PMP21513 Reference Design

Texas Instruments

25/50 Watt flyback reference design for audio applications

Description

The quasi-resonant flyback design is a dual output converter with a 24 Volt output and a 6 Volt output. The voltages that are supplied are important for supplying power in audio applications. The design is very low noise for sensitive audio signals with less than 2.5 % voltage ripple on the 24 V output.

Features
  • 90 VAC - 264 VAC input to 24 V/2.2 A isolated outputSecondary output of 6 V/200 mA put through an LDO to output 3.3 V/200 mA to reduce noiseUp to 88.8% Efficiency at full load without the need for a synchronous rectifierStacked windings to improve regulation of 6 V line
Applications
  • Soundbar
  • Smart speaker
Product Categories
  • Power management