Power Integrations Introduces 1700V Switch ICs for 800V EV Applications

Five New Reference Designs Showcase the Capabilities of InnoSwitch™3-AQ Flyback ICs in Wide-Creepage InSOP™-28G Packages

Nuremberg, Germany – PCIM 2025, May 2025 – Power Integrations (Nasdaq: POWI), a leading innovator in high-voltage integrated circuits for energy-efficient power conversion, today announced five new reference designs tailored for 800V electric vehicle (EV) systems. These designs are based on the company’s 1700V-rated InnoSwitch™3-AQ flyback switcher ICs, optimized for demanding automotive applications such as DC-DC bus conversion, inverter emergency power supplies, battery management systems, and auxiliary power supplies.

All five designs leverage Power Integrations' proprietary InSOP™-28G packaging, engineered for wide creepage distances and enhanced high-voltage safety. This package supports up to 1000VDC on the primary side and provides compliant creepage and clearance distances for Pollution Degree 2 environments, eliminating the need for conformal coating and simplifying system certification and manufacturing.

Enhanced Safety and Integration for Next-Generation EVs

According to Mike Stroka, Product Marketing Engineer at Power Integrations, “The InSOP™-28G package offers a 5.1 mm creepage distance between drain and source pins, aligning with stringent safety and reliability requirements in high-voltage automotive applications. By eliminating the need for conformal coating, manufacturers can streamline production and reduce associated costs and qualification steps.”

Each InnoSwitch3-AQ IC integrates a 1700V silicon carbide (SiC) primary switch, delivering high efficiency and robustness ideal for 800V EV platforms. These ICs help engineers improve system performance and reliability while reducing PCB space and component count.

Overview of New Reference Designs

All designs use InnoSwitch3-AQ constant-voltage/constant-current flyback ICs and are available for download from power.com. The reference designs include:

· RDK-994Q: A 35W ultra-thin isolated power supply suitable for traction inverter gate drivers or emergency power systems. Operates from 40–1000VDC input and outputs 24V.

· RDK-1039Q: An 18W compact design utilizing a planar transformer, ideal for traction inverter gate drivers or backup power.

· RDK-1054Q: A high-power 120W planar transformer design aimed at minimizing or eliminating the need for bulky 12V lead-acid batteries.

· DER-1030Q: A 20W four-output design including a 24.75V emergency power rail and three 25.5V outputs for gate driver circuits.

· DER-1045Q: A 16W four-output design delivering one 14V emergency rail and three gate drive outputs with ±18V/-5V voltages.

Key Features and Performance Advantages

· High Output Power: Up to 120W from a single compact IC.

· High Integration: Reduces BOM count by up to 50%, saving board space and simplifying sourcing.

· Low Start-Up Voltage: Starts from as low as 30V, eliminating the need for external circuitry—a key requirement for functional safety.

· Efficiency: Achieves over 91% efficiency using a DCM/CCM flyback topology with synchronous rectification and valley switching.

· Comprehensive Protection: Includes input undervoltage lockout, output overvoltage protection, overcurrent limiting, and ultra-low no-load power consumption (<15mW).

Availability and Pricing

The 1700V InnoSwitch3-AQ ICs are available now, priced at $6 each in 10,000-unit quantities. Reference design kits range from $50 to $100. Engineers can enter to win a kit at pages.power.com/rev-up. For purchasing or additional technical information, contact Power Integrations’ sales representatives or authorized global distributors such as DigiKey, Newark, Mouser, and RS Components.

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