IGBTs are optimised for soft switching in efficient home appliances
Resonant converters’ efficiency can be increased, claims STMicroelectronics, by the STGWA40IH65DF and STGWA50IH65DF 650V STPower IGBTs. They are claimed to increase the energy efficiency of resonant converters in the 16 to 60kHz switching frequency range.
The STGWA40IH65DF and STGWA50IH65DF extend ST’s trench field-stop (TFS) IGBTs for soft-switching applications, which currently include the HB and HB2 series for power supplies, welders, and solar converters. The IH series devices are fine-tuned for the half-bridge circuits of appliances such as induction cookers and other soft-switching applications. Product designers can now choose these IGBTs to target superior energy ratings.
Rated for 40 and 50A respectively, the STGWA40IH65DF and STGWA50IH65DF serve applications up to 4kW. They have a low saturation voltage (VCE(sat)) of 1.5V (typical at nominal current) and a low-drop voltage free-wheeling co-packaged diode. According to ST, these IGBTs combine outstanding conduction performance with low turn-off losses of just 0.19mJ (typical) in the 40A STGWA40IH65DF.
IH-series IGBTs are specified up to the maximum junction temperature of 175 degrees C and feature low thermal resistance and a positive temperature coefficient of VCE(sat) for enhanced reliability.
The STGWA40IH65DF and STGWA50IH65DF IGBTs are available now in the TO-247 long-lead power package. ST says it will soon add 20 and 30A variants, in TO-247 long lead and TO-220 packages.
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