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INN2105K - InnoSwitch™-CE Offline Switcher IC

The INN2105K is a high-efficiency offline switcher IC from Power Integrations' InnoSwitch-CE family, designed for isolated flyback power supplies up to 20W. Featuring integrated 650V power MOSFET and secondary-side synchronous rectification (SR), this IC delivers superior efficiency and reliability for AC-DC conversion applications.

Key Features

  • 650V breakdown voltage for universal input (85-265 VAC)
  • 20W maximum output power in compact flyback topology
  • Secondary-side SR for enhanced efficiency and reduced heat
  • 100kHz switching frequency enables smaller magnetics
  • Integrated protection: over-temperature and over-voltage
  • -40°C to 105°C operating range for industrial applications
  • eSOP-R16B surface-mount package for automated assembly

Applications

Ideal for consumer electronics, industrial controls, smart home devices, LED lighting drivers, and auxiliary power supplies requiring compact, efficient, and reliable AC-DC conversion with full isolation.

Design Resources

Full reference designs, application notes, and PI Expert™ design software available from Power Integrations to accelerate your development cycle and ensure optimal performance.

Complete Specifications

Product attributes Property Value
Manufacturer Power Integrations
Product Series InnoSwitch™-CE
Packaging |
Output Isolation Isolated
Internal Switch(s) Yes
Voltage - Breakdown 650V
Topology Flyback, Secondary Side SR
Voltage - Start Up -
Voltage - Supply (Vcc/Vdd) -
Duty Cycle 60%
Frequency - Switching 100kHz
Power (Watts) 20 W
Fault Protection Over Temperature, Over Voltage
Control Features -
Operating Temperature -40°C ~ 105°C (TA)
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case 16-PowerSOIC (0.350", 8.89mm Width), 15 Leads
Supplier Device Package eSOP-R16B