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Power Integrations

 

Power Integrations InnoSwitch3-EP Flyback Switcher IC Family

Offering a wide range of voltage options

The versatile InnoSwitch3-EP flyback switcher IC family by Power Integrations offers a wide range of voltage rating options, making design easy by allowing engineers to select the best switching technology for their application. Members of the family featuring 900 V gallium-nitride (GaN) technology are now available to order. They deliver up to 100 W with better than 93% efficiency and eliminating the need for heatsinks in space-challenged applications.

Power Integrations’ proprietary PowiGaN technology provides the reliability and ruggedness required to realize the 900 V rating. Simultaneously increasing power and efficiency, it makes InnoSwitch3-EP ICs ideal for applications such as appliances, three-phase motors and auxiliary power supplies in servers. The 900 V breakdown voltage of the primary MOSFET also means widened safety margin for regions with high or unstable line voltages, and they are pin-for-pin compatible with 725 V and 750 V InnoSwitch3-EP parts, allowing engineers to benefit from the high-performance switching technology without changing the design.

All InnoSwitch3-EP devices feature synchronous rectification control and a valley-switching discontinuous conduction mode (DCM) and continuous conduction mode (CCM) flyback controller. FluxLink communication technology enables the IC package to bridge the isolation barrier, eliminating the need for optocouplers.

Key Features

  • Up to 93% full-load efficiency
  • Compact package reduces PCB area
  • Excellent multi-output cross regulation with weighted secondary side regulation (SSR) feedback and synchronous FETs
  • Integrated FluxLink™ feedback link, HIPOT-tested to ensure good isolation
  • Exceptional CV/CC accuracy, independent of external components
  • Adjustable accurate output current sense using external resistor
  • Auto-restart fault response for output OVP

Applications

  • Utility meter and smart grid power supplies
  • Industrial power supplies
  • Auxiliary, standby and bias power supplies
  • Energy storage

 

Schematic

Power Integrations InnoSwitch3-EP Schematic