Datasheet

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

APPLICATIONCIRCUIT

PGND

ROUT−

RHPIN

RLINEIN

RIN

LIN

LLINEIN

LHPIN

LOUT−

ROUT+

SE/BTL

HP/LINE

VOLUME

SEDIFF

SEMAX

AGND

BYPASS

FADE

SHUTDOWN

LOUT+

PGND

RightHP

AudioSource

PowerSupply

RightLine

AudioSource

LeftLine

AudioSource

LeftHP

AudioSource

PowerSupply

100kW

InFromDAC

Potentiometer

(DCVoltage)

(BYP)

SystemControl

Right

Speaker

Left

Speaker

Headphones

1kW

S001

DCVOLUMECONTROL

Volume[Pin21] − V

Gain − dB

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

−90

−80

−70

−60

−50

−40

−30

−20

−10

VolumeUp

VolumeDown

=5.0V

BTLOutput

R =NoLoad

GAIN(BTL)

VOLUMEVOLTAGE

TPA6013A4

www.ti.com

SLOS635 –NOVEMBER 2009

3-W STEREO AUDIO POWER AMPLIFIER

WITH ADVANCED DC VOLUME CONTROL

Check for Samples :TPA6013A4

FEATURES

DESCRIPTION

• Advanced 32-Steps DC Volume Control

– Steps from –40 to 18 dB

The TPA6013A4 is a stereo audio power amplifier

that drives 3 W/channel of continuous RMS power

– Fade Mode

into a 3-Ω load. Advanced dc volume control

– Maximum Volume Setting for SE Mode

minimizes external components and allows BTL

– Adjustable SE Volume Control

(speaker) volume control and SE (headphone)

Referenced to BTL Volume Control volume control. Notebook and pocket PCs benefit

from the integrated feature set that minimizes

• 3 W Into 3-Ω Speakers

external components without sacrificing functionality.

• Stereo Input MUX

To simplify design, the speaker volume level is

• Headphone Mode

adjusted by applying a dc voltage to the VOLUME

• Pin-to-pin compatible with TPA6011A4 and

terminal. Likewise, the delta between speaker volume

TPA6012A4

and headphone volume can be adjusted by applying

a dc voltage to the SEDIFF terminal. To avoid an

• 24-pin PowerPAD™ Package (PWP)

unexpected high volume level through the

headphones, a third terminal, SEMAX, limits the

APPLICATIONS

headphone volume level when a dc voltage is

• Notebook PC

applied. Finally, to ensure a smooth transition

• LCD Monitors

between active and shutdown modes, a fade mode

• Pocket PC

ramps the volume up and down.

Figure 1. Application Circuit and DC Volume Control

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.

2PowerPAD 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.

Summary of content (28 pages)

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TPA6013A4 www.ti.
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TPA6013A4 SLOS635 – NOVEMBER 2009 www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure.
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TPA6013A4 www.ti.com SLOS635 – NOVEMBER 2009 RECOMMENDED OPERATING CONDITIONS VSS Supply voltage, VDD, PVDD VIH High-level input voltage VIL Low-level input voltage TA Operating free-air temperature SE/BTL, HP/LINE, FADE MIN MAX 4.0 5.5 UNIT V 0.8 × VDD V 2 V SHUTDOWN SE/BTL, HP/LINE, FADE 0.6 × VDD SHUTDOWN V 0.8 V 85 °C TYP MAX UNIT –40 ELECTRICAL CHARACTERISTICS TA = 25°C, VDD = PVDD = 5.5 V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN 2 30 mV VDD = 5.
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TPA6013A4 SLOS635 – NOVEMBER 2009 www.ti.com PWP Package (Top View) PGND ROUT− PVDD 1 24 2 23 3 22 RHPIN RLINEIN RIN VDD 4 21 7 18 LIN LLINEIN LHPIN PVDD 8 17 9 16 10 15 11 14 LOUT− 12 13 5 20 6 19 ROUT+ SE/BTL HP/LINE VOLUME SEDIFF SEMAX AGND BYPASS FADE SHUTDOWN LOUT+ PGND P0110-01 PIN Functions PIN NAME NO.
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TPA6013A4 www.ti.com SLOS635 – NOVEMBER 2009 FUNCTIONAL BLOCK DIAGRAM RHPIN RLINEIN R MUX _ _ + HP/LINE ROUT+ + RIN BYP BYP + _ _ ROUT- + EN BYP SE/BTL HP/LINE SE/BTL MUX Control PVDD PGND VDD Power Management VOLUME 32-Step Volume Control SEDIFF SEMAX BYPASS SHUTDOWN AGND FADE LHPIN LLINEIN L MUX _ _ HP/LINE + LOUT+ + LIN BYP BYP + _ _ LOUT- + BYP EN SE/BTL NOTE: All resistor wipers are adjusted with 32-step volume control.
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TPA6013A4 SLOS635 – NOVEMBER 2009 www.ti.com Table 1. DC Volume Control (BTL Mode, VDD = 5 V) (1) VOLUME (PIN 21) (1) (2) 6 FROM (V) TO (V) GAIN OF AMPLIFIER (Typ) (2) 0.00 0.26 –85 0.33 0.37 –40 0.44 0.48 –34 0.56 0.59 –31 0.67 0.70 –28 0.78 0.82 –25 0.89 0.93 –22 1.01 1.04 –19 1.12 1.16 –16 1.23 1.27 –13 1.35 1.38 –10 1.46 1.49 –7 1.57 1.60 –4 1.68 1.72 –2 1.79 1.83 –0 1.91 1.94 2 2.02 2.06 4 2.13 2.17 6 2.25 2.28 8 2.36 2.39 10 2.47 2.
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TPA6013A4 www.ti.com SLOS635 – NOVEMBER 2009 Table 2. DC Volume Control (SE Mode, VDD = 5 V) (1) SE_VOLUME = VOLUME - SEDIFF or SEMAX (1) (2) FROM (V) TO (V) GAIN OF AMPLIFIER (Typ) 0.00 0.26 –85 (2) 0.33 0.37 –46 0.44 0.48 –40 0.56 0.59 –37 0.67 0.70 –34 0.78 0.82 –31 0.89 0.93 –28 1.01 1.04 –25 1.12 1.16 –22 1.23 1.27 –19 1.35 1.38 –16 1.46 1.49 –13 1.57 1.60 –10 1.68 1.72 –8 1.79 1.83 –6 (2) 1.91 1.94 –4 2.02 2.06 –2 2.13 2.17 0 (2) 2.25 2.
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TPA6013A4 SLOS635 – NOVEMBER 2009 www.ti.com TYPICAL CHARACTERISTICS Test conditions (unless otherwise noted) for typical operating performance: VDD = 5.
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TPA6013A4 SLOS635 – NOVEMBER 2009 TOTAL HARMONIC DISTORTION + NOISE (SE) vs FREQUENCY 10 10 0.1 0.01 0.001 100 1k f − Frequency − Hz 10k 20k PO = 10 mW PO = 40 mW PO = 80 mW VDD = 5.0 V RL = 32 Ω HPIN Input − SE Output Gain = 0 dB 1 0.1 0.01 0.001 20 100 1k f − Frequency − Hz 10k Figure 4. Figure 5. TOTAL HARMONIC DISTORTION + NOISE (SE) vs FREQUENCY TOTAL HARMONIC DISTORTION + NOISE (BTL) vs OUTPUT POWER 10 100 VO = 500 mVRMS VO = 1.0 VRMS VO = 1.75 VRMS VDD = 5.
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TPA6013A4 SLOS635 – NOVEMBER 2009 www.ti.com 100 TOTAL HARMONIC DISTORTION + NOISE (SE) vs OUTPUT VOLTAGE RL = 16 Ω RL = 32 Ω VDD = 5.0 V HPIN Input − SE Output Gain = 0 dB 10 1 0.1 0.01 100u 1m 10m 100m THD+N − Total Harmonic Distortion + Noise − % THD+N − Total Harmonic Distortion + Noise − % TOTAL HARMONIC DISTORTION + NOISE (SE) vs OUTPUT POWER 300m 100 10 VDD = 5.0 V RL = 10 kΩ HPIN Input − SE Output Gain = 0 dB 1 0.1 0.01 0.001 0.0 500.0m Figure 11.
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TPA6013A4 www.ti.com SLOS635 – NOVEMBER 2009 INTER-CHANNEL CROSSTALK vs FREQUENCY INPUT IMPEDANCE vs GAIN 0 120k VDD = 5.0 V RL = 4 Ω VIN = 1 VRMS − BTL Output Gain = 18 dB Differential Single−Ended 100k Input Impedance − Ω Inter−Channel Crosstalk − dB −20 Line Active HP Active −40 −60 −80 −100 80k 60k 40k 20k VDD = 5.0 V RL = No Load −120 20 100 1k f − Frequency − Hz 10k 0 −40 −35 −30 −25 −20 −15 −10 −5 Gain − dB 20k 10 Figure 17.
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TPA6013A4 SLOS635 – NOVEMBER 2009 www.ti.com APPLICATION INFORMATION SELECTION OF COMPONENTS Figure 22 and Figure 23 are schematic diagrams of typical notebook computer application circuits.
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TPA6013A4 www.ti.com SLOS635 – NOVEMBER 2009 Right Speaker ROUT+ 1 PGND SE/BTL CS 2 Power Supply NC 4 5 6 CS 100 kΩ 100 kΩ HP/LINE 1 kΩ PVDD RHPIN 21 VOLUME RLINEIN SEDIFF RIN SEMAX VDD AGND 20 Ci Right Positive Differential Input Signal 19 In From DAC or Potentiometer (DC Voltage) VDD 7 Ci Left Positive Differential Input Signal 8 LIN Headphones 18 C(BYP) 17 BYPASS Ci Left Negative Differential Input Signal 9 NC 10 11 Power Supply CS A.
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TPA6013A4 SLOS635 – NOVEMBER 2009 4 RHPIN 5 RLINEIN www.ti.com R MUX _ _ ROUT+ + 22 HP/LINE 6 RIN 24 + Input MUX Control Bypass Bypass VDD + _ _ ROUT- 2 + Bypass 100 kΩ CO 330 µF 1 kΩ EN SE/BTL 23 100 kΩ LOUT+ Figure 24. TPA6013A4 Resistor Divider Network Circuit Using a 1/8-in. (3,5 mm) stereo headphone jack, the control switch is closed when no plug is inserted. When closed the 100-kΩ/1-kΩ divider pulls the SE/BTL input low.
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TPA6013A4 www.ti.com SLOS635 – NOVEMBER 2009 Table 3. HP/LINE, SE/BTL, and Shutdown Functions INPUTS (1) (1) AMPLIFIER STATE HP/LINE SE/BTL SHUTDOWN INPUT OUTPUT X X Low X Mute Low Low High Line BTL Low High High Line SE High Low High HP BTL High High High HP SE Inputs should never be left unconnected.
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TPA6013A4 SLOS635 – NOVEMBER 2009 www.ti.com Device Shutdown Device Shutdown ROUT+ ROUT+ Figure 25. Shutdown Sequence in the Fade-on Mode Figure 26. Shutdown Sequence in the Fade-off Mode VOLUME, SEDIFF, AND SEMAX OPERATION Three pins labeled VOLUME, SEDIFF, and SEMAX control the BTL volume when driving speakers and the SE volume when driving headphones. All of these pins are controlled with a dc voltage, which should not exceed VDD.
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TPA6013A4 www.ti.com SLOS635 – NOVEMBER 2009 actually changes, is different depending on whether the voltage is increased or decreased as a result of the hysteresis about each trip point. The gaps in Table 1 and Table 2 can also be thought of as indeterminate states where the gain could be in the next higher gain step or the lower gain step depending on the direction the voltage is changing.
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TPA6013A4 SLOS635 – NOVEMBER 2009 www.ti.com INPUT RESISTANCE Each gain setting is achieved by varying the input resistance of the amplifier, which can range from its smallest value to over six times that value. As a result, if a single capacitor is used in the input high-pass filter, the –3 dB or cutoff frequency also changes by over six times. Rf C IN Input Signal Ri Figure 29. Resistor on Input for Cut-Off Frequency The input resistance at each gain setting is given in Figure 17.
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TPA6013A4 www.ti.com SLOS635 – NOVEMBER 2009 POWER SUPPLY DECOUPLING, C(S) The TPA6013A4 is a high-performance CMOS audio amplifier that requires adequate power supply decoupling to ensure the output total harmonic distortion (THD) is as low as possible. Power supply decoupling also prevents oscillations for long lead lengths between the amplifier and the speaker. The optimum decoupling is achieved by using two capacitors of different types that target different types of noise on the power supply leads.
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TPA6013A4 SLOS635 – NOVEMBER 2009 www.ti.com As Table 4 indicates, most of the bass response is attenuated into a 4-Ω load, an 8-Ω load is adequate, headphone response is good, and drive into line level inputs (a home stereo for example) is exceptional. USING LOW-ESR CAPACITORS Low-ESR capacitors are recommended throughout this applications section. A real (as opposed to ideal) capacitor can be modeled simply as a resistor in series with an ideal capacitor.
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TPA6013A4 www.ti.com SLOS635 – NOVEMBER 2009 In a typical computer sound channel operating at 5 V, bridging raises the power into an 8-Ω speaker from a singled-ended (SE, ground reference) limit of 250 mW to 1 W. In sound power that is a 6-dB improvement, which is loudness that can be heard. In addition to increased power there are frequency response concerns. Consider the single-supply SE configuration shown in Figure 31.
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TPA6013A4 SLOS635 – NOVEMBER 2009 www.ti.com IDD VO IDD(avg) V(LRMS) Figure 32. Voltage and Current Waveforms for BTL Amplifiers Although the voltages and currents for SE and BTL are sinusoidal in the load, currents from the supply are very different between SE and BTL configurations. In an SE application the current waveform is a half-wave rectified shape, whereas in BTL it is a full-wave rectified waveform. This means RMS conversion factors are different.
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TPA6013A4 www.ti.com SLOS635 – NOVEMBER 2009 Table 5. Efficiency vs Output Power in 5-V, 8-Ω BTL Systems (1) OUTPUT POWER (W) EFFICIENCY (%) PEAK VOLTAGE (V) INTERNAL DISSIPATION (W) 0.25 31.4 2.00 0.55 0.50 44.4 2.83 0.62 1.00 62.8 4.00 0.59 1.25 70.2 4.47 (1) 0.53 High peak voltages cause the THD to increase. A final point to remember about Class-AB amplifiers (either SE or BTL) is how to manipulate the terms in the efficiency equation to utmost advantage when possible.
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TPA6013A4 SLOS635 – NOVEMBER 2009 www.ti.com Table 6. TPA6013A4 Power Rating, 5-V, 3-Ω Stereo PEAK OUTPUT POWER (W) AVERAGE OUTPUT POWER POWER DISSIPATION (W/Channel) MAXIMUM AMBIENT TEMPERATURE 4 2 W (3 dB) 1.7 –3°C 4 1 W (6 dB) 1.6 6°C 4 500 mW (9 dB) 1.4 24°C 4 250 mW (12 dB) 1.1 51°C 4 125 mW (15 dB) 0.8 78°C 4 63 mW (18 dB) 0.6 96°C Table 7.
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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 JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.