semiconductor

SiC JFET(1700V)：Power Integrations INN3949CQ Structure Analysis Report


		SiC
Package	X-ray	JFET	LDMOS

Overview

　INN3949CQ-TL, released by Power Integrations (PI) in February 2022, is an automotive flyback converter IC with a built-in 1700V withstand voltage SiC JFET. PI utilizes its patented FluxLink technology to adopt SiC JFET in a “unique” SiP configuration. This IC is used for power supplies in vehicle subsystems such as traction inverters, emergency power supplies (EPS), DC/DC converters (APM) from high voltage

to low voltage, battery management systems, and vehicle chargers.

Product features

Model Number： INN3949CQ-TL　Series Name 「InnoSwitch3-AQ」
Product Release Date: February 2022
Automotive flyback converter IC

Report Contents (64 pages)

This report reveals the structure and implementation of PI’s INN3949CQ product, a high-integration system-in-package (SiP) product that incorporates a 1700V SiC JFET and primary and secondary side control ICs.

Package and mounting technology
Structural analysis of the SiC JFET die

・Die observation (Die photos, layout, size, structure)

★Identification of the JFET (manufacturer, model number, etc.) and its correlation with electrical characteristics (BVdss)

Low-voltage Si MOSFET: Die photos, size, cross-section (number of metal layers)
Control IC: Die photos, size, cross-section (number of metal layers), process node

A normally-on SiC JFET is used.

The process node is estimated from the Gate Pitch and contact diameter of the control IC.