Devices and systems for power conversion circuits

Patent metadata

Field	Value
Publication number	US-9105560-B2
Application number	US-201314105569-A
Country	US
Kind code	B2
Filing date	Dec 13, 2013
Priority date	Dec 21, 2012
Publication date	Aug 11, 2015
Grant date	Aug 11, 2015

Abstract

Devices and systems comprising driver circuits are disclosed for MOSFET driven, normally-on gallium nitride (GaN) power transistors. Preferably, a low power, high speed CMOS driver circuit with an integrated low voltage, lateral MOSFET driver is series coupled, in a hybrid cascode arrangement to a high voltage GaN HEMT, for improved control of noise and voltage transients. Co-packaging of a GaN transistor die and a CMOS driver die using island topology contacts, through substrate vias, and a flip-chip, stacked configuration provides interconnections with low inductance and resistance, and provides effective thermal management. Co-packaging of a CMOS input interface circuit with the CMOS driver and GaN transistor allows for a compact, integrated CMOS driver with enhanced functionality including shut-down and start-up conditioning for safer operation, particularly for high voltage and high current switching. Preferred embodiments also provide isolated, self-powered, high speed driver devices, with reduced input losses.

First claim

The invention claimed is:

1. A system comprising a cascode arrangement of a normally-on depletion mode high voltage GaN FET driven by a normally-off driver MOSFET, and a driver circuit;
wherein the GaN FET is fabricated on a first substrate die (GaN die) and the driver circuit comprises a CMOS driver circuit fabricated on a second substrate die (CMOS die), the driver MOSFET being integrated with the driver circuit;
the GaN die comprising an arrangement of a plurality of front-si…

Assignees

• Gan Systems Inc

Inventors

• Roberts John
• Klowak Greg

Classifications

• H10W90/766

  Electricity · mapped topic

• H10W74/00

  Electricity · mapped topic

• H10W72/884

  Electricity · mapped topic

• H10W72/877

  Electricity · mapped topic

• H10W72/871

  Electricity · mapped topic