A GaN-on-Si-Based Logic, Driver and DC-DC Converter Circuit with Closed-Loop Peak Current-Mode Control

Conference: PCIM Europe 2019 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/07/2019 - 05/09/2019 at Nürnberg, Deutschland

Proceedings: PCIM Europe 2019

Pages: 6Language: englishTyp: PDF

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Authors:
Basler, Michael; Moench, Stefan; Reiner, Richard; Waltereit, Patrick; Quay, Ruediger; Ambacher, Oliver (Fraunhofer Institute for Applied Solid State Physics (IAF), Germany)
Kallfass, Ingmar (Institute of Robust Power Semiconductor Systems (ILH), University of Stuttgart, Germany)

Abstract:
This work presents an entirely GaN-implemented DC-DC converter circuit with closed-loop peak currentmode control. The circuit combines logic inverter, level-shifter, differential amplifier, comparator, NOR-gate, RS flip-flop, power transistor with integrated gate driver, and power diode, all based on a d-mode GaN-on-Si technology. A prototype converter (200-to-100 V, 500 kHz, 100 W, 97% efficiency) was designed and characterized. The GaN-based control circuit requires only 0.5% active chip area compared to the GaN-based driver and power devices. Thus, the work demonstrates that the addition of basic logic circuits in GaN power ICs enables a high gain in functionality at negligible additional area requirement.