Power Integrations, a maker of high-voltage power conversion ICs, has announced that its automotive-qualified InnoSwitch3-AQ flyback switcher IC family is now available. One version is rated to 900 V, providing headroom for 400 V and 800 V EV inverter, battery management and climate control applications. The InnoSwitch3-AQ family combines primary and secondary controllers, plus safety-rated feedback circuitry, into a single IC, allowing output voltage regulation, low component count and configuration options for operation over the 30 V to 1,200 V input range.

Marketing Manager Edward Ong said, “New 400 V system designs require higher operating voltages to account for fault conditions and transients. The new 900 V INN3996CQ ICs provide plenty of voltage headroom and meet AEC’s strict requirements, ensuring safe and reliable operation in demanding automotive applications. Using a StackFET approach, the new device is suitable for 900 V and greater bus designs.”

The constant-voltage-regulated AEC-Q100-qualified InnoSwitch3-AQ switcher ICs achieve up to 90% efficiency across the load range and consume less than 15 mW under no-load conditions. Output power is up to 20 W at 85° C ambient temperature and 400 VDC input for the 900 V family. Devices incorporate a multi-mode Quasi-Resonant (QR)/CCM/DCM flyback controller, 900 V switch, and Power Integrations’ high speed FluxLink communications link that enables accurate regulation in the compact InSOP24 package and provides reinforced isolation up to 5500 m altitude. InnoSwitch3-AQ ICs operate down to 30 VDC, enabling automotive designers to use the device in traction inverter emergency power supply applications.

Source: Power Integrations