YAGEO Group is excited to expand its SiC/GaN drive LLC transformers by introducing the PHT7249NL , suitable for industrial and automotive applications. Similar to the recently released PMT6907NL , which can be configured with LLC controllers such as the TI UCC25800-Q1 to provide positive and negative outputs for robust switch on/off, this transformer offers high isolation (4.2KV Hi-Pot) in a compact (17.2x11x8.5mm max) SMD platform, delivering up to 3W of drive power. The enhancement to the earlier product offering is the use of Triple Insulated Wire to extend the voltage rating up to 1250Vpk. PHT7249NL can be applied in systems working up to 3500m altitude without additional limitations. The product is optimized to utilize all features of TI UCC25800-Q1 or equivalent controller working within a whole switching frequency range.
“We were delighted with the market’s reaction to our new LLC transformer as hardware engineers look to utilize the benefits of the SiC/GaN drive topology to meet their power efficiency targets. However, as battery voltages increase to 800V and beyond, a higher voltage-rated solution was required. The extended creepage distance of our innovative UI5 platform already satisfies the safety requirements for basic insulation for these higher voltages. However, enhanced wire insulation was needed for a comparable voltage rating.
This new transformer is compliant with the requirements of IEC 60664, for basic insulation and a repetitive peak voltage up to 1250Vpk, based on the partial discharge method. Further information is available in our white paper “ Partial Discharge Explained ” to better understand how this test method is used to define the voltage rating of an insulation barrier.
Gerard Healy Product Marketing, Specialized Power PBU
PHT7249NL was designed for a cutting-edge E-Sports motor drive application operating from an 800V battery voltage. The 10 mm creepage distance complies with IEC 61558-1 for basic insulation and a working voltage of up to 1000Vrms. The new extended creepage UI5 platform is one of several high-isolation platforms developed by YAGEO Group, which are available in our High Isolation Transformer Platform Guide .
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