Power Integrated Module targets next generation automotive BLDC systems
The STK984-190-E contains six 40 V, 30 A MOSFETs configured as a three-phase bridge with an additional 40 V, 30 A high-side reverse battery protection MOSFET. The MOSFETs are mounted onto a direct bonded copper (DBC) substrate, resulting in a compact module with high thermal performance that takes up only half of the board space of an equivalent discrete design.
The module is suitable for use in 12 V automotive electric brushless DC (BLDC) motor drive applications with power ratings up to 300 W, such as electric pumps, fans and windscreen wipers. Used in combination with motor controllers, such as LV8907UW, designers can build high efficiency BLDC solution with best in class thermal performance, built in diagnostics, and an ultra-small PCB that saves critical size and weight.
Using the module allows both the component count and the bill of materials costs to be reduced substantially. The DBC substrate reduces the thermal resistance, which reduces the operating temperature of the MOSFETs. This reduces power losses and increases reliability due to a reduced change in temperature during thermal cycling. Reliability is also improved by the isolation provided by the DBC substrate. STK984-190-E has a specified operational temperature range of -40°C to 150°C. The integrated MOSFETs are all AEC-Q101 qualified.
“At least 13-15 discrete components would typically be needed to develop an effective BLDC drive solution, whereas the STK984-190-E automotive power module needs less than half that,” said Chris Chey, General Manager of System Solutions Group at ON Semiconductor. “In addition to its compact size, the strong thermal performance of the STK984-190-E allows a smaller heatsink to be employed. The reduction in system size and weight that it enables mean the current challenges that engineers face in terms of boosting fuel economy and overcoming space constraints can be fully addressed.”
The STK984-190-E is supplied in a Pb-free DIP-S3, measuring 29.6mm x 18.2mm x 4.3mm. It is priced at $3.50 per unit in 16-unit quantities.
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