tpa751

TPA751 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER WITH DIFFERENTIAL INPUTS SLOS336C – DECEMBER 2000 – REVISED OCTOBER 2002 1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 � Fully Specified for 3.3-V and 5-V Operation � Wide Power Supply Compatibility 2.5 V – 5.5 V � Power Supply Rejection at 217 Hz – 84 dB at VDD = 5 V – 81 dB at VDD = 3.3 V � Output Power for RL = 8 Ω – 700 mW at VDD = 5 V – 250 mW at VDD = 3.3 V � Ultralow Supply Current in Shutdown Mode . . . 1.5 nA � Thermal and Short-Circuit Protection � Surface-Mount Packaging – SOIC – PowerPAD MSOP – MicroStar Junior (BGA) description The TPA751 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 TPA751 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 is 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 TPA751 is available in a 3.0 × 3.0 mm MicroStar Junior (BGA), 8-pin SOIC surface-mount package and a surface-mount PowerPAD MSOP. Audio Input Bias Control VDD 700 mW 6 5 7 VO+ VDD 1 2 4 BYPASS IN – VDD/2 CI RI CS CB RF SHUTDOWN VO– 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. Copyright  2002, Texas Instruments IncorporatedPRODUCTION 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. 1 2 3 4 8 7 6 5 SHUTDOWN BYPASS IN+ IN– VO– GND VDD VO+ D OR DGN PACKAGE (TOP VIEW) (SIDE VIEW) MicroStar Junior� (GQS) Package (TOP VIEW) SHUTDOWN VO– BYPASS IN+ IN– GND VDD VO+ NOTE: The shaded terminals are used for thermal connections to the ground plane. (E2) (E3) (E4) (E5) (A2) (A3) (A4) (A5) PowerPAD and MicroStar Junior are trademarks of Texas Instruments. TPA751 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER WITH DIFFERENTIAL INPUTS SLOS336C – DECEMBER 2000 – REVISED OCTOBER 2002 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 AVAILABLE OPTIONS PACKAGED DEVICES MicroStar-Junior (BGA)‡ (GQS) SMALL OUTLINE† (D) MSOP‡ (DGN) Device TPA751GQS TPA751D TPA751DGN Package symbolization TPA751 TPA751 ATC † 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, DGN, and GQS packages are available taped and reeled. To order a taped and reeled part, add the suffix R to the part number (e.g., TPA751DR). Terminal Functions TERMINAL NAME NO. I/O DESCRIPTION NAME GQS D, DGN I/O DESCRIPTION BYPASS E3 2 I BYPASS is the tap to the voltage divider for internal mid-supply bias. This terminal should be connected to a 0.1-µF to 2.2-µF capacitor when used as an audio amplifier. GND § 7 GND is the ground connection. IN– E5 4 I IN– is the inverting input. IN– is typically used as the audio input terminal. IN+ E4 3 I IN+ is the noninverting input. IN+ is typically tied to the BYPASS terminal for SE input. SHUTDOWN E2 1 I SHUTDOWN places the entire device in shutdown mode when held low (IDD = 1.5 nA). VDD A4 6 VDD is the supply voltage terminal. VO+ A5 5 O VO+ is the positive BTL output. VO– A2 8 O VO– is the negative BTL output. § A1, A3, A5, B1–B5, C1–C5, D1–D5 are electrical and thermal connections to the ground plane. 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 “absolute maximum ratings” 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 “recommended operating conditions” 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 GQS|| 1.66 W|| 13.3 mW/°C 1.06 W 866 mW 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 # See the Texas Instruments document, PowerPAD Thermally Enhanced Package Application Report (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 that document.|| See the Texas Instruments document, MicroStar Junior Made Easy Application Brief (SSYA009A) for board layout information on the MicroStar Junior package. TPA751 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER WITH DIFFERENTIAL INPUTS SLOS336C – DECEMBER 2000 – REVISED OCTOBER 2002 3POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 recommended operating conditions MIN MAX UNIT ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Supply voltage, VDD ÁÁÁ ÁÁÁ 2.5 ÁÁÁÁ ÁÁÁÁ 5.5 ÁÁÁ ÁÁÁ V ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ High-level input voltage, VIH, (SHUTDOWN) ÁÁÁ ÁÁÁ 0.9VDD ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ V ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Low-level input voltage, VIL, (SHUTDOWN) ÁÁÁ ÁÁÁ ÁÁÁÁ ÁÁÁÁ 0.1VDDÁÁÁ ÁÁÁ V ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Operating free-air temperature, TA ÁÁÁ ÁÁÁ –40ÁÁÁÁ ÁÁÁÁ 85ÁÁÁ ÁÁÁ °C electrical characteristics at specified free-air temperature, VDD = 3.3 V, TA = 25°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ÁÁÁÁ ÁÁÁÁ |VOS| ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ Output offset voltage (measured differentially) ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ SHUTDOWN = VDD, RL = 8 Ω, RF = 10 kΩ ÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ 20 ÁÁÁ ÁÁÁ mV ÁÁÁÁ ÁÁÁÁ PSRR ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ Power supply rejection ratio ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ VDD = 3.2 V to 3.4 V ÁÁ ÁÁ ÁÁÁ ÁÁÁ 85ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ dB ÁÁÁÁ ÁÁÁÁ IDD ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ Supply current ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ SHUTDOWN = VDD, RF = 10 kΩ ÁÁ ÁÁ ÁÁÁ ÁÁÁ 1.25ÁÁÁ ÁÁÁ 2.5ÁÁÁ ÁÁÁ mA ÁÁÁÁ ÁÁÁÁ IDD(SD) ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ Supply current, shutdown mode (see Figure 4) ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ SHUTDOWN = 0 V, RF = 10 kΩ ÁÁ ÁÁ ÁÁÁ ÁÁÁ 1.5ÁÁÁ ÁÁÁ 1000ÁÁÁ ÁÁÁ nA ÁÁÁÁ ÁÁÁÁ |IIH| ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ SHUTDOWN, VDD = 3.3 V, Vi = VDD ÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ 1 ÁÁÁ ÁÁÁ µA ÁÁÁÁ ÁÁÁÁ |IIL| ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ SHUTDOWN, VDD = 3.3 V, Vi = 0 V ÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ 1 ÁÁÁ ÁÁÁ µA operating characteristics, VDD = 3.3 V, TA = 25°C, RL = 8 Ω PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ÁÁÁÁ ÁÁÁÁ PO ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Output power, See Note 1 ÁÁÁÁÁ ÁÁÁÁÁ THD = 0.2%, ÁÁÁÁÁÁ ÁÁÁÁÁÁ See Figure 9 ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ 250 ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ mW ÁÁÁÁ ÁÁÁÁ THD + N ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Total harmonic distortion plus noiseÁÁÁÁÁ ÁÁÁÁÁ PO = 250 mW, ÁÁÁÁÁÁ ÁÁÁÁÁÁ f = 200 Hz to 4 kHz,ÁÁÁÁÁ ÁÁÁÁÁ See Figure 7ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ 0.55%ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁÁÁÁÁ ÁÁÁÁ BOM ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Maximum output power bandwidthÁÁÁÁÁ ÁÁÁÁÁ AV = –2 V/V,ÁÁÁÁÁÁ ÁÁÁÁÁÁ THD = 2%, ÁÁÁÁÁ ÁÁÁÁÁ See Figure 7ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ 20ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ kHz ÁÁÁÁ ÁÁÁÁ B1 ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Unity-gain bandwidth ÁÁÁÁÁ ÁÁÁÁÁ Open loop, ÁÁÁÁÁÁ ÁÁÁÁÁÁ See Figure 15 ÁÁÁÁÁ ÁÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ 1.4ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ MHz ÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Supply ripple rejection ratio ÁÁÁÁÁ ÁÁÁÁÁ f = 1 kHz, ÁÁÁÁÁÁ ÁÁÁÁÁÁ CB = 1 µF, ÁÁÁÁÁ ÁÁÁÁÁ See Figure 2 ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ 79 ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ dB ÁÁÁÁ ÁÁÁÁ Vn ÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁ Noise output voltage ÁÁÁÁÁ ÁÁÁÁÁ AV = –1V/V, ÁÁÁÁÁÁ ÁÁÁÁÁÁ CB = 0.1 µF, ÁÁÁÁÁ ÁÁÁÁÁ See Figure 19 ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ 17 ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ µV(rms) NOTE 1: 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 ÁÁÁÁ ÁÁÁÁ |VOS| ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ Output offset voltage (measured differentially) ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ SHUTDOWN = VDD, RL = 8 Ω, RF = 10 kΩ ÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ 20 ÁÁÁ ÁÁÁ mV ÁÁÁÁ PSRR ÁÁÁÁÁÁÁÁÁÁÁÁ Power supply rejection ratio ÁÁÁÁÁÁÁÁÁÁÁÁ VDD = 4.9 V to 5.1 V ÁÁÁÁÁ 78 ÁÁÁÁÁÁ dB ÁÁÁÁ ÁÁÁÁ IDD ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ Supply current ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ SHUTDOWN = VDD, RF = 10 kΩ ÁÁ ÁÁ ÁÁÁ ÁÁÁ 1.45 ÁÁÁ ÁÁÁ 2.5 ÁÁÁ ÁÁÁ mA ÁÁÁÁ ÁÁÁÁ IDD(SD) ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ Supply current, shutdown mode (see Figure 4) ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ SHUTDOWN = 0 V, RF = 10 kΩ ÁÁ ÁÁ ÁÁÁ ÁÁÁ 5 ÁÁÁ ÁÁÁ 1500 ÁÁÁ ÁÁÁ nA ÁÁÁÁ ÁÁÁÁ |IIH| ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ SHUTDOWN, VDD = 5.5 V, Vi = VDD ÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ 1ÁÁÁ ÁÁÁ µA ÁÁÁÁ ÁÁÁÁ |IIL| ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁ SHUTDOWN, VDD = 5.5 V, Vi = 0 V ÁÁ ÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ 1ÁÁÁ ÁÁÁ µA operating characteristics, VDD = 5 V, TA = 25°C, RL = 8 Ω PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ÁÁÁÁ ÁÁÁÁ PO ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ Output power ÁÁÁÁ ÁÁÁÁ THD = 0.5%, ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁ See Figure 13 ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ 700† ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ mW ÁÁÁÁ THD + N ÁÁÁÁÁÁÁÁÁÁ Total harmonic distortion plus noise ÁÁÁÁ PO = 250 mW, ÁÁÁÁÁÁÁ f = 200 Hz to 4 kHz, ÁÁÁÁ See Figure 11 ÁÁÁÁÁÁ 0.5% ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁ BOM ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ Maximum output power bandwidth ÁÁÁÁ ÁÁÁÁ AV = –2 V/V, ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁ THD = 2%, ÁÁÁÁ ÁÁÁÁ See Figure 11 ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ 20 ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ kHz ÁÁÁÁ ÁÁÁÁ B1 ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ Unity-gain bandwidth ÁÁÁÁ ÁÁÁÁ Open loop, ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁ See Figure 16 ÁÁÁÁ ÁÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ 1.4 ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ MHz ÁÁÁÁ ÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ Supply ripple rejection ratio ÁÁÁÁ ÁÁÁÁ f = 1 kHz, ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁ CB = 1 µF, ÁÁÁÁ ÁÁÁÁ See Figure 2ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ 80ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ dB ÁÁÁÁ ÁÁÁÁ Vn ÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁ Noise output voltage ÁÁÁÁ ÁÁÁÁ AV = –1 V/V,ÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁ CB = 0.1 µF, ÁÁÁÁ ÁÁÁÁ See Figure 20ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ 17ÁÁÁ ÁÁÁ ÁÁÁ ÁÁÁ µV(rms) † The GQS and DGN packages, 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. TPA751 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER WITH DIFFERENTIAL INPUTS SLOS336C – DECEMBER 2000 – REVISED OCTOBER 2002 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PARAMETER MEASUREMENT INFORMATION Audio Input Bias Control VDD 6 5 7 VO+ VDD 1 2 4 BYPASS IN – VDD/2 CI RI CS CB RF SHUTDOWN VO– 8 RL = 8 Ω GND 3 IN+ – + – + VDD Figure 1. BTL Mode Test Circuit TYPICAL CHARACTERISTICS Table of Graphs FIGURE kSVR Supply ripple rejection ratio vs Frequency 2 IDD Supply current vs Supply voltage 3, 4 P Output power vs Supply voltage 5 PO Output power vs Load resistance 6 THD N Total harmonic distortion plus noise vs Frequency 7, 8, 11, 12 THD+N Total harmonic distortion plus noise 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 TPA751 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER WITH DIFFERENTIAL INPUTS SLOS336C – DECEMBER 2000 – REVISED OCTOBER 2002 5POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYPICAL CHARACTERISTICS Figure 2 –50 –60 –80 –100 20 100 1k –30 –20 f – Frequency – Hz SUPPLY RIPPLE REJECTION RATIO vs FREQUENCY 0 10k 20k –10 –40 –70 –90 VDD = 5 V VDD = 3.3 V RL = 8 Ω CB = 1 µF Inputs Floating – Su pp ly R ip pl e Re jec tio n R ati o – dB k S VR Figure 3 VDD – Supply Voltage – V SUPPLY CURRENT vs SUPPLY VOLTAGE 1.8 0.8 0.6 1 3 4 5.55 I D D – Su pp ly C ur re nt – m A 2.5 3.5 4.5 1.6 1.2 1.4 SHUTDOWN = VDD RF = 10 kΩ VDD – Supply Voltage – V SUPPLY CURRENT vs SUPPLY VOLTAGE 3 2 0 43 5 7 4 SHUTDOWN = 0 V RF = 10 kΩ 5 6 5.5 I D D – Su pp ly C ur re nt – n A 8 9 10 1 3.52.5 4.5 Figure 4 TPA751 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER WITH DIFFERENTIAL INPUTS SLOS336C – DECEMBER 2000 – REVISED OCTOBER 2002 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYPICAL CHARACTERISTICS VDD – Supply Voltage – V OUTPUT POWER vs SUPPLY VOLTAGE 600 400 200 0 2.5 3.53 4 5.5 1000 P 4.5 5 O – O ut pu t P ow er – m W 800 THD+N 1% f = 1 kHz RL = 32 Ω RL = 8 Ω Figure 5 RL – Load Resistance – Ω OUTPUT POWER vs LOAD RESISTANCE 300 200 100 0 16 3224 40 64 800 8 P 48 56 O – O ut pu t P ow er – m W 400 THD+N = 1% f = 1 kHz VDD = 5 V 500 600 VDD = 3.3 V 700 Figure 6 TPA751 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER WITH DIFFERENTIAL INPUTS SLOS336C – DECEMBER 2000 – REVISED OCTOBER 2002 7POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYPICAL CHARACTERISTICS Figure 7 f – Frequency – Hz TH D +N – To ta l H ar m on ic D is to rti on + N oi se – % TOTAL HARMONIC DISTORTION PLUS NOISE vs FREQUENCY AV = –2 V/V VDD = 3.3 V PO = 250 mW RL = 8 Ω 20 1k 10k 1 0.01 10 0.1 20k100 AV = –20 V/V AV =– 10 V/V Figure 8 f – Frequency – Hz TH D +N – To ta l H ar m on ic D is to rti on + N oi se – % TOTAL HARMONIC DISTORTION PLUS NOISE vs FREQUENCY PO = 125 mW VDD = 3.3 V RL = 8 Ω AV = –2 V/V 20 1k 10k 1 0.01 10 0.1 20k100 PO = 50 mW PO = 250 mW Figure 9 PO – Output Power – W TH D +N – To ta l H ar m on ic D is to rti on + N oi se – % TOTAL HARMONIC DISTORTION PLUS NOISE vs OUTPUT POWER 0 0.15 0.4 1 0.01 10 0.1 0.2 0.25 0.3 0.35 VDD = 3.3 V f = 1 kHz AV = –2 V/V 0.05 0.1 RL = 8 Ω Figure 10 PO – Output Power – W TH D +N – To ta l H ar m on ic D is to rti on + N oi se – % TOTAL HARMONIC DISTORTION PLUS NOISE vs OUTPUT POWER f = 20 kHz VDD = 3.3 V RL = 8 Ω CB = 1 µF AV = –2 V/V 0.01 0.1 1 1 0.01 10 0.1 f = 1 kHz f = 10 kHz f = 20 Hz TPA751 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER WITH DIFFERENTIAL INPUTS SLOS336C – DECEMBER 2000 – REVISED OCTOBER 2002 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYPICAL CHARACTERISTICS Figure 11 f – Frequency – Hz TH D +N – To ta l H ar m on ic D is to rti on + N oi se – % TOTAL HARMONIC DISTORTION PLUS NOISE vs FREQUENCY AV = –2 V/V VDD = 5 V PO = 700 mW RL = 8 Ω 20 1k 10k 1 0.01 10 0.1 20k100 AV = –20 V/V AV = –10 V/V Figure 12 f – Frequency – Hz TH D +N – To ta l H ar m on ic D is to rti on + N oi se – % TOTAL HARMONIC DISTORTION PLUS NOISE vs FREQUENCY PO = 700 mW VDD = 5 V RL = 8 Ω AV = –2 V/V 20 1k 10k 1 0.01 10 0.1 20k100 PO = 50 mW PO = 350 mW Figure 13 PO – Output Power – W 0.1 0.2 10.4 0.5 0.7 0.8 TH D +N – To ta l H ar m on ic D is to rti on + N oi se – % TOTAL HARMONIC DISTORTION PLUS NOISE vs OUTPUT POWER RL = 8 Ω VDD = 5 V f = 1 kHz AV = –2 V/V 1 0.01 10 0.1 0.3 0.6 0.9 Figure 14 PO – Output Power – W TH D +N – To ta l H ar m on ic D is to rti on + N oi se – % TOTAL HARMONIC DISTORTION PLUS NOISE vs OUTPUT POWER f = 20 Hz VDD = 5 V RL = 8 Ω CB = 1 µF AV = –2 V/V 0.01 0.1 1 1 0.01 10 0.1 f = 1 kHz f = 10 kHz f = 20 kHz TPA751 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER WITH DIFFERENTIAL INPUTS SLOS336C – DECEMBER 2000 – REVISED OCTOBER 2002 9POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYPICAL CHARACTERISTICS 10 0 –20 –30 20 30 f – Frequency – kHz 80 –10 180° –180° Gain Phase 60° –60° OPEN-LOOP GAIN AND PHASE vs FREQUENCY O pe n- Lo op G ai n – dB Ph as e 1 101 102 103 104 50 40 60 70 140° 100° 20° –20° –100° –140° VDD = 3.3 V RL = Open Figure 15 10 0 –20 –30 1 20 30 f – Frequency – kHz 80 –10 Gain Phase OPEN-LOOP GAIN AND PHASE vs FREQUENCY O pe n- Lo op G ai n – dB 101 102 103 104 50 40 60 70 VDD = 5 V RL = Open 180° –180° 60° –60° Ph as e 140° 100° 20° –20° –100° –140° Figure 16 TPA751 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER WITH DIFFERENTIAL INPUTS SLOS336C – DECEMBER 2000 – REVISED OCTOBER 2002 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYPICAL CHARACTERISTICS CLOSED-LOOP GAIN AND PHASE vs FREQUENCY –0.5 –1 –1.5 –2 f – Frequency – Hz –0.25 –0.75 –1.25 –1.75 0 0.5 Cl os ed -L oo p G ai n – dB 0.25 0.75 130° 120° 140° Ph as e 150° 160° VDD = 3.3 V RL = 8 Ω PO = 250 mW 1 170° 180° Gain Phase 101 102 103 104 105 106 Figure 17 CLOSED-LOOP GAIN AND PHASE vs FREQUENCY –0.5 –1 –1.5 –2 f – Frequency – Hz –0.25 –0.75 –1.25 –1.75 0 0.5 Cl os ed -L oo p G ai n – dB 0.25 0.75 130° 120° 140° Ph as e 150° 160° VDD = 5 V RL = 8 Ω PO = 700 m W 1 170° 180° Gain Phase 101 102 103 104 105 106 Figure 18 TPA751 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER WITH DIFFERENTIAL INPUTS SLOS336C – DECEMBER 2000 – REVISED OCTOBER 2002 11POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYPICAL CHARACTERISTICS Figure 19 – O ut pu t N oi se V o lta ge – Vµ V n f – Frequency – Hz OUTPUT NOISE VOLTAGE vs FREQUENCY 20 1k 10k 10 1 100 20k100 VO BTL VDD = 3.3 V BW = 22 Hz to 22 kHz RL = 8 Ω or 32 Ω AV = –1 V/V VO+ (rm s) Figure 20 f – Frequency – Hz OUTPUT NOISE VOLTAGE vs FREQUENCY 20 1k 10k 10 1 100 20k100 VDD = 5 V BW = 22 Hz to 22 kHz RL = 8 Ω or 32 Ω AV = –1 V/V VO BTL VO+ – O ut pu t N oi se V o lta ge – Vµ V n (rm s) Figure 21 PD – Output Power – mW POWER DISSIPATION vs OUTPUT POWER 6000 150 100 50 0 350 P D – Po w er D is si pa tio n – m W 200 250 300 RL = 8 Ω 200 400 RL = 32 Ω VDD = 3.3 V Figure 22 PD – Output Power – mW POWER DISSIPATION vs OUTPUT POWER 400 6000 1000 400 300 100 0 800 P D – Po w er D is si pa tio n – m W 500 700 600 200 RL = 32 Ω 200 800 VDD = 5 V RL = 8 Ω TPA751 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER WITH DIFFERENTIAL INPUTS SLOS336C – DECEMBER 2000 – REVISED OCTOBER 2002 12 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION bridged-tied load Figure 23 shows a linear audio power amplifier (APA) in a BTL configuration. The TPA751 BTL amplifier consists of two lin