Bidirectional switch and current sensing for power electronics in USB-C chargers introduced by Infineon
MUNICH – Infineon Technologies AG in Munich is introducing the CoolGaN bidirectional switch and CoolGaN Smart Sense power electronics devices for mobile device USB ports, battery management systems, inverters, rectifiers, and consumer USB-C chargers and adapters.
CoolGaN bidirectional switch provides soft- and hard-switching, with bidirectional switches available at 40, 650, and 850 volts. The CoolGaN Smart Sense products feature lossless current sensing and transistor switch functions integrated into one package.
The CoolGaN bidirectional switch high voltage will be available at 65 and 850 volts and feature a normally-off monolithic bi-directional switch with four modes of operation.
The devices have two separate gates with substrate terminal and independent isolated control. They use the same drift region to block voltages in both directions under repetitive short-circuit conditions.
Designers can use one bidirectional switch instead of four conventional transistors for efficiency, density, and reliability. The devices optimize performance in the replacement of back-to-back switches in single-phase H4 PFC and HERIC inverters and three-phase Vienna rectifiers.
The CoolGaN bidirectional switch 40-volt device is a normally-off, monolithic bi-directional switch based on Schottky Gate GaN technology. It can block voltages in both directions, and through a single-gate and common-source design, it is optimized to replace back-to-back MOSFETs used as disconnect switches in battery-powered consumer products.
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The first 40 V CoolGaN bidirectional switch product has a 6 mO R DS(on), with a range of products to follow. Benefits of using 40 V GaN bidirectional switch vs. back-to-back Si FETs include 50 – 75 percent PCB area savings and a reduction of power losses by more than 50 percent, all at a lower cost.
The CoolGaN Smart Sense products feature 2-kilovolt electrostatic discharge withstand and can connect to controller current sense for peak current control and overcurrent protection. The current sense response time is 200 nanoseconds, which is equal or less than common controller blanking time for ultimate compatibility.
For more information contact Infineon online at www.infineon.com/cms/en/product/promopages/GaN-innovations/.
