FEATURES

· Compatible With PC 99 Desktop Line-Out Into

10-kW Load

· Compatible With PC 99 Portable Into 8-W Load

· Internal Gain Control, Which Eliminates

External Gain-Setting Resistors

· DC Volume and Gain Control Adjustable From

34 dB to -86 dB

· Bass Boost

· Buffered Docking Station Outputs

· 2.7-W/Ch Output Power Into 3-W Load

· PC-Beep Input

· Depop Circuitry

· Stereo Input MUX

· Fully Differential Input

· Low Supply Current and Shutdown Current

· Surface-Mount Power Packaging 28-Pin

TSSOP PowerPAD™

DESCRIPTION

The TPA6010A4 is a stereo audio power amplifier in a 28-pin TSSOP thermally enhanced package capable of

delivering 2.7 W of continuous RMS output power into 3-W loads. When driving 1 W into 8-W speakers, the

TPA6010A4 has less than 0.22% THD+N across its specified frequency range.

The TPA6010A4 has several features optimized for notebook PCs including bass boost, docking station outputs,

dc volume control, and dc gain control.

The TPA6010A4 has a buffer and volume control gain stage that are set by dc voltages. The buffer has a

differential input and a differential output. The gain of the buffer, which is controlled by the dc voltage on the

BUFFGAIN terminal, is adjustable from -46 dB to 14 dB. The docking station output is 6 dB lower than the buffer

gain because the buffer has a differential output and the docking station output is taken from just one of the

buffer outputs. The volume control amplifier is adjustable from -34 dB to 20 dB in BTL mode and is 6 dB lower in

SE mode. The volume control stage is adjustable by dc voltage on the VOLUME terminal. The amplifier gain

from input-to-speaker is the sum of the volume control and the buffer gain. The input-to-speaker gain is

adjustable from -86 dB to 34 dB in BTL mode and -92 dB to 28 dB in the SE mode.

The bass boost of the amplifier sums the right and left inputs, adds gain, filters out the high frequencies, and

then adds the bass boost signal back into the output power amplifier. The frequency of the bass boost is

adjusted by adding an RC filter from BBOUT to BBIN. The gain of the bass boost is set to 12 dB if the same

bass is present in both the right and left channels. If the bass is present in just one of the channels, the gain of

the bass is set to 9.5 dB. The gain can be reduced by adding a voltage divider from BBIN to BBOUT. If not using

the bass boost, pull the BBENABLE pin low.