Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Audio amplifier 1-channel (mono) or 2-channel (stereo) Class D PDIP 20

FEATURES APPLICATIONS

DESCRIPTION

1 Fm

MuteControl

PVCCL

TPA3125D2

SIMPLIFIED APPLICATIONCIRCUIT

PVCCR

VCLAMP

GAIN1

BYPASS

1 Fm

0.22 Fm

AGND

LeftChannel

RightChannel

10Vto26V

4-StepGainControl

ShutdownControl

LIN

RIN

BSR

BSL

PGNDR

PGNDL

0.22 Fm

33 Hm

470 Fm

0.22 Fm

1 Fm

470 Fm

GAIN0

AVCC

MUTE

ROUT

LOUT

S0267-02

0.22 Fm

TPA3125D2

www.ti.com

........................................................................................................................................................................................... SLOS611 – DECEMBER 2008

10-W STEREO CLASS-D AUDIO POWER AMPLIFIER

• Flat Panel Televisions

234

• 10-W/Ch (stereo SE) into an 8- Ω Load From a

24-V Supply

• DLP

TVs

• CRT TVs

• 20-W/Ch (mono BTL) into an 8- Ω Load from a

24-V Supply

• Powered Speakers

• Operates From 10 V to 26 V

• Operates From +24 V LCD Backlight Supply

The TPA3125D2 is a 10-W (per channel), efficient,

• Efficient Class-D Operation Eliminates Need

class-D audio power amplifier for driving stereo

for Heat Sinks

speakers in a single-ended configuration; or, a mono

• Four Selectable, Fixed-Gain Settings

speaker in a bridge-tied-load configuration. The

• Single-Ended Analog Inputs

TPA3125D2 can drive stereo speakers as low as 4 Ω .

The efficiency of the TPA3125D2 eliminates the need

• Thermal and Short-Circuit Protection With

for an external heat sink when playing music. The

Auto Recovery

gain of the amplifier is controlled by two gain select

• 20-Pin DIP Package

pins. The gain selections are 20, 26, 32, and 36 dB.

• Advanced Power-Off Pop Reduction

The patented start-up and shutdown sequences

minimize pop noise in the speakers without additional

circuitry.

The thru-hole package allows placement on

single-sided printed circuit boards.

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.

2 DLP is a registered trademark of Texas Instruments.

3 System Two, Audio Precision are trademarks of Audio Precision, Inc.

4 All other trademarks are the property of their respective owners.

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.

Summary of content (26 pages)

PAGE 1
TPA3125D2 www.ti.com ...........................................................................................................................................................................................
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TPA3125D2 SLOS611 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
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TPA3125D2 www.ti.com ........................................................................................................................................................................................... SLOS611 – DECEMBER 2008 ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range (unless otherwise noted) VCC (1) Supply voltage AVCC, PVCC Logic input voltage SD, MUTE, GAIN0, GAIN1 Analog input voltage RIN, LIN Continuous total power dissipation VALUE UNIT –0.3 to 30 V –0.
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TPA3125D2 SLOS611 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com DC CHARACTERISTICS TA = 25°C, VCC = 24 V, RL = 8Ω (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX 7.
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TPA3125D2 www.ti.com ...........................................................................................................................................................................................
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TPA3125D2 SLOS611 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS All tests are conducted at frequency = 1 kHz unless otherwise noted.
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TPA3125D2 www.ti.com ........................................................................................................................................................................................... SLOS611 – DECEMBER 2008 TYPICAL CHARACTERISTICS (continued) All tests are conducted at frequency = 1 kHz unless otherwise noted.
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TPA3125D2 SLOS611 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS (continued) All tests are conducted at frequency = 1 kHz unless otherwise noted. CROSSTALK vs FREQUENCY CROSSTALK vs FREQUENCY −20 −20 VCC = 18 V VO = 1 Vrms RL = 8 Ω (SE) PO = 0.
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TPA3125D2 www.ti.com ........................................................................................................................................................................................... SLOS611 – DECEMBER 2008 TYPICAL CHARACTERISTICS (continued) All tests are conducted at frequency = 1 kHz unless otherwise noted.
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TPA3125D2 SLOS611 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS (continued) All tests are conducted at frequency = 1 kHz unless otherwise noted. SUPPLY CURRENT vs OUTPUT POWER (PER CHANNEL) 1.5 SUPPLY CURRENT vs OUTPUT POWER (PER CHANNEL) 1.2 RL = 4 Ω (SE) Gain = 20 dB 1.0 ICC − Supply Current − A 1.
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TPA3125D2 www.ti.com ........................................................................................................................................................................................... SLOS611 – DECEMBER 2008 TYPICAL CHARACTERISTICS (continued) All tests are conducted at frequency = 1 kHz unless otherwise noted.
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TPA3125D2 SLOS611 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com TYPICAL CHARACTERISTICS (continued) All tests are conducted at frequency = 1 kHz unless otherwise noted. POWER SUPPLY REJECTION RATIO vs FREQUENCY - BTL 0 Power Supply Rejection Ratio − dB −10 −20 VCC = 24 V VO(ripple) = 0.
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TPA3125D2 www.ti.com ........................................................................................................................................................................................... SLOS611 – DECEMBER 2008 APPLICATION INFORMATION CLASS-D OPERATION This section focuses on the class-D operation of the TPA3125D2. Traditional Class-D Modulation Scheme The TPA3125D2 operates in AD mode. There are two main configurations that may be used.
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TPA3125D2 SLOS611 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com Table 2.
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TPA3125D2 www.ti.com ........................................................................................................................................................................................... SLOS611 – DECEMBER 2008 in high-gain applications. For this reason, a low-leakage tantalum or ceramic capacitor is the best choice.
PAGE 16
TPA3125D2 SLOS611 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com LOUT / ROUT LOUT Lfilter Lfilter Cfilter Cfilter ROUT Lfilter Cfilter Figure 27. BTL Filter Configuration Figure 28.
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TPA3125D2 www.ti.com ........................................................................................................................................................................................... SLOS611 – DECEMBER 2008 The circuit is designed for a CBYP value of 1 µF for best pop performance. The input capacitors should have the same value. A ceramic or tantalum low-ESR capacitor is recommended.
PAGE 18
TPA3125D2 SLOS611 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com • • • Grounding—The AVCC (pins 16 and 17) decoupling capacitor and BYPASS (pin 6) capacitor should each be grounded to analog ground (AGND, pins 7 and 8). The PVCCx decoupling capacitors and VCLAMP capacitors should each be grounded to power ground (PGND, pins 11 and 20).
PAGE 19
TPA3125D2 www.ti.com ........................................................................................................................................................................................... SLOS611 – DECEMBER 2008 VCC 22uH Shutdown Control 0.1uF Mute Control 470uF 1 2 3 4 5 6 7 8 9 10 1.0uF Left Input Right Input 1.0uF 1.0uF PVCCL SD MUTE LIN RIN BYPASS AGND AGND VCLAMP PVCCR PGNDL LOUT BSL AVCC AVCC GAIN0 GAIN1 BSR ROUT PGNDR 20 19 18 17 16 15 14 13 12 11 LEFT_OUT 4.7K 0.
PAGE 20
TPA3125D2 SLOS611 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.
PAGE 21
TPA3125D2 www.ti.com ........................................................................................................................................................................................... SLOS611 – DECEMBER 2008 Power Supply Signal Generator APA RL Analyzer 20 Hz - 20 kHz (a) Basic Class-AB Power Supply Lfilt Signal Generator Class-D APA Cfilt RL Analyzer 20 Hz - 20 kHz (b) Traditional Class-D Figure 31.
PAGE 22
TPA3125D2 SLOS611 – DECEMBER 2008 ........................................................................................................................................................................................... www.ti.com SE Input and SE Output (TPA3125D2 Stereo Configuration) The SE input and output configuration is used with class-D amplifiers. A block diagram of a fully SE measurement circuit is shown in Figure 32. SE inputs normally have one input pin per channel.
PAGE 23
TPA3125D2 www.ti.com ........................................................................................................................................................................................... SLOS611 – DECEMBER 2008 DIFFERENTIAL INPUT AND BTL OUTPUT (TPA3125D2 Mono Configuration) Many of the class-D APAs and many class-AB APAs have differential inputs and bridge-tied-load (BTL) outputs.
PAGE 24
PACKAGE OPTION ADDENDUM www.ti.com 19-Jan-2009 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing TPA3125D2N ACTIVE PDIP N Pins Package Eco Plan (2) Qty 20 20 Pb-Free (RoHS) Lead/Ball Finish CU NIPDAU MSL Peak Temp (3) N / A for Pkg Type (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.