Switcher Ref Designs Bring Reliability and Space Savings to 800-V BEVs
Five new reference designs from Power Integrations, targeting 800-V battery-electric-vehicle (BEV) applications, are based on the company’s 1,700-V InnoSwitch 3-AQ flyback switcher ICs. Spanning power levels from 16 to 120 W, the designs leverage both wound and low-profile planar transformers. Automotive apps include DC-DC bus conversion, inverter emergency power, battery management, and power supplies for auxiliary systems.
The designs feature PI’s new wide-creepage InSOP-28G package, which supports 1,000 V DC on the primary side while providing appropriate creepage and clearance between pins in pollution degree 2 environments.
The three reference-design kits (RDKs) and two design example reports (DERs) include:
- RDK-994Q: 35-W, ultra-low-profile, traction-inverter gate drive or emergency power supply (EPS) with 40- to 1000-V DC input and 24-V output.
- RDK-1039Q: 18-W power supply with planar transformer for traction-inverter gate driver or emergency power supply.
- RDK-1054Q: 120-W power supply with planar transformer, designed to shrink or eliminate heavy, bulky 12-V batteries.
- DER-1030Q: 20-W four-output power supply—one EPS with 24.75-V output and three gate-drive power supplies with 25.5-V output.
- DER-1045Q: 16-W four-output power supply—one 14-V EPS output and three gate-drive outputs with split +18-V/−5-V rails.
The SiC-based CV/CC InnoSwitch3-AQ switching power-supply ICs deliver up to 120 W of output power and can start up with as little as 30 V on the drain pin without external circuitry. The ICs also incorporate synchronous rectification and a valley switching, discontinuous/continuous conduction mode (DCM/CCM) flyback controller capable of delivering greater than 91% efficiency.
Availability & Resources
Pricing for the 1,700-V-rated InnoSwitch3-AQ ICs starts at $6 per unit for 10,000-unit quantities. The reference design kits range from $50 to $100 per kit. Design engineers can enter a drawing to win one of the reference design kits by clicking here.
