Focus MOSFET application – Electric Power Steering

Flexible packaging solutions with guaranteed repetitive avalanche capability

Electric power steering (EPS) systems amplify the driver’s steering responses to make steering easier.

EPS systems often use brushless DC motors to provide the additional torque to the steering system for their compact size and lower system cost compared to equivalent mechanical solutions. They also provide improved performance, longer lifetimes, reduced noise, increased reliability and ease of installation.

Motor power depends on vehicle size and performance. MOSFETs are configured in 3-phase bridge arrangements to drive the BLDC motor.

The system must be capable of handling worst-case current and thermal surges caused by the torque assistant pulses.

Key MOSFET Requirements:

  • Low on-resistance
  • Low thermal resistance
  • High surge current capacity
  • Flexible packaging solutions
  • Guaranteed repetitive avalanche capability



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D2PAK are ideally suited to provide high power density and surge current capability required for power steering systems.

Main benefits:

  • Lowest on-resistance
  • Lowest thermal resistance
  • Highest current handling capability
  • Guaranteed repetitive avalanche rating

I2PAK & TO-220 provide flexible solutions for power steering systems where through-hole mounting is adopted.

Main benefits:

  • Separate current and thermal paths
  • Clamp, screw or solder mounting
  • Low on-resistance
  • High current handling capability

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Focus MOSFET application – Electric Power Steering
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Products

Type number Description Status Quick access
BUK753R1-40E N-channel TrenchMOS standard level FET Production
BUK761R6-40E N-channel TrenchMOS standard level FET Production
BUK761R7-40E N-channel TrenchMOS standard level FET Production
BUK762R0-40E N-channel TrenchMOS standard level FET Production
BUK762R9-40E N-channel TrenchMOS standard level FET Production
BUK763R8-80E N-channel TrenchMOS standard level FET Production
BUK764R0-40E N-channel TrenchMOS standard level FET Production
BUK7E1R9-40E N-channel TrenchMOS standard level FET Production

Documentation

File name Title Type Date
compleet_1_steer Steer Marcom graphics 2015-03-17

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