TPA0152

2-W STEREO AUDIO POWER AMPLIFIER

WITH DIGITAL VOLUME CONTROL

SLOS246B – JUNE 1999 – REVISED MARCH 2000

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POST OFFICE BOX 655303

Into 10-k

Ω Load

Load

External Gain-Setting Resistors

–40 dB

24-Pin TSSOP PowerPAD

™

description

The TPA0152 is a stereo audio power amplifier in a 24-pin TSSOP thermally enhanced package capable of

delivering 2 W of continuous RMS power per channel into 3-

Ω loads. This device minimizes the number of

external components needed, which simplifies the design and frees up board space for other features. When

driving 1 W into 8-

Ω speakers, the TPA0152 has less than 0.3% THD+N across its specified frequency range.

Included within this device is integrated depop circuitry that virtually eliminates transients that cause noise in

the speakers.

The overall gain of the amplifier is controlled digitally by the UP and DOWN terminals. At power up, the gain

is set at the lowest level, –85 dB. It can then be adjusted to any of 31 discrete steps by pulling the voltage down

at the desired pin to logic low. The gain is adjusted in the initial stage of the amplifier as opposed to the power

output stage. As a result, the THD changes very little over all volume levels.

An internal input MUX allows two sets of stereo inputs to the amplifier. In notebook applications, where internal

speakers are driven as BTL and the line outputs (often headphone drive) are required to be SE, the TPA0152

automatically switches into SE mode when the SE/BTL input is activated. This effectively reduces the gain by

6 dB.

The TPA0152 consumes only 10 mA of supply current during normal operation. A miserly shutdown mode is

included that reduces the supply current to less than 150

µA.

The PowerPAD package (PWP) delivers a level of thermal performance that was previously achievable only

in TO-220-type packages. Thermal impedances of approximately 35

°C/W are truly realized in multilayer PCB

applications. This allows the TPA0152 to operate at full power into 8-

Ω loads at ambient temperatures of 85°C.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

Copyright

© 2000, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

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GND

UP

DOWN

LOUT+

LLINEIN

LHPIN

RIN

LOUT–

LIN

BYPASS

GND

GND

RLINEIN

SHUTDOWN

ROUT+

RHPIN

CLK

ROUT–

SE/BTL

PC-BEEP

GND

PWP PACKAGE

(TOP VIEW)

PowerPAD is a trademark of Texas Instruments Incorporated.