TPA0243

2-W MONO AUDIO POWER AMPLIFIER

WITH HEADPHONE DRIVE

SLOS279A – JANUARY 2000 – REVISED MARCH 2000

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POST OFFICE BOX 655303

Other Small Portable Audio Devices

Left and Right Signals

3 V to 5 V

– 10 mA Typical at 5 V

– 9 mA Typical at 3 V

Range

Packaging

description

The TPA0243 is a 2-W mono bridge-tied-load (BTL) amplifier designed to drive speakers with as low as 4-

Ω

impedance. The mono signal is created by summing left and right inputs. The amplifier can be reconfigured

on-the-fly to drive two stereo single-ended (SE) signals into head phones. This makes the device ideal for use

in small notebook computers, PDAs, digital personal audio players, anyplace a mono speaker and stereo head

phones are required. From a 5-V supply, the TPA0243 can delivery 2-W of power into a 4-

Ω speaker.

The gain of the input stage is set by the user-selected input resistor and a 50-k

Ω internal feedback resistor

BTL mode. Thus, the overall gain of the amplifier is 62.5 k

input terminals are high-impedance CMOS inputs, and can be used as summing nodes.

The TPA0243 is available in the 10-pin thermally-enhanced MSOP package (DGQ) and operates over an

ambient temperature range of –40

°C to 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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FILT_CAP

SHUTDOWN

BYPASS

RIN

LO/MO

LIN

GND

SR/MN

RO/MO

DGQ PACKAGE

(TOP VIEW)

PowerPAD is a trademark of Texas Instruments Incorporated.