Thin film chips on AlN offer high power and precision in single resistor product

TT Electronics has released its TFHP series thin film, high power chip resistors. The product family combines high power and high precision in a single resistor, capitalising on AIN ceramic substrate with almost six times the conductivity of alumina, the conventional substrate material for chip resistors. This high-power density component saves PCB area and can boost reliability by restricting the temperature rise in the component hotspot. The series is optimised for precision power supply, power amplifier, and process control applications, which all gain from the enhanced heat transfer from element to terminals of this specialist design.

“Aluminium nitride-based TFHP with the precision of thin film technology is a strategic addition to TT’s growing portfolio of power chip resistors,” said Nick Atkinson, senior product line manager, TT Electronics. “The unique value these resistors provide gives designers the opportunity to reduce component size, minimise temperature rise, and increase reliability of their high-power analogue circuit designs.”

Building on its expertise in power chip resistors engineered to satisfy demanding thermal management targets, the new series provides 2W in 1206 and 6W in 2512 chip sizes. Also, it features large area terminations for enhanced thermal contact with a PCB. These high-power resistors also provide greater precision than thick film alternatives, supplying 0.1% tolerance, 25ppm/C TCR combined with reduced self-heating to enhance linearity.