Datasheet

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TPA701

700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER

SLOS229D – NOVEMBER1998 – REVISED MAY 2003

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

D Fully Specified for 3.3-V and 5-V Operation

D Wide Power Supply Compatibility

2.5 V – 5.5 V

D Output Power for R

= 8 Ω

– 700 mW at V

= 5 V, BTL

– 250 mW at V

= 3.3 V, BTL

D Ultralow Quiescent Current in Shutdown

Mode . . . 1.5 nA

D Thermal and Short-Circuit Protection

D 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%.

Audio

Input

Bias

Control

700 mW

BYPASS

IN –

SHUTDOWN

–8

GND

From System Control

3 IN+

–

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.

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.

SHUTDOWN

BYPASS

IN+

IN–

–

GND

D OR DGN PACKAGE

(TOP VIEW)

PowerPAD is a trademark of Texas Instruments.

Summary of content (29 pages)

PAGE 1
TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER SLOS229D – NOVEMBER1998 – REVISED MAY 2003 D Fully Specified for 3.3-V and 5-V Operation D Wide Power Supply Compatibility D OR DGN PACKAGE (TOP VIEW) 2.5 V – 5.5 V Output Power for RL = 8 Ω – 700 mW at VDD = 5 V, BTL – 250 mW at VDD = 3.3 V, BTL Ultralow Quiescent Current in Shutdown Mode . . . 1.
PAGE 2
TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER SLOS229D – NOVEMBER1998 – REVISED MAY 2003 AVAILABLE OPTIONS PACKAGED DEVICES TA SMALL OUTLINE† (D) MSOP SYMBOLIZATION MSOP‡ (DGN) – 40°C to 85°C TPA701D TPA701DGN ABA † 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. ‡ The D and DGN packages are available taped and reeled.
PAGE 3
TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER SLOS229D – NOVEMBER1998 – REVISED MAY 2003 recommended operating conditions ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Supply voltage, VDD High-level voltage, VIH SHUTDOWN Low-level voltage, VIL SHUTDOWN MIN MAX 2.5 5.5 0.
PAGE 4
TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER SLOS229D – NOVEMBER1998 – REVISED MAY 2003 operating characteristics, VDD = 5 V, TA = 25°C, RL = 8 Ω ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁ PARAMETER TEST CONDITIONS MIN PO O
PAGE 5
TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER SLOS229D – NOVEMBER1998 – REVISED MAY 2003 TYPICAL CHARACTERISTICS Table of Graphs FIGURE IDD Supply ripple rejection ratio vs Frequency Supply current vs Supply voltage 3, 4 vs Supply voltage 5 vs Load resistance 6 PO Output power THD + N Total harmonic distortion plus noise 2 vs Frequency Vn PD 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
PAGE 6
TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER SLOS229D – NOVEMBER1998 – REVISED MAY 2003 TYPICAL CHARACTERISTICS OUTPUT POWER vs SUPPLY VOLTAGE SUPPLY CURRENT vs SUPPLY VOLTAGE 1000 10 9 THD+N 1% f = 1 kHz BTL SHUTDOWN = VDD RF = 10 kΩ 800 PO – Output Power – mW I DD – Supply Current – nA 8 7 6 5 4 3 600 RL = 8 Ω RL = 32 Ω 400 200 2 1 0 2.5 3 4 3.5 5 4.5 0 2.5 5.5 3 3.
PAGE 7
TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER SLOS229D – NOVEMBER1998 – REVISED MAY 2003 TYPICAL CHARACTERISTICS TOTAL HARMONIC DISTORTION PLUS NOISE vs FREQUENCY TOTAL HARMONIC DISTORTION PLUS NOISE vs FREQUENCY 10 THD+N –Total Harmonic Distortion + Noise – % THD+N –Total Harmonic Distortion + Noise – % 10 VDD = 3.3 V PO = 250 mW RL = 8 Ω BTL AV = –20 V/V 1 AV =– 10 V/V AV = –2 V/V 0.1 0.01 20 100 1k 10k VDD = 3.3 V RL = 8 Ω AV = –2 V/V BTL PO = 50 mW 1 0.1 PO = 125 mW PO = 250 mW 0.
PAGE 8
TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER SLOS229D – NOVEMBER1998 – REVISED MAY 2003 TYPICAL CHARACTERISTICS TOTAL HARMONIC DISTORTION PLUS NOISE vs FREQUENCY TOTAL HARMONIC DISTORTION PLUS NOISE vs FREQUENCY 10 VDD = 5 V PO = 700 mW RL = 8 Ω BTL THD+N –Total Harmonic Distortion + Noise – % THD+N –Total Harmonic Distortion + Noise – % 10 AV = –20 V/V 1 AV = –10 V/V AV = –2 V/V 0.1 0.01 20 100 1k 10k 20k VDD = 5 V RL = 8 Ω AV = –2 V/V BTL 1 PO = 700 mW 0.1 PO = 350 mW 0.
PAGE 9
TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER SLOS229D – NOVEMBER1998 – REVISED MAY 2003 TYPICAL CHARACTERISTICS OPEN-LOOP GAIN AND PHASE vs FREQUENCY 80 180° VDD = 3.
PAGE 10
TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER SLOS229D – NOVEMBER1998 – REVISED MAY 2003 TYPICAL CHARACTERISTICS CLOSED-LOOP GAIN AND PHASE vs FREQUENCY 1 180° Phase 0.75 170° 0.25 0 160° Gain –0.25 150° –0.5 –0.75 140° –1 –1.25 –1.5 Phase Closed-Loop Gain – dB 0.5 VDD = 3.3 V RL = 8 Ω PO = 250 mW BTL 130° –1.75 –2 101 102 103 104 105 106 120° f – Frequency – Hz Figure 17 CLOSED-LOOP GAIN AND PHASE vs FREQUENCY 1 180° Phase 0.75 170° 0.25 0 160° Gain –0.25 150° –0.
PAGE 11
TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER SLOS229D – NOVEMBER1998 – REVISED MAY 2003 TYPICAL CHARACTERISTICS OUTPUT NOISE VOLTAGE vs FREQUENCY 100 VDD = 3.3 V BW = 22 Hz to 22 kHz RL = 8 Ω or 32 Ω AV = –1 V/V Vn – Output Noise Voltage – µV Vn – Output Noise Voltage – µV 100 OUTPUT NOISE VOLTAGE vs FREQUENCY VO BTL Vo+ 10 1 20 100 1k 10k VDD = 5 V BW = 22 Hz to 22 kHz RL = 8 Ω or 32 Ω AV = –1 V/V VO BTL Vo+ 10 1 20 20k 100 f – Frequency – Hz Figure 19 800 BTL Mode VDD = 3.
PAGE 12
TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER SLOS229D – NOVEMBER1998 – REVISED MAY 2003 APPLICATION INFORMATION bridged-tied load Figure 23 shows a linear audio power amplifier (APA) in a BTL configuration. The TPA701 BTL amplifier consists of two linear amplifiers driving both ends of the load. There are several potential benefits to this differential drive configuration but initially consider power to the load.
PAGE 13
TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER SLOS229D – NOVEMBER1998 – REVISED MAY 2003 APPLICATION INFORMATION bridged-tied load (continued) For example, a 68-µF capacitor with an 8-Ω speaker would attenuate low frequencies below 293 Hz. The BTL configuration cancels the dc offsets, which eliminates the need for the blocking capacitors. Low-frequency performance is then limited only by the input network and speaker response.
PAGE 14
TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER SLOS229D – NOVEMBER1998 – REVISED MAY 2003 APPLICATION INFORMATION BTL amplifier efficiency (continued) 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.
PAGE 15
TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER SLOS229D – NOVEMBER1998 – REVISED MAY 2003 APPLICATION INFORMATION application schematic Figure 26 is a schematic diagram of a typical handheld audio application circuit, configured for a gain of –10 V/V. VDD 6 RF 50 kΩ Audio Input VDD/2 RI 10 kΩ CI 4 IN – 3 IN+ 2 BYPASS VDD CS 1 µF – VO+ 5 + CB 2.2 µF – VO– 8 + 700 mW 7 GND SHUTDOWN 1 From System Control Bias Control Figure 26.
PAGE 16
TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER SLOS229D – NOVEMBER1998 – REVISED MAY 2003 APPLICATION INFORMATION component selection (continued) As an example consider an input resistance of 10 kΩ and a feedback resistor of 50 kΩ. The BTL gain of the amplifier would be –10 V/V and the effective impedance at the inverting terminal would be 8.3 kΩ, which is well within the recommended range.
PAGE 17
TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER SLOS229D – NOVEMBER1998 – REVISED MAY 2003 APPLICATION INFORMATION component selection (continued) In this example, CI is 0.40 µF, so one would likely choose a value in the range of 0.47 µF to 1 µF. A further consideration for this capacitor is the leakage path from the input source through the input network (RI, CI) and the feedback resistor (RF) to the load.
PAGE 18
TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER SLOS229D – NOVEMBER1998 – REVISED MAY 2003 APPLICATION INFORMATION 5-V versus 3.3-V operation The TPA701 operates over a supply range of 2.5 V to 5.5 V. This data sheet provides full specifications for 5-V and 3.3-V operation, as these are considered to be the two most common standard voltages. There are no special considerations for 3.3-V versus 5-V operation with respect to supply bypassing, gain setting, or stability.
PAGE 19
TPA701 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER SLOS229D – NOVEMBER1998 – REVISED MAY 2003 APPLICATION INFORMATION headroom and thermal considerations (continued) This is valuable information to consider when attempting to estimate the heat dissipation requirements for the amplifier system. Comparing the absolute worst case, which is 700 mW of continuous power output with 0 dB of headroom, against 12 dB and 15 dB applications drastically affects maximum ambient temperature ratings for the system.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com (4) 24-Jan-2013 Only one of markings shown within the brackets will appear on the physical device. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information.
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PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant TPA701DGNR MSOPPower PAD DGN 8 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1 TPA701DR SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.
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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) TPA701DGNR MSOP-PowerPAD DGN 8 2500 358.0 335.0 35.0 TPA701DR SOIC D 8 2500 367.0 367.0 35.
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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.