Fairchild’s 3-Phase Variable-Speed Inverter Module Enables Higher-Torque Automotive Systems

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 developed the FTC03V455A1 a 3-phase, variable-speed drive automotive power module. This device, intended for motor control applications under 2kW, allows designers to reduce the overall system cost of higher power applications.

Targeted applications include electric power steering (column-mount and rack-mount), electro-hydraulic power steering, electric water pumps, electric oil pumps and engine cooling fans. The FTC03V455A1 allows these applications to deliver higher torque outputs. The FTC03V455A1 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.

Designed for automotive 12V battery systems, the FTC03V455A1 is rated for 40V and up to 130A /phase rms (with heatsink temperatures up to 100 degree C). These lead-free modules feature one percent tolerance dc-bus current sensing and temperature sensing. Available in APMCB-AP19, the FTC03V455A1 is priced at $57.25 each in lots of 1,000 pieces. Samples are available upon request.