TPA0152_16 Datasheet, PDF (1/36 Pages) Texas Instruments – 2.8-W STEREO AUDIO POWER AMPLIFIER WITH DIGITAL VOLUME CONTROL

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TPA0152
SLOS246F – JUNE 1999 – REVISED SEPTEMBER 2004
2.8-W STEREO AUDIO POWER AMPLIFIER
WITH DIGITAL 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
• Digital 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
UP
DOWN
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 TPA0152 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 TPA0152 has less than 0.3% THD+N
across its specified frequency range. The integrated depop circuitry virtually eliminates transients that cause
noise in the speakers.
The overall gain of the amplifier is controlled digitally by the UP and DOWN terminals. At power up, the gain is
set at the lowest level which is -85 dB. It can then be adjusted to any of 31 discrete steps by pulling the voltage
down at the desired pin to logic low. The gain is adjusted in the initial stage of the amplifier as opposed to the
power output stage. As a result, the THD changes little over all volume levels.
An internal input MUX allows two sets of stereo inputs to the amplifier. In notebook applications, where internal
speakers are driven as BTL and the line outputs (often headphone drive) are required to be SE, the TPA0152
automatically switches into SE mode when the SE/BTL input is activated. This effectively reduces the gain by 6
dB. The TPA0152 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 truly realized in multilayer PCB
applications. This allows the TPA0152 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