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TPA0252PWP Datasheet

  • TPA0252PWP

  • 2.8-W STEREO AUDIO POWER AMPLIFIER WITH DIGITAL VOLUME CONTR...

  • 29頁(yè)

  • TI

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TPA0252
www.ti.com
SLOS288B 鈥?JUNE 2000 鈥?REVISED SEPTEMBER 2004
2.8-W STEREO AUDIO POWER AMPLIFIER
WITH DIGITAL VOLUME CONTROL
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鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
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Internal Memory Restores Volume Setting
After Shutdown or Power Down
Digital Volume Control From 20 dB to -40 dB
2.8-W/Ch Output Power Into 3-鈩?Load
Stereo Input MUX
Compatible With PC 99 Desktop Line-Out Into
10-k鈩?Load
Compatible With PC 99 Portable Into 8-鈩?Load
PC-Beep Input
Depop Circuitry
Fully Differential Input
Low Supply Current and Shutdown Current
Surface-Mount Power Packaging 24-Pin
TSSOP PowerPAD鈩?/div>
PWP PACKAGE
(TOP VIEW)
LOUT鈥?/div>
SHUTDOWN
PV
DD
UP
DOWN
CLK
BYPASS
PV
DD
VAUX
PC-BEEP
ROUT鈥?/div>
GND
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
GND
LOUT+
SE/BTL
LIN
LLINEIN
LHPIN
V
DD
RHPIN
RLINEIN
RIN
HP/LINE
ROUT+
DESCRIPTION
The TPA0252 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-鈩?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-鈩?speakers, the TPA0252 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.
Amplifier gain is controlled by two terminals, UP and DOWN. There are 31 discrete steps covering the range of
20 dB (maximum volume setting) to 鈥?0 dB (minimum volume setting) in 2 dB steps. By pressing either button
momentarily, the volume steps up or down 2 dB. If a button is held down, the device starts stepping through
volume settings at a rate determined by the capacitor on the CLK terminal.
An internal input MUX, controlled by the HP/LINE pin, allows two sets of stereo inputs to the amplifier. In
notebook applications, where internal speakers are driven as bridge-tied loads (BTL) and the line outputs (often
headphone drive) are required to be single-ended (SE), the TPA0252 automatically switches into SE mode when
the SE/BTL input is activated. This effectively reduces the gain by 6 dB.
The TPA0252 includes a VAUX terminal that is used to power the volume-setting registers when the device is in
SHUTDOWN, and even if the main V
DD
power supply is removed. As long as the VAUX terminal is held above 3
V, the registers are maintained. If the VAUX terminal is allowed to go below 3 V, then the data in the registers is
lost, and the default gain of 鈥?0 dB is loaded into the registers.
The TPA0252 consumes only 9 mA of supply current during normal operation. A miserly shutdown mode
reduces the supply current to 150 碌A(chǔ).
The PowerPAD鈩?package (PWP) delivers a level of thermal performance that was previously achievable only in
TO-220-type packages. Thermal impedances of approximately 35擄C/W are truly realized in multilayer PCB
applications. This allows the TPA0252 to operate at full power into 8-鈩?loads at ambient temperatures of 85擄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 漏 2000鈥?004, Texas Instruments Incorporated

TPA0252PWP 產(chǎn)品屬性

  • 60

  • 集成電路 (IC)

  • 線性 - 音頻放大器

  • -

  • AB 類

  • 2-通道（立體聲）帶立體聲耳機(jī)

  • 2.8W x 2 @ 3 歐姆

  • 4.5 V ~ 5.5 V

  • 消除爆音，差分輸入，輸入多路復(fù)用器，靜音，關(guān)機(jī)，熱保護(hù)，音量控制

  • 表面貼裝

  • 24-HTSSOP

  • 24-TSSOP（0.173"，4.40mm）裸露焊盤

  • 管件

  • 296-7005-5

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