46
Portable Audio
3.1/1.7-W Mono Class-AB Audio Amplifiers
TPA6211A1, TPA6204A1
Get samples, datasheets, evaluation modules and app reports at:
www.ti.com/sc/device/TPA6211A1
or
www.ti.com/sc/device/TPA6204A1
1.5-W Mono Class-AB Audio Amplifier
TPA6203A1
Get samples, datasheets, evaluation modules and app reports at:
www.ti.com/sc/device/TPA6203A1
The TPA6203A1 is a high-performance, fully differential, entry-level
Class-AB audio amplifier that uses four external resistors for gain set-
tings and additional filtering (if needed). The excellent PSRR is ideal
for wireless applications or environments with noisy supplies.
Key Features
• 630 mW into 8
from 3.6 V
• Low supply current: 1.7 mA
• Fully differential architecture
• High PSRR: 85 dB
• High CMRR: 70 dB
• Packaging: 2 x 2 mm BGA (Pb and Pb-Free options)
3 x 3 mm 8-pin QFN
Applications
• Wireless handsets
• Smart/feature phones
• PDAs
The TPA6211A1/TPA6204A1 are high-power, high-performance, fully
differential Class-AB audio amplifiers that integrate two feedback
resistors for lower component count. The excellent PSRR is ideal for
wireless applications or environments with noisy supplies.
The TPA6204A1 has been optimized to drive an 8-Ω speaker load. The
TPA6211A1 was designed to drive down to a 3-Ω load and therefore
drive more output power from the same supply voltage.
Key Features
• 1.22 W into 3
from 3.6 V (TPA6211A1)
• 720 mW into 8
from 3.6 V (TPA6204A1)
• Low supply current: 4 mA
• Fully differential architecture
• High PSRR: 85 dB
• High CMRR: 63 dB
• Packaging: 3 x 3 mm 8-pin QFN
8-pin MSOP (TPA6211A1 only)
Applications
• Wireless handsets
• Smart/feature phones
• PDAs
R
F
In From
DAC
R
I
IN–
IN+
V
DD
Cs
+
GND
V
O
+
V
O
To Battery
+ R
I
RF
V
DD
40 kΩ
To Battery
C
S
SHUTDOWN
Bias
Circuitry
– R
I
In From
DAC
+ R
I
IN-
IN+
40 kΩ
+
V
O+
V
O–
GND
*
C(
BYPASS)
* C
(BYPASS)
is optional
TPA6203A1 block diagram.
SHUTDOWN
Bias
Circuitry
100 kΩ
C
(BYPASS)
*
* C
(BYPASS)
is optional
TPA6211A1/TPA6204A1 block diagram.
Audio Solutions Guide
Texas Instruments 1Q 2006
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