TPA0132_15 Datasheet, PDF (1/30 Pages) Texas Instruments – 2.8-W STEREO AUDIO POWER AMPLIFIER WITH DC VOLUME CONTROL

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TPA0132
SLOS223E – MAY 1999 – REVISED SEPTEMBER 2004
2.8-W STEREO AUDIO POWER AMPLIFIER
WITH DC VOLUME CONTROL
FEATURES
• Compatible With PC 99 Desktop Line-Out Into
10-kΩ Load
• Compatible With PC 99 Portable Into 8-Ω Load
• Internal Gain Control, Which Eliminates
External Gain-Setting Resistors
• DC Volume Control From 20 dB to -40 dB
• 2.8-W/Ch Output Power Into a 3-Ω Load
• PC-Beep Input
• Depop Circuitry
• Stereo Input MUX
• Fully Differential Input
• Low Supply Current and Shutdown Current
• Surface-Mount Power Packaging 24-Pin
TSSOP PowerPAD™
GND
PCB ENABLE
VOLUME
LOUT+
LLINEIN
LHPIN
PV_DD
RIN
LOUT–
LIN
BYPASS
GND
PWP PACKAGE
(TOP VIEW)
1
24
2
23
3
22
4
21
5
20
6
19
7
18
8
17
9
16
10
15
11
14
12
13
GND
RLINEIN
SHUTDOWN
ROUT+
RHPIN
V_DD
PV_DD
CLK
ROUT–
SE/BTL
PC-BEEP
GND
DESCRIPTION
The TPA0132 is a stereo audio power amplifier in a 24-pin TSSOP thermally enhanced package capable of
delivering 2.8 W of continuous RMS power per channel into 3-Ω loads.
This device minimizes the number of external components needed, which simplifies the design and frees up
board space for other features. When driving 1 W into 8-Ω speakers, the TPA0132 has less than 0.4% THD+N
across its specified frequency range. Included within this device is integrated depop circuitry that virtually
eliminates transients that cause noise in the speakers.
Amplifier gain is controlled by means of a dc voltage input on the VOLUME terminal. There are 31 discrete steps
covering the range of 20 dB (maximum volume setting) to -40 dB (minimum volume setting) in 2-dB steps. When
the VOLUME terminal exceeds 3.54 V, the device is muted. An internal input MUX allows two sets of stereo
inputs to the amplifier. In notebook applications, where internal speakers are driven as bridge-tied load (BTL) and
the line outputs (often headphone drive) are required to be single-ended (SE), the TPA0132 automatically
switches into SE mode when the SE/BTL input is activated, and this effectively reduces the gain by 6 dB.
The TPA0132 consumes only 10 mA of supply current during normal operation. A shutdown mode is included
that reduces the supply current to 150 µA.
The PowerPAD package (PWP) delivers a level of thermal performance that was previously achievable only in
TO-220-type packages. Thermal impedances of approximately 35°C/W are readily realized in multilayer PCB
applications. This allows the TPA0132 to operate at full power into 8-Ω loads at ambient temperatures of 85°C.
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 © 1999–2004, Texas Instruments Incorporated