Texas Instruments TPA0243DGQ, TPA0243DGQR Datasheet
TPA0243
2-W MONO AUDIO POWER AMPLIFIER
WITH HEADPHONE DRIVE
SLOS279A – JANUARY 2000 – REVISED MARCH 2000
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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
Mono (BTL) Signal Created by Summing
Left and Right Signals
D
Wide Power Supply Compatibility
3 V to 5 V
D
Meets PC99 Desktop Specs (target)
D
Low Supply Current
– 10 mA Typical at 5 V
– 9 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
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-kΩ internal feedback resistor
(AV = – RF/ RI). 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/ RI in BTL mode. The
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.
1
2
3
4
5
10
9
8
7
6
FILT_CAP
SHUTDOWN
V
DD
BYPASS
RIN
LO/MO
LIN
GND
SR/MN
RO/MO
DGQ PACKAGE
(TOP VIEW)
PowerPAD is a trademark of Texas Instruments Incorporated.
TPA0243
2-W MONO AUDIO POWER AMPLIFIER
WITH HEADPHONE DRIVE
SLOS279A – JANUARY 2000 – REVISED MARCH 2000
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
4
FILT CAP
+
–
1.25*R
R
+
–
50 kΩ
M
U
X
5
R
I
C
I
Right
Audio
Input
RO/MO+
6
+
–
1.25*R
R
+
–
50 kΩ
M
U
X
LIN
9
R
I
C
I
10
50 kΩ
Left
Audio
Input
Stereo/Mono
Control
Shutdown
and Depop
Circuitry
SHUTDOWN
2
From
System Control
ST/MN
7
LO/MO–
C
C
C
C
100 kΩ
100 kΩ
V
DD
1 kΩ
C
B
BYPASS
8
BYPASS
BYPASS
BYPASS
BYPASS
BYPASS
V
DD
3
V
DD
GND
RIN
1
AVAILABLE OPTIONS
PACKAGED DEVICES
T
A
MSOP
†
(DGQ)
MSOP
SYMBOLIZATION
–40°C to 85°C TPA0243DGQ AEK
†
The DGQ package are available taped and reeled. To order a taped and reeled part, add the
suffix R to the part number (e.g., TP A0243DGQR).
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