TAS5121

Manufacturer Part NumberTAS5121
ManufacturerTexas Instruments
TAS5121 datasheet
 


Specifications of TAS5121

Max. Power To Bridge Tied Load100Min. Supported Bridge Tied Load4
Closed/open LoopOpenMax. Number Of Speaker Outputs1
Input TypePWMControl TypeHardware
Analog Supply Min [v]10.8Analog Supply Max [v]13.2
Digital Supply Min [v]3Power Stage Supply Max(v)32
Pin/package36HSSOP  
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DIGITAL AMPLIFIER POWER STAGE
FEATURES
D
100-W RMS Power (BTL) Into 4 Ω With Less
Than 10% THD+N
D
80-W RMS Power (BTL) Into 4 Ω With Less
Than 0.2% THD+N
D
0.05% THD+N at 1 W Into 4 Ω
D
Power Stage Efficiency Greater Than 90%
Into 4 Ω Load
D
Self-Protecting Design
D
36-Pin PSOP3 Package
D
3.3-V Digital Interface
D
EMI Compliant When Used With
Recommended System Design
TOTAL HARMONIC DISTORTION + NOISE
vs
POWER
10
R L = 4 Ω
T C = 75°C
Gain = 3 dB
1
0.1
0.01
0.1
1
10
P − 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.
SLES086A − NOVEMBER 2003 − REVISED MARCH 2004
APPLICATIONS
D
DVD Receiver
D
Home Theatre
D
Mini/Micro Component Systems
D
Internet Music Appliance
DESCRIPTION
The TAS5121 is a high-performance digital amplifier
power stage designed to drive a 4-Ω speaker up to 100 W.
The device incorporates PurePath Digital technology
and can be used with a TI audio PWM processor and a
simple passive demodulation filter to deliver high-quality,
high-efficiency digital audio amplification.
The efficiency of this digital amplifier can be greater than
90%, depending on the system design. Overcurrent
protection, overtemperature protection, and undervoltage
protection are built into the TAS5121, safeguarding the
device and speakers against fault conditions that could
damage the system.
UNCLIPPED OUTPUT POWER
vs
H-BRIDGE VOLTAGE
90
80
70
60
50
40
30
20
10
0
100
0
4
8
12
16
PVDD_X − H-Bridge Voltage − V
Copyright  2004, Texas Instruments Incorporated
TAS5121
TM
4 Ω
6 Ω
8 Ω
20
24
28
32

TAS5121 Summary of contents

  • Page 1

    ... The efficiency of this digital amplifier can be greater than 90%, depending on the system design. Overcurrent protection, overtemperature protection, and undervoltage protection are built into the TAS5121, safeguarding the device and speakers against fault conditions that could damage the system. UNCLIPPED OUTPUT POWER ...

  • Page 2

    ... TAS5121DKDR PACKAGE DISSIPATION RATINGS PACKAGE 36-Pin DKD PSOP3 (1) The TAS5121 package is thermally enhanced for conductive cooling using an exposed metal pad area impractical to use the devices with the pad exposed to ambient air as the only heat sinking of the device. For this reason, R θJA, a system parameter that characterizes the thermal treatment, is provided in the Application Information section of the data sheet ...

  • Page 3

    ... PWM_BP 2 I PWM input signal, half-bridge B RESET 4 I Reset signal, active-low Shutdown signal for half-bridges A and B (open drain with internal pullup resistor), active-low ( input Output Power SLES086A − NOVEMBER 2003 − REVISED MARCH 2004 Terminal Functions DESCRIPTION DESCRIPTION TAS5121 3 ...

  • Page 4

    ... TAS5121 SLES086A − NOVEMBER 2003 − REVISED MARCH 2004 FUNCTIONAL BLOCK DIAGRAM DVDD DREG PWM_AP PWM Receiver DGND RESET DVDD DVDD DREG PWM_BP PWM Receiver DGND DREG OTW Protection SD Logic M1 OT and M2 UVP M3 4 GVDD_A OCH DREG Gate Drive Timing Control ...

  • Page 5

    ... channel Ω, AES17 filter W/channel Ω, AES17 filter W/channel Ω, AES17 filter A-weighted Ω kHz, AES17 filter A-weighted, AES17 filter kHz, −60 dB, A-weighted, AES17 filter TAS5121 MIN TYP MAX UNIT 3 3.3 3 ...

  • Page 6

    ... To optimize device performance and prevent overcurrent (OC) protection activation, the demodulation filter must be designed with special care. See Demodulation Filter Design in the Application Information section of the data sheet and consider the recommended inductors and capacitors for optimal performance also important to consider PCB design and layout for optimum performance of the TAS5121. 6 ...

  • Page 7

    ... TVS Zener GND 27 † TVS Zener GND 1 µ µH OUT_A 25 OUT_A 33 nF ‡ PCB PVDD_A 23 PVDD_A 2.7 Ω 22 BST_A 1 Ω 100 nF 21 GND 22 Ω 20 GVDD_A 19 GVDD_A 1 µF TAS5121 Gate-Drive Power Supply H-Bridge 4.7 kΩ Power Supply 1000 µF 4.7 kΩ 33 µF 7 ...

  • Page 8

    ... TAS5121 SLES086A − NOVEMBER 2003 − REVISED MARCH 2004 TOTAL HARMONIC DISTORTION + NOISE vs POWER Ω 75°C Gain = 0.1 0.01 0 − Power − W Figure 1 POWER LOSS vs TOTAL OUTPUT POWER O(Total) − Total Output Power − W ...

  • Page 9

    ... 75°C 0 0.01 0.001 100 0 −20 8 Ω −40 −60 −80 −100 4 Ω −120 −140 −160 10k 20k TAS5121 vs FREQUENCY 10k 20k f − Frequency − Hz Figure 6 AMPLITUDE vs FREQUENCY − Frequency − kHz Figure 8 9 ...

  • Page 10

    ... GVDD_x is also connected to an internal LDR that regulates the GVDD_x voltage down to the logic power supply, 3.3 V, for the TAS5121 internal logic blocks. Each GVDD_x pin is decoupled to system ground by a 1-µF capacitor. PVDD_x is the H-bridge power supply. Two power pins are provided for each half-bridge due to the high current density ...

  • Page 11

    ... MOSFETs to ensure that both devices in each half-bridge are not conducting simultaneously. POWERING DOWN For power down of the TAS5121, an opposite approach is necessary. The RESET must be asserted LOW before the valid PWM signal is removed. PRECAUTION The TAS5121 must always start up in the high-impedance (Hi-Z) state ...

  • Page 12

    ... RESET. PROTECTION MODE Autorecovery (AR) After Errors (PMODE0) In autorecovery mode (PMODE0) the TAS5121 is self-supported in handling of error situations. All protection systems are active, setting the output stage in the high-impedance state to protect the output stage and connected equipment ...

  • Page 13

    ... The rule is that the inductance should remain stable within the range of peak current seen at maximum output power and deliver approximately 5 µH of inductance this rule is observed, the TAS5121 should not have distortion issues due to the output inductors. This prevents device damage due to overcurrent conditions because of inductor saturation in the output filter ...

  • Page 14

    ... The following table indicates modeled parameters for one TAS5121 heatsink. The junction temperature is set at 110°C while delivering 70 W RMS into 4-Ω loads with no clipping assumed that the thermal grease is about 0.001 inch thick (this is critical). ...

  • Page 15

    ... TAS5121DKD ACTIVE TAS5121DKDE4 ACTIVE TAS5121DKDR ACTIVE TAS5121DKDRE4 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 16

    ... TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Type Drawing TAS5121DKDR HSSOP DKD PACKAGE MATERIALS INFORMATION Pins SPQ Reel Reel A0 (mm) Diameter Width (mm) W1 (mm) 36 500 330.0 24.4 14.7 Pack Materials-Page 1 10-Jul-2009 B0 (mm) K0 (mm Pin1 (mm) (mm) Quadrant 16 ...

  • Page 17

    ... Device Package Type TAS5121DKDR HSSOP PACKAGE MATERIALS INFORMATION Package Drawing Pins SPQ Length (mm) DKD 36 500 Pack Materials-Page 2 10-Jul-2009 Width (mm) Height (mm) 337.0 343.0 41.0 ...

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  • Page 21

    ... 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’ ...