WSL1, WSL2, WSL8 (CS20)

POWER SOLUTIONS – WILLOW TECHNOLOGIES LTD
Lead Free
CURRENT DETECT CHIP RESISTORS,
WSL1, WSL2, WSL8 (CS20)
Features and Applications
Presenting surface mounted, low resistance value, low profile, low inductance and large impulse durable
metal plate current detectors.
Rating 1/2W, 1W and 8W selectable for your applications.
Tolerance +/-1% and TC 0ppm/C to +50ppm/C standard.
Current detection circuit for high speed CPU peripherals, battery charging current protections, DC-DC
conversion modules, DC-AC conversion, servo-motor control electronics, intelligent power modules, etc.
Dimensional Specifications (mm)
B
Type
A
B
C
D
WSL1
5.08+/-0.25
2.54+/-0.25
2.0max
1.0
WSL2
6.4+/-0.3
3.2+/-0.3
2.0max
1.0
WSL8
12.8+/-0.5
6.4max
2.5max
1.3
Marking
D
Marking is done by 3 digits resistance value notation and
tolerance code F(1%).
R0001F
D
A
C
Specification and Performances
WSL1
Resistance
TCR
Tolerance
Rating Power
Rating Current
Maximum Current
Series Inductance
Operating Temp.
Storage Temp.
WSL2
WSL8(CS20)
0.5m, 1m, 2m, 3m, 4m, 5mohms
+/-50ppm/C(C)
+/-1.0% (F), +/-5.0% (J)
1W
2W
8W
30A
45A
90A
45A
65A
126A
1nH
2nH
5nH
-55 C to 175 C
-55 to +175 C
-55 C to 175 C
-55 C to 175 C
-55 C to 175 C
-55 C to 175 C
Remarks
Actually+/-30ppm/C
Attached on pcb (70micron)
At 1mohm
2.5seconds one time
Willow Technologies Ltd. Shawlands Court Newchapel Road Lingfield Surrey RH7 6BL ENGLAND
Tel. +44 (0) 1342 835234 Fax. +44 (0) 1342 834306 Web. www.willow.co.uk E-mail. [email protected]
Lead Free
POWER SOLUTIONS - WILLOW TECHNOLOGIES LTD
CURRENT DETECT CHIP RESISTORS,
WSL1, WSL2, WSL8 (CS20)
Ordering Information
Ordering P/N
WSL1C1mohmF001
WSL2C1mohmF001
WSL8C2mohmF001
Type
WSL1
WSL2
WSL8
TC
C (50ppm)
C (50ppm)
C (50ppm)
Resistance
1 mOhm
3 mOhm
2 mOhm
Note: 178mm dia. reel contains 4000pcs/WSL1 and 2000pcs/WSL2.
Tolerance
F (1%)
J (5%)
F (1%)
Additional Code
Z00 bulk, Z01 tape
Z00 bulk, Z01 tape
Z00 bulk, Z01 tape
More detail about taping, please call factory.
Specifications
Specifications
+/-0.5%+0.5mohm)
+/-(0.5%+0.5mohm)
+/-(1.0%+0.5mohm)
+/-(0.5%+0.5mohm)
+/-(0.5%+0.5mohm)
+/-(0.25%+0.5mohm)
90%/terminal surface
+/-(0.5%+0.1mohm)
+/-(0.5%+0.1mohm)
Short Time Overload
Low Temperature Storage
High Temperature Storage
Heat Shock
Vibration
Soldering Heat
Solder ability
Humidity
Load Life
Frequency Characteristics
Conditions
maximum current, 2.5seconds.
-55C, 24hours
+175C, 1000hours
-55C to +125C, 20min. interval, 5min. 5cycles
10-2000Hz, 1.5mm/20gr, 2hours
260C+/-5C, 10+/-1seconds.
85C, 85%RH, dc0.1W, 1000 hours
25C, dc rated power, 90min ON, 30min OFF, 1000hours
Temperature Rise, WSL1
Impedance(ohm)
Temperature (C) at hot spot.
250
0.050
WSL1
200
150
0.010
WSL1A1mohmF
100
0.005
50
0
0.001
10k
100k
1M
Frequency(Hz)
10M
Temperature Rise, WSL2
250
200
200
150
150
0
0
WSL2A1mohmF
0.4
0.4
0.6
0.8
Applied Power (W)
1.0
Temperature (C) at hot spot.
250
50
0.2
Temperature Rise, WSL8
Temperature (C) at hot spot.
100
0
0.8
1.2
1.6
Applied Power (W)
2.0
100
WSL8A1mohmF
50
0
0
2.0
4.0
6.0
8.0
Applied Power (W)
10.0
Willow Technologies Ltd. Shawlands Court Newchapel Road Lingfield Surrey RH7 6BL ENGLAND
Tel. +44 (0) 1342 835234 Fax. +44 (0) 1342 834306 Web. www.willow.co.uk E-mail. [email protected]
1.2
POWER SOLUTIONS - WILLOW TECHNOLOGIES LTD
Lead Free
CURRENT DETECT CHIP RESISTORS,
WSL1, WSL2, WSL8 (CS20)
Temperature Characteristics, WSL2
Temperature Characteristics, WSL8
dR/R (ppm)
dR/R (ppm)
+4000
+4000
Slope of +30ppm/C
+2000
Slope of +30ppm/C
+2000
0
0
-2000
-2000
-4000
-50
Dots shows typically measured.
Slope of –30ppm/C
0
25
50
75
100
Resistor Temperature ( C )
Slope of –30ppm/C
-4000
-50
125
0
25
50
75
100
Resistor Temperature ( C )
125
Recommended Foot Print (mm)
WSL1
WSL2
3.5
WSL8
4.2
1.5
2.0
1.5
2.0
3.0
3.5
7.4
2.5
2.5
9.0
Soldering Recommendation
Because heat capacity of WSL8 is larger than another small chip components, when re-flow soldering
process is taken in installing WSL8, temperature shall be increase by 10C or 20C.
Custom design: Making customer required length / width current shunt resistor is available, please mail to
below. [email protected]
Willow Technologies Ltd. Shawlands Court Newchapel Road Lingfield Surrey RH7 6BL ENGLAND
Tel. +44 (0) 1342 835234 Fax. +44 (0) 1342 834306 Web. www.willow.co.uk E-mail. [email protected]
POWER SOLUTIONS - WILLOW TECHNOLOGIES LTD
Lead Free
CURRENT DETECT CHIP RESISTORS,
WSL1, WSL2, WSL8 (CS20)
Taping Specifications (WSL8)
1.75
11.50.
24.0+/-0.3
13.30
1.50
0.30+/-0.05
2.00
D
A
Dia. 1.50+0.1-0
Dia.1.50+0.1-0
4.80
4.00
t
X
B
C
D
P/N
A/NA
WSL8-1mF
A
WSL8-2mF
A
WSL8-3mF
A
WSL8-3mF
A
WSL8-4mF
NA
WSL8-5mF
A
WSL8-10mF
NA
Note: Above dimensions are average.
A
12.8
12.8
12.8
12.8
12.8
12.8
B
4.0
4.0
2.7
4.5
5.3
4.4
C
1.14
0.64
0.64
0.44
0.34
0.34
D
1.4
1.4
1.4
1.4
1.4
1.4
X
10.0
10.0
10.0
10.0
10.0
10.0
t
1.0
0.5
0.5
0.3
0.2
0.2
Resistance Measuring Position
Resistance checking of the WSL resistors is
Resistor
Contact Probe
Current
Voltage
done at side positions of resistor terminals as
shown in left figure with
4-ports measuring
system. Resistance tolerance of +/-1.0% shall be
within +0.8% and –0.8% in factory inspection.
When surface mount resistor is attached on circuit
board, small resistance change will be occur, If
small resistance change cannot be ignored, please
Milli-Ohm Meter
call factory.
20040212
Willow Technologies Ltd. Shawlands Court Newchapel Road Lingfield Surrey RH7 6BL ENGLAND
Tel. +44 (0) 1342 835234 Fax. +44 (0) 1342 834306 Web. www.willow.co.uk E-mail. [email protected]