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Texas Instruments LMG3526R050 650V GaN FET

Texas Instrument LMG3526R050 650V GaN FET with integrated driver and protection targets switch-mode power converters and enables designers to achieve new power density and efficiency levels. The LMG3526R050 integrates a silicon driver that enables switching speeds up to 150V/ns. TI offers integrated precision gate bias, resulting in higher switching SOA than discrete silicon gate drivers. This integration, combined with TI’s low-inductance package, delivers minimal ringing and clean switching in hard-switching power supply topologies. The adjustable gate drive strength allows control of the slew rate from 15V/ns to 150V/ns. This control can be used to control EMI and actively optimize switching performance.

Advanced features include digital temperature reporting, fault detection, and zero-voltage detection (ZVD). The temperature of the GaN FET is reported through a variable duty cycle PWM output. Faults reported include overtemperature, overcurrent, and UVLO monitoring. ZVD feature can provide a pulse output from the ZVD pin when zero-voltage switching (ZVS) is realized.

Features

  • 650V GaN-on-Si FET with integrated gate driver
    • Integrated high precision gate bias voltage
    • 200V/ns FET hold-off
    • 3.6MHz switching frequency
    • 15V/ns to 150V/ns slew rate for optimization of switching performance and EMI mitigation
    • Operates from 7.5V to 18V supply
  • Advanced power management
    • Digital temperature PWM output
  • Zero-voltage detection feature that facilitates soft-switching converters
  • Robust protection
    • Cycle-by-cycle overcurrent and latched short-circuit protection with < 100ns response
    • Withstands 720V surge while hard-switching
    • Self-protection from internal overtemperature and UVLO monitoring
  • Top-side cooled 12mm × 12mm VQFN package separates electrical and thermal paths for lowest power loop inductance

Applications

  • Switch-mode power converters
  • Merchant network and server PSU
  • Merchant telecom rectifiers
  • Solar inverters and industrial motor drives
  • Uninterruptible power supplies

Simplified Block Diagram

Block Diagram - Texas Instruments LMG3526R050 650V GaN FET

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Publicado: 2024-01-29 | Actualizado: 2024-07-25