900V Isolated Power ICs target Industrial and Three-Phase Designs

Power Integrations announced the addition of a 900V device to its InnoSwitch™-EP family of off-line CV/CC flyback switcher ICs. The new device targets power supplies operating from high-voltage dc and three-phase power sources found in industrial, motor-drive, metering and renewable energy applications, and standard mains-voltage applications where continuous operation during line swells and surges is required. The 900V InnoSwitch-EP ICs are highly efficient – typically 85% for a dual output 18W design – eliminating heat sinks and enabling highly compact power supply implementations.

Explains David Chen, director of applications engineering at Power Integrations: “Designers of high-voltage systems often have megaWatts of power at their disposal, from which they may need to draw off a few milliWatts to feed a low-voltage microprocessor system, or a few tens of Watts for inverter gate drivers. The new 900V InnoSwitch-EP devices drastically simplify the design of robust highly reliable power supplies operating from commonly available industrial voltages.”

Launched last year, Power Integrations’ InnoSwitch-EP IC family employs the company’s innovative, safety-rated FluxLink™ magneto-inductive coupling technology and includes synchronous rectification with accurate secondary-side regulation, resulting in highly efficient, reliable power supply circuits that do not need an optocoupler. The new 900V InnoSwitch-EP ICs feature an uprated, integrated 900 V power MOSFET which provides a significant operating margin for 450Vac industrial systems, increasing reliability and operational life. Working continuously with an input voltage of up to 450Vac, an optional layer of protection - line UV/OV – prevents the IC from switching and protects the circuit up to 650Vac. This flexibility is a huge benefit for designers of power supplies that suit all worldwide conditions.

900V InnoSwitch-EP ICs enhance power-supply reliability by reducing BOM count to a minimum level and by eliminating optocouplers which degrade with time. Devices exceed all international energy-efficiency standards such as ENERGY STAR®, California Energy Commission and European Union Code of Conduct (CoC), ErP Directive, and the US Department of Energy standards. Devices are UL1577 and TUV (EN60950) safety-approved and EN61000-4-8 (100 A/m) and EN61000-4-9 (1000 A/m) compliant.

900V InnoSwitch-EP samples are available now. Devices are priced at $0.95 in 10,000-piece quantities. Reference design, DER-531, is available from the Power Integrations website.