PWM Controllers
  • SC1102
  • Synchronous Voltage-Mode Controller for Distributed Power-Supply Applications
  • SC1103
  • Asynchronous Voltage-Mode PWM Controller for 12 V Input
  • SC1104A
  • Not Recommended For New Designs
  • SC1104B
  • Simple, Synchronous Voltage-Mode PWM Controller
  • SC1109
  • Synchronous PWM Controller With Dual Low-Dropout Regulator Controllers
  • SC1110
  • Sink and Source DC/DC Controller For Termination Power Supply Applications
  • SC1116
  • Linear FET Controller for DDR Supplies
  • SC1175
  • Low-Power Dual Synchronous DC/DC Controller with Current-Sharing Circuitry
Semtech SC4812

Semtech SC4812

Primary Side PoE PWM Controller

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The SC4812 is a highly integrated current mode PWM controller designed for isolated or non-isolated dc-dc converters in telecommunication and data communication applications. It minimizes the amount of external discrete components needed and leads to substantial cost and space saving converter designs.


  • Wide input range
  • High-voltage start-up circuit
  • Current mode control
  • Transconductance error amplifier
  • Leading-edge blanking
  • Cycle by cycle current limit
  • Programmable external soft-start
  • Thermal shutdown
  • SO-8 package. This product is fully WEEE and RoHS compliant


  • IP phones, PoE
  • Telecom isolated converters
  • Off-line isolated power supplies
  • Instrumentation power supplies
  • Battery chargers



Order Codes

  • SC4812STRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
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