Power Integrations, a provider of high-voltage integrated circuits for energy-efficient power conversion, has introduced a wide-creepage package option for its InnoSwitch 3-AQ flyback switcher IC for automotive applications.
The updated design features a 5.1 mm drain-to-source-pin creepage distance, eliminating the need for a conformal coating to comply with the IEC60664-1 standard for 800-V vehicles while simplifying manufacturing processes and improving system reliability.
The 1700 V-rated InnoSwitch 3-AQ ICs incorporate a silicon carbide (SiC) primary switch capable of delivering up to 80 watts of output power. This level of integration reduces the component count in high-voltage power supplies by up to 50%, optimizing space, enhancing reliability, and addressing component sourcing challenges. The IC’s increased drain-pin width provides additional robustness, making it ideal for eAxle automotive applications requiring high shock and vibration resistance.
The ICs are designed to start with as little as 30 volts on the drain without external circuitry, addressing critical safety requirements. Additional protection features include input under-voltage, output over-voltage, and over-current limiting. The synchronous rectification and multi-mode valley switching controller, supporting both DCM/CCM flyback modes, achieves efficiency levels exceeding 90% while consuming less than 15 mW at no load.
Target applications include battery management systems, µdc-dc converters, control circuits, and emergency power supplies within traction inverters. The new ICs also offer improved remote on/off functionality, enhancing their versatility in automotive environments.
The new InSOP-28G package further supports 1000 Vdc primary side operation while maintaining safe isolation of other pins, even in pollution degree 2 environments, ensuring compatibility with the next generation of EV bus voltages.
Filed Under: Technology News