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Product attributes Property Value
Manufacturer Power Integrations
Product Series TOPSwitch®-JX
Packaging Cut Tape (CT) | Tape & Reel (TR)
Output Isolation Isolated
Internal Switch(s) Yes
Voltage - Breakdown 725V
Topology Flyback
Voltage - Start Up -
Voltage - Supply (Vcc/Vdd) -
Duty Cycle 78%
Frequency - Switching 66kHz, 132kHz
Power (Watts) 73 W
Fault Protection Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit
Control Features Frequency Control
Operating Temperature -40°C ~ 150°C (TJ)
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case 12-BESOP (0.350", 8.89mm Width), 11 Leads, Exposed Pad
Supplier Device Package 12-ESOP
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The Power Integrations TOP268KG-TL is a flyback offline switcher from the TOPSwitch®-JX series with an integrated power switch and 725V breakdown voltage. It delivers up to 73W at 66kHz or 132kHz switching with 78% max duty cycle. Protections include current limiting, over load, over temperature, over voltage, and short circuit. Housed in a 12-BESOP package rated -40°C to 150°C.

  • Integrated switch and 725V breakdown simplify isolated flyback designs.
  • Up to 73W output suits mid-power applications.
  • Dual 66kHz/132kHz frequencies with frequency control aid design flexibility.
  • Comprehensive protections (OL, OT, OV, SC, current limiting) boost reliability.
  • -40°C to 150°C junction range suits harsh environments.

Isolated Flyback Power Supplies

The TOP268KG-TL is a flyback switcher with an integrated switch and 725V breakdown, suited to galvanically isolated offline designs up to 73W.

Mid-Power Adapters and Chargers

Delivering up to 73W, it fits mid-power isolated flyback applications requiring a robust integrated switch.

Frequency-Controlled Designs

Selectable 66kHz and 132kHz switching with frequency control supports optimization of transformer and EMI-related design tradeoffs.

Fault-Tolerant Systems

Current limiting, over load, over temperature, over voltage, and short circuit protections enhance reliability.

Demanding Thermal Environments

A -40°C to 150°C junction range supports use in harsh conditions.

Q: What topology does the TOP268KG-TL use?
A: It is a flyback offline switcher for isolated supplies.
Q: Does it have an integrated switch?
A: Yes, it integrates the power switch.
Q: What is the breakdown voltage?
A: 725V.
Q: How much power can it deliver?
A: Up to 73W.
Q: What switching frequency does it use?
A: 66kHz and 132kHz.
Q: What protections are included?
A: Current limiting, over load, over temperature, over voltage, and short circuit.
Base Product Number : TOP268KG
12-BESOP 132kHz 66kHz 725V 73W AC-DC Offline Switcher Flyback Converter Isolated Power Integrations TOPSwitch-JX
Q: What topology does the TOP268KG-TL use?
A: It is a flyback offline switcher for isolated supplies.
Q: Does it have an integrated switch?
A: Yes, it integrates the power switch.
Q: What is the breakdown voltage?
A: 725V.
Q: How much power can it deliver?
A: Up to 73W.
Q: What switching frequency does it use?
A: 66kHz and 132kHz.
Q: What protections are included?
A: Current limiting, over load, over temperature, over voltage, and short circuit.