General Description

  The VA2221L is a cost-effective filter-less Class D stereo audio power amplifier that operates in wide range of various power supplies. VA2221L provide volume control with two selectable gain settings (26dB, 36dB). VA2221L 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 perform-ance. With the function of power limit, the speakers .could be operated safely and the input signal would

be also normalized.

  VA2221L operates with high efficiency energy con-version up to 88% (80 Load) so that the external heat sink can be eliminated while playing music.

  VA2221L 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. .The VA2221L is available in small TSSOP-28 green package with exposed pad.

Features

- Operation Voltage from 6V to 26V

- Excellent EMI Performance

- Maximum 88% Efficiency with an 8Q Speaker

- Stereo Mode:

  15W@4Q∩Load at 12V

  20W@8Q Load at 1 8V

- Mono Mode:

  25W@4Q Load at 12V

  30W@4Q Load at 1 8V

- Two Selectable Gain Settings

- 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