TAS5122_07

Manufacturer Part NumberTAS5122_07
Description30-W STEREO DIGITAL AMPLIFIER POWER STAGE
ManufacturerTI [Texas Instruments]
TAS5122_07 datasheet
 


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30 W STEREO DIGITAL AMPLIFIER POWER STAGE
FEATURES
D
2 × 30 W (BTL) Into 6 Ω at 1 kHz
D
95-dB Dynamic Range (in System With
TAS5026)
D
< 0.2% THD+N (in System – 30 W RMS Into
6-Ω Resistive Load)
D
Device Power Efficiency Typical >90% Into
6-Ω Load
D
Self-Protection Design (Including
Undervoltage, Overtemperature, and Short
Conditions) With Error Reports
D
Internal Gate Drive Supply Voltage Regulator
D
EMI Compliant When Used With
Recommended System Design
THD + NOISE vs OUTPUT POWER
1
R L = 6 Ω
T C = 75°C
0.1
0.01
40m
100m
1
P O − Output Power − W
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.
PurePath Digital and PowerPAD are trademarks of Texas Instruments.
Other trademarks are the property of their respective owners.
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.
SLES088E – AUGUST 2003 – REVISED DECEMBER 2004
APPLICATIONS
D
DVD Receiver
D
Home Theatre
D
Mini/Micro Component Systems
D
Internet Music Appliance
DESCRIPTION
The TAS5122 is a high-performance, integrated stereo
digital amplifier power stage designed to drive 6-Ω
speakers at up to 30 W per channel. The device
incorporates TI’s PurePath Digitalt technology and is
used with a digital audio PWM processor (TAS50XX) and
a simple, passive demodulation filter to deliver
high-quality,
high-efficiency,
amplification.
The efficiency of this digital amplifier is typically greater
than 90%. Overcurrent protection, overtemperature
protection, and undervoltage protection are built into the
TAS5122, safeguarding the device and speakers against
fault conditions that could damage the system.
THD + NOISE vs FREQUENCY
1
R L = 6 Ω
T C = 75°C
0.1
0.01
10
40
20
100
Copyright  2004, Texas Instruments Incorporated
TAS5122
TM
true-digital
audio
P O = 30 W
P O = 10 W
P O = 1 W
1k
10k
20k
f − Frequency − Hz

TAS5122_07 Summary of contents

  • Page 1

    W STEREO DIGITAL AMPLIFIER POWER STAGE FEATURES D 2 × (BTL) Into 6 Ω kHz D 95-dB Dynamic Range (in System With TAS5026) D < 0.2% THD+N (in System – RMS Into ...

  • Page 2

    TAS5122 SLES088E – AUGUST 2003 – REVISED DECEMBER 2004 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 ...

  • Page 3

    TERMINAL FUNCTION (1) FUNCTION (1) NAME NO. BST_A 54 P BST_B 43 P BST_C 42 P BST_D 31 P DGND 6 P DREG 13 P DREG_RTN 17 P DVDD 4 P GND 27, 28, ...

  • Page 4

    TAS5122 SLES088E – AUGUST 2003 – REVISED DECEMBER 2004 FUNCTIONAL BLOCK DIAGRAM PWM_AP PWM Receiver RESET PWM_BP PWM Receiver To Protection Blocks OTW OT Protection SD UVP PWM_CP PWM Receiver RESET PWM_DP PWM Receiver 4 GREG Gate Drive Timing Control ...

  • Page 5

    RECOMMENDED OPERATING CONDITIONS Digital supply (1) DVDD Supply for internal gate drive and logic GVDD regulators PVDD_x Half-bridge supply T J Junction temperature ( recommended for DVDD to be connected to DREG via a 100-Ω resistor. ELECTRICAL ...

  • Page 6

    TAS5122 SLES088E – AUGUST 2003 – REVISED DECEMBER 2004 ELECTRICAL CHARACTERISTICS PVDD_x = 23 V, GVDD = 23 V, DVDD = 3 Ω 384 kHz, unless otherwise noted SYMBOL PARAMETER INPUT/OUTPUT ...

  • Page 7

    SYSTEM CONFIGURATION USED FOR CHARACTERIZATION (BTL µ ERR_RCVY 7 PWM_AP_1 8 PWM_AM_1 9 VALID_1 100 nF 13 PWM PROCESSOR 14 TAS50xx PWM_AP_2 18 PWM_AM_2 19 VALID_2 ...

  • Page 8

    TAS5122 SLES088E – AUGUST 2003 – REVISED DECEMBER 2004 Figure 1. Typical Single-Ended Design With TAS5122 DCA 8 www.ti.com ...

  • Page 9

    TYPICAL CHARACTERISTICS TOTAL HARMONIC DISTORTION + NOISE vs OUTPUT POWER Ω 75°C TAS5122SE 1 0.1 TAS5122BTL 0.01 500m − Output Power − W Figure 2 −60 dBFS ...

  • Page 10

    TAS5122 SLES088E – AUGUST 2003 – REVISED DECEMBER 2004 OUTPUT POWER vs H-BRIDGE VOLTAGE 75° Ω ...

  • Page 11

    AMPLITUDE vs FREQUENCY 3.0 2.5 2.0 1 Ω 1 Ω 0.5 0.0 −0.5 −1.0 −1.5 −2.0 −2.5 −3.0 10 100 1k f − Frequency − Hz Figure 10 SLES088E – AUGUST ...

  • Page 12

    TAS5122 SLES088E – AUGUST 2003 – REVISED DECEMBER 2004 THEORY OF OPERATION POWER SUPPLIES The power device only requires two supply voltages, GVDD and PVDD_x. GVDD is the gate drive supply for the device, regulated internally down to approximately 12 ...

  • Page 13

    In practice this means that the DVDD-to-PWM processor should be stable and initialization should be completed before RESET is deasserted to the power stage. CONTROL I/O Shutdown Pin: SD The SD pin functions as an output pin and is ...

  • Page 14

    TAS5122 SLES088E – AUGUST 2003 – REVISED DECEMBER 2004 3. After n/2 cycles, the protection latch is cleared but the output stage remains Hi-Z (identical to pulling RESET low). 4. After n cycles, operation is resumed (identical to pulling RESET ...

  • Page 15

    Another parameter to be considered is the idle current loss in the inductor. This can be measured or specified as inductor dissipation (D). The target specification for dissipation is less than 0.05. In general, 10-µH inductors suffice for most ...

  • Page 16

    TAS5122 SLES088E – AUGUST 2003 – REVISED DECEMBER 2004 achieved by improving the thermal conduction paths that remove heat from the component. The thermal pad is formed using a patented lead-frame design and manufacturing technique to provide a direct connection ...

  • Page 17

    Insulating Front Panel PCB (3.65C/W) Stereo Amplifier Board Ó Ó Ó Ó Ó Ó Ó Ó Ó Ó Ó Ó Ó Ó Ó Ó Ó Ó Ó Ó Ó Wakefield Type 126 Thermal Compound Wakefield Type 126 Under Via ...

  • Page 18

    TAS5122 SLES088E – AUGUST 2003 – REVISED DECEMBER 2004 LAND PATTERN 7×13 vias (5×10 mm) 5×11 vias (4×8 mm) Thermal Pad 3,90 mm 2,98 mm Figure 18. Thermal Pad Dimensions for DCA Package CLICK AND POP REDUCTION TI modulators feature ...

  • Page 19

    PACKAGING INFORMATION (1) Orderable Device Status TAS5122DCA ACTIVE TAS5122DCAG4 ACTIVE TAS5122DCAR ACTIVE TAS5122DCARG4 ACTIVE (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be ...

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  • Page 22

    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 ...