Overview
Solutions
HW Evaluation Tools
Resources
Tools and Software
Key Products
Get Started

Many appliances and equipment require the availability of an auxiliary power source (SMPS) that works separately from the main power supply to support, for instance, stand-by operation. Power ratings can vary from a few to a few tens of watts for these auxiliary supplies, which can be either isolated or non-isolated. To ensure good performance, engineers must choose a power topology – including fly-back or quasi-resonant – that best meets the efficiency, size, safety and cost requirements.

ST offers a wide portfolio of highly-integrated offline converters for applications up to 20 W with an extremely low total stand-by consumption – down to less than 4 mW – and breakdown voltages as high as 900 V. In addition to PWM switching controllers, power MOSFETs and diodes, we offer an extensive set of evaluation and development tools as well as reference designs to help engineers develop high-efficiency and compact auxiliary power supply solutions.

Isolated Auxiliary Power Supply 20-75W
Isolated Auxiliary Power Supply 20-75W
In the 20 to 75W power range, the need to meet increasingly tight efficiency and stand-by requirements for auxiliary power supplies has...
Read more
Isolated Auxiliary Power Supply up to 20W
Isolated Auxiliary Power Supply up to 20W
In the power range up to 20W, high-power-density and cost-effective isolated auxiliary power supplies can be designed using single-transistor fly-back...
Read more
Non-Isolated Auxiliary Power Supply up to 20W
Non-Isolated Auxiliary Power Supply up to 20W
In a number of applications the reference of the secondary circuit is connected to the same reference as the primary – the AC mains...
Read more

00 Files selected for download

Publications and Collaterals

    • Description Version Size Action
      Diodes and rectifiers selection guide 2.0
      815.09 KB
      PDF

      Diodes and rectifiers selection guide

    • Description Version Size Action
      VIPerPlus - Your SMPS design deserves a Plus 05.2018
      1.08 MB
      PDF

      VIPerPlus - Your SMPS design deserves a Plus