LNK305GN by Power Integrations | Power Switches | Avnet EMEA
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LNK305GN

Power Integrations

Off Line Switcher 7-Pin SMD-B

Manufacturer Part #: LNK305GN

Alternate Part #: LNK305GN


RoHS Compliant

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LinkSwitch-TN is specifically designed to replace all linear and capacitor-fed (cap dropper) non-isolated power supplies in the under 360 mA output current range at equal system cost while offering much higher performance and energy efficiency. LinkSwitch-TN devices integrate 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 start-up and operating power are derived directly from the voltage on the DRAIN pin, eliminating the need for a bias supply and associated circuitry in buck or flyback converters. The fully integrated auto-restart circuit in the LNK304-306 safely limits output power during fault conditions such as short-circuit or open loop, reducing component count and system-level load protection cost. A local supply provided by the IC allows use of a nonsafety graded optocoupler acting as a level shifter to further enhance line and load regulation performance in buck and buck-boost converters, if required.

Key Features

  • MDCM2: 175 mA
  • Cost Effective Linear/Cap Dropper Replacement
  • Lowest cost and component count buck converter solution
  • Fully integrated auto-restart for short-circuit and open loop fault protection – saves external component costs
  • LNK302 uses a simplified controller without auto-restart for very low system cost
  • 66 kHz operation with accurate current limit – allows low cost off-the-shelf 1 mH inductor for up to 120 mA output current
  • Tight tolerances and negligible temperature variation
  • High breakdown voltage of 700 V provides excellent input surge withstand
  • Frequency jittering dramatically reduces EMI (~10 dB)
  • Minimizes EMI filter cost
  • High thermal shutdown temperature (+135 °C minimum) Much Higher Performance Over Discrete Buck and Passive Solutions
  • Supports buck, buck-boost and flyback topologies
  • System level thermal overload, output short-circuit and open control loop protection
  • Excellent line and load regulation even with typical configuration
  • High bandwidth provides fast turn-on with no overshoot
  • Current limit operation rejects line ripple
  • Universal input voltage range (85 VAC to 265 VAC)
  • Built-in current limit and hysteretic thermal protection
  • Higher efficiency than passive solutions
  • Higher power factor than capacitor-fed solutions
  • Entirely manufacturable in SMD EcoSmart™– Extremely Energy Efficient
  • Consumes typically only 50/80 mW in self-powered buck topology at 115/230 VAC input with no-load (opto feedback)
  • Consumes typically only 7/12 mW in flyback topology with external bias at 115/230 VAC input with no-load
  • Meets California Energy Commission (CEC), Energy Star, and EU requirements

Technical Attributes

Description
Value
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Product Dimensions
9.83 x 6.6 x 3.68 mm
Lead Finish
Matte Tin
Mounting
Surface Mount
Max Processing Temp
260
Pin Count
7
Operating Temperature
-40 to 150 °C
Supplier Package
SMD-B

ECCN / UNSPSC

Description
Value
ECCN:
EAR99
SCHEDULE B:
8542390000
HTSN:
8542390001
UNSPSC:
32101600
UNSPSC VERSION:
V15.1101

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