New High-Power Chip Resistors Enable Improved Power Density Designs

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The new inverse format thick film chips offer two to three times the standard power rating in a smaller PCB footprint

With the announcement of the WHPC0508X, WHPC0612X and WHPC1020X chip resistors, TT Electronics has added extra-high-power range options to its WHPC resistor series that are ideal for compact power supply and motion control applications. Inverse geometry with the terminations on the long sides equips the new WHPC chip resistors with very high thermal contact for PCB and low thermal impedance. As a result, two to three times conventional power ratings can be obtained for the same footprint without relying on excessive PCB copper heatsink areas. For example, the WHPC1020 with terminal heatsinking has copper areas of 80mm2 runs at 2W continuous dissipation.

“Our expansion of the WHPC resistor series taps into TT’s extensive expertise and ingenuity in high power density designs,” said Barry Peters, VP Product Management and Engineering, TT Electronics. “By using a high-power density component, we’ve been able to reduce the required PCB footprint, giving designers greater flexibility and higher reliability for their power conversion and motion control product designs.”

The three new WHPC chip resistors are fully AEC-Q200 qualified and offer a wide range of values from 1R0 to 1M0 and tolerances down to 0.5%. Building on TT’s expertise in specialist chip resistors for use in demanding conditions, the new products are available in 1W (WHPC0508), 1.5W (WHPC0612) and 2W (WHPC1020 chip) sizes. Such high power density components save PCB area and boost reliability by restricting the temperature rise in the component hotspot.


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