TEXAS INSTRUMENTS TPA6040A4 Technical data

www.ti.com

CODEC

VDD

SPKR

SPKR_LIN–

BYPASS

SGND

HP_EN

SPKR_EN

SPKR_RIN–

SPKR_LIN+

HP_INR

HP_INL

HPVDD

CPVDD

VDD

REG_EN

REG_OUT

SPKR_RIN+

ROUT+

LOUT+

ROUT–

LOUT–

SPVDD

CPVSS

C1P

HPVSS

SPGND

CPGND

C1N

GAIN0

GAIN1

OUTL

OUTR

HPR

HPL

SPKL

TPA6040A4

Shutdown

Control

3V – 5.5V

4.5V – 5.5V
RegulatorEnable

4.75V(ToCODEC)

4.5V – 5.5V

Gain
Control

2-W STEREO AUDIO POWER AMPLIFIER

WITH DirectPath™ STEREO HEADPHONE DRIVE AND REGULATOR

FEATURES DESCRIPTION

• Microsoft™Windows Vista™ Compliant

• Fully Differential Architecture and High PSRR

Provide Excellent RF Rectification Immunity

• 2-W, 10% THD+N Into 4- Ω Speakers and
85-mW, 1% THD+N Into 16- Ω Headphones
From 5-V Supply

• DirectPath™ Headphone Amplifier Eliminates
Output Capacitors

• Internal 4-Step Speaker Gain Control: 6, 10,

15.6, 21.6 dB and Fixed –1.5-V/V Headphone

• 4.75-V Low Dropout Regulator for CODEC

• Independent Shutdown Controls for Speaker,

Headphone Amplifier, and Low Dropout
Regulator (LDO)

• Output Short-Circuit and Thermal Protection

(1)

TPA6040A4

SLOS519A – APRIL 2007 – REVISED APRIL 2007

The TPA6040A4 is a stereo audio power amplifier
and DirectPath™ headphone amplifier in a thermally
enhanced, space-saving, 32-pin QFN package. The
speaker amplifier is capable of driving 2 W per
channel continuously into 4- Ω loads at 5 V. The
headphone amplifier achieves a minimum of 85 mW
at 1% THD+N from a 5-V supply. A built-in internal
4-step gain control for the speaker amplifier and a
fixed –1.5 V/V gain for the headphone amplifier
minimizes external components needed.

Independent shutdown control and dedicated inputs
for the speaker and headphone allow the
TPA6040A4 to simultaneously drive both
headphones and internal speakers. Differential inputs
to the speaker amplifiers offer superior power-supply
and common-mode noise rejection.

APPLICATIONS

• Notebook Computers

• Portable DVD

(1) US Patent Number 5289137

SIMPLIFIED APPLICATION CIRCUIT

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.

DirectPath, PowerPAD are trademarks of Texas Instruments.
Microsoft, Windows Vista are trademarks of Microsoft Corporation.

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 © 2007, Texas Instruments Incorporated

www.ti.com

Bias Control

LDO

HP_EN

BYPASS

REG_EN

SPKR_RIN+

SPKR_RIN–

Gain Control

SPKR_LIN+

SPKR_LIN–

Charge Pump

CPVDD

CPVSS

CPGND

C1P C1N

VDD

+

–

–

+

+

–

–

+

ROUT+

ROUT–

SPVDD

SPGND

LOUT+

LOUT–

SPVDD

SPGND

HP_INL

HP_INR

HP_OUTL

HP_OUTR

HPVDD

–

–

+

+

1 mF

1 mF

1 Fm

GND

GAIN0

GAIN1

HPVDD

HPVSS

SPKR_EN

0.47 Fm

1 Fm

1 mF

1 mF

1 mF

1 mF

1 mF

1 mF

1 mF

1 mF

HPVDD

SPGND

3 V 5.5 V–

SPVDD4.5 V – 5.5 V

HPVSS

(4.75V Output)
REG_OUT

TPA6040A4

SLOS519A – APRIL 2007 – REVISED APRIL 2007

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.

Functional Block Diagram

2

Submit Documentation Feedback

www.ti.com

BYPASSSPKR_RIN–

Thermal

Pad

CPVDD

GAIN1

32931103011291228132714261525

16

24

1

23

2

22

3

21

4

20

5

196

187

178

SPKR_EN

GAIN0

HP_EN

VDD

SPGND

REG_OUT

ROUT+

SGND

ROUT–

HP_INL

SPVDD

HP_INR

HPVDD

REG_EN

TPA6040A4RHB

(TOP VIEW)

SPKR_RIN+

C1P

SPKR_LIN+

CPGND

SPKR_LIN–

C1N

SPGND

CPVSS

LOUT+

HPVSS

LOUT–

HP_OUTR

SPVDD

HP_OUTL

SLOS519A – APRIL 2007 – REVISED APRIL 2007

AVAILABLE PACKAGE OPTIONS

T

A

PACKAGED DEVICE

32-Pin QFN (RHB)

–40 ° C to 85 ° C TPA6040A4RHB RHB

(1) The RHB package is available taped and reeled. To order a taped and reeled part, add the suffix R to

the part number (e.g., TPA6040A4RHBR).

(2) For the most current package and ordering information, see the Package Option Addendum at the end

of this document, or see the TI website at www.ti.com .

(1) (2)

SYMBOL

TPA6040A4

TERMINAL FUNCTIONS

TERMINAL

NAME NO.

SPKR_RIN– 1 I Right-channel negative differential audio input for speaker amplifier
SPKR_RIN+ 2 I Right-channel positive differential audio input for speaker amplifier
SPKR_LIN+ 3 I Left-channel positive differential audio input for speaker amplifier
SPKR_LIN– 4 I Left-channel negative differential audio input for speaker amplifier
SPGND 5, 21 P Speaker power ground
LOUT+ 6 O Left-channel positive audio output
LOUT– 7 O Left-channel negative audio output
SPVDD 8, 18 P Supply voltage terminal for speaker amplifier
CPVDD 9 P Charge pump positive supply, connect to HPVDD via star connection
C1P 10 I/O Charge pump flying capacitor positive terminal
CPGND 11 P Charge pump ground
C1N 12 I/O Charge pump flying capacitor negative terminal
CPVSS 13 P Charge pump output (negative supply for headphone amplifier), connect to HPVSS
HPVSS 14 P Headphone amplifier negative supply, connect to CPVSS
HP_OUTR 15 O Right-channel capacitor-free headphone output
HP_OUTL 16 O Left-channel capacitor-free headphone output
HPVDD 17 P Headphone amplifier supply voltage, connect to CPVDD
ROUT– 19 O Right-channel negative audio output

I/O/P DESCRIPTION

Submit Documentation Feedback

3

www.ti.com

TPA6040A4

SLOS519A – APRIL 2007 – REVISED APRIL 2007

TERMINAL FUNCTIONS (continued)

TERMINAL

NAME NO.

ROUT+ 20 O Right-channel positive audio output
HP_EN 22 I Headphone channel enable logic input; active high enable. HIGH=ENABLE.
SPKR_EN 23 I Speaker channel enable logic input; active low enable. LOW=ENABLE.
BYPASS 24 P Common-mode bias voltage for speaker preamplifiers
REG_EN 25 I Enable pin (Active HIGH) for turning on/off LDO. HIGH=ENABLE
HP_INR 26 I Headphone right-channel audio input
HP_INL 27 I Headphone left-channel audio input
SGND 28 P Signal ground, connect to CPGND and SPGND
REG_OUT 29 O Regulated 4.75-V output
VDD 30 P Positive power supply
GAIN0 31 I Bit 0, MSB, of gain select bits
GAIN1 32 I Bit 1, LSB, of gain select bits

Thermal Pad Die Pad P

I/O/P DESCRIPTION

Solder the thermal pad on the bottom of the QFN package to the GND plane of the PCB. It is required for
mechanical stability and will enhance thermal performance.

ABSOLUTE MAXIMUM RATINGS

over operating free-air temperature range (unless otherwise noted)

Supply voltage HPVDD, VDD, SPVDD, CPVDD -0.3 to 6 V

SPKR_LIN+, SPKR_LIN-, SPKR_RIN+, SPKR_RIN-, -0.3 to 6.3

V

Input voltage V

I

Continuous total power dissipation See Dissipation Rating Table

T

Operating free-air temperature range -40 to 85 ° C

A

T

Operating junction temperature range -40 to 150 ° C

J

T

Storage temperature range -65 to 150 ° C

stg

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 260 ° C
Electrostatic discharge HBM for HP_OUTL and HP_OUTR 8 kV

Electrostatic discharge,
all other pins

(1) Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings

only, and functional operations of the device at these or any other conditions beyond those indicated under recommended operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

HP_EN,GAIN0, GAIN1, SPK_EN, REG_EN
HP_INL, HP_INR HP Enabled -3.5 to 3.5
HP_INL, HP_INR HP not Enabled -0.3 to 3.5

CDM 500 V
HBM 2 kV

(1)

VALUE UNIT

DISSIPATION RATINGS

PACKAGE

(1) The PowerPAD™ must be soldered to a thermal land on the printed-circuit board. Refer to the Texas Instruments document,

PowerPAD™ Thermally Enhanced Package application report (literature number SLMA002) for more information regarding the
PowerPAD™ package.

(1)

RHB 5.06 W 40 mW/ ° C 4.04 W 3.23 W

TA≤ 25 ° C DERATING FACTOR TA= 70 ° C TA= 85 ° C

RECOMMENDED OPERATING CONDITIONS

Supply voltage VDD, SPVDD 4.5 5.5 V
Supply voltage HPVDD, CPVDD 3 5.5 V

4

MIN MAX UNIT

Submit Documentation Feedback

www.ti.com

RECOMMENDED OPERATING CONDITIONS (continued)

V

High-level input voltage SPKR_EN, HP_EN, GAIN0, GAIN1, REG_EN 2 V

IH

V

Low-level input voltage SPKR_EN, HP_EN, GAIN0, GAIN1, REG_EN 0.8 V

IL

T

Operating free-air temperature -40 85 ° C

A

GENERAL DC ELECTRICAL CHARACTERISTICS

TA= 25 ° C, VDD = SPVDD = HPVDD = CPVDD = 5 V (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

I

IH

I

IL

I

DD(Speaker)

I

DD(HP)

I

DD(REG)

I

DD(SD)

High-level input current 0.02 1 µ A

Low-level input current 0.02 1 µ A
Supply current, speaker amplifier

ONLY enabled
Supply current, headphone

amplifier ONLY enabled
Supply current, regulator ONLY

enabled
Supply current, shutdown mode SPKR_EN = 2 V, HP_EN = REG_EN = 0 V 2.5 5 µ A

SPKR_EN, HP_EN, GAIN0, GAIN1,
REG_EN = VDD

SPKR_EN, HP_EN, GAIN0, GAIN1,
REG_EN = 0 V

SPKR_EN = 0 V, HP_EN = REG_EN = 0 V 5 12 mA

SPKR_EN = HP_EN = 2 V, REG_EN = 0 V 7.5 14 mA

SPKR_EN = REG_EN = 2 V, HP_EN = 0 V 0.65 1 mA

TPA6040A4

SLOS519A – APRIL 2007 – REVISED APRIL 2007

MIN MAX UNIT

SPEAKER AMPLIFIER DC CHARACTERISTICS

TA= 25 ° C, VDD = SPVDD = 5 V, RL= 4 k Ω , Gain = 6 dB (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

| V

| Output offset voltage (measured differentially) Inputs AC-coupled to GND, Gain = 6 dB 0.5 10 mV

OO

PSRR Power supply rejection ratio VDD = SPVDD = 4.5 V to 5.5 V -60 -74 dB

SPEAKER AMPLIFIER AC CHARACTERISTICS

TA= 25 ° C, VDD = SPVDD = 5 V, RL= 4 Ω , Gain = 6 dB (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

THD+N = 1%, f = 1 kHz, RL= 8 Ω 1.25

P

O

Output power

THD+N Total harmonic distortion plus noise

kSVR Supply ripple rejection ratio -60 dB

SNR Signal-to-noise rejection ratio 90 dB

Crosstalk (Left-Right; Right-Left)

Vn Noise output voltage 30 µ Vrms
Z

I

Input Impedance Gain = 21.6 dB 15 20 k Ω

G Gain dB

Gain Matching Channel-to Channel 0.01 dB
Start-up time from shutdown CBYPASS = 0.47 µ F 30 ms

THD+N = 10%, f = 1 kHz, RL= 8 Ω 1.5
THD+N = 1%, f = 1 kHz, RL= 4 Ω 2 W
THD+N = 10%, f = 1 kHz, RL= 4 Ω 2.3
PO= 1 W, RL= 8 Ω , f = 20 Hz to 20 kHz 0.1%
PO= 0.5 W, RL= 8 Ω , f = 20 Hz to 20 kHz 0.08%
f = 1 kHz, CBYPASS = 0.47 µ F,

V

= 200 mVp-p

RIPPLE

Maximum output at THD+N <1%, f = 1 kHz,
Gain = 6 dB

f = 1 kHz, Po= 1 W, Gain = 6 dB -80 dB
f = 10 kHz, Po= 1 W, Gain = 6 dB -75 dB
CBYPASS = 0.47 µ F, f = 20 Hz to 20 kHz,

Gain = 6 dB, No weighting

GAIN0, GAIN1 = 0.8 V 5.4 6 6.6
GAIN0 = 0.8 V; GAIN1 = 2 V 9.4 10 10.6
GAIN0 = 2 V, GAIN1 = 0.8 V 15 15.6 16.2
GAIN0, GAIN1 = 2 V 21 21.6 22.2

Submit Documentation Feedback

5

www.ti.com

TPA6040A4

SLOS519A – APRIL 2007 – REVISED APRIL 2007

HEADPHONE AMPLIFIER DC ELECTRICAL CHARACTERISTICS

TA= 25 ° C, HPVDD = CPVDD = VDD = 5 V, RL= 16 Ω (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

| V

| Output offset voltage Inputs grounded 1 3 mV

OS

PSRR Power supply rejection ratio HPVDD = 4.5 V to 5.5 V -75 -100 dB

HEADPHONE AMPLIFIER AC CHARACTERISTICS

TA= 25 ° C, HPVDD = 5 V, RL= 16 Ω (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

P

O

Output power (outputs in phase) mW

THD+N Total harmonic distortion plus noise

Dynamic Range with Signal Present A-Weighted, f = 20 Hz to 20 kHz -100 dB FS

kSVR Supply ripple rejection ratio f = 1 kHz, 200-mVpp ripple -60 dB

Crosstalk Po= 35 mW, f = 20 Hz to 20 kHz -80 dB
SNR Signal-to-noise ratio Maximum output at THD+N 1%, f = 1 kHz 95 dB
V

n

Z

I

Noise output voltage f = 20 Hz to 20 kHz, No weighting 20 µ Vrms

Input Impedance 15 20 k Ω
Gain Closed-loop voltage gain RL= 16 Ω -1.45 -1.5 -1.55 V/V

Start-up time from shutdown 5 ms

THD+N = 10%, Rl = 16 Ω , f = 1 kHz 200
THD+N = 10%, Rl = 32 Ω , f = 1 kHz 100
PO= 85 mW, f = 20 Hz to 20 kHz,

RL= 16 Ω
PO= 50 mW, f = 20 Hz to20 kHz,

RL= 32 Ω

0.03%

0.04%

LDO CHARACTERISTICS

TA= 25 ° C, VDD = 5 V (unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

V

Input voltage V

I

I

Continuous output current 120 mA

O

V

Output voltage 0 < IO< 120 mA; 4.9 V < Vin < 5.5 V 4.65 4.75 4.85 V

O

Dropout voltage IO= 120 mA 60 100 mV
Line regulation IL= 5 mA; 4.9 V < Vin < 5.5 V 3 12 mV
Load regulation IL= 0 – 120 mA, Vin = 5 V 0.13 0.23 mV/ mA
Power supply ripple rejection V

DD

= 4.9V, IL= 10 mA f = 100 Hz 46 dB

DD

4.5 5.5 V

6

Submit Documentation Feedback

www.ti.com

TYPICAL CHARACTERISTICS

f − Frequency − Hz

20 100 1k 10k

THD+N − Total Harmonic Distortion + Noise − %

0.005

0.1

1

20k

Gain = 6 dB
RL = 4 Ω
VCC = 5 V

G001

0.01
PO = 1.5 W

PO = 1 W

PO = 0.25 W

f − Frequency − Hz

20 100 1k 10k

THD+N − Total Harmonic Distortion + Noise − %

0.005

0.1

1

20k

Gain = 6 dB
RL = 8 Ω
VCC = 5 V

G002

0.01

PO = 1 W

PO = 0.25 W

PO = 0.1 W

f − Frequency − Hz

10 100 1k 10k

THD+N − Total Harmonic Distortion + Noise − %

0.001

0.01

1

100k

G003

0.1

PO = 100 mW

Gain = 3.5 dB
RL = 16 Ω
VCC = 5 V

PO = 50 mW

PO = 2.8 mW

f − Frequency − Hz

10 100 1k 10k

THD+N − Total Harmonic Distortion + Noise − %

0.001

0.01

1

100k

G004

0.1

Gain = 3.5 dB
RL = 32 Ω
VCC = 5 V

PO = 1.4 mW

PO = 50 mW

PO = 25 mW

Default graph conditions: Vcc = 5 V, Freq = 1 kHz, AES17 Filter.

TPA6040A4

SLOS519A – APRIL 2007 – REVISED APRIL 2007

TOTAL HARMONIC DISTORTION + NOISE (SP) TOTAL HARMONIC DISTORTION + NOISE (SP)

vs vs

FREQUENCY FREQUENCY

Figure 1. Figure 2.

TOTAL HARMONIC DISTORTION + NOISE (HP) TOTAL HARMONIC DISTORTION + NOISE (HP)

vs vs

FREQUENCY FREQUENCY

Figure 3. Figure 4.

Submit Documentation Feedback

7

www.ti.com

PO − Output Power − W

10m 100m 1

THD+N − Total Harmonic Distortion + Noise − %

0.01

0.1

20

4

Gain = 6 dB
RL = 4 Ω

G005

1

10

VCC = 4.5 V

VCC = 5 V

VCC = 5.5 V

PO − Output Power − W

10m 100m 1

THD+N − Total Harmonic Distortion + Noise − %

0.01

0.1

20

4

Gain = 6 dB
RL = 8 Ω

G006

1

10

VCC = 4.5 V

VCC = 5 V

VCC = 5.5 V

PO − Output Power − W

100µ 1m 100m

THD+N − Total Harmonic Distortion + Noise − %

0.001

0.01

10

1

Gain = 3.5 dB
RL = 16 Ω
VCC = 5 V

G007

0.1

1

10m

In Phase

VCC = 5 V

PO − Output Power − W

100µ 1m 100m

THD+N − Total Harmonic Distortion + Noise − %

0.001

0.01

10

1

Gain = 3.5 dB
RL = 32 Ω
VCC = 5 V

G008

0.1

1

10m

VCC = 5 V

In Phase

TPA6040A4

SLOS519A – APRIL 2007 – REVISED APRIL 2007

TYPICAL CHARACTERISTICS (continued)

TOTAL HARMONIC DISTORTION + NOISE (SP) TOTAL HARMONIC DISTORTION + NOISE (SP)

vs vs

OUTPUT POWER OUTPUT POWER

Figure 5. Figure 6.

TOTAL HARMONIC DISTORTION + NOISE (HP) TOTAL HARMONIC DISTORTION + NOISE (HP)

vs vs

OUTPUT POWER OUTPUT POWER

8

Figure 7. Figure 8.

Submit Documentation Feedback

www.ti.com

−140

−130

−120

−110

−100

−90

−80

−70

−60

−50

−40

−30

−20

−10

0

f − Frequency − Hz

Gain = 6 dB
PO = 1 W
RL = 4 Ω
VCC = 5 V

Crosstalk − dB

10 100 1k 100k10k

G009

L to R

R to L

−140

−130

−120

−110

−100

−90

−80

−70

−60

−50

−40

−30

−20

−10

0

f − Frequency − Hz

Gain = 6 dB
PO = 1 W
RL = 8 Ω
VCC = 5 V

Crosstalk − dB

10 100 1k 100k10k

G010

L to R

R to L

−140

−130

−120

−110

−100

−90

−80

−70

−60

−50

−40

−30

−20

−10

0

f − Frequency − Hz

Gain = 6 dB
PO = 2 W
RL = 4 Ω
VCC = 5 V

Crosstalk − dB

10 100 1k 100k10k

G011

Left SPKR to LDO

Right SPKR to LDO

−120

−110

−100

−90

−80

−70

−60

−50

−40

−30

−20

−10

0

f − Frequency − Hz

Gain = 3.5 dB
PO = 35 mW
RL = 16 Ω
VCC = 5 V

Crosstalk − dB

10 100 1k 100k10k

G012

L to R

R to L

SLOS519A – APRIL 2007 – REVISED APRIL 2007

TYPICAL CHARACTERISTICS (continued)

CROSSTALK (SP) CROSSTALK (SP)

vs vs

FREQUENCY FREQUENCY

TPA6040A4

Figure 9. Figure 10.

CROSSTALK (LDO) CROSSTALK (HP)

vs vs

FREQUENCY FREQUENCY

Figure 11. Figure 12.

Submit Documentation Feedback

9