Rohm improves rated power in thick film chip resistors
Following a review of resistive material used in thick film chip resistors, Rohm has announced the availability of high power, wide terminal, thick film chip resistors for current detection in applications such as inverters, AC, and energy-efficient appliances.
Rohm reports that the 10 to 910mOhm resistors improve rated power to 2W in the compact 2550 size (2.5 x 5.0mm, t=0.55mm), which is four times higher than conventional short-terminal types. This contributes to improved energy savings and greater miniaturisation in high power applications. The resistor family is available in 48 values. Optimisation of the element structure makes it possible to achieve best-in-class TCR (temperature co-efficient of resistance) characteristics among wide terminal thick-film chip resistors, claims Rohm. For example, in the case of 100mOhm, the LTR50 series delivers a TCR of ±100ppm/degrees C, ensuring stable resistance. The result is minimal resistance fluctuation due to temperature changes, for high accuracy current detection.
Growth in embedded components has led to an increase in demand for compact, high power resistors.
Rohm Semiconductor develops and manufactures low power microcontrollers, power management, standard ICs, SiC diodes, MOSFETs and modules, power transistors and diodes, LEDs to passives components such as resistors, tantalum capacitors and LED display units, thermal printheads in manufacturing plants in Japan, Korea, Malaysia, Thailand, the Philippines, China and Europe.
