As automotive design engineers seek new capabilities in SiC/GaN technology to address the higher voltage requirements in advanced electric vehicles, Yageo has expanded its line of SiC/GaN drive LLC transformers by introducing a new model that employs triple-insulated wire to extend the voltage rating.
Also suitable for industrial applications, the PHT7249 NL is similar to Yageo’s recently released PMT6907NL, which can be configured with LLC controllers to provide positive and negative outputs for robust switch on/off. The new transformer offers high isolation (4.2KV Hi-Pot) in a compact (17.2x11x8.5mm max) SMD platform, delivering up to 3W of drive power. A key enhancement is the use of triple-insulated wire to extend the voltage rating up to 1250Vpk. LLC transformers typically have two inductors (L) and a capacitor (C) to create resonance at the switching frequency.
“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,” explains Gerard Healy, product marketing manager for the Specialized Power business unit. “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.”
Designed for a cutting-edge E-Sports motor drive application, the s new transformer is compliant with the requirements of IEC 60664, for basic insulation and a repetitive peak voltage up to 1250Vpk. 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 is the parent company of Pulse Electronics. See www.pulseelectronics.com.
