Description LinkSwitch-XTincorporates a 700 V power MOSFET, oscillator, simple ON/OFF control scheme, a high-voltage switched current source, frequency jittering, cycle-by-cycle current limit and thermal shutdown circuitry onto a monolithic IC. The startup and operating power are derived directly from the DRAIN pin, eliminating the need for a bias winding and associated circuitry.

Product Highlights Optimized for Lowest System Cost
• Proprietary IC trimming and transformer construction techniques enable Clampless™ designs with LNK362 for lower system cost, component count and higher efficiency
• Fully integrated auto-restart for short circuit and open loop protection
• Self-biased supply – saves transformer auxiliary winding and associated bias supply components
• Frequency jittering greatly reduces EMI
• Meets HV creepage requirements between DRAIN and all other pins both on the PCB and at the package
• Lowest component count switcher solution

Features Superior to Linear/RCC • Accurate hysteretic thermal shutdown protection – automatic recovery improves field reliability
• Universal input range allows worldwide operation
• Simple ON/OFF control, no loop compensation needed
• Eliminates bias winding – simpler, lower cost transformer
• Very low component count – higher reliability and single side printed circuit board
• Auto-restart reduces delivered power by 95% during short circuit and open loop fault conditions
• High bandwidth provides fast turn-on with no overshoot and excellent transient load response

Applications • Chargers/adapters for cell/cordless phones, PDAs, digital cameras, MP3/portable audio players, and shavers
• Supplies for appliances, industrial systems, and metering

Manufacturer	Power Integrations
Product Category	AC DC Converters, Offline Switchers
Series	LinkSwitch®-XT
Type	Off Line Switcher
Packaging	Tube
Tradename	LinkSwitch
Package-Case	8-DIP (0.300", 7.62mm), 7 Leads
Operating-Temperature	-40°C ~ 150°C (TJ)
Mounting-Type	Through Hole
Supplier-Device-Package	DIP-8B
Watt	7.5W
Output-Isolation	Isolated
Internal-Switch-s	Yes
Voltage-Breakdown	700V
Topology	Flyback
Voltage-Start-Up	-
Voltage-Supply-Vcc-Vdd	-
Duty-Cycle	60%
Frequency-Switching	132kHz
Fault-Protection	Current Limiting, Open Loop, Over Temperature, Short Circuit
Control-Features	-