Texas Instruments TPA3008D2 FUNCTIONAL BLOCK DIAGRAM

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Biases

and

References

TTL Input

Buffer

(VCC Compl)

Start-up and

Protection

Logic

Detect

Thermal

VDDok

RINP

RINN

Ramp

Generator

COSC

ROSC

VCCok

5-V LDO

AVCC

AVDD

VDD

and

PWM

Mode

Logic

Gain

Adj.

Gain

Control

Deglitch

and

PWM

Mode

Logic

Gain

Adj.

LINP

LINN

Gate

Drive

VClamp

Gen

Gate

Drive

PVCC

BSRP

PVCCR(2)

ROUTP(2)

PGNDR

ROUTN(2)

PVCCR(2)

BSRN

Gate

Drive

VClamp

Gen

Gate

Drive

PVCC

BSLP

PVCCL(2)

LOUTP(2)

PGNDL

LOUTN(2)

PVCCL(2)

BSLN

VCLAMPL

VCLAMPR

GAIN0 4To Gain Adj.

Blocks and

Start-up Logic

SHUTDOWN

V2P5

AVCC

AGND(2)

V2P5

Deglitch

GAIN1

AVDDREF

FAULT

TPA3008D2

SLOS435A – MAY 2004 – REVISED JULY 2004

FUNCTIONAL BLOCK DIAGRAM

Contents

Main www.ti.com FEATURES DESCRIPTION Copyright 2004, Texas Instruments Incorporated 10-W STEREO CLASS-D AUDIO POWER AMPLIFIER PRODUCTION DATA information is current as of publication date. ABSOLUTE MAXIMUM RATINGS DISSIPATION RATING TABLE RECOMMENDED OPERATING CONDITIONS TPA3008D2 over operating free-air temperature range (unless otherwise noted) = 25C (unless otherwise noted) AVAILABLE OPTIONS DC ELECTRICAL CHARACTERISTICS TPA3008D2 = 25C, V = 12 V, R = 8 (unless otherwise noted) = 25C, V FUNCTIONAL BLOCK DIAGRAM TPA3008D2 TERMINAL FUNCTIONS TYPICAL CHARACTERISTICS TABLE OF GRAPHS TPA3008D2 TOTAL HARMONIC DISTORTION + NOISE TOTAL HARMONIC DISTORTION + NOISEvs vsFREQUENCY FREQUENCY Figure 5. Figure 6. OUTPUT POWER vsCLOSED-LOOP RESPONSE SUPPLY VOLTAGE Figure 7. Figure 8. OUTPUT POWER EFFICIENCYvs vsSUPPLY VOLTAGE OUTPUT POWER Figure 9. Figure 10. EFFICIENCY SUPPLY CURRENTvs vsTOTAL OUTPUT POWER TOTAL OUTPUT POWER Figure 11. Figure 12. CROSSTALK SUPPLY RIPPLE REJECTION RATIOvs vsFREQUENCY FREQUENCY Figure 13. Figure 14. COMMON-MODE REJECTION RATIOvsFREQUENCY Figure 15. APPLICATION INFORMATION Figure 16. Stereo Class-D With Differential Inputs CLASS-D OPERATION Traditional Class-D Modulation Scheme TPA3008D2 Modulation Scheme Efficiency: LC Filter Required With the Traditional Class-D Modulation Scheme Effects of Applying a Square Wave Into a Speaker When to Use an Output Filter for EMI Suppression RLrds(on)100% 8 Gain setting via GAIN0 and GAIN1 inputs INPUT RESISTANCE Figure 19. Typical LC Output Filter, Cutoff Frequency of 27 kHz, Speaker Impedance = 8 INPUT CAPACITOR, C SHUTDOWN OPERATION USING LOW-ESR CAPACITORS SHORT-CIRCUIT PROTECTION AND AUTOMATIC RECOVERY FEATURE THERMAL PROTECTION PRINTED-CIRCUIT BOARD (PCB) LAYOUT BASIC MEASUREMENT SYSTEM DIFFERENTIAL INPUT AND BTL OUTPUT CLASS-D RC LOW-PASS FILTER Page Page PACKAGING INFORMATION PACKAGE OPTION ADDENDUM TAPE AND REEL BOX INFORMATION PACKAGE MATERIALS INFORMATION Page Page Page Page IMPORTANT NOTICE