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TI intros gate drivers for powers devices

Posted: 30 Apr 2012 ?? ?Print Version ?Bookmark and Share

Keywords:gate driver? power device? MOSFET? IGBT?

Texas Instruments Inc. (TI) has announced what it says is its first 4A/8A and 4A/4A single-channel, low-side gate drivers. According to the company, the devices cut switching loss of MOSFETs, IGBT power devices and wide band-gap power semiconductors such as GaN devices.

The UCC27511 and UCC27517 drivers, part of TI's new UCC2751x family, effectively replace discrete gate driver circuits that use bipolar junction transistors, stated the company. TI added that the products improve efficiency, reliability and power-density in applications such as off-line isolated power supplies, telecom modules, air conditioner systems, UPS and portable power tools.

The UCC27511 supports drive current capability up to 4A source/8A sink, while the UCC27517 supports a 4A source/sink peak-current pulses. The drivers offer fast typical propagation delay of 13ns and a 9ns/7ns rise and fall time, providing an extremely low pulse distortion, boasted TI.

Additionally, the products tout minimal switching loss of 0.375? (0.5? for UCC27517) pull-down resistance that reduces switching loss as the power switch transitions through the Miller Plateau and improves immunity to Miller turn-on events. Likewise, the devices support 4.5-18V operating voltages and electrical parameters ensured across -40C to 140C. Maximum input voltage independent of VDD simplifies bias supply architecture, added TI.

The UCC27511 is available in a 6-pin SOT-23 package with a suggested resale price of $0.60 each in 1,000-unit quantities. The UCC27517 is available in a 5-pin SOT-23 package with a suggested resale price of $0.49 each in 1,000-unit quantities.

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