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High voltage IGBT control ICs with 30 percent fewer components

Posted: 17 Jun 2005 ?? ?Print Version ?Bookmark and Share

Keywords:international rectifier? ir? igbt control ic? gate driver ic? current sense interface ic?

Enables small circuits with full protectionInternational Rectifier (IR) unveiled a series of high voltage IGBT control ICs with a sophisticated set of protection functions, consisting of 1,200V and 600V gate driver ICs and current sense interface ICs. These new devices feature high noise immunity with up to 30 percent fewer components in half the footprint of comparable discrete optocoupler- or transformer-based solutions, said the company.

"This new suite of gate driver and sensor ICs made with IR's high voltage IC technology enables small circuits with full protection, including ground fault protection, which was once available only in high-end systems," said David Tam, VP of IR's Consumer and Industrial group. "These devices blaze a new path for low-end industrial or servo drives as well as cost-competitive appliances."

Power stages using IGBTs or MOSFETs must be protected from failures such as short circuits, over-current conditions and ground faults. In addition to protection circuits, the fault conditions must be detected or sensed to enable the protection functions. IR said their new line of driver ICs and sensor ICs fill this requirement, while reducing component count and simplifying circuits.

The five 1,200V gate drivers made with the company's HVIC technology include the IR22381 analog, three-phase IGBT gate driver, which is touted to be ten times faster than comparable optocoupler-based drivers; the IR2277 and IR22771 high speed, single-phase current sense interface ICs with synchronous sampling for motor drive applications; and the IR2214 and IR22141 gate drivers that are designed to drive single half-bridge circuits in power switching applications as well as three-phase 380Vac circuits at up to 50A at 80C.

600V HVICs
For appliance motor drives and a wide range of general-purpose inverter circuits, the 1,200V HVICs are available in 600V versions. The IR21381 is an analog three-phase driver, similar to the IR22381. The IR2177 and IR21771 are 600V versions of the IR2277 and IR22771. Rounding out the set, the IR2114 and IR21141 are 600V versions of the IR2214 and IR22141.

The new motor drive and sensor ICs are available immediately.

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