Datasheet
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FEATURES
1
2
3
4
8
7
6
5
BYPASS
GND
SHUTDOWN
IN2–
IN1–
V
O
1
V
DD
V
O
2
DGK PACKAGE
(TOP VIEW)
1
2
3
4
8
7
6
5
BYPASS
GND
SHUTDOWN
IN2–
IN1–
V
O
1
V
DD
V
O
2
D PACKAGE
(TOP VIEW)
DESCRIPTION
TYPICAL APPLICATION CIRCUIT
Audio
Input
Bias
Control
6
7
5
2
V
O
1
V
O
2
V
DD
3
8
1
4
IN1−
BYPASS
SHUTDOWN
V
DD
/4
C
I
R
I
R
F
C
B
C
S
Audio
Input
C
I
R
I
IN2−
R
F
V
DD
From Shutdown
Control Circuit
−
+
−
+
C
C
C
C
R
R
TPA6100A2D
SLOS269B – JUNE 2000 – REVISED SEPTEMBER 2004
50-mW ULTRALOW VOLTAGE STEREO HEADPHONE AUDIO POWER AMPLIFIER
• 50-mW Stereo Output
• Low Supply Current . . . 0.75 mA
• Low Shutdown Current . . . 50 nA
• Pin Compatible With LM4881 and TPA102
(1)
• Pop Reduction Circuitry
• Internal Midrail Generation
• Thermal and Short-Circuit Protection
• Surface-Mount Packaging
– MSOP and SOIC
• 1.6-V to 3.6-V Supply Voltage Range
(1) The polarity of the SHUTDOWN pin is reversed.
The TPA6100A2D is a stereo audio power amplifier packaged in either an 8-pin SOIC package or an 8-pin
MSOP package capable of delivering 50 mW of continuous RMS power per channel into 16- Ω loads. Amplifier
gain is externally configured by a means of three resistors per input channel and does not require external
compensation for settings of 1 to 10.
The TPA6100A2D is optimized for battery applications because of its low supply current, shutdown current, and
THD+N. To obtain the low-supply voltage range, the TPA6100A2D biases BYPASS to V
DD
/4. A resistor with a
resistance equal to R
F
must be added from the inputs to ground to allow the output to be biased at V
DD
/2.
When driving a 16- Ω load with 45-mW output power from 3.3 V, THD+N is 0.04% at 1 kHz, and less than 0.2%
across the audio band of 20 Hz to 20 kHz. For 28 mW into 32- Ω loads, the THD+N is reduced to less than 0.03%
at 1 kHz, and is less than 0.2% across the audio band of 20 Hz to 20 kHz.
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.
PRODUCTION DATA information is current as of publication date.
Copyright © 2000–2004, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.