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Dramatically simplifies low power CV/CC charger designs by eliminating an optocoupler and secondary control circuitry.


Product Details


The LinkSwitch-II dramatically simplifies low power CV/CC charger designs by eliminating an optocoupler and secondary control circuitry. The device introduces a revolutionary control technique to provide very tight output voltage and current regulation, compensating for transformer and internal parameter tolerances along with input voltage variations.

The device incorporates a 700 V power MOSFET, a novel On/Off control state machine, a high voltage switched current source for self biasing, frequency jittering, cycle-by-cycle current limit and hysteretic thermal shutdown circuitry onto a monolithic IC.

Product Highlights

Dramatically Simplifies CV/CC Converters

  • Eliminates Optocoupler and all secondary CV/CC control circuitry
  • Eliminates all control loop compensation circuitry


  • Dramatically simplifies CV converters
  • Enables Clampless designs when an external bias circuit is used

Advanced Performance Features

  • Compensates for transformer inductance tolerances
  • Compensates for input line voltage variations
  • Compensates for cable voltage drop (LNK61X series & LNK632)
  • Compensates for external component temperature variations
  • Very tight IC parameter tolerances using proprietary trimming technology
  • Frequency jittering greatly reduces EMI filter cost
  • Even tighter output tolerances achievable with external resistor selection/trimming

Advanced Protection/Safety Features

  • Auto-restart protection reduces power delivered by >95% for output short circuit and control loop faults (open and shorted components)
  • Hysteretic thermal shutdown – automatic recovery reduces power supply returns from the field
  • Meets HV creepage requirements between Drain and all other pins both on the PCB and at the package

EcoSmart® – Energy Efficient

  • Easily meets all global energy efficiency regulations
  • No-load consumption <200 mW at 230 VAC and down to below 30 mW with optional external bias
  • On/Off control provides constant efficiency down to very light loads – ideal for CEC and ENERGY STAR 2.0 regulations
  • No current sense resistors – maximizes efficiency

Green Package

  • Halogen free and RoHS compliant package


  • Chargers for cell/cordless phones, PDAs, MP3/portable audio devices, adapters
  • LED drivers, etc.


Output Power (Max) - Open Frame, 230V 5.10 W
Breakdown Voltage 700 V
IC Package SO-8C
Mounting Type Surface Mount
Temperature - Operating (Min) -40 °C
Temperature - Operating (Max) 150 °C