Vishay has announced a new surface-mount Power Metal Strip current-sense resistor that extends the power rating to 1W in the compact 0612 case size.
In order to improve the measurement accuracy, Vishay Dale WSKW0612 uses soldered copper terminal structure and Kelvin 4-terminal connection, which can reduce TCR to 75ppm. The device offers low resistance values as low as 0.001ohm to minimize excessive power consumption and improve the efficiency of the final product.
The resistors released today are four times more powerful than standard resistors (1206), saving board space and reducing costs by using fewer and smaller components. WSKW0612's solder terminals reduce terminal resistance and reduce accuracy compared to clad or plated terminals, while the low TCR provided by its 4-terminal connection reduces system measurement errors compared to typical 2-terminal equipment.
The device's advanced structure combines solid metal nickel chromium and manganese copper resistance elements with low TCR (<20 ppm / ° C). This produces a pulse-resistant, tight-tolerance resistor that maintains the excellent electrical characteristics of the Power Metal Strip structure. Proprietary processing technology produces extremely low resistance values ranging from 0.001ohm to 0.003ohm with tolerances of ± 1% and ± 5%. The device offers low thermal EMF (<3μV / C) and a temperature range of -65C to + 170C.
The RoHS-compliant WSKW0612 is ideal for all types of current detection and pulse applications in mobile phone power management. DC / DC converters for servers, VRMs for laptops, and lithium-ion battery safety and management; industrial instrumentation and air-conditioning inverters; the company said, as well as automotive electronic control systems such as engines, gearboxes, antilock Brake system, audio and climate control system.
