Texas Instruments TPA701MSOPEVM, TPA701DR, TPA701EVM, TPA701DGNR, TPA701DGN Datasheet

TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER

SLOS229B ± NOVEMBER1998 ± REVISED MARCH 2000

D Fully Specified for 3.3-V and 5-V Operation	D OR DGN PACKAGE
D Wide Power Supply Compatibility				(TOP VIEW)
2.5 V ± 5.5 V	SHUTDOWN			1	8				VO±
D Output Power for RL = 8 Ω
	BYPASS			2	7				GND
± 700 mW at VDD = 5 V, BTL	IN+			3	6				VDD
± 250 mW at VDD = 3.3 V, BTL	IN±			4	5				VO+
D Ultra-Low Quiescent Current in Shutdown
Mode . . . 1.5 nA

D D

Thermal and Short-Circuit Protection

Surface-Mount Packaging

±SOIC

±PowerPAD MSOP

description

The TPA701 is a bridge-tied load (BTL) audio power amplifier developed especially for low-voltage applications where internal speakers are required. Operating with a 3.3-V supply, the TPA701 can deliver 250-mW of continuous power into a BTL 8-Ω load at less than 0.6% THD+N throughout voice band frequencies. Although this device is characterized out to 20 kHz, its operation was optimized for narrower band applications such as wireless communications. The BTL configuration eliminates the need for external coupling capacitors on the output in most applications, which is particularly important for small battery-powered equipment. This device features a shutdown mode for power-sensitive applications with a supply current of 1.5 nA during shutdown. The TPA701 is available in an 8-pin SOIC surface-mount package and the surface-mount PowerPAD MSOP, which reduces board space by 50% and height by 40%.

RF				VDD	6	VDD
Audio			VDD/2			CS
Input
RI	4	IN ±	±	VO+	5
CI	3	IN+	+
	2	BYPASS
CB
			±	VO±	8	700 mW
			+		7
				GND
From System Control	1	SHUTDOWN	Bias
			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.

PowerPAD is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

Copyright 2000, Texas Instruments Incorporated

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1

TPA701

700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER

SLOS229B ± NOVEMBER1998 ± REVISED MARCH 2000

AVAILABLE OPTIONS

		PACKAGED DEVICES		MSOP
	TA	SMALL OUTLINE²	MSOP³
				SYMBOLIZATION
		(D)	(DGN)
	± 40°C to 85°C	TPA701D	TPA701DGN	ABA

² In the SOIC package, the maximum RMS output power is thermally limited to 350 mW; 700 mW peaks can be driven, as long as the RMS value is less than 350 mW.

³The D and DGN packages are available taped and reeled. To order a taped and reeled part, add the suffix R to the part number (e.g., TPA701DR).

				Terminal Functions
	TERMINAL		I/O	DESCRIPTION
	NAME	NO.
	BYPASS	2	I	BYPASS is the tap to the voltage divider for internal mid-supply bias. This terminal should be connected to
				a 0.1- F to 2.2- F capacitor when used as an audio amplifier.
	GND	7		GND is the ground connection.
	IN ±	4	I	IN ± is the inverting input. IN ± is typically used as the audio input terminal.
	IN+	3	I	IN + is the noninverting input. IN + is typically tied to the BYPASS terminal.
	SHUTDOWN	1	I	SHUTDOWN places the entire device in shutdown mode when held high (IDD = 1.5 nA).
	VDD	6		VDD is the supply voltage terminal.
	VO+	5	O	VO+ is the positive BTL output.
	VO±	8	O	VO± is the negative BTL output.

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)§

Supply voltage, VDD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . 6	V
Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . .	±0.3 V to VDD +0.3	V
Continuous total power dissipation . . . . . . . . . . . . . . . . . . . . .	internally limited (see Dissipation Rating Table)
Operating free-air temperature range, TA . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . .	. . . . . ±40°C to 85°C
Operating junction temperature range, TJ . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . .	. . . . ±40°C to 150°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . .	. . . . ±65°C to 150°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . .		. . . . . . . . . . . . 260°C

§Stresses beyond those listed under ªabsolute maximum ratingsº may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under ªrecommended operating conditionsº is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

DISSIPATION RATING TABLE

PACKAGE	TA ≤ 25°C	DERATING FACTOR	TA = 70°C	TA = 85°C
D	725 mW	5.8 mW/°C	464 mW	377 mW
DGN	2.14 W¶	17.1 mW/°C	1.37 W	1.11 W

¶Please see the Texas Instruments document, PowerPAD Thermally Enhanced Package Application Report

(literature number SLMA002), for more information on the PowerPAD package. The thermal data was measured on a PCB layout based on the information in the section entitled Texas Instruments Recommended Board for PowerPAD on page 33 of the before mentioned document.

recommended operating conditions

	MIN		MAX	UNIT
Supply voltage, VDD	2.5		5.5	V
Operating free-air temperature, TA	± 40		85	°C

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TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER

SLOS229B ± NOVEMBER1998 ± REVISED MARCH 2000

electrical characteristics at specified free-air temperature, VDD = 3.3 V, TA = 25°C (unless otherwise noted)

		PARAMETER	TEST CONDITIONS	MIN TYP		MAX		UNIT
VOO		Output offset voltage (measured differentially)	See Note 1			20		mV
PSRR		Power supply rejection ratio	VDD = 3.2 V to 3.4 V		85			dB
IDD		Supply current	BTL mode		1.25	2.5		mA
IDD(SD)		Supply current, shutdown mode (see Figure 4)	See Note 2		1.5	1000		nA
NOTES: 1.		At 3 V < VDD < 5 V the dc output voltage is approximately VDD/2.
	2.	This parameter is measured with no external capacitors connected to the device.

operating characteristics, VDD = 3.3 V, TA = 25°C, RL = 8 Ω

	PARAMETER		TEST CONDITIONS		MIN TYP		MAX	UNIT
PO	Output power, see Note 3	THD = 0.2%,	See Figure 9			250		mW
THD + N	Total harmonic distortion plus noise	PO = 250 mW,	f = 200 Hz to 4 kHz,	See Figure 7		0.55%
BOM	Maximum output power bandwidth	Gain = 2,	THD = 2%,	See Figure 7		20		kHz
B1	Unity-gain bandwidth	Open Loop,	See Figure 15			1.4		MHz
	Supply ripple rejection ratio	f = 1 kHz,	CB = 1 F,	See Figure 2		79		dB
Vn	Noise output voltage	Gain = 1,	CB = 0.1 F,	See Figure 19		17		V(rms)

NOTE 3: Output power is measured at the output terminals of the device at f = 1 kHz.

electrical characteristics at specified free-air temperature, VDD = 5 V, TA = 25°C (unless otherwise noted)

	PARAMETER	TEST CONDITIONS	MIN TYP		MAX		UNIT
VOO	Output offset voltage (measured differentially)				20		mV
PSRR	Power supply rejection ratio	VDD = 4.9 V to 5.1 V		78			dB
IDD	Supply current			1.25	2.5		mA
IDD(SD)	Supply current, shutdown mode (see Figure 4)			5	1500		nA

operating characteristics, VDD = 5 V, TA = 25°C, RL = 8 Ω

	PARAMETER		TEST CONDITIONS		MIN TYP			MAX	UNIT
PO	Output power	THD = 0.5%,	See Figure 13				700²		mW
THD + N	Total harmonic distortion plus noise	PO = 250 mW,	f = 200 Hz to 4 kHz,	See Figure 11			0.5%
BOM	Maximum output power bandwidth	Gain = 2,	THD = 2%,	See Figure 11			20		kHz
B1	Unity-gain bandwidth	Open Loop,	See Figure 16				1.4		MHz
	Supply ripple rejection ratio	f = 1 kHz,	CB = 1 F,	See Figure 2			80		dB
Vn	Noise output voltage	Gain = 1,	CB = 0.1 F,	See Figure 20			17		V(rms)

²The DGN package, properly mounted, can conduct 700 mW RMS power continuously. The D package, can only conduct 350 mW RMS power continuously, with peaks to 700 mW.

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TPA701

700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER

SLOS229B ± NOVEMBER1998 ± REVISED MARCH 2000

PARAMETER MEASUREMENT INFORMATION

					VDD	6
	RF					VDD
Audio			V	/2		CS
			DD
Input
RI	4	IN ±		±	VO+	5
CI	3	IN+		+
	2	BYPASS				RL = 8 Ω
CB
				±	VO±	8
				+		7
					GND
	1	SHUTDOWN	Bias
			Control

Figure 1. BTL Mode Test Circuit

TYPICAL CHARACTERISTICS

Table of Graphs

				FIGURE
		Supply ripple rejection ratio	vs Frequency	2
	IDD	Supply current	vs Supply voltage	3,	4
	PO	Output power	vs Supply voltage	5
			vs Load resistance	6
	THD + N	Total harmonic distortion plus noise	vs Frequency	7, 8, 11, 12
			vs Output power	9, 10, 13, 14
		Open loop gain and phase	vs Frequency	15,	16
		Closed loop gain and phase	vs Frequency	17,	18
	Vn	Output noise voltage	vs Frequency	19,	20
	PD	Power dissipation	vs Output power	21,	22

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TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER

SLOS229B ± NOVEMBER1998 ± REVISED MARCH 2000

TYPICAL CHARACTERISTICS

SUPPLY RIPPLE REJECTION RATIO

SUPPLY CURRENT

vs

vs

FREQUENCY

SUPPLY VOLTAGE

0

RL = 8 Ω

1.8

±10

BTL

± dB

CB = 1 µF

±20

BTL

1.6

Ripple Rejection Ratio

±30

SupplyCurrent ± mA

±40

1.4

±50

1.2

±60

±70

1

Supply

±

±80

VDD = 3.3 V

DD

I

±90

VDD = 5 V

0.8

±100

10k

20k

0.6

20

100

1k

3

4

5

2.5

3.5

4.5

5.5

f ± Frequency ± Hz

VDD ± Supply Voltage ± V

Figure 2

Figure 3

SUPPLY CURRENT vs

SUPPLY VOLTAGE

10

SHUTDOWN = High

	9
	8
nA	7
±
Current	6
	5
± Supply
	4
	3
DD
I	2
	1
	0	3		4		5
	2.5		3.5		4.5		5.5
			VDD ± Supply Voltage ± V

Figure 4

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5

TPA701

700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER

SLOS229B ± NOVEMBER1998 ± REVISED MARCH 2000

TYPICAL CHARACTERISTICS

OUTPUT POWER vs

SUPPLY VOLTAGE

	1000
		THD+N 1%
		f = 1 kHz
	800	BTL
± mW
Power	600		RL = 8 Ω
Output	400				RL = 32 Ω
±
O
P
	200
	0
	2.5	3	3.5	4	4.5	5	5.5
			VDD ± Supply Voltage ± V

Figure 5

OUTPUT POWER vs

LOAD RESISTANCE

	800
						THD+N = 1%
	700					f = 1 kHz
						BTL
mW	600
			VDD = 5 V
±
Power	500
	400
± Output
	300	VDD = 3.3 V
O
P	200
	100
	0
	8	16	24	32	40	48	56	64
			RL ± Load Resistance ± Ω

Figure 6

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TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER

SLOS229B ± NOVEMBER1998 ± REVISED MARCH 2000

TYPICAL CHARACTERISTICS

TOTAL HARMONIC DISTORTION PLUS NOISE

TOTAL HARMONIC DISTORTION PLUS NOISE

vs

vs

FREQUENCY

FREQUENCY

%

10

VDD = 3.3 V

%

10

V

= 3.3 V

±

PO = 250 mW

±

DD

RL = 8 Ω

Noise+

Noise+

RL = 8 Ω

AV = ±20 V/V

A

= ±2 V/V

BTL

V

Distortion

Distortion

BTL

1

AV =± 10 V/V

1

PO = 50 mW

Harmonic

0.1

AV = ±2 V/V

Harmonic

0.1

±TotalTHD+N

±TotalTHD+N

PO = 250 mW

PO = 125 mW

0.01

0.01

20

100

1k

10k

20k

20

100

1k

10k

20k

f ± Frequency ± Hz

f ± Frequency ± Hz

Figure 7	Figure 8
TOTAL HARMONIC DISTORTION PLUS NOISE	TOTAL HARMONIC DISTORTION PLUS NOISE

vs

vs

OUTPUT POWER

OUTPUT POWER

%

10

VDD = 3.3 V

%

10

±

f = 1 kHz

±

Noise

Noise

BTL

AV = ±2 V/V

+

+

f = 20 kHz

Distortion

1

Distortion

1

f = 10 kHz

Harmonic

0.1

RL = 8 Ω

Harmonic

0.1

f = 1 kHz

±Total

±Total

f = 20 Hz

VDD = 3.3 V

RL = 8 Ω

THD+N

THD+N

CB = 1 µF

AV = ±2 V/V

BTL

0.01

0.01

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.01

0.1

1

PO ± Output Power ± W

PO ± Output Power ± W

Figure 9

Figure 10

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