48
Portable Audio
2.1-W Stereo Class-D Audio Amplifier
TPA2012D2
Get samples, datasheets, evaluation modules and app reports at:
www.ti.com/sc/device/TPA2012D2
2.1-W Mono Class-D Audio Amplifiers
with Fixed Gain
TPA2032D1, TPA2033D1, TPA2034D1
Get samples, datasheets, evaluation modules and app reports at:
www.ti.com/sc/device/PARTnumber
(Replace
PARTnumber
with
TPA2032D1, TPA2033D1
or
TPA2034D1)
The TPA203xD1 series are fixed-gain, mono Class-D audio power
amplifiers that will drive 800 mW into a 4-Ω speaker at 3.6 V with
only three external components. Having all the resistors integrated
allows for the smallest solution size possible.
Key Features
• Efficient Class-D operation (88% at 400 mW)
• 590-mW mono into 8
from 3.6 V
• Low supply current: 3 mA
• Fully differential architecture
• High PSRR: 75 dB
• High CMRR: 69 dB
• Packaging: 1.45 x 1.45 mm WCSP (Pb-Free only)
Applications
• Wireless handsets
• Smart/feature phones
• PDAs
Gain Options
Device
TPA2032D1
TPA2033D1
TPA2034D1
Gain
(V/V)
2
3
4
(dB)
6
9.5
12
The TPA2012D2 high-performance, fully differential, stereo Class-D
audio power amplifier can drive down to a 4-Ω speaker load. The gain
select pins and the tiny WCSP package option make the total solution
very small. Due to the high efficiency of Class-D, the device is ideal for
battery-operated audio devices.
Key Features
• Efficient Class-D operation (84% at 400 mW)
• 800 mW into 4
from 3.6 V (per channel)
• Low supply current: 2.5 mA (per channel)
• Fully differential architecture
• High PSRR: 75 dB
• High CMRR: 68 dB
• Packaging: 2 x 2 mm WCSP Pb-Free (Pb-Free only)
4 x 4 mm 20-pin QFN (Pb-Free only)
Applications
• Wireless handsets
• Smart/feature phones
• PDAs
Digital Gain Control
G1
0
0
1
1
G0
0
1
0
1
Gain
(V/V)
2
4
8
16
(dB)
6
12
18
24
To Battery
CS
INR+
Right
Input
INR–
Gain
Adjust
PWM
H-
Bridge
OUTR–
OUTR+
VDD
To Battery
Internal
Oscillator
+
Differential
Input
R
I
IN–
R
I
+
IN+
GND
SHUTDOWN
V
DD
C
S
V
O+
PWM
H-
Bridge
V
O–
Internal
Oscillator
GND
Bias
Circuitry
INL+
Left
Input
INL–
G0
Gain
Adjust
PWM
H-
Bridge
OUTL+
OUTL–
TPA203xD1 block diagram.
G1
SDR
300 kΩ
SDL
300 kΩ
Bias
Circuitry
TPA2012D2 block diagram.
Audio Solutions Guide
Texas Instruments 1Q 2006
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