TPA0223 Datasheet, PDF (1/6 Pages) Texas Instruments – 2-W MONO AUDIO POWER AMPLIFIER WITH HEADPHONE DRIVE

D Ideal for Notebook Computers, PDAs, and
Other Small Portable Audio Devices
D 2 W Into 4-Ω From 5-V Supply
D 0.6 W Into 4-Ω From 3-V Supply
D Stereo Head Phone Drive
D Separate Inputs for the Mono (BTL) Signal
and Stereo (SE) Left/Right Signals
D Wide Power Supply Compatibility
3 V to 5 V
D Meets PC99 Desktop Specs (Target)
D Low Supply Current
– 11 mA Typical at 5 V
– 10 mA Typical at 3 V
D Shutdown Control . . . 1 µA Typical
D Shutdown Pin is TTL Compatible
D –40°C to 85°C Operating Temperature
Range
D Space-Saving, Thermally-Enhanced MSOP
Packaging
TPA0223
2-W MONO AUDIO POWER AMPLIFIER
WITH HEADPHONE DRIVE
SLOS277A – JANUARY 2000 – REVISED MARCH 2000
DGQ PACKAGE
(TOP VIEW)
MONO–IN
1
SHUTDOWN
2
V_DD
3
BYPASS
4
RIN
5
10
LO/MO
9
LIN
8
GND
7
SR/MN
6
RO/MO
description
The TPA0223 is a 2-W mono bridge-tied-load (BTL) amplifier designed to drive speakers with as low as 4-Ω
impedance. 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 TPA0223 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-kΩ internal feedback resistor
(A_V = – R_F/ R_I). The power stage is internally configured with a gain of –1.25 V/V in SE mode, and –2.5 V/V in
BTL mode. Thus, the overall gain of the amplifier is 62.5 kΩ/ R_I in SE mode and 125 kΩ/ R_I in BTL mode. The
input terminals are high-impedance CMOS inputs, and can be used as summing nodes.
The TPA0223 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.
PowerPAD is a trademark of 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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Copyright © 2000, Texas Instruments Incorporated
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