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 SC4905B

Semtech SC4905B

High-Performance Voltage-Mode PWM Controller

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The SC4905A/B is a 10 pin BICMOS primary side voltage mode controller for use in Isolated DC-DC and off-line switching power supplies.

Features


  • Operation to 1 MHz
  • Accurate programmable maximum duty cycle
  • Integrated oscillator/voltage feed forward compensation
  • Line voltage monitoring
  • External frequency synchronization
  • Bi-phase mode of operation for ripple reduction
  • Under 100 µA start-up current
  • Accessible reference voltage
  • VDD under-voltage lockout
  • -40°C to +105°C operating temperature
  • 10-lead MSOP package

Applications


  • Telecom equipment and power supplies
  • Networking power supplies
  • Power over LAN applications
  • Industrial power supplies
  • Isolated power supplies

Packaging

MSOP-10

Order Codes

  • SC4905BIMSTR: Package Minimum Tape & Reel Only
  • SC4905BIMSTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only
 
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