Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Audio amplifier 2-channel (stereo) Class D HTSSOP 24

1 Fm

MuteControl

PVCCL

TPA3123D2

TPA3120D2

SIMPLIFIED APPLICATIONCIRCUIT

PVCCR

VCLAMP

GAIN1

BYPASS

1 Fm

0.22 Fm

AGND

LeftChannel

RightChannel

10Vto30V

}

4-StepGain

Control

Shutdown

Control

LIN

RIN

BSR

BSL

PGNDR

PGNDL

0.22 Fm

22 Hm

0.68 Fm

470 Fm

0.68 Fm

1 Fm

470 Fm

GAIN0

AVCC

MUTE

ROUT

LOUT

TPA3123D2

www.ti.com

SLOS541C –JULY 2007–REVISED AUGUST 2010

25-W STEREO CLASS-D AUDIO POWER AMPLIFIER

Check for Samples: TPA3123D2

FEATURES

APPLICATIONS

• Televisions

• 25-W/ch into a 4-Ω Load from a 27-V Supply

• 20-W/ch into a 4-Ω Load from a 24-V Supply

DESCRIPTION

• Operates from 10 V to 30 V

The TPA3123D2 is a 25-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

• Internal Oscillator (No External Components TPA3123D2 can drive stereo speakers as low as 4 Ω.

The efficiency of the TPA3123D2 eliminates the need

Required)

for an external heat sink when playing music.

• Single-Ended Analog Inputs

The gain of the amplifier is controlled by two gain

• Thermal and Short-Circuit Protection With

select pins. The gain selections are 20, 26, 32,

Auto Recovery

36 dB.

• Space-Saving Surface-Mount 24-Pin TSSOP

The patented start-up and shut-down sequences

Package

minimize pop noise in the speakers without additional

• Pin-to-Pin compatible with TPA3120D2

circuitry.

• Advanced Power-Off Pop Reduction

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.

2System Two, Audio Precision are trademarks of Audio Precision, Inc.

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 (30 pages)

PAGE 1
TPA3123D2 www.ti.
PAGE 2
TPA3123D2 SLOS541C – JULY 2007 – REVISED AUGUST 2010 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. PWP (TSSOP) PACKAGE (TOP VIEW) PVCCL SD PVCCL MUTE LIN RIN BYPASS AGND AGND PVCCR VCLAMP PVCCR 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 PGNDL PGNDL LOUT BSL AVCC AVCC GAIN0 GAIN1 BSR ROUT PGNDR PGNDR Table 1.
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TPA3123D2 www.ti.com SLOS541C – JULY 2007 – REVISED AUGUST 2010 ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range (unless otherwise noted) (1) VCC Supply voltage AVCC, PVCC VI Logic input voltage SD, MUTE, GAIN0, GAIN1 VIN Analog input voltage RIN, LIN Continuous total power dissipation VALUE UNIT –0.3 to 36 V –0.3 to VCC + 0.3 V –0.
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TPA3123D2 SLOS541C – JULY 2007 – REVISED AUGUST 2010 www.ti.com DC CHARACTERISTICS TA = 25°C, VCC = 24 V, RL = 4 Ω (unless otherwise noted) PARAMETER TEST CONDITIONS | VOS | Class-D output offset voltage (measured differentially in BTL mode as shown in Figure 30) VI = 0 V, AV = 36 dB V(BYPASS) Bypass output voltage No load ICC(q) Quiescent supply current SD = 2 V, MUTE = 0 V, No load ICC(q) Quiescent supply current in mute mode MUTE = 0.
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TPA3123D2 www.ti.
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TPA3123D2 SLOS541C – JULY 2007 – REVISED AUGUST 2010 www.ti.com TYPICAL CHARACTERISTICS All tests are made at frequency = 1 kHz unless otherwise noted. TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY 10 THD+N - Total Harmonic Distortion + Noise - % THD+N - Total Harmonic Distortion + Noise - % 10 VCC = 18 V RL = 4 W (SE) Gain = 20 dB 1 PO = 5 W PO = 1 W 0.1 PO = 2.5 W 0.01 20 1k 100 VCC = 24 V RL = 4 W (SE) Gain = 20 dB 1 PO = 10 W PO = 1 W 0.
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TPA3123D2 www.ti.com SLOS541C – JULY 2007 – REVISED AUGUST 2010 TYPICAL CHARACTERISTICS (continued) All tests are made at frequency = 1 kHz unless otherwise noted. 10 CROSSTALK vs FREQUENCY 0 RL = 8 W (SE) Gain = 20 dB VCC = 24 V 1 -10 VCC = 18 V VO = 1 Vrms -20 RL = 4 W (SE) Gain = 20 dB -30 VCC = 18 V Crosstalk - dB THD+N - Total Harmonic Distortion + Noise - % TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER VCC = 12 V -40 -50 L to R -60 0.1 -70 -80 R to L -90 0.
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TPA3123D2 SLOS541C – JULY 2007 – REVISED AUGUST 2010 www.ti.com TYPICAL CHARACTERISTICS (continued) All tests are made at frequency = 1 kHz unless otherwise noted. GAIN/PHASE vs FREQUENCY OUTPUT POWER vs SUPPLY VOLTAGE 200 22.5 32 30 150 28 Gain 20 0 15 Phase -50 12.5 VCC = 24 V RL = 8 W (SE) Gain = 20 dB Lfilt = 47 mH 10 7.5 -100 PO - Output Power - W 50 Phase - o Gain - dB 26 100 17.5 -150 22 THD = 10% 20 18 16 14 12 THD = 1% 10 6 -200 4 5 20 24 8 Cfilt = 0.
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TPA3123D2 www.ti.com SLOS541C – JULY 2007 – REVISED AUGUST 2010 TYPICAL CHARACTERISTICS (continued) All tests are made at frequency = 1 kHz unless otherwise noted. EFFICIENCY vs OUTPUT POWER 2 90 1.8 80 1.6 24 V 18 V 12 V ICC − Supply Current − A 100 70 Efficiency - % SUPPLY CURRENT vs OUTPUT POWER 60 50 40 30 RL = 4 W (SE) Gain = 20 dB 1.4 1.2 1 24 V 0.8 0.6 18 V 0.4 20 12 V RL = 8 W (SE) Gain = 20 dB 10 0.
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TPA3123D2 SLOS541C – JULY 2007 – REVISED AUGUST 2010 www.ti.com TYPICAL CHARACTERISTICS (continued) All tests are made at frequency = 1 kHz unless otherwise noted. TOTAL HARMONIC DISTORTION + NOISE vs FREQUENCY TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER THD+N - Total Harmonic Distortion + Noise - % THD+N - Total Harmonic Distortion + Noise - % 10 VCC = 24 V RL = 8 W (BTL) Gain = 20 dB PO = 20 W 1 0.1 PO = 5 W PO = 1 W 0.01 0.
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TPA3123D2 www.ti.com SLOS541C – JULY 2007 – REVISED AUGUST 2010 TYPICAL CHARACTERISTICS (continued) All tests are made at frequency = 1 kHz unless otherwise noted.
PAGE 12
TPA3123D2 SLOS541C – JULY 2007 – REVISED AUGUST 2010 www.ti.com APPLICATION INFORMATION CLASS-D OPERATION This section focuses on the class-D operation of the TPA3123D2. Traditional Class-D Modulation Scheme The TPA3123D2 operates in AD mode. There are two main configurations that may be used. For stereo operation, the TPA3123D2 should be configured in a single-ended (SE) half-bridge amplifier. For mono applications, TPA3123D2 may be used as a bridge-tied-load (BTL) amplifier.
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TPA3123D2 www.ti.com SLOS541C – JULY 2007 – REVISED AUGUST 2010 Several things can be done to relieve power-supply pumping. The lowest impact is to operate the two inputs out of phase 180° and reverse the speaker connections. Because most audio is highly correlated, this causes the supply pumping to be out of phase and not as severe. If this is not enough, the amount of bulk capacitance on the supply must be increased.
PAGE 14
TPA3123D2 SLOS541C – JULY 2007 – REVISED AUGUST 2010 www.ti.com INPUT CAPACITOR, CI In the typical application, an input capacitor (Ci) is required to allow the amplifier to bias the input signal to the proper dc level for optimum operation. In this case, Ci and the input impedance of the amplifier (Zi) form a high-pass filter with the corner frequency determined in Equation 2.
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TPA3123D2 www.ti.com SLOS541C – JULY 2007 – REVISED AUGUST 2010 Output Filter and Frequency Response For the best frequency response, a flat-passband output filter (second-order Butterworth) may be used. The output filter components consist of the series inductor and capacitor to ground at the LOUT and ROUT pins. There are several possible configurations depending on the speaker impedance, and whether the output configuration is single ended (SE) or bridge-tied load (BTL).
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TPA3123D2 SLOS541C – JULY 2007 – REVISED AUGUST 2010 www.ti.com VCLAMP Capacitor To ensure that the maximum gate-to-source voltage for the NMOS output transistors is not exceeded, one internal regulator clamps the gate voltage. One 1-mF capacitor must be connected from VCLAMP (pin 11) to ground and must be rated for at least 16 V. The voltages at the VCLAMP terminal may vary with VCC and may not be used for powering any other circuitry.
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TPA3123D2 www.ti.com SLOS541C – JULY 2007 – REVISED AUGUST 2010 THERMAL PROTECTION Thermal protection on the TPA3123D2 prevents damage to the device when the internal die temperature exceeds 150°C. There is a ±15°C tolerance on this trip point from device to device. Once the die temperature exceeds the thermal set point, the device enters into the shutdown state and the outputs are disabled. This is not a latched fault. The thermal fault is cleared once the temperature of the die is reduced by 30°C.
PAGE 18
TPA3123D2 SLOS541C – JULY 2007 – REVISED AUGUST 2010 www.ti.com VCC 470 mF 22 mH 470 mF +LOUT 1.0 mF 470 mF 1 2 3 4 5 6 7 8 9 10 11 12 Right In 1.0 mF 1.0 mF PVCCL PGNDL SD PGNDL PVCCL LOUT MUTE BSL LIN TPA3123D2 AVCC RIN AVCC BYPASS GAIN0 AGND GAIN1 AGND BSR PVCCR ROUT VCLAMP PGNDR PVCCR PGNDR THERMAL 1.0 mF Left In 24 23 22 21 20 19 18 17 16 15 14 13 0.68 mF 0.22 mF -LOUT VCC -ROUT 0.22 mF 0.68 mF 25 Shutdown Control 22 mH +ROUT Mute Control 470 mF 1.0 mF 1.0 mF 0.
PAGE 19
TPA3123D2 www.ti.com SLOS541C – JULY 2007 – REVISED AUGUST 2010 BASIC MEASUREMENT SYSTEM This application note focuses on methods that use the basic equipment listed below: • Audio analyzer or spectrum analyzer • Digital multimeter (DMM) • Oscilloscope • Twisted-pair wires • Signal generator • Power resistor(s) • Linear regulated power supply • Filter components • EVM or other complete audio circuit Figure 29 shows the block diagrams of basic measurement systems for class-AB and class-D amplifiers.
PAGE 20
TPA3123D2 SLOS541C – JULY 2007 – REVISED AUGUST 2010 www.ti.com 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 29.
PAGE 21
TPA3123D2 www.ti.com SLOS541C – JULY 2007 – REVISED AUGUST 2010 SE Input and SE Output (TPA3123D2 Stereo Configuration) The SE input and output configuration is used with class-AB amplifiers. A block diagram of a fully SE measurement circuit is shown in Figure 30. SE inputs normally have one input pin per channel. In some cases, two pins are present; one is the signal and the other is ground.
PAGE 22
TPA3123D2 SLOS541C – JULY 2007 – REVISED AUGUST 2010 www.ti.com DIFFERENTIAL INPUT AND BTL OUTPUT (TPA3123D2 Mono Configuration) Many of the class-D APAs and many class-AB APAs have differential inputs and bridge-tied-load (BTL) outputs. Differential inputs have two input pins per channel and amplify the difference in voltage between the pins. Differential inputs reduce the common-mode noise and distortion of the input circuit. BTL is a term commonly used in audio to describe differential outputs.
PAGE 23
TPA3123D2 www.ti.com SLOS541C – JULY 2007 – REVISED AUGUST 2010 REVISION HISTORY Changes from Original (July 2007) to Revision A • Page Changed the device status From: Product Preview To: Production ..................................................................................... 1 Changes from Revision A (August 2007) to Revision B • Page Changed the INPUT IMPEDANCE values in Table 2. ........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
PAGE 25
PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device TPA3123D2PWPR Package Package Pins Type Drawing SPQ HTSSOP 2000 PWP 24 Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 330.0 16.4 Pack Materials-Page 1 6.95 B0 (mm) K0 (mm) P1 (mm) 8.3 1.6 8.0 W Pin1 (mm) Quadrant 16.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPA3123D2PWPR HTSSOP PWP 24 2000 367.0 367.0 38.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46C and to discontinue any product or service per JESD48B. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.