TIDA-00434, Simple and Robust Bias Power Supply with Low Standby for Home Appliances

Reference Design using part UCC28722DBV by Texas Instruments

Manufacturer

Texas Instruments
  • Application Category
    Power Supplies
  • Product Type
    AC to DC Multi-Output Power Supplies

Description

  • TIDA-00434, Simple and Robust Bias Power Supply with Low Standby for Home Appliances. This reference design is a multiple output (12V, 3.3V/5V), 2.4W bias power supply for home appliances using a low cost Quasi-resonant PWM controller. The design supports conversion of wide range DC input ranging from 90V DC to 425V DC or AC input ranging from 85V AC to 300V AC to standard power rails of 12V and 3.3V/5V. TIDA-00434 is able to achieve reduced switching losses, using a buck power stage operating in discontinuous mode with valley switching. The design offers high efficiency (>70%) and low stand-by power of <100mW when system is in idle mode. The design uses low cost external 800V BJT as a switch providing higher operating voltage margin

Key Features

  • Conversion Type
    AC to DC
  • Input Voltage
    85 to 300 (AC) V
  • Output Voltage
    3.3|5|12 V
  • Output Power
    2.4 W
  • Efficiency
    70 %
  • Topology
    Buck

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