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Texas Instruments UCC27511A High-Speed Low-Side Gate Driver

Texas Instruments UCC27511A High-Speed Low-Side Gate Driver is a compact gate driver that offers superior replacement of NPN and PNP discrete driver (buffer circuit) solutions. The UCC27511A is rated for MOSFETs, IGBTs, and emerging wide band gap power devices such as GaN. The device features fast rise times, fall times, and propagation delays, making the Texas Instruments UCC27511A device suitable for high-speed applications. Its asymmetrical 4A peak source and 8A peak sink currents boost immunity against the parasitic Miller turn-on effect. The split output configuration enables easy and independent adjustment of rise and fall times using only two resistors, eliminating the need for an external diode. Features including wide input hysteresis and negative input voltage handling enhance transient immunity.

Features

  • Input pins capable of withstanding –5V below GND pin
  • Low-cost gate-driver device offering superior replacement of NPN and PNP discrete solutions
  • Strong sink current offers enhanced immunity against Miller turn-on
  • Split output configuration (allows easy and independent adjustment of turn-on and turn-off speeds)
  • Fast propagation delays (13ns typical)
  • Fast rise and fall times (9ns and 7ns typical)
  • 4.5 to 18V single supply range
  • Outputs held low during VDD UVLO (ensures glitch-free operation at power up and power down)
  • TTL and CMOS compatible input-logic threshold (independent of supply voltage)
  • Wide hysteresis (1V typical) for high-noise immunity
  • Dual-input design (choice of an inverting (IN– pin) or non-inverting (IN+ pin) driver configuration)
    • An unused input pin can be used to enable or disable function
  • Output is held low when input pins are floating
  • Input pin absolute maximum voltage levels not restricted by VDD pin bias supply voltage

Applications

  • Switch-mode power supplies
  • DC-to-DC converters
  • Companion gate-driver devices for digital power controllers
  • Solar power, motor control, UPS
  • Gate driver for emerging wide band gap power devices (such as GaN)

Functional Block Diagram

Block Diagram - Texas Instruments UCC27511A High-Speed Low-Side Gate Driver
Inilathala: 2018-06-13 | Na-update: 2023-02-20