LVR Series Low-TCR Current Sense Chips appLicationS The resistors are constructed using out- standing TCR level material, which makes Consumer goods LVR resistors excellent for current sensing Computer application in battery charger circuit & DC-DC Telecom / Datacom converter. The composition of the resistive material is adjusted to give the LVR series Industrial / Power supply resistors more resistive stability than the Alternative Energy competition in very small package sizes. Car electronics Batter y SeRieS SpecificationS Power Series Size Rating Resistance Range TCR (ppm/C) Tolerance LVR02A 0201 0.1W 5m - 10m 150ppm/C 1%, 5% 2.5m 350 ppm/C LVR04A 0402 0.125W 1%, 5% 5m - 20m 150 ppm/C chaRacteRiSticS Operating 55C to +125C Derating Temp. Range 100 Power Standard rated power at 70C see chart above -55 70 80 Rating Rated The DC or AC (rms) continuous working voltage cor- 60 Voltage responding to the rated power is determined by the 40 following formula: V = (PxR) 20 125 or max. working voltage whichever is less, where: 0 V = Cont. rated DC or AC (rms) working voltage (V) -60 -40 -20 0 20 40 60 80 100 120 140 160 P = Rated power (W) Ambient Temperature, C R = Resistance value () Reflow Soldering Conditions Temperature Size Resistance range TCR Coeff. of 300 0201 5m - 10m 150 ppm/C Resistance 270 0402 2.5m 350 ppm/C 250 ramp up 5m - 20m 150 ppm/C rate <3K/s Terminations Cu, Ni, matte Tin 200 ramp down 190 rate <6K/s 150 100 ramp up rate <3K/s 50 Preheating 0 0 50 100 150 200 250 Time (sec.) 12 1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info ohmite.com Temperature C Percent Rated PowerLVR Series Low-TCR Current Sense Chips peRfoRmance data Test Method Procedure Requirements IEC60115-1 4.13 2.5 times of rated power for 5 seconds at room temperature (1%+0.0005) Short time overload No visible damage MIL-STD-202-Method 1,000 hours at maximum operating temperature depending on speci- (1.0%+0.0005) High 108 fication, unpowered. No direct impingement of forced air to the parts Temperature Tolerances: 1255C Exposure Moisture MIL-STD-202-Method Each temperature / humidity cycle is defined at 8 hours (method 106F), (0.5%+0.0005) Resistance 106 3 cycles / 24 hours for 10d with 25C / 65C 95% R.H, without steps 7a & 7b, unpowered Operational MIL-STD-202 Method 1,000 hours at 702C applied RCWV. 1.5 hours on, 0.5 hour off, still air (1.0%+0.0005) Life/ 108 required Endurance IEC 60115-1 4.25.1 Solderability - J-STD-002 test B Electrical Test not required. Magnification 50X. SMD conditions: 1st step Well tinned (>95% covered) Wetting : method B, aging 4 hours at 155C dry heat 2nd step: leadfree solder No visible damage bath at 2453C Dipping time: 3 0.5 seconds Moisture MIL-STD-202 Method Each temperature / humidity cycle is defined at 8 hours (Method 106G), (0.5% + 0.0005) Resistance 106 3 cycles / 24 hours for 10d. with 25C / 65C 95% R.H, without steps 7a No visible damage & 7b, un-powered Parts mounted on test board, without condensation on parts. Measurement at 242 hours after test conclusion. Thermal MIL-STD-202 Method -55/+125C. Number of cycles required is 300. Parts mounted on test (1.0% + 0.0005) Shock 107 board. Maximum transfer time is 20 seconds. Dwell time is 15 minutes. Board Flex/ IEC 60115-1 4.33 Device mounted on PCB test board as described, only 1 board bend- (1.0 % + 0.0005) Bending ing required. 2 mm bending. Bending time: 601 seconds. Ohmic value checked during bending Resistance MIL-STD-202 Method Condition B, no pre-heat of samples. Leadfree solder, 2605C, (0.5% + 0.0005) to Soldering 210 101seconds immersion time. Procedure 2 for SMD: devices fluxed and No visible damage Heat cleaned with isopropanol IEC 60115-1 4.18 1-866-9-OHMITE Intl 1-847-258-0300 Fax 1-847-574-7522 www.ohmite.com info ohmite.com 13