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Product attributes Property Value
Manufacturer Power Integrations
Product Series TOPSwitch®-II
Packaging |
Output Isolation Isolated
Internal Switch(s) Yes
Voltage - Breakdown 700V
Topology Boost, Buck, Flyback, Forward
Voltage - Start Up -
Voltage - Supply (Vcc/Vdd) -
Duty Cycle 67%
Frequency - Switching 100kHz
Power (Watts) 9 W
Fault Protection Current Limiting, Over Temperature
Control Features -
Operating Temperature -40°C ~ 150°C (TJ)
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case 8-SMD, Gull Wing
Supplier Device Package 8-SMD

TOP221G-TL - TOPSwitch-II Offline Switching IC

The TOP221G-TL from Power Integrations is a high-performance offline switcher IC from the renowned TOPSwitch-II family, designed for reliable AC-DC power conversion in space-constrained applications. This integrated solution combines a 700V power MOSFET, PWM control, fault protection, and other control circuitry in a compact 8-SMD surface mount package.

Key Features & Benefits

  • Integrated Design: Internal high-voltage switching MOSFET eliminates external components
  • Multi-Topology Support: Compatible with flyback, forward, buck, and boost converter designs
  • Robust Protection: Built-in current limiting and over-temperature protection ensure safe operation
  • Compact Footprint: 8-SMD gull wing package ideal for high-density PCB layouts
  • Wide Operating Range: Functions reliably from -40°C to 150°C junction temperature
  • Energy Efficient: 100kHz switching frequency with 67% duty cycle for optimized performance

Typical Applications

  • AC-DC power supplies for consumer electronics
  • Industrial control and automation equipment
  • Telecommunications infrastructure
  • LED lighting drivers
  • Standby and auxiliary power supplies

Backed by Power Integrations' reputation for quality and reliability, the TOP221G-TL delivers consistent performance for demanding power conversion applications.

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