TAS5122

Manufacturer Part NumberTAS5122
ManufacturerTexas Instruments
TAS5122 datasheet
 


Specifications of TAS5122

Max. Power To Bridge Tied Load37Min. Supported Bridge Tied Load6
Closed/open LoopOpenMax. Number Of Speaker Outputs2
Input TypePWMControl TypeHardware
Analog Supply Min [v]16Analog Supply Max [v]25.5
Digital Supply Min [v]3Power Stage Supply Max(v)25.5
Pin/package56HTSSOP  
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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 Summary of contents

  • Page 1

    ... 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 per channel. The device incorporates TI’s PurePath Digitalt technology and is used with a digital audio PWM processor (TAS50XX) and ...

  • Page 2

    ... BST_C 41 PVDD_C PACKAGE PVDD_C 40 56-pin DCA TSSOP 39 OUT_C (1) The TAS5122 package is thermally enhanced for conductive 38 OUT_C cooling using an exposed metal pad area impractical to use the 37 GND device with the pad exposed to ambient air as the only heat sinking 36 GND of the device. ...

  • Page 3

    ... Input signal (negative), half-bridge B Input signal (positive), half-bridge B Input signal (negative), half-bridge C Input signal (positive), half-bridge C Input signal (negative), half-bridge D Input signal (positive), half-bridge D Reset signal, active low Reset signal, active low Shutdown signal for half-bridges A and B Shutdown signal for half-bridges C and D TAS5122 3 ...

  • 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 Gate Drive Protection A GREG Protection B ...

  • Page 5

    ... It is recommended for DVDD to be connected to DREG via a 100-Ω resistor. ELECTRICAL CHARACTERISTICS PVDD_X = 23 V, GVDD = 23 V, DVDD = 3.3 V, DVDD connected to DREG via a 100-Ω resistor Ω 384 kHz, unless otherwise noted. AC performance is recorded as a chipset with TAS5010 as the PWM processor and TAS5122 as the power stage. SYMBOL PARAMETER ...

  • 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 PROTECTION V uvp,G V uvp,G Undervoltage protection limit, GVDD Undervoltage protection limit, GVDD OTW Overtemperature warning ...

  • Page 7

    ... DGND OUT_A 33 PVDD_A GND 32 PVDD_A DVDD GREG BST_A 1.5 Ω 30 GND GVDD 29 GND GND TAS5122 100 nF L PCB (2) 10 µH (1) 4.7 kΩ 470 nF 100 nF 10 µH 4.7 kΩ 100 nF 100 nF L PCB (2) 1000 µF L PCB (2) 10 µH (1) 4.7 kΩ 470 nF 100 nF 10 µH 4.7 kΩ ...

  • Page 8

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

  • Page 9

    ... Ω 75° 100 f − Frequency − Hz Figure 3 TOTAL HARMONIC DISTORTION + NOISE OUTPUT POWER Ω 75°C 0.1 0.01 40m 100m − Output Power − W Figure 5 TAS5122 10k 20k ...

  • Page 10

    ... TAS5122 SLES088E – AUGUST 2003 – REVISED DECEMBER 2004 OUTPUT POWER vs H-BRIDGE VOLTAGE 75° Ω VDD − Supply Voltage − V Figure 6 POWER LOSS vs OUTPUT POWER kHz Ω ...

  • Page 11

    ... Frequency − Hz Figure 10 SLES088E – AUGUST 2003 – REVISED DECEMBER 2004 ON-STATE RESISTANCE JUNCTION TEMPERATURE 200 190 180 170 160 150 140 130 120 10k 50k − Junction Temperature − °C TAS5122 100 Figure 11 11 ...

  • Page 12

    ... When TI PWM processors are used with TI power stages, the correct timing control of RESET and PWM_xP is performed by the modulator. Precaution The TAS5122 must always start up in the high-impedance (Hi-Z) state. In this state, the bootstrap (BST) capacitor is precharged by a resistor on each PWM output node to ground. ...

  • Page 13

    ... Normal operation, no errors/warnings Chip Protection The TAS5122 protection function is implemented in a closed loop with, for example, a system controller or other TI PWM processor device. The TAS5122 contains three individual systems protecting the device against fault conditions. All of the error events covered result in the ...

  • Page 14

    ... A. If this rule is observed, the TAS5122 does not have distortion issues due to the output inductors, and overcurrent conditions do not occur due to inductor saturation in the output filter. ...

  • Page 15

    ... The graph in Figure 14 displays the inductance vs current characteristics of two inductors that are recommended for use with the TAS5122. INDUCTANCE vs CURRENT 11 DFB1310A ...

  • Page 16

    ... Figure 15 shows a recommended land pattern on the PCB. Copper Layer − Component Side Solder PowerPAD TAS5122DCA 5y11 Vias (f 0.3 mm from shorting to the chassis. The thermal compound shown has a pad-to-aluminum bar thermal resistance of about 3.2°C/W. The chassis provides the only heatsink to air and is chosen as representative of a typical production cooling approach ...

  • Page 17

    ... Wakefield Type 126 Thermal Compound Under Via Pads decrease in thermal resistance through the PCB with a corresponding increase in the land pattern size. Use the table for thermal design tradeoffs. TAS5122 Insulating Back Panel 1 mm With Star Washer and Nut (3 Places) ...

  • Page 18

    ... RESET LH during a system start-up. To make this system work properly, the following design rules must be followed when using the TAS5122 power stage: D The relative timing between the PWM_AP/M_x signals and their corresponding VALID_x signal ...

  • Page 19

    ... 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 discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design ...

  • Page 20

    ... TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing TAS5122DCAR HTSSOP DCA PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 (mm) Diameter Width (mm) W1 (mm) 56 2000 330.0 24.4 8.6 Pack Materials-Page 1 19-Mar-2008 B0 (mm) K0 (mm Pin1 (mm) (mm) Quadrant 15 ...

  • Page 21

    ... Device Package Type TAS5122DCAR HTSSOP PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm) DCA 56 2000 Pack Materials-Page 2 19-Mar-2008 Width (mm) Height (mm) 346.0 346.0 41.0 ...

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  • Page 24

    ... 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’ ...