Power Integrations, which supplies high-voltage integrated circuits (ICs) for power conversion, is offering five new reference designs targeting 800 V automotive applications, based on its 1,700 V InnoSwitch3-AQ flyback switcher ICs.
Spanning power levels from 16 W to 120 W, the designs use wound and low-profile planar transformers and target automotive applications such as DC-DC bus conversion, inverter emergency power, battery management and power supplies for auxiliary systems.
The three reference design kits (RDKs) and two design example reports (DERs) are:
- RDK-994Q — 35 W ultra-low-profile traction inverter gate-drive or emergency power supply with 40-1,000 VDC 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 emergency power supply (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 with +18 V / -5 V rails.
The designs feature the company’s new wide-creepage InSOP-28G package, which supports 1,000 VDC on the primary side while providing appropriate creepage and clearance between pins in pollution degree 2 environments.
The highly integrated ICs reduce power supply bill of materials (BOM) count by as much as 50%, according to the company, saving space, increasing system reliability and easing component sourcing challenges.
Devices start up with as little as 30 V on the drain pin without external circuitry for functional safety. Additional protection features include input undervoltage, output overvoltage and overcurrent limiting.
Power consumption is less than 15 mW at no-load. 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.
“The new InSOP-28G package, with its wide 5.1 mm drain-to-source pin creepage distance, addresses the critical need for enhanced safety and reliability in high-voltage applications,” said Mike Stroka, product marketing engineer at Power Integrations. “It provides sufficient isolation that conformal coating can be eliminated, saving a manufacturing process step and associated qualification effort. The InnoSwitch3-AQ IC, featuring a 1,700 V silicon-carbide (SiC) switch, is an ideal solution for 800 V vehicles, simplifying manufacturing while enhancing overall system performance and reliability.”
Source: Power Integrations
