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Product attributes Property Value
Manufacturer Power Integrations
Product Series LinkSwitch™-HP
Packaging Tube |
Output Isolation Isolated
Internal Switch(s) Yes
Voltage - Breakdown 725V
Topology Flyback
Voltage - Start Up -
Voltage - Supply (Vcc/Vdd) -
Duty Cycle 64%
Frequency - Switching 120kHz ~ 136kHz
Power (Watts) 135 W
Fault Protection Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit
Control Features -
Operating Temperature -40°C ~ 150°C (TJ)
Grade -
Qualification -
Mounting Type Through Hole
Package / Case 7-SSIP, 6 Leads, Exposed Pad, Formed Leads
Supplier Device Package eSIP-7C
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The Power Integrations LNK6778E is a Flyback offline switcher from the LinkSwitch™-HP series featuring an integrated switch and 725V breakdown voltage. It delivers up to 135 W with a 120kHz to 136kHz switching frequency and 64% maximum duty cycle, housed in a 7-SSIP package with exposed pad. Comprehensive fault protection includes current limiting, over load, over temperature, over voltage, and short circuit.

  • High power capability up to 135 W in a compact 7-SSIP package for space-constrained designs.
  • 725V breakdown rating provides margin for high-voltage offline operation.
  • Integrated switch reduces external component count and simplifies Flyback design.
  • Broad fault protection suite (current limiting, over load, over temperature, over voltage, short circuit) enhances reliability.
  • -40°C to 150°C junction temperature range supports demanding thermal environments.

High-Power Adapters and Chargers

The LNK6778E delivers up to 135 W in a Flyback topology with a 725V breakdown rating, making it suited to robust offline power supplies that must withstand high voltage stress.

Industrial Power Supplies

With a -40°C to 150°C junction temperature range and comprehensive fault protection including over temperature and short circuit, this device supports demanding industrial environments.

Consumer Electronics Power

The integrated switch and 64% maximum duty cycle simplify design of isolated Flyback converters for set-top boxes, audio equipment, and appliances.

Standby and Auxiliary Rails

Current limiting and over load protection help maintain safe operation across auxiliary supply designs requiring isolated output.

Q: What topology does the LNK6778E use?
A: It is a Flyback offline switcher with galvanically isolated output and an integrated switch.
Q: What is the breakdown voltage?
A: The Vds breakdown rating is 725V.
Q: How much power can it deliver?
A: Up to 135 W.
Q: What switching frequency does it operate at?
A: 120kHz to 136kHz with a 64% maximum duty cycle.
Q: What protections are included?
A: Current limiting, over load, over temperature, over voltage, and short circuit protection.
Base Product Number : LNK6778E
135 W 7-SSIP 725V AC-DC Flyback Converter Isolated LinkSwitch-HP Offline Switcher Power Integrations
Q: What topology does the LNK6778E use?
A: It is a Flyback offline switcher with galvanically isolated output and an integrated switch.
Q: What is the breakdown voltage?
A: The Vds breakdown rating is 725V.
Q: How much power can it deliver?
A: Up to 135 W.
Q: What switching frequency does it operate at?
A: 120kHz to 136kHz with a 64% maximum duty cycle.
Q: What protections are included?
A: Current limiting, over load, over temperature, over voltage, and short circuit protection.