TPA0122

2-W STEREO AUDIO POWER AMPLIFIER

WITH FOUR SELECTABLE GAIN SETTINGS

SLOS247B – JUNE 1999 – REVISED MARCH 2000

1

POST OFFICE BOX 655303

Into 10-k

Ω Load

Load

External Gain-Setting Resistors

24-Pin TSSOP PowerPAD

™

description

The TPA0122 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, simplifying the design, and freeing up board space for other features. When

driving 1 W into 8-

Ω speakers, the TPA0122 has less than 0.5% 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.

Amplifier gain is internally configured and controlled by two terminals (GAIN0 and GAIN1). BTL gain settings

of –2, –6, –12, and –24 V/V are provided, while SE gain is always configured as –1 V/V for headphone drive.

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 TPA0122

automatically switches into SE mode when the SE/BTL input is activated, and reduces the gain to –1 V/V.

The TPA0122 consumes only 18 mA of supply current during normal operation. A miserly shutdown mode

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 TPA0122 to operate at full power into 8-

Ω loads at an ambient temperature 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

GAIN0

GAIN1

LOUT+

LLINEIN

LHPIN

RIN

LOUT–

LIN

BYPASS

GND

GND

RLINEIN

SHUTDOWN

ROUT+

RHPIN

PCB ENABLE

ROUT–

SE/BTL

PC-BEEP

GND

PWP PACKAGE

(TOP VIEW)

PowerPAD is a trademark of Texas Instruments Incorporated.