General Description

The VA2228 is a cost-effective filter-less Class D stereo audio power amplifier that operates in wide range of various power supplies. VA2228 provides two selectable gain settings (26dB, 36dB). VA2228 can output 1 5W per channel into 80 load with lower supply current and fewer external components for driving bridged-tied stereo speaker directly with excellent EMI performance. With the function of power limit, the speakers could be operated safely and the input signal would be also normalized. 

VA2228 operates with high efficiency energy con-version up to 88% (81 Load) so that the external heat sink can be eliminated while playing music.

VA2228 also integrates Anti-Pop, Output Short & Over-Heat Protection Circuitry to ensure device re-liability. This device also provides the DC detect and protection scheme to prevent the damage of speaker voice coils.

Features

- Operation Voltage from 6V to 26V

- Excellent EMI Performance

- Maximum 88% Efficiency with an 80 Speaker

- Stereo Mode:

  15W@4Ω Load at 12V

  20W@8Ω Load at 18V

- Mono Mode:

  25W@4Ω Load at 12V

  30W@4Ω Load at 1 8V

- Two Selectable Gain Settings

- Mute Control For Eliminating Pop-up Noise

- Scalable Power Limit Function

- Speaker DC Detection and Protection

- Thermal Protection with Auto- Recovery

- Speaker Protection Circuitry

- Short Circuit and Thermal Protection

- RoHS 2.0 compliant TSSOP-28 Green Pack-

  age with Exposed Pad

Applications

- LCD TV

- Multimedia Speakers

- Sound Bar

Typical Application