New Highly Integrated Flyback Switcher IC
POWER INTEGRATIONS announced the production release of the InnoSwitch™3-AQ, an AEC-Q100-qualified flyback switcher with integrated 750V MOSFET and secondary-side sensing. The newly qualified device family targets automotive EV applications, such as traction inverter, OBC (On-Board Charger), EMS (energy management DC/DC bus converters) and BMS (Battery Management Systems).
The InnoSwitch™3-AQ uses POWER INTEGRATIONS’ high-speed FluxLink™ coupling to achieve ±3% accuracy for combined line and load regulation while eliminating both dedicated isolated transformer sense-windings and optocouplers. FluxLink technology maintains output voltage regulation even under the transient stress test, which is particularly challenging for PSR-based implementations. The integrated 750V MOSFET meets stringent automotive de-rating requirements, and an on-chip synchronous rectifier controller delivers above 90% efficiency at the nominal 400VDC input voltage. Optimized InnoSwitch™3-AQ designs achieve less than 10mW no-load energy usage across the input voltage range. The InnoSwitch3™-AQ family ICs are packaged in a surface-mount InSOP with 11mm primary to secondary creepage, which exceeds the stringent requirements for high altitude (> 5000m) isolation.
The RDR-840Q reference design kit incorporating the newly released IC demonstrates start-up, shutdown and efficient operation from 30VDC to 550VDC input, as well as fast transient response and a variety of safety and protection features.
InnoSwitch3-AQ ICs are available in the InSOP-24D package.