Dramatically simplifies low power power supply designs by eliminating an optocoupler and secondary control circuitry.
Typical Application/Performance – Not a Simplified Circuit (a) and Output Characteristic Envelope (b).


The LinkSwitch-CV dramatically simplifies CV power supply design with tight CV requirements and by eliminating an optocoupler and secondary control circuitry. The device introduces a revolutionary control technique to provide very tight output voltage regulation, along with input voltage variations and temperature.

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 Converters

  • Eliminates optocoupler and all secondary CV control circuitry
  • Eliminates bias winding supply – IC is self biasing

Advanced Performance Features

  • 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 delivered power by <95% for output short circuit and all 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


  • Adapters
  • Standby and auxiliary supplies
  • Home appliances, white goods and consumer electronics
  • Industrial controls
Output Power (Watts)

85-265 VAC

Adapter2Open Frame3


  1. Packages: D: SO-8C, P: DIP-8C.
  2. Minimum continuous power in a typical non-ventilated enclosed adapter measured at +50 °C ambient .
  3. Maximum practical continuous power in an open frame design with adequate heatsinking, measured at 50 °C ambient.

Product Documents
Application Notean45.pdf
Package Informationpackageinfo.pdf
Data Sheetlinkcv_family_datasheet.pdf

Reference Designs
RDKs include a working power supply, sample devices, unpopulated pcb, data sheet, comprehensive engineering report, PI Expert design software and other related documentation.
RDK-201LinkSwitch-CV Reference Design Kit
Design Ideas
DI-2016 W universal input adapter
DI-19810 W universal input power supply for DVD player
EcoSmart® - Energy-Efficiency Technology
  • Green RoomEasily meets all global energy efficiency regulations with no added components
  • No-load consumption <200 mW at 230 VAC and down to below 70 mW with optional external bias
  • On/Off control provides constant effi ciency down to very light loads – ideal for mandatory CEC and ENERGY STAR 2.0 regulations
  • No primary or secondary current sense resistors – maximizes efficiency

    Green Package

  • Halogen free and RoHS compliant package