PWM Controllers
  • SC508A
    • EcoSpeed® DC-DC Buck Controller with Integrated LDO
  • SC508
    • EcoSpeed® DC-DC Buck Controller with Integrated LDO
  • SC493
    • EcoSpeed® Step-down Controller with I2C Interface
  • SC419
    • Single Phase DC-DC Converter with Integrated Boost Diode
  • SC418
    • EcoSpeed® DC-DC Buck Controller with Programmable LDO
  • SC4911
    • Bias/Primary Side PWM Controller with Ultra-Low Start-up Current
  • SC4910B
    • High-Performance Secondary Side Controller with Synchronous Rectifier
  • SC4910A
    • High-Performance Secondary Side Controller with Synchronous Rectifier
Semtech SC4905A

Semtech SC4905A

High-Performance Voltage-Mode PWM Controller

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

  • SC4905AIMSTR: Package Minimum Tape & Reel Only
  • SC4905AIMSTRT: Lead-Free, RoHS and WEEE Compliant, Package Minimum Tape & Reel Only