TPA301_07 Datasheet, PDF (1/25 Pages) Texas Instruments – 350-mW MONO AUDIO POWER AMPLIFIER

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TPA301
SLOS208E – JANUARY 1998 – REVISED JUNE 2004
350-mW MONO AUDIO POWER AMPLIFIER
FEATURES
• Fully Specified for 3.3-V and 5-V Operation
• Wide Power Supply Compatibility 2.5 V - 5.5 V
• Output Power for R_L = 8 Ω
– 350 mW at V_DD = 5 V, BTL
– 250 mW at V_DD = 3.3 V, BTL
• Ultra-Low Quiescent Current in Shutdown
Mode . . . 0.15 µA
• Thermal and Short-Circuit Protection
• Surface-Mount Packaging
– SOIC
– PowerPAD™ MSOP
D OR DGN PACKAGE
(TOP VIEW)
SHUTDOWN 1
8
V_O-
BYPASS 2
7
GND
IN+ 3
6
V_DD
IN-
4
5
V_O+
DESCRIPTION
The TPA301 is a bridge-tied load (BTL) audio power amplifier developed especially for low-voltage applications
where internal speakers are required. Operating with a 3.3-V supply, the TPA301 can deliver 250-mW of
continuous power into a BTL 8-Ω load at less than 1% THD+N throughout voice band frequencies. Although this
device is characterized out to 20 kHz, its operation was optimized for narrower band applications such as cellular
communications. The BTL configuration eliminates the need for external coupling capacitors on the output in
most applications, which is particularly important for small battery-powered equipment. This device features a
shutdown mode for power-sensitive applications with a quiescent current of 0.15 µA during shutdown. The
TPA301 is available in an 8-pin SOIC surface-mount package and the surface-mount PowerPAD MSOP, which
reduces board space by 50% and height by 40%.
Audio
Input
R_F
R_I
C_I
C_B
0.1 µF
From System Control
4 ^{IN -}
3 IN+
2 BYPASS
V_DD/2
-
+
-
+
1 SHUTDOWN
Bias
Control
V_DD 6
V_O+ 5
V_DD
C_S
1 µF
V_O- 8
7
GND
350 mW
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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © –2004, Texas Instruments Incorporated