Semtronics Micro Systems

Internal MOSFET

SM6312 is an integrated MOSFET with primary -side Fly-back control IC with single-stage active power factor correction function for LED lighting systems. Particularly suitable for 85VAC~275VAC full voltage input range.

The IC achieves high power factor and low THD operation by quasi-resonant switch-mode in zero-current state conduction. This effectively reduces the switching losses of power MOSFET to improve system efficiency, but also improves the EMI characteristics of the system. The line and load regulation of LED current is about ±3% because of this particular control method.

SM6312 integrate 650V power MOSFET, which streamlined the components, saving cost and size of the system, simplifying the design of LED lighting systems. SM6312 integrated line voltage and load compensation function, the system has an excellent line voltage and load regulation.

Key Features

  • Primary-side feedback control
  • Internal 600V MOSFET
  • Quasi resonant switching mode
  • Low input current THD
  • >3% Output Current accuracy
  • Ultra low start up current
  • Excellent line and load regulation
  • OCP, OTP, OVP/li>
  • Low cost BOM
  • SOP 7L Package


  • LED lighting
  • Down light
  • Tubelight
  • PAR lamp
  • Bulb

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