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Automotive ICs increase efficiency of hybrid vehicle

16 Apr 2012

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durability requirements.

Fairchild Semiconductor has developed the FAN7171 high-current, high-side gate driver IC, and the FAN7190 high-current, high- and low-side gate driver IC. The automotive high voltage ICs (HVIC) gate drivers are ideal for electric and hybrid electric DC-DC power supplies and inverters. They are also suitable for diesel and gasoline injectors and valves as well as MOSFET and IGBT high-side driver applications.

The FAN7171 and FAN7190 HVIC devices deliver an integrated inverter solution with higher efficiency, more drive current and robustness in harsh automotive applications. The first is a monolithic high-side gate driver IC that can drive high speed MOSFETs and IGBTs that operate up to +500V, while the second can drive MOSFETS and IGBTs that operate up to +600V. Greater drive capability enables higher power systems with an increase in power efficiency.

Both devices have a buffered output stage with all NMOS transistors designed for high pulse current driving capability and minimum cross-conduction. Better noise immunity, with a negative voltage swing (VS) down to -9.8V at 15V VBS, allows for improved design reliability and increased durability in challenging noise environments.

Fairchild's high voltage process and common-mode noise cancelling techniques provide stable operation of the high-side driver under dv/dt noise circumstances. An advanced level shift circuit offers high-side gate driver operation down to VS = -9.8V (typical) for VBS = 15V. An Under Voltage Lockout (UVLO) circuit prevents malfunction when VBS is lower than the specified threshold voltage.

Both devices are packaged in an 8-lead small outline package (SOP) and are RoHS-compliant.

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