Texas Instruments TPA3200D1 Owner's Manual
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Texas Instruments TPA3200D1 Owner's Manual

Texas Instruments TPA3200D1 Owner's Manual

20-w mono digital input audio amplifier
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FEATURES
Digital Interface
– 24-bit Resolution
2
– Supports I
S and 16-Bit Word
Right-Justified Digital Input Formats
– Multiple Sampling Frequencies:
5 kHz – 200 kHz
– 8x Oversampling Digital Filter
– Soft Mute
Power Amplifier
– 20-W into an 8-
– Efficient Operation Eliminates Need for Heat
Sinks
– Three Selectable, Fixed Gain Settings
– Thermal and Short-Circuit Protection
TAS3103
Digital Audio
Processor
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 the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
20-W MONO DIGITAL INPUT AUDIO AMPLIFIER
Load from an 18-V Supply
Simplified Application Circuit
2
I
S or 16-bit RJ
{
Control
Inputs
{
Gain Select
Shutdown Control
Channel Select
Zero Input Flag
+5V
+18V
DESCRIPTION
The TPA3200D1 is a 20-W (per channel) efficient,
digital audio power amplifier for driving a bridged-tied
speaker. The TPA3200D1 can drive a speaker with
an impedance as low as 4
the TPA3200D1 (85%) eliminates the need for an
external heat sink.
The digital input accepts 16-24 bit data in I
or 16-bit word right-justified. A digital filter performs
an 8x interpolation function. Other features include
soft mute, a zero input detect output flag for power
conscious designs, and power saving shutdown
mode.
DATA
FLT1
FLT2
SCLK
VCOM
BCK
VREF
LRCK
BYPASS
FORMAT
COSC
MUTE
ROSC
DEMP
TPA3200D1
AGND
GAIN0
GAIN1
BSN
OUTN
SHUTDOWN
OUTP
LR_SEL
BSP
ZERO
VCLAMP
VDD
PGND
PVCC
AVCC
DGND
SLOS442A – MAY 2005 – REVISED JULY 2005
. The high efficiency of
22 nF
10 mF
1 mF
1 mF
220 pF
120 kW
0.22 mF
51 W
51 W
0.22 mF
1.0 mF
Copyright © 2005, Texas Instruments Incorporated
TPA3200D1
2
S format

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  • Page 1 Instruments standard warranty. Production processing does not necessarily include testing of all parameters. DESCRIPTION The TPA3200D1 is a 20-W (per channel) efficient, digital audio power amplifier for driving a bridged-tied speaker. The TPA3200D1 can drive a speaker with an impedance as low as 4 the TPA3200D1 (85%) eliminates the need for an external heat sink.

  • Page 2: Available Options

    TPA3200D1 SLOS442A – MAY 2005 – REVISED JULY 2005 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.

  • Page 3: Recommended Operating Conditions

    At 20 kHz At 44 kHz = 44.1 KHz, 96 KHz, 192 KHz and oversampling rate = 64 f TPA3200D1 SLOS442A – MAY 2005 – REVISED JULY 2005 VDD x 0.7 VDD x 0.3 and 24-bit data, unless otherwise noted 0.454 f...

  • Page 4: Operating Characteristics

    TPA3200D1 SLOS442A – MAY 2005 – REVISED JULY 2005 FORMAT CHARACTERISTICS All specifications at T = 25 C, V = 5 V, f PARAMETER Resolution Data Audio-data interface format Audio Audio-data bit length Audio Audio data format System clock frequency...

  • Page 5: Functional Block Diagram

    Modulator Clamp DAC and Reference 2:1 Mux Deglitch Logic Deglitch Logic Ramp Generator VREF AGND AVCC VREF TPA3200D1 SLOS442A – MAY 2005 – REVISED JULY 2005 Zero Detect ZERO Power Supply DGND VCLAMP PVCC Gate OUTN Drive PGND PVCC Gate...
  • Page 6 TPA3200D1 SLOS442A – MAY 2005 – REVISED JULY 2005 (TOP VIEW) DATA LRCK DGND LR_SEL DGND VCOM GAIN0 GAIN1 SHUTDOWN PGND VCLAMP PVCC OUTN OUTN PGND PGND www.ti.com SCLK FORMAT MUTE DEMP DGND ZERO DGND FLT1 FLT2 VREF BYPASS COSC...
  • Page 7 Midrail digital reference voltage Noise-filter terminals. Connect capacitor across pins 36 and 37 Connect to AGND and PGND - should be the center point for both grounds. Internal esistive connection to AGND. TPA3200D1 SLOS442A – MAY 2005 – REVISED JULY 2005 DESCRIPTION...

  • Page 8: Typical Characteristics

    TPA3200D1 SLOS442A – MAY 2005 – REVISED JULY 2005 Total Harmonic Distortion Plus Noise Output Power = 12 V = 8 W Gain = 18 dB = 48 kHz 24−bit, I S format 0.05 0.02 20 Hz 0.01 100m 200m −...
  • Page 9 Total Harmonic Distortion Plus Noise Frequency = 18 V = 8 W Gain = 23.6 dB = 48 kHz 24−bit, I S format = 500 mW = 1 W = 5 W 100 200 f − Frequency − Hz Figure 8. TPA3200D1...
  • Page 10 TPA3200D1 SLOS442A – MAY 2005 – REVISED JULY 2005 TYPICAL CHARACTERISTICS (continued) Total Harmonic Distortion Frequency = 12 V R = 4 Ù Gain = 18 dB f = 48 kHz 24-Bit, I S format P = 2 W P = 200 mW 0.05...
  • Page 11 = 18 V 3.6 4 = 44.1 kHz −0.1 −0.2 −0.3 −0.4 −0.5 TPA3200D1 SLOS442A – MAY 2005 – REVISED JULY 2005 Maximum Output Power Load Impedance = 60 C = 18 V = 15 V = 12 V − Load Impedance −...

  • Page 12: Application Information

    TPA3200D1 SLOS442A – MAY 2005 – REVISED JULY 2005 S/RJ Clocks & Data 10 F 0.1 mF 10 mF Gain Control Shutdown Control 51 W 1 mF 22 mF APPLICATION INFORMATION SCLK FORMAT DATA MUTE LRCK DEMP DGND DGND ZERO...
  • Page 13 4), BCK (pin 1), and DATA (pin 3). BCK is the serial audio bit clock, and it is used to clock the serial data present on DATA into the serial shift register of the audio interface. Serial data is clocked into the TPA3200D1 on the rising edge of BCK.
  • Page 14 AUDIO DATA FORMATS AND TIMING The TPA3200D1 supports I S and 16-bit-word right-justified. The data formats are shown in formats are selected using the FORMAT pin on the TPA3200D1. All formats require binary 2s-complement, MSB-first audio data. Figure 19 shows a detailed timing diagram for the serial audio interface.
  • Page 15 0 level for 1024 sampling periods (or LRCK clock periods), the ZERO flag output is set to a logic 1 state. The ZERO-pin output can be inverted using a standard logic gate or transistor, and connected to the SHUTDOWN terminal (pin 13). This places the TPA3200D1 into a low-current state, conserving power, and disables the switching outputs. L-Channel...

  • Page 16: Register Control

    OVERSAMPLING RATE CONTROL The TPA3200D1 automatically controls the oversampling rate of the delta-sigma D/A converters with the system clock rate. The oversampling rate is set to 64× oversampling with every system clock and sampling frequency.

  • Page 17: Class-D Operation

    CLASS-D OPERATION This section focuses on the class-D operation of the TPA3200D1. Traditional Class-D Modulation Scheme The traditional class-D modulation scheme, which is used in the TPA032D0x family, has a differential output where each output is 180 degrees out of phase and changes from ground to the supply voltage, VCC. Therefore, the differential pre-filtered output varies between positive and negative V 0 V across the load.
  • Page 18 TPA3200D1 Modulation Scheme The TPA3200D1 uses a modulation scheme that still has each output switching from ground to V OUTP and OUTN are now in phase with each other with no input. The duty cycle of OUTP is greater than 50% and OUTN is less than 50% for positive output voltages.

  • Page 19: Maximum Output Power

    Driving The Output Into Clipping The output of the TPA3200D1 may be driven into clipping to attain a higher output power than is possible with no distortion. Clipping is typically quantified by a THD measurement of 10%. The amount of additional power into...

  • Page 20: Short Circuit Protection

    Figure 26. Typical LC Output Filter for 8- SHORT-CIRCUIT PROTECTION The TPA3200D1 has short circuit protection circuitry on the outputs that prevents damage to the device during output-to-output shorts, output-to-GND shorts, and output-to-V outputs, the part immediately disables the output drive and enters into shutdown mode. This is a latched fault and must be reset by cycling the voltage on the SHUTDOWN pin to a logic low and back to the logic high state for normal operation.

  • Page 21: Thermal Protection

    O(average) Efficiency + X 75% for an 4−W load Efficiency + X 85% for an 8−W load Example. What is the maximum ambient temperature for an application that requires the TPA3200D1 to drive 20 W into an 8- speaker? + 20 W Dissipated 0.85...
  • Page 22 12 dB. POWER SUPPLY DECOUPLING The TPA3200D1 is a high-performance CMOS audio amplifier that requires adequate power supply decoupling to ensure the output total harmonic distortion (THD) is as low as possible. Power supply decoupling also prevents oscillations for long lead lengths between the amplifier and the speaker.

  • Page 23: Shutdown Operation

    This ensures the best noise performance. PRINTED-CIRCUIT BOARD (PCB) LAYOUT Because the TPA3200D1 is a class-D amplifier that switches at a high frequency, the layout of the printed-circuit board (PCB) should be optimized according to the following guidelines for the best possible performance.

  • Page 24: Packaging Information

    www.ti.com PACKAGING INFORMATION Orderable Device Status TPA3200D1DCP NRND TPA3200D1DCPG4 NRND TPA3200D1DCPR NRND TPA3200D1DCPRG4 NRND The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs.

  • Page 25: Tape And Reel Information

    www.ti.com TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing TPA3200D1DCPR HTSSOP PACKAGE MATERIALS INFORMATION Pins Reel Reel A0 (mm) Diameter Width (mm) W1 (mm) 2000 330.0 24.4 Pack Materials-Page 1 11-Mar-2008 B0 (mm) K0 (mm) Pin1 (mm) (mm)
  • Page 26 PACKAGE MATERIALS INFORMATION www.ti.com 11-Mar-2008 *All dimensions are nominal Device Package Type Package Drawing Pins Length (mm) Width (mm) Height (mm) TPA3200D1DCPR HTSSOP 2000 346.0 346.0 41.0 Pack Materials-Page 2...

  • Page 29: Important Notice

    Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.

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