DN91, Synchronous Rectification Improves Set Top-Box Power Supply Efficiency

Reference Design using part ZTL431 by Diodes Incorporated

Enlarge
Image 1 / 1

Manufacturer

Diodes Incorporated
  • Application Category
    Power Supplies
  • Product Type
    AC to DC Multi-Output Power Supplies

Associated Documents

For End Products

  • Set-Top Box

Description

  • Typical set top box power supply. It is a cost effective design with minimum component count. The circuit is designed to operate in Discontinuous Conduction Mode because there are lower switching losses. Furthermore, the flyback transformer size can be reduced owing to the lower average energy storage whilst its smaller magnetizing inductance also yields a better transient line/load response

Key Features

  • Conversion Type
    AC to DC
  • Input Voltage
    230 (AC) V
  • Output Voltage
    -20|3.3|5|12 V
  • Output Current
    0.06@-20V|0.5@12V|2@3.3V|2.5@5V A
  • Output Power
    27 W
  • Efficiency
    78.2 %
  • Topology
    Flyback

Featured Parts (3)

Featured Parts
Part Number Manufacturer Type Description
ZTL431BQE5TA Diodes Incorporated Voltage References V-Ref Adjustable 2.5V to 20V 100mA Automotive AEC-Q100 5-Pin SOT-25 T/R Buy
ZTL431BQFTA Diodes Incorporated Voltage References V-Ref Adjustable 2.5V to 20V 100mA Automotive AEC-Q100 3-Pin SOT-23 T/R Buy
ZTL431AQFTA Diodes Incorporated Voltage References V-Ref Adjustable 2.5V to 20V 100mA Automotive AEC-Q100 3-Pin SOT-23 T/R Buy

Research and Events

The PAM8823 Digital Audio Amplifier by Diodes Incorporated

Learn how the PAM8823 Digital Audio Amplifier offers an efficient and high-quality solutions for a variety of applications.

4 years ago

The DMN3012LEG MOSFET from Diodes Incorporated

Explore the features and benefits of the DMN3012LEG MOSFET from Diodes Incorporated.

4 years ago

Introduction to 2-wire automotive hall effect sensors

In this video from Diodes Incorporated, get an overview of automotive hall effect sensors, including tech introductions and demonstrations.

2 years ago
Sorry, your filter selection returned no results.

Connect with Electronic Components

Facebook LinkedIn Instagram YouTube
Contact Us

Contact and Support

Programs and Partners

Product Categories

Manufacturers

Verticals & Trends

We've updated our privacy policy. Please take a moment to review these changes. By clicking I Agree to Arrow Electronics Terms Of Use  and have read and understand the Privacy Policy and Cookie Policy.

See Short Policy

Our website places cookies on your device to improve your experience and to improve our site. Read more about the cookies we use and how to disable them here. Cookies and tracking technologies may be used for marketing purposes.
By clicking “Accept”, you are consenting to placement of cookies on your device and to our use of tracking technologies. Click “Read More” below for more information and instructions on how to disable cookies and tracking technologies. While acceptance of cookies and tracking technologies is voluntary, disabling them may result in the website not working properly, and certain advertisements may be less relevant to you.
We respect your privacy. Read our privacy policy here