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Product attributes Property Value
Manufacturer Power Integrations
Product Series TOPSwitch®-HX
Packaging Cut Tape (CT) | Tape & Reel (TR)
Output Isolation Isolated
Internal Switch(s) Yes
Voltage - Breakdown 700V
Topology Flyback
Voltage - Start Up -
Voltage - Supply (Vcc/Vdd) -
Duty Cycle 78%
Frequency - Switching 66kHz
Power (Watts) 28 W
Fault Protection Current Limiting, Over Temperature, Over Voltage
Control Features -
Operating Temperature -40°C ~ 150°C (TJ)
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case 8-SMD (7 Leads), Gull Wing
Supplier Device Package SMD-8C
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The TOP254GN-TL from Power Integrations is a flyback offline switcher in the TOPSwitch®-HX series, delivering up to 28 W with a 700V integrated switch. It provides galvanically isolated output, 66kHz switching, and 78% maximum duty cycle in an 8-SMD gull-wing package. Current limiting, over temperature, and over voltage protection ensure reliable operation across -40°C to 150°C junction temperatures.

  • Integrated 700V switch simplifies isolated flyback design and reduces component count.
  • 28 W output at 66kHz supports compact, efficient power supplies.
  • 78% max duty cycle enables flexible transformer design.
  • Fault protection (current limiting, OTP, OVP) improves reliability.
  • Wide -40°C to 150°C junction temperature range for demanding environments.

Compact Isolated Adapters

The integrated 700V switch and 28 W capability make the TOP254GN-TL well suited for compact isolated flyback adapters and chargers.

Appliance Bias Supplies

With 78% duty cycle and 66kHz switching, this device supports efficient isolated bias and auxiliary supplies in appliances.

Industrial Auxiliary Power

Operating from -40°C to 150°C junction temperature, it handles demanding thermal conditions in isolated control supplies.

Consumer Electronics

The TOPSwitch®-HX series design with integrated switch simplifies isolated flyback power for set-top boxes and small electronics.

Q: What topology does the TOP254GN-TL use?
A: It is a flyback offline switcher with galvanically isolated output, part of the TOPSwitch®-HX series.
Q: Does it have an integrated switch?
A: Yes, the power MOSFET is integrated on-chip.
Q: What is the breakdown voltage?
A: 700V Vds rating for universal offline input.
Q: What power does it deliver?
A: Up to 28 W at 66kHz switching frequency with 78% max duty cycle.
Q: What protections are included?
A: Current limiting, over temperature, and over voltage protection.
Base Product Number : TOP254GN
28W 66kHz 700V 8-SMD AC-DC Flyback Converter Isolated Offline Switcher Power Integrations TOPSwitch-HX
Q: What topology does the TOP254GN-TL use?
A: It is a flyback offline switcher with galvanically isolated output, part of the TOPSwitch®-HX series.
Q: Does it have an integrated switch?
A: Yes, the power MOSFET is integrated on-chip.
Q: What is the breakdown voltage?
A: 700V Vds rating for universal offline input.
Q: What power does it deliver?
A: Up to 28 W at 66kHz switching frequency with 78% max duty cycle.
Q: What protections are included?
A: Current limiting, over temperature, and over voltage protection.