GENERAL DESCRIPTION

OB6221 is a stereo Class-D audio power amplifier driving 8ohm speakers in a bridge-tied load configuration for up to 13W power outputs at each channel. It achieves up to 87% power efficiency.

Fixed 26dB gain of the amplifier is provided in OB6221.

OB6221 provides excellent EMC performance for filter-free applications.

OB6221 provides comprehensive IC and system level protection features including speaker terminal short circuit protection, IC over temperature protection, power supply over voltage and under voltage protection, etc. The short circuit protection and thermal protection are auto-recoverable.

To protect speaker, direct current (DC) protection is provided in OB6221 as a latched shut-down protection function.

OB6221 is offered in TSSOP20 packages with built-in thermal pad for improved power dissipation.

FEATURES

Up to 13W(10% THD+N) per channel output into 8W load at 15V supply

Up to 10W(10% THD+N) per channel output into 8W load at 13V supply

6V to 20V single power supply operation

95dB SNR (typical, 1kHz frequency sinewave input, THD+N<1%)

Filter-free operation

Low shutdown/standby current

Fixed 26dB gain

External Shut down control function

Differential or Single-ended analog inputs

Thermal and over-current protection with auto recovery

Minimized pop noise without additional external circuitry.

Excellent EMC performance

APPLICATIONS

TVs

Powered Speakers

Boombox

TYPICAL APPLICATION