LMG5200 80 V GaN Half-Bridge Power Stage

LMG5200 80 V GaN Half-Bridge Power Stage

Texas Instruments' LMG5200 device, an 80 V, 10 A driver plus GaN half-bridge power stage, provides an integrated power stage solution using enhancement-mode Gallium Nitride (GaN) FETs. The device consists of two 80 V GaN FETs driven by one high-frequency GaN FET driver in a half-bridge configuration.

GaN FETs provide significant advantages for power conversion as they have near zero reverse recovery and very small input capacitance CISS. All the devices are mounted on a completely bond-wire free package platform with minimized package parasitic elements. The LMG5200 device is available in a 6 mm x 8 mm x 2 mm lead-free package and can be easily mounted on PCBs.

The TTL logic compatible inputs can withstand input voltages up to 12 V regardless of the VCC voltage. The proprietary bootstrap voltage clamping technique ensures the gate voltages of the enhancement mode GaN FETs are within a safe operating range.

The device extends advantages of discrete GaN FETs by offering a more user-friendly interface. It is an ideal solution for applications requiring high-frequency, high-efficiency operation in a small form factor. When used with the TPS53632G controller, the LMG5200 enables direct conversion from 48 V to point-of-load voltages (0.5 V to 1.5 V).

Features
  • Integrated 15 mΩ GaN FETs and driver
  • 80 V continuous, 100 V pulsed voltage rating
  • Package optimized for easy PCB layout, eliminating need for underfill, creepage, and clearance requirements
  • Very low common source inductance to ensure high slew rate switching without causing excessive ringing in hard-switched topologies
  • Ideal for isolated and non-isolated applications
  • Gate driver capable of up to 10 MHz switching
  • Internal bootstrap supply voltage clamping to prevent GaN FET overdrive
  • Supply rail undervoltage lockout protection
  • Excellent propagation delay (29.5 ns typical) and matching (2 ns typical)
  • Low power consumption
Applications
  • Wide VIN multi-MHz synchronous buck converters
  • Class D amplifiers for audio
  • High power density single- and three-phase motor drive
  • 48 V point-of-load (POL) converters for telecom, industrial, and enterprise computing

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