TPA6100A2D_06 Datasheet, PDF (1/11 Pages) Texas Instruments – 50-mW ULTRALOW VOLTAGE STEREO HEADPHONE AUDIO POWER AMPLIFIER

TPA6100A2D
www.ti.com
SLOS269B – JUNE 2000 – REVISED SEPTEMBER 2004
50-mW ULTRALOW VOLTAGE STEREO HEADPHONE AUDIO POWER AMPLIFIER
FEATURES
• 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.
D PACKAGE
(TOP VIEW)
BYPASS
1
GND
2
SHUTDOWN
3
IN2–
4
8 IN1–
7
V_O1
6
V_DD
5
V_O2
DGK PACKAGE
(TOP VIEW)
BYPASS
1
GND
2
SHUTDOWN
3
IN2–
4
8 IN1–
7
V_O1
6
V_DD
5
V_O2
DESCRIPTION
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.
TYPICAL APPLICATION CIRCUIT
Audio
Input
R_I
C_I
R_F
8 ^{IN 1−}
R
1 ^BYPASS
V_DD/4
−
+
V_DD 6
V_O1 7
C_C
Audio
Input
C_B
R_I
C_I
4 ^{IN 2−}
R
From Shutdown
Control Circuit
3 SHUTDOWN
R_F
−
V_O2 5
+
Bias
Control
C_C
2
V_DD
C_S
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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2000–2004, Texas Instruments Incorporated