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Audio Applications

Power Integrations offers a range of power conversion ICs that can provide reliable, efficient, low cost power solutions for audio power applications. Capable of supporting peak power requirements in excess of three times average power requirements with no increase in transformer size, the PeakSwitch® product family is ideal for supporting applications with large peak loads, such as:

  • Audio amplifiers
  • Computer audio
  • Home theater
  • MP3 music players
  • MP3 audio systems
  • Digital radio applications

The table below describes which family of PI ICs is suited for a typical application.

Where product families overlap, selection of the best device can be facilitated by use of PI Expert™ software, available here.

In order to understand how power supplies are designed to meet audio system specs, designers need to understand the terms "RMS power" and "peak power." Read about audio power requirements and see how PI products meet audio power demands.

Typical Applications

Typical Product Application Application Notes
Design
Ideas		 Design
Example
Reports 		Engineering
Prototype
Reports		 Reference
Design
Kits
75 W, (126 W) PeakMultiple Output Flyback Power Supply
Using Magnetic Amplifiers		 Design Ideas are concise two-page documents describing a design for a specific application.      
80 W (200 W Peak) Multiple Output Power Supply Design Ideas are concise two-page documents describing a design for a specific application.      
70 W (126 W Peak) Audio Amplifier Power Supply Design Ideas are concise two-page documents describing a design for a specific application.      
24 W (36 W Peak) Audio Amplifier Power Supply Design Ideas are concise two-page documents describing a design for a specific application.      
10 W Adapter for
Portable Audio Players With Latching Overvoltage
and Over-Temperature Shutdown Protection		 Design Ideas are concise two-page documents describing a design for a specific application.      
20 W (43 W Peak) Audio Amplifier Power Supply Design Ideas are concise two-page documents describing a design for a specific application.      
5 W High Efficiency Charger for Portable Audio Players Design Ideas are concise two-page documents describing a design for a specific application.      
General Purpose 32 W (81 W Peak) Supply Design Ideas are concise two-page documents describing a design for a specific application.   Engineering Prototype Reports contain a power supply reference design specification, schematic, bill of materials, transformer documentation, and pcb layout. Performance data and typical operating characteristics are included. The design has been put into production for use in our Reference Design Kits. DAK-93
12 W Universal Input CV Adapter Design Ideas are concise two-page documents describing a design for a specific application.   Engineering Prototype Reports contain a power supply reference design specification, schematic, bill of materials, transformer documentation, and pcb layout. Performance data and typical operating characteristics are included. The design has been put into production for use in our Reference Design Kits. RDK-91
Low-Cost 2 W Universal Input CV Adapter Design Ideas are concise two-page documents describing a design for a specific application.   Engineering Prototype Reports contain a power supply reference design specification, schematic, bill of materials, transformer documentation, and pcb layout. Performance data and typical operating characteristics are included. The design has been put into production for use in our Reference Design Kits. DAK-89
16 W Audio Amplifier Power Supply Design Ideas are concise two-page documents describing a design for a specific application.      

Product Families Used in These Applications

IC Product
Family		 Typical Circuit
Configuration		 Power/Current
Ratings*		 Description
LinkSwitch®-XT Buck Up to 6 W
Energy-efficient capacitive drop replacement with minimal external component required
TinySwitch®-III Flyback Up to 28.5 W
Improved design  flexibility. Reduced input capacitance and transformer size due to time extension and I2f ratings.
PeakSwitch Flyback Up to 290 W†
Enhanced, energy-efficient, off-line Switcher IC with super peak power performance
TOPSwitch®-HX Flyback Up to 254 W
Incorporates a 700 V power MOSFET, high voltage switched current source, PWM control, oscillator, thermal shutdown circuit, fault protection and other control circuitry onto a monolithic device
TOPSwitch®-GX Flyback Up to 210 W
Maximum design flexibility and higher power ratings. External programmable current limit. Under-voltage and over-voltage protection.
TinySwitch®-PK Flyback Up to 35 W
Peak surge power capability allows more power for audio applications without increasing component size

  * Universal input, open frame
  † Peak power output

Related Design Support Documents

General Design Information
Design Guides
TOPSwitch® Power Supply Design Techniques for EMI and Safety
LinkSwitch®-TN Design Guide
TOPSwitch-GX AN-32 TOPSwitch-GX Flyback Design Methodology
AN-41
PeakSwitch Design Guide
LinkSwitch-TN AN-43
TOPSwitch-HX Design Guide
PeakSwitch    
Package Information    

Related Links

Power Integrations News:

See Andrew Smith, product marketing manager for the PeakSwitch family, talk about the PKS607 here.
See the version subtitled in Traditional Chinese.
See the version subtitled in Simplified Chinese.

Power Integrations Support:

  • PI Expert™, our interactive design program, takes a user's power supply specifications and automatically determines the critical components (including transformer specifications) needed to generate a working switched mode power supply. It reduces design time from days to minutes.
  • Designers can also use our “Ask an Engineer” feature or consult our reference library, containing more than 200 online reference designs, applications notes, engineering  prototype reports, design ideas, and other documents.
  • Designers can search PI Facts, our search tool that directs them to relevant product and design information based on their application specifications
  • Design of an Audio Power System describes the benefits of using PeakSwitch to design an audio system power supply for up to 85 W peak power.

Contact your local Power Integrations Sales Representative or Distributor for assistance.

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