Three-phase variable-speed power module enables higher torque & increased reliability



Automotive engineers are constantly looking for ways to reduce fuel consumption and lower CO2 emissions, while at the same time lowering overall system costs. To help designers meet these challenges, Fairchild Semiconductor (NYSE: FCS) developed the FTCO3V455A1 a 3-Phase, Variable Speed Drive Automotive Power Module. This device, intended for 3-Phase motor control applications under 2kW, allows designers to reduce the overall system cost of higher power applications. This includes electric power steering (column-mount and rack-mount), electro-hydraulic power steering, electric water pumps, electric oil pumps and engine cooling fans. The FTCO3V455A1 allows these applications to deliver higher torque outputs. Additionally, power modules are more cost-effective than traditional solutions when all aspects of the power stage design (interconnections, mechanical, electrical and thermal) are considered. The FTCO3V455A1 automotive power module, through increased electronics integration, uses fewer components than discrete solutions and provides a compact system design that delivers better EMI performance. The integrated DC Bus high accuracy current sense resistor enables full control of the electric motor, while the NTC thermistor provides thermal protection. The module enables an extremely low electrical resistance path between the battery and motor, in addition to a complete separation of the control board from the high power stage. This provides high current handling capability at a reduced system cost. The module, measuring 44.00 x 29.00 x 5.00 mm, offers designers better EMC, >1.5KV in electrical isolation and lower motor ripple. Additionally, the module provides better system reliability and easier installation. Key Features: • Typical configuration: Full three phase motor drive inverter • Designed for Automotive 12V battery systems • Ratings: 40V / up to 130A Iphase RMS (with Tsink up to 100 degree C) • Increased Electronics Integration (lower number of components) • 1 percent tolerance DC Bus Current sensing and temperature sensing • Ultra-low total module resistances • Compact size • Lead-free Packaging and Pricing Information (in US 1,000 quantity pieces): Samples available upon request - Delivery 8-12 weeks ARO. Available in APMCB-AP19, the FTCO3V455A1 is priced at $57.25. Fairchild Semiconductor