26 July 2022
Infineon’s CoolSiC devices support Delta’s bi-directional inverter
CoolSiC products from Infineon Technologies AG of Munich, Germany have been adopted by Delta Electronics (a Taiwan-based global provider of power and energy management solutions) to allow a step towards energy transition and carbon neutrality with green power. With the development of bi-directional inverters, a hybrid three-in-one system that integrates solar, energy storage and charging of electric vehicles (EV), Delta is enabling EVs to become a household emergency backup power.
The bi-directional inverter can be used to supply power to charge EVs and home batteries while acting as a backup power for unexpected outages and a high-efficiency green energy control core. Products from Infineon include the 1200V M1H CoolSiC EasyPACK 1B modules and 1200V CoolSiC D2PAK 7-pin, a surface-mount device. The integration of three applications is also reckoned to be a milestone. The three-in-one system was realized in a compact package of just 425mm x 865mm x160mm. With an output power of about 10kW, the system allows a maximum continuous current of 34A and achieves peak efficiencies of more than 97.5%.
“Infineon is a trusted brand that has been spearheading the development of power semiconductors and power efficiency for many years,” comments Raymond Lee, director of the Delta PV Inverter business unit. “With the company's devices, we were able to integrate three applications into one system, which allows us to take a giant leap toward green energy,” he adds.
“We look forward to a long-term collaboration between Infineon and Delta,” says Dr Peter Wawer, president of Infineon’s Industrial Power Control Division.
One of the essential elements for creating the three-in-one system includes the1200V M1H CoolSiC EasyPACK 1B module (F4-23MR12W1M1_B11) with integrated NTC temperature sensor and PressFIT contact technology. The module offers maximum flexibility and high current density. With what is claimed to be best-in-class package technology combined with CoolSiC MOSFETs, the module features a low-inductive design with minimal switching and conduction losses. Furthermore, high-switching-frequency operation is enabled on the customer side, which allows for smaller system designs. The EasyPACK module helps to optimize the development time and reduces the overall costs for the customer.
Several other components from Infineon are used in the system, including devices using CoolMOS C7 and TRENCHSTOP 5 IGBT (insulated-gate bipolar transistor) technologies. Additionally, the 1200V CoolSiC MOSFET (IMBG120R350M1H) in a surface-mounted device (SMD) package, the D2PAK 7-pin, is also a part of this system. This device uses .XT interconnection technology for what is said to be best-in-class thermal properties, as well as the Kelvin source concept. The MOSFETs ensure very low switching losses, improving the system’s efficiency.
The devices include a 3µs short-circuit resistance, and the MOSFETs provide full slew rate (dV/dt) control as well as a benchmark gate threshold voltage (VGS(th)) of 4.5V. They are also robust against parasitic turn-on and can be operated with a turn-off voltage of 0V. Furthermore, the MOSFETs contain a robust body diode that enables hard commutation. The package creepage and clearance distances are 6.1mm. Additionally, the SMD package allows direct integration into PCBs with natural convection cooling without additional heat sinks.