10A
BP03V7PB-10B
Thermal Considerations
V7PB-10B
Output Voltage Set-Point Adjustment
Trim Down Circuit
Vout
Sense
Rtrim Down
Module
Trim
Gnd
Trim Up Circuit
Vout
Sense
Module
Trim
Rtrim Up
Gnd
©2003 Bel Fuse Inc.
Specifications subject to change without notice. 08.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 11
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
5V Input / 0.9V – 3.3V Output / 10A
BP03V7PB-10B
Output Voltage Set-Point Adjustment
V7PB-10B33S Trim Resistor Calculation
Unit:Volt
Vo_n om = 3.302
Rt rim_down( Vo_adj) :=
Rt rim_up( Vo_adj) :=
7.5 ( Vo_adj − 0.8)
Vo_n om − Vo_adj
6
Vo_adj − Vo_n om
Unit:Kohm
− 4.99
Unit:Kohm
− 4.99
V7P B-10B33S Rt rim_down Curve
1240.7
941.53
Rtrim_down ( Vo_adj)
642.36
343.19
44.02
2.97
3.03
3.1
3.16
3.23
3.29
3.57
3.63
Vo_adj
V7P B-10B33S Rt rim_up Curve
605.38
457.36
Rtrim_up ( Vo_adj)
309.34
161.33
13.31
3.31
3.37
3.44
3.5
Vo_adj
©2003 Bel Fuse Inc.
Specifications subject to change without notice. 08.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 12
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
5V Input / 0.9V – 3.3V Output / 10A
BP03V7PB-10B
Output Voltage Set-Point Adjustment
V7PB-10B25S Trim Resistor Calculation
Unit:Volt
Vo_n om = 2.503
Rt rim_down( Vo_adj) :=
Rt rim_up( Vo_adj) :=
2.37 ( Vo_adj − 0.8)
Vo_n om − Vo_adj
1.896
Vo_adj − Vo_n om
Unit:Kohm
− 4.99
Unit:Kohm
− 4.99
V7P B-10B25S Rt rim_down Curve
242.01
183.65
Rtrim_down ( Vo_adj)
125.3
66.94
8.59
2.25
2.3
2.35
2.39
2.44
2.49
2.7
2.75
Vo_adj
V7P B-10B25S Rt rim_up Curve
216.91
163.36
Rtrim_up ( Vo_adj)
109.8
56.25
2.69
2.51
2.56
2.61
2.65
Vo_adj
©2003 Bel Fuse Inc.
Specifications subject to change without notice. 08.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 13
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
5V Input / 0.9V – 3.3V Output / 10A
BP03V7PB-10B
Output Voltage Set-Point Adjustment
V7PB-10B18S Trim Resistor Calculation
Unit:Volt
Vo_n om = 1.802
Rt rim_down( Vo_adj) :=
Rt rim_up( Vo_adj) :=
2.37 ( Vo_adj − 0.8)
Vo_n om − Vo_adj
1.896
Vo_adj − Vo_n om
Unit:Kohm
− 4.99
Unit:Kohm
− 4.99
V7P B-10B18S Rt rim_down Curve
182.97
147.51
112.05
Rtrim_down ( Vo_adj)
76.59
41.12
5.66
1.62
1.65
1.69
1.72
1.76
1.79
1.95
1.98
Vo_adj
V7P B-10B18S Rt rim_up Curve
198.92
150.61
Rtrim_up ( Vo_adj)
102.31
54
5.69
1.81
1.84
1.88
1.91
Vo_adj
©2003 Bel Fuse Inc.
Specifications subject to change without notice. 08.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 14
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
5V Input / 0.9V – 3.3V Output / 10A
BP03V7PB-10B
Output Voltage Set-Point Adjustment
V7PB-10B15S Trim Resistor Calculation
Unit:Volt
Vo_n om = 1.502
Rt rim_down( Vo_adj) :=
Rt rim_up( Vo_adj) :=
2.37 ( Vo_adj − 0.8)
Vo_n om − Vo_adj
1.896
Vo_adj − Vo_n om
Unit:Kohm
− 4.99
Unit:Kohm
− 4.99
V7P B-10B15S Rt rim_down Curve
131.21
105.69
80.16
Rtrim_down ( Vo_adj)
54.64
29.11
3.59
1.35
1.38
1.41
1.43
1.46
1.49
1.62
1.65
Vo_adj
V7P B-10B15S Rt rim_up Curve
232.2
187.32
142.45
Rtrim_up ( Vo_adj)
97.57
52.7
7.82
1.51
1.54
1.57
1.59
Vo_adj
©2003 Bel Fuse Inc.
Specifications subject to change without notice. 08.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 15
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
5V Input / 0.9V – 3.3V Output / 10A
BP03V7PB-10B
Output Voltage Set-Point Adjustment
V7PB-10B12S Trim Resistor Calculation
Unit:Volt
Vo_n om = 1.203
Rt rim_down( Vo_adj) :=
Rt rim_up( Vo_adj) :=
2.49 ( Vo_adj − 0.8)
Vo_n om − Vo_adj
1.992
Vo_adj − Vo_n om
Unit:Kohm
− 2.37
Unit:Kohm
− 2.37
V7P B-10B12S Rt rim_down Curve
72.8
58.9
45
Rtrim_down ( Vo_adj)
31.1
17.2
3.3
1.08
1.1
1.12
1.15
1.17
1.19
1.3
1.32
Vo_adj
V7P B-10B12S Rt rim_up Curve
226.06
173.2
Rtrim_up ( Vo_adj)
120.35
67.5
14.64
1.21
1.23
1.25
1.28
Vo_adj
©2003 Bel Fuse Inc.
Specifications subject to change without notice. 08.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 16
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
5V Input / 0.9V – 3.3V Output / 10A
BP03V7PB-10B
Output Voltage Set-Point Adjustment
V7PB-10B09S Trim Resistor Calculation
Unit:Volt
Vo_n om = 0.903
Rt rim_down( Vo_adj) :=
Rt rim_up( Vo_adj) :=
1.05 ( Vo_adj − 0.8)
Vo_n om − Vo_adj
0.84
Vo_adj − Vo_n om
Unit:Kohm
− 0.01
Unit:Kohm
− 0.01
V7P B-10B09S Rt rim_down Curve
31.68
25.36
19.05
Rtrim_down ( Vo_adj)
12.73
6.42
0.1
0.81
0.83
0.85
0.86
0.88
0.9
Vo_adj
V7P B-10B09S Rt rim_up Curve
125.62
102.23
78.84
Rtrim_up ( Vo_adj)
55.45
32.07
8.68
0.91
0.93
0.95
0.96
0.98
1
Vo_adj
©2003 Bel Fuse Inc.
Specifications subject to change without notice. 08.03
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463 • Fax 201-432-9542 • www.belfuse.com
page 17
NON-ISOLATED DC/DC CONVERTERS
POWER PRODUCTS
5V Input / 0.9V – 3.3V Output / 10A
BP03V7PB-10B
Mechanical
V7PB-10B
0.387 [9.84]
0.224 [5.70]
2.00 [50.80]
0.55
[13.97]
0.063 [1.60]
0.15
[3.81]
0.025 [0.64]
0.05
[1.27]
0.10
[2.54]
1 2 3 4 5
0.09 [2.30] max
6 7 8 91011
Pin
Function
1
+Vo
2
+Vo
3
Remote Sense Option
4
+Vo
5
Ground
6
Ground
7
+Vin
8
+Vin
9
No Pin
10
Trim
11
Remote On/Off
©2003 Bel Fuse Inc.
Specifications subject to change without notice. 08.03
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
page 18