SLAS931 October   2017 TAS5634

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Audio Specification Stereo (BTL)
    6. 7.6 Audio Specifications Mono (PBTL)
    7. 7.7 Audio Specification 4 Channels (SE)
    8. 7.8 Electrical Characteristics
    9. 7.9 Typical Characteristics
      1. 7.9.1 BTL Configuration
      2. 7.9.2 PBTL Configuration
      3. 7.9.3 SE Configuration
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagrams
    3. 8.3 Feature Description
      1. 8.3.1  Closed-Loop Architecture
      2. 8.3.2  Power Supplies
        1. 8.3.2.1 BST, Bootstrap Supply
        2. 8.3.2.2 PVDD, Output Stage Power Supply
        3. 8.3.2.3 GVDD, Gate-Drive Power Supply
        4. 8.3.2.4 VDD Supply, Internal Regulators (DVDD and AVDD)
      3. 8.3.3  System Power-Up / Power-Down Sequence
        1. 8.3.3.1 Powering Up
        2. 8.3.3.2 Powering Down
      4. 8.3.4  Startup and Shutdown Ramp Sequence (C_START)
      5. 8.3.5  Device Protection System
      6. 8.3.6  Overload and Short Circuit Current Protection
      7. 8.3.7  DC Speaker Protection
      8. 8.3.8  Pin-To-Pin Short Circuit Protection (PPSC)
      9. 8.3.9  Overtemperature Protection
      10. 8.3.10 Overtemperature Warning, OTW
      11. 8.3.11 Undervoltage Protection (UVP) and Power-On Reset (POR)
      12. 8.3.12 Error Reporting
      13. 8.3.13 Fault Handling
      14. 8.3.14 System Design Consideration
    4. 8.4 Device Functional Modes
      1. 8.4.1 Stereo, Bridge-tied Load (BTL)
      2. 8.4.2 Mono, Paralleled Bridge-tied Load (PBTL)
      3. 8.4.3 4-Channel, Single-ended (SE)
      4. 8.4.4 BD Modulation
      5. 8.4.5 Device Reset
      6. 8.4.6 Unused Output Channels
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Typical BTL Application
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Pin Connections
        4. 9.2.1.4 Application Curves
      2. 9.2.2 Typical PBTL Configuration
        1. 9.2.2.1 Application Curves
      3. 9.2.3 Typical SE Configuration
        1. 9.2.3.1 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 Power Supplies
    2. 10.2 Bootstrap Supply
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 PCB Material Recommendation
      2. 11.1.2 PVDD Capacitor Recommendation
      3. 11.1.3 Decoupling Capacitor Recommendation
      4. 11.1.4 Circuit Component Requirements
      5. 11.1.5 Printed Circuit Board Requirements
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.

9.1 Application Information

These typical connection diagrams highlight the required external components and system level connections for proper operation of the device in several common use cases. Each of these configurations can be tested using the TAS5634EVM. Please contact TI through TI.com or by visiting the TI E2E Forum at www.e2e.ti.com for design assistance and join the audio amplifier discussion forum for additional information.

9.2 Typical Applications

9.2.1 Typical BTL Application

See Figure 26 for application schematic. In this application, differential PWM inputs are used with AD modulation from the PWM modulator (TAS5558). AD modulation scheme is defined as PWM(+) as opposite polarity from PWM(–).

TAS5634 TAS5634_TyppApp2xBTL_DDV.gif Figure 26. Typical Differential (2N) BTL Application

9.2.1.1 Design Requirements

For this design example, us the values shown in Table 7.

Table 7. BTL Design Requirements

PARAMETERS VALUES
PVDD Supply Voltage 12 V to 58 V
GVDD and VDD Voltage 12 V
Device Configuration AD Modulation, Differential Input
Mode Pins M3 = GND, M2 = GND, M1 = GND
INPUT_A PWM_1+
INPUT_B PWM_1-
INPUT_C PWM_2+
INPUT_D PWM_2-
PWM modulator TAS5548
Output filters Inductor: 15 μH, Capacitor: 0.68 μF
Speaker 6 Ω minimum
C_START Capacitor 330 nF
OC_ADJ Resistor 27 kΩ (14 A per channel, Cycle-by-cycle Current Limit)

9.2.1.2 Detailed Design Procedure

  • Follow the recommended component placement, layout and routing guidelines shown in the Layout Example section.
  • The most critical section of the circuit is the power supply pins, the amplifier output signals and the high frequency signals.
  • For specific application questions and support go to the TI E2E Forum at www.e2e.ti.com.

9.2.1.3 Pin Connections

  • Pin 1 - GVDD_AB - The gate-drive voltage for half-bridges A and B. Place a 0.1-μF decoupling capacitor placed near the pin.
  • Pin 2 - VDD - The supply pin for internal voltage regulators AVDD and DVDD. Place a 10-μF bulk capacitor and a 0.1-μF decoupling capacitor near the pin.
  • Pin 3 - ROC - Programming resistor for the overcurrent (OC) threshold. Place a resistor to ground. See table OC_ADJ Resistor Value for OC Threshold for the appropriate resistor value.
  • Pin 4 - RESET - Device reset. When asserted, output stage is Hi-Z and there is no PWM switching. This pin can be controlled by a switch, microcontroller or processor.
  • Pins 5 and 6 - INPUT_A and INPUT_B - Differential PWM input pair for A and B BTL channel with signals provided by a PWM modulator such as the TAS5548.
  • Pin 7 - C_START - Start-up ramp capacitor must be 330nf for BTL/PBTL or 1 μF for SE configuration.
  • Pin 8 - DVDD - Digital output supply pin is connected to 1-μF decoupling capacitor
  • Pins 9-12 - GND - Connect to board GND.
  • Pin 13 - AVDD - Analog output supply pin. Connect a 1-μF decoupling capacitor to device GND, pins 9-12.
  • Pins 14 and 15 - INPUT_C and INPUT_D - Differential PWM input pair for C and D BTL channel with signals provided by a PWM modulator such as the TAS5548.
  • Pin 16 - FAULT - Fault pin can be monitored by a microcontroller through GPIO pin. System can decide to assert reset or shutdown.
  • Pin 17 - OTW - Overtemperature warning pin can be monitored by a microcontroller through a GPIO pin. System can decide to turn on fan or lower output power.
  • Pin 18 - CLIP - Output clip indicator can be monitored by a microcontroller through a GPIO pin. System can decide to lower the volume.
  • Pins 19-21 - M1, M2, M3 - Mode pins set the input and output configurations. For this configuration M1-M3 are grounded. These mode pins must be hardware configured and set before starting device. Do not adjust while TAS5634 is operating.
  • Pin 22 - GVDD_CD - The gate-drive voltage for half-bridges C and D. Place a 0.1-μF decoupling capacitor placed near the pin.
  • Pins 23, 24, 43, 44 - BST_A, BST_B, BST_C, BST_D - Bootstrap pins for half-bridges A, B, C, and D. Connect 33 nF from this pin to corresponding output pins.
  • Pins 25, 26, 33, 34, 41, 42 - GND - Connect to board ground and decoupling capacitors connected to PVDD_X.
  • Pins 27, 28, 32, 35, 39, 40 - OUT_A, OUT_B, OUT_C, OUT_D - Output pins from half-bridges A, B, C, and D. Connect bootstrap capacitors and differential LC filter.
  • Pins 29, 30, 31, 36, 37, 38 - PVDD_AB, PVDD_CD - Power supply pins to half-bridges A, B, C, and D. A and B form a full-bridge and C and D form another full-bridge. A 470-μF bulk capacitor is recommended for each full-bridge power pins. Place one 1-μF decoupling capacitor next to each pin.

9.2.1.4 Application Curves

TAS5634 D001_SLAS931.gif
Figure 27. Total Harmonic Distortion + Noise vs Output Power
TAS5634 D003_SLAS931.gif
Figure 28. Output Power vs Supply Voltage

9.2.2 Typical PBTL Configuration

Use the sectionDetailed Design Procedure in the Typical BTL Application section for a pin description and setup.

TAS5634 TAS5634_TyppApp1xPBTL_DDV.gif Figure 29. Typical Differential (2N) PBTL Application

Table 8. PBTL Design Requirements

PARAMETERS VALUES
PVDD Supply Voltage 12 V to 58 V
GVDD and VDD Voltage 12 V
Device Configuration AD Modulation, Differential Input
Mode Pins M3 = DVDD, M2 = GND, M1 = GND
INPUT_A PWM_A+
INPUT_B PWM_A-
INPUT_C GND
INPUT_D GND
PWM modulator TAS5548
Output filters Inductor: 15 μH, Capacitor: 0.68 μF
Speaker 3 Ω minimum
C_START Capacitor 330 nF
OC_ADJ Resistor 27 kΩ (14 A per channel, Cycle-by-cycle Current Limit)

9.2.2.1 Application Curves

TAS5634 D014_SLAS931.gif
Figure 30. Total Harmonic Distortion + Noise vs Output Power
TAS5634 D016_SLAS931.gif
Figure 31. Output Power vs Supply Voltage

9.2.3 Typical SE Configuration

See Figure 32 for application schematic. In this application, four single-ended PWM inputs are used with AD modulation from the PWM modulator such as the TAS5558. AD modulation scheme is defined as PWM(+) is opposite polarity from PWM(–), but in this case there is only a single-ended signal. The single-ended (SE) output configuration is often used to drive four independent channels in one TAS5634 device.

TAS5634 TAS5634_TyppApp4xSE_DDV.gif Figure 32. Typical (1N) SE Application

Table 9. SE Design Requirements

PARAMETERS VALUES
PVDD Supply Voltage 12 V to 58 V
GVDD and VDD Voltage 12 V
Device Configuration AD Modulation, Single-Ended Input
Mode Pins M3 = DVDD, M2 = GND, M1 = DVDD
INPUT_A PWM_1
INPUT_B PWM_2
INPUT_C PWM_3
INPUT_D PWM_4
PWM modulator TAS5548
Output filters Inductor: 15 μH, Capacitor: 0.68 μF
Speaker 3 Ω minimum
C_START Capacitor 1 μF
OC_ADJ Resistor 27 kΩ (14 A per channel, Cycle-by-cycle Current Limit)

9.2.3.1 Application Curves

TAS5634 D009_SLAS931.gif
Figure 33. Total Harmonic Distortion + Noise vs Output Power
TAS5634 D011_SLAS931.gif
Figure 34. Output Power vs Supply Voltage