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Gate driver boosts robustness, reliability in motor drives

Posted: 20 May 2008 ?? ?Print Version ?Bookmark and Share

Keywords:three-phase gate driver? power MOSFET? motor drives?

International Rectifier has introduced a rugged 600V three-phase gate driver IC for low-, mid- and high-voltage motor drive applications including Permanent Magnet (PM) motor drives for appliances, industrial drives, micro inverter drives and electric vehicle drives.

The IRS26310DJPbF integrates power MOSFET and IGBT gate drivers with three high-side and three low-side referenced output channels to provide 200mA/350mA drive current at up to 20V MOS gate drive capability operating up to 600V. The IC incorporates an integrated bootstrap diode and offers a comprehensive set of protection features including improved negative voltage spike immunity to protect the system from catastrophic events seen during high-current switching and short-circuit conditions, to achieve high levels of robustness and reliability. An advanced input filter is also integrated to reject noise and reduce distortion to improve system performance.

"With its comprehensive protection features including DC bus sensing and negative Vs immunity, the IRS26310D is well suited for three-phase inverter designs that require a robust, reliable design in a small footprint," said Henning Hauenstein, VP of product marketing for IR's automotive, appliance and industrial motion products.

Application-specific protection features include DC bus sensing with overvoltage protection and a zero vector braking function for PM motor drives. A current trip function, which terminates all six outputs, is derived from an external current sense resistor and an enable function is available to terminate all six outputs simultaneously.

The device's output drivers feature a high pulse current buffer stage designed for minimum driver cross-conduction. Propagation delays are matched to simplify use in high frequency applications.

The IC utilizes IR's advanced high-voltage IC (HVIC) process that incorporates next-generation high-voltage level-shifting and termination technology to deliver superior electrical overstress protection and higher field reliability. In addition to the overcurrent and overtemperature detection input, the IRS26310D features undervoltage lock-out protection, integrated deadtime protection, shoot-through protection, a shutdown input, fault-reporting and is compatible with 3.3V input logic.

Available in 44-pin PLCC, pricing for the IRS26310D begins at $2.32 each in quantities of 100,000 units. Production quantities are available immediately. The devices are RoHS-compliant and prices are subject to change.

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