TI unveils compact high-speed, single-channel gate drivers for high-density switching power designs

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

Among the devices’ key technical features are: the UCC27511 supports drive current capability up to 4-A source/8-A sink, while the UCC27517 supports a 4-A source/sink peak-current pulses; both drivers have a fast typical propagation delay of 13 nanoseconds (ns) and a 9-ns/7-ns rise and fall time, providing an extremely low pulse distortion; and 0.375 ohm (0.5 ohm for UCC27517) pull-down resistance minimizes switching loss as the power switch transitions through the Miller Plateau and improves immunity to Miller turn-on events.

Both devices also offer improved design flexibility, supporting 4.5-V to 18-V operating voltages and electrical parameters across -40C to 140C. Also maximum input voltage independent of VDD simplifies bias supply architecture.

Texas Instruments

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