Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsLinear ICsLinear IC - Audio amplifier 2-channel (stereo) Class D TSSOP 24

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FEATURES

PGND

LOUTN

GAIN0

LINN

AGND

COSC

RINN

SHUTDOWN

ROUTN

PGND

LOUTP

BYPASS

LINP

ROSC

RINP

GAIN1

ROUTP

PGND

PW OR PWP PACKAGE

(TOP VIEW)

DESCRIPTION

TPA2000D2

SLOS291F – MARCH 2000 – REVISED MARCH 2007

2-W FILTERLESS STEREO CLASS-D AUDIO POWER AMPLIFIER

• Short-Circuit Protection (Short to Battery,

Ground, and Load)

• Modulation Scheme Optimized to Operate

Without a Filter • -40°C to 85°C Operating Temperature Range

• 2 W Into 3- Ω Speakers (THD+N< 0.4%)

• < 0.08% THD+N at 1 W, 1 kHz, Into 4- Ω Load

• Extremely Efficient Third Generation 5-V

Class-D Technology:

– Low Supply Current (No Filter) . . . 8 mA

– Low Supply Current (Filter) . . . 15 mA

– Low Shutdown Current . . . 1 µA

– Low Noise Floor . . . 56 µV

RMS

– Maximum Efficiency Into 3 Ω , 65-70%

– Maximum Efficiency Into 8 Ω , 75-85%

– 4 Internal Gain Settings . . . 8-23.5 dB

– PSRR . . . -77 dB

• Integrated Depop Circuitry

The TPA2000D2 is the third generation 5-V class-D amplifier from Texas Instruments. Improvements to previous

generation devices include: lower supply current, lower noise floor, better efficiency, four different gain settings,

smaller packaging, and fewer external components. The most significant advancement with this device is its

modulation scheme that allows the amplifier to operate without the output filter. Eliminating the output filter saves

the user approximately 30% in system cost and 75% in PCB area.

The TPA2000D2 is a monolithic class-D power IC stereo audio amplifier, using the high switching speed of

power MOSFET transistors. These transistors reproduce the analog signal through high-frequency switching of

the output stage. The TPA2000D2 is configured as a bridge-tied load (BTL) amplifier capable of delivering

greater than 2 W of continuous average power into a 3- Ω load at less than 1% THD+N from a 5-V power supply

in the high fidelity range (20 Hz to 20 kHz). With 1 W being delivered to a 4- Ω load at 1 kHz, the typical THD+N

is less than 0.08%.

A BTL configuration eliminates the need for external coupling capacitors on the output. Low supply current of 8

mA makes the device ideal for battery-powered applications. Protection circuitry increases device reliability:

thermal, over-current, and under-voltage shutdown.

Efficient class-D modulation enables the TPA2000D2 to operate at full power into 3- Ω loads at an ambient

temperature of 85°C.

AVAILABLE OPTIONS

(1)

PACKAGED DEVICE

TSSOP (PW) TSSOP (PWP)

(2)

–40°C to 85°C TPA2000D2PW TPA2000D2PWP

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

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

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

the part number (e.g., TPA2000D2PWPR).

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 the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (23 pages)

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TPA2000D2 www.ti.com SLOS291F – MARCH 2000 – REVISED MARCH 2007 2-W FILTERLESS STEREO CLASS-D AUDIO POWER AMPLIFIER • FEATURES • • • • • Modulation Scheme Optimized to Operate Without a Filter 2 W Into 3-Ω Speakers (THD+N< 0.4%) < 0.08% THD+N at 1 W, 1 kHz, Into 4-Ω Load Extremely Efficient Third Generation 5-V Class-D Technology: – Low Supply Current (No Filter) . . . 8 mA – Low Supply Current (Filter) . . . 15 mA – Low Shutdown Current . . . 1 µA – Low Noise Floor . . .
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TPA2000D2 www.ti.com SLOS291F – MARCH 2000 – REVISED MARCH 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.
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TPA2000D2 www.ti.com SLOS291F – MARCH 2000 – REVISED MARCH 2007 TERMINAL FUNCTION TERMINAL NAME NO. I/O DESCRIPTION AGND 6 - Analog ground BYPASS 22 I Tap to voltage divider for internal midsupply bias generator used for analog reference. COSC 7 I A capacitor connected to this terminal sets the oscillation frequency in conjunction with ROSC. For proper operation, connect a 220 pF capacitor from COSC to ground.
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TPA2000D2 www.ti.com SLOS291F – MARCH 2000 – REVISED MARCH 2007 RECOMMENDED OPERATING CONDITIONS MIN TYP MAX 4.5 5.5 UNIT VDD, PVDD Supply voltage VIH High-level input voltage GAIN0, GAIN1, SHUTDOWN VIL Low-level input voltage GAIN0, GAIN1, SHUTDOWN ROSC Oscillator resistance 120 COSC Oscillator capacitance 220 fs Switching frequency 200 300 kHz TA Operating free-air temperature -40 85 °C 2 V V 0.
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TPA2000D2 www.ti.com SLOS291F – MARCH 2000 – REVISED MARCH 2007 TYPICAL CHARACTERISTICS Table of Graphs FIGURE η THD+N Efficiency vs Output power FFT at 1.
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TPA2000D2 www.ti.com SLOS291F – MARCH 2000 – REVISED MARCH 2007 TYPICAL CHARACTERISTICS EFFICIENCY vs OUTPUT POWER EFFICIENCY vs OUTPUT POWER 90 80 Ferrite Bead Filter LC Filter 80 70 70 No Filter 60 LC Filter Notebook Speaker Efficiency − % 60 Efficiency − % Ferrite Bead Filter 50 Class−AB 40 30 50 40 Class−AB 30 20 20 RL = 8 Ω, Multimedia Speaker VDD = 5 V 10 0 0 0.2 0.4 0.6 0.8 PO − Output Power − W 1 RL = 3 Ω, Notebook PC Speaker VDD = 5 V 10 0 1.2 0 0.5 1 1.
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TPA2000D2 www.ti.com SLOS291F – MARCH 2000 – REVISED MARCH 2007 TYPICAL CHARACTERISTICS (continued) TOTAL HARMONIC DISTORTION PLUS NOISE vs OUTPUT POWER TOTAL HARMONIC DISTORTION PLUS NOISE vs OUTPUT POWER 10 VDD = 5 V Gain = 23.5 dB RL = 3 Ω THD+N − Total Harmonic Distortion − % THD+N − Total Harmonic Distortion − % 10 1 1 kHz 20 Hz 0.1 20 kHz 0.01 10 m 100 m PO − Output Power − W 1 2 1 1 kHz 20 Hz 0.1 20 kHz 0.01 10 m 3 1 100 m 2 3 PO − Output Power − W Figure 5. Figure 6.
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TPA2000D2 www.ti.com SLOS291F – MARCH 2000 – REVISED MARCH 2007 TYPICAL CHARACTERISTICS (continued) THD+N − Total Harmonic Distortion − % TOTAL HARMONIC DISTORTION PLUS NOISE vs FREQUENCY 10 VDD = 5 V Gain = 23.5 dB RL = 8 Ω 1 0.1 W 1W 0.1 0.5 W 0.01 20 100 1k f − Frequency − Hz 20 k Figure 9.
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TPA2000D2 www.ti.com SLOS291F – MARCH 2000 – REVISED MARCH 2007 APPLICATION INFORMATION ELIMINATING THE OUTPUT FILTER WITH THE TPA2000D2 This section focuses on why the user can eliminate the output filter with the TPA2000D2. EFFECT ON AUDIO The class-D amplifier outputs a pulse-width modulated (PWM) square wave, which is the sum of the switching waveform and the amplified input audio signal.
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TPA2000D2 www.ti.com SLOS291F – MARCH 2000 – REVISED MARCH 2007 APPLICATION INFORMATION (continued) OUT+ OUT– Differential Voltage Across Load Output = 0 V +5 V 0V –5 V Current OUT+ OUT– Differential Voltage Across Load Output > 0 V +5 V 0V –5 V Current Figure 13.
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TPA2000D2 www.ti.com SLOS291F – MARCH 2000 – REVISED MARCH 2007 APPLICATION INFORMATION (continued) damage could occur to the speaker if the voice coil is not designed to handle the additional power. To size the speaker for added power, the ripple current dissipated in the load needs to be calculated by subtracting the theoretical supplied power, PSUP THEORETICAL, from the actual supply power, PSUP, at maximum output power, POUT.
PAGE 12
TPA2000D2 www.ti.com SLOS291F – MARCH 2000 – REVISED MARCH 2007 INPUT RESISTANCE Each gain setting is achieved by varying the input resistance of the amplifier, which can range from its smallest value to over 6 times that value.
PAGE 13
TPA2000D2 www.ti.com SLOS291F – MARCH 2000 – REVISED MARCH 2007 SWITCHING FREQUENCY The switching frequency is determined using the values of the components connected to ROSC (pin 18) and COSC (pin 7) and is calculated with the following equation: fs + 6.6 ROSC C OSC (8) The switching frequency was chosen to be centered on 250 kHz. This frequency is the optimum audio fidelity of oversampling and of maximizing efficiency by minimizing the switching losses of the amplifier.
PAGE 14
TPA2000D2 www.ti.com SLOS291F – MARCH 2000 – REVISED MARCH 2007 USING LOW-ESR CAPACITORS Low-ESR capacitors are recommended throughout this application section. A real (as opposed to ideal) capacitor can be modeled simply as a resistor in series with an ideal capacitor. The voltage drop across this resistor minimizes the beneficial effects of the capacitor in the circuit. The lower the equivalent value of this resistance the more the real capacitor behaves like an ideal capacitor. EVALUATION CIRCUIT C1 0.
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PACKAGE OPTION ADDENDUM www.ti.
PAGE 16
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) TPA2000D2PWPR HTSSOP PWP 24 2000 330.0 16.4 TPA2000D2PWR TSSOP PW 24 2000 330.0 16.4 Pack Materials-Page 1 B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant 6.95 8.3 1.6 8.0 16.0 Q1 6.95 8.3 1.6 8.0 16.
PAGE 17
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) TPA2000D2PWPR HTSSOP PWP 24 2000 367.0 367.0 38.0 TPA2000D2PWR TSSOP PW 24 2000 367.0 367.0 38.
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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 JESD46C and to discontinue any product or service per JESD48B. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.