Power Integrations Supports Electric Vehicle Designs with New AEC-Q100 Certified 900 V InnoSwitch3-AQ Flyback Switcher ICs

5 MAY 2021

InnoSwitch3-AQ ICs are up to 90% efficient with low 15 mW no-load power consumption and increased voltage margin for 400 V and 800 V batteries

Power Integrations (Nasdaq: POWI), the leader in high-voltage integrated circuits for energy-efficient power conversion, today announced that its automotive-qualified InnoSwitch3™-AQ flyback switcher IC family is now available with a member rated to 900 V, providing greater headroom for 400 V and 800 V electric vehicle 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. This allows accurate output voltage regulation, low component count and configuration options for operation over the ultra-wide input voltage range of 30 V to 1200 V.

Edward Ong, Senior Product Marketing Manager at Power Integrations said: “New 400 V system designs for electric vehicles require higher operating voltages to account for fault conditions and transients. The new 900 V INN3996CQ ICs provide plenty of voltage headroom and meet the Automotive Electronics Council strict requirements for qualification ensuring safe and reliable operation in the demanding automotive application. Using a StackFET approach, the new device is suitable for 900 V and greater bus designs.”

The constant voltage (CV) 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.

InnoSwitch3-AQ family devices include multiple protection features for automotive applications including input over-voltage and under-voltage protection, output over-voltage and over-current limiting, and over-temperature shutdown.

Availability & Resources

A new design reference, DER-889Q, is available that describes a 15 W power supply that supports 30 VDC to 1200 VDC input and 12 V / 1.25 A output. Another resource, the 30 VDC to 921 VDC DER-859Q describes the operation of InnoSwitch3-AQ in 800 V bus applications delivering up to 30 W. Both designs employ PI’s StackFET technology. The additional circuitry may be omitted for 400 VDC designs. The new InnoSwitch3-AQ INN3996CQ ICs are priced at $2 in volume product quantities.

Power Integrations

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