4MHz to 15MHz Radhard Hybrid CMOS/GaN Buck Converter with 88.6 Percent Peak Efficiency

Abstract

This paper presents a hybrid CMOS/GaN buck converter that exhibits up to 88.6 percent measured peak efficiency operating at switching frequencies of 4MHz to 15MHz, with a high conversion ratio from an input voltage of 14V to an output of 1.5V (6A) / 5V (5A). This work presents an integrated CMOS gate driver solution in 0.35um CMOS. The CMOS integrated circuit (IC) includes the gate driver and the closed-loop controller for directly driving a GaN power stage. The presented controller technique uses voltage mode control with an innovative cascode driver architecture to allow 3.3V CMOS devices to effectively drive GaN devices that require 5V gate signal swing. Furthermore, the power converter is designed to operate under 400MRad of total dose, thus enabling its use in high-radiation environments.

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Document Details

Document Type
Technical Report
Publication Date
Mar 25, 2019
Accession Number
AD1075273

Entities

People

  • Ashwath Hegde
  • Jennifer Kitchen
  • Sule Ozev
  • Yu Long

Organizations

  • Arizona State University

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Amplifiers
  • Circuits
  • Control Systems
  • Conversion Ratio
  • Converters
  • Dead Time
  • Frequency
  • Generators
  • High Voltage
  • Inverters
  • Low Voltage
  • Power Converters
  • Power Electronics
  • Radiation
  • Regulators
  • Simulations
  • Switched Mode Power Supplies

Readers

  • Electrical Engineering
  • Integrated Circuit Design and Technology.