US-based Power Integrations, which produces high-voltage integrated circuits for energy-efficient power conversion, has introduced a wide-creepage package option for its InnoSwitch3-AQ flyback switcher IC for automotive applications.
A wide drain-to-source-pin creepage distance of 5.1 mm eliminates the need for conformal coating, making the IC compliant with the IEC60664-1 standard in 800 V vehicles while simplifying manufacturing and increasing system reliability.
The 1,700 volt-rated CV/CC InnoSwitch3-AQ switching power supply ICs incorporate a silicon carbide (SiC) primary switch capable of delivering up to 80 watts of output power. The highly integrated ICs reduce the number of components required to implement a power supply by as much as 50%, saving space, enhancing system reliability and mitigating component sourcing challenges, according to the company. An increased drain-pin width assists in withstanding high levels of shock and vibration, especially in eAxle automotive applications.
Target automotive applications include battery management systems, µDC-DC converters, control circuits and emergency power supplies in the main traction inverter.
The new ICs in the range start up with as little as 30 V on the drain without external circuitry—which is critical for functional safety. Additional protection features include input under-voltage, output overvoltage and overcurrent limiting.
“Automotive designers rely on the efficiency and low component count of high-voltage power supplies designed around InnoSwitch3-AQ ICs. The increased primary-to-primary creepage and clearance distance between the drain and source pins in the new package provides support for the next generation of EV bus voltages,” said Mike Stroka, product marketing engineer at the company. “Power Integrations’ InSOP™-28G package enables 1,000 VDC to be provided to the primary side, while keeping all other pins safely isolated in pollution degree 2 environments.”
Source: Power Integrations
