Power Integrations, a developer of high-voltage integrated circuits for energy-efficient power conversion, has announced five new reference designs for 800-V electric vehicle (EV) applications.
The designs are based on the company’s 1700-V InnoSwitch 3-AQ flyback switcher ICs and span power levels from 16 to 120 W. They’re intended for automotive uses such as dc-dc bus conversion, inverter emergency power, battery management, and auxiliary system power supplies.
The designs incorporate wound and low-profile planar transformers and use the new wide-creepage InSOP-28G package, which supports 1000 Vdc on the primary side and maintains creepage and clearance appropriate for pollution degree 2 environments.
The InSOP-28G package includes a 5.1 mm drain-to-source creepage distance to improve safety and reliability in high-voltage systems. It also eliminates conformal coating in some applications, potentially simplifying manufacturing and validation.
The 1700-V silicon-carbide (SiC) InnoSwitch3-AQ IC supports efficient, real-time power delivery for 800-V EV platforms.
The following reference designs and design examples are based on these ICs:
- RDK-994Q — 35-W ultra-low-profile traction inverter gate-drive or emergency power supply with 40–1000 Vdc input and 24 V output
- RDK-1039Q — 18-W power supply with planar transformer for inverter gate drivers or EPS
- RDK-1054Q — 120-W power supply with planar transformer, designed to reduce or eliminate traditional 12-V batteries
- DER-1030Q — 20-W four-output supply: one EPS (24.75 V) and three gate-drive outputs (25.5 V)
- DER-1045Q — 16-W four-output supply: one 14 V EPS and three gate-drive outputs with +18-V / –5 V rails
The 1700-V InnoSwitch3-AQ ICs used in these designs deliver up to 120 W of output power. They integrate features such as synchronous rectification, valley switching, and DCM/CCM flyback control, achieving over 91% efficiency.
The ICs also start with as little as 30 V on the drain pin — relevant for safety and cold-start conditions — and include protections for under-voltage, over-voltage, and over-current. No-load power consumption is under 15 mW.
These designs are intended to support the transition to high-voltage EV platforms by offering compact, efficient, and safety-aligned power supply options for various onboard systems.
Filed Under: Technology News