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]