JAJSCJ5B September   2016  – October 2017 TAS6424-Q1

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     PCB領域
  4. 4 改訂履歴
  5. 5 概要（続き）
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and Functions
    1.     Pin Functions
  8. 8 Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Timing Requirements
    7. 8.7 Typical Characteristics
  9. 9 Parameter measurement Information
  10. 10Detailed description
    1. 10.1 Overview
    2. 10.2 Functional Block Diagram
    3. 10.3 Feature Description
      1. 10.3.1  Serial Audio Port
        1. 10.3.1.1 I2S Mode
        2. 10.3.1.2 Left-Justified Timing
        3. 10.3.1.3 Right-Justified Timing
        4. 10.3.1.4 TDM Mode
        5. 10.3.1.5 Supported Clock Rates
        6. 10.3.1.6 Audio-Clock Error Handling
      2. 10.3.2  High-Pass Filter
      3. 10.3.3  Volume Control and Gain
      4. 10.3.4  High-Frequency Pulse-Width Modulator (PWM)
      5. 10.3.5  Gate Drive
      6. 10.3.6  Power FETs
      7. 10.3.7  Load Diagnostics
        1. 10.3.7.1 DC Load Diagnostics
        2. 10.3.7.2 Line Output Diagnostics
        3. 10.3.7.3 AC Load Diagnostics
      8. 10.3.8  Protection and Monitoring
        1. 10.3.8.1 Overcurrent Limit (ILIMIT)
        2. 10.3.8.2 Overcurrent Shutdown (ISD)
        3. 10.3.8.3 DC Detect
        4. 10.3.8.4 Clip Detect
        5. 10.3.8.5 Global Overtemperature Warning (OTW), Overtemperature Shutdown (OTSD)
        6. 10.3.8.6 Channel Overtemperature Warning [OTW(i)] and Shutdown [OTSD(i)]
        7. 10.3.8.7 Undervoltage (UV) and Power-On-Reset (POR)
        8. 10.3.8.8 Overvoltage (OV) and Load Dump
      9. 10.3.9  Power Supply
        1. 10.3.9.1 Vehicle-Battery Power-Supply Sequence
        2. 10.3.9.2 Boosted Power-Supply Sequence
      10. 10.3.10 Hardware Control Pins
        1. 10.3.10.1 FAULT
        2. 10.3.10.2 WARN
        3. 10.3.10.3 MUTE
        4. 10.3.10.4 STANDBY
    4. 10.4 Device Functional Modes
      1. 10.4.1 Operating Modes and Faults
    5. 10.5 Programming
      1. 10.5.1 I2C Serial Communication Bus
      2. 10.5.2 I2C Bus Protocol
      3. 10.5.3 Random Write
      4. 10.5.4 Sequential Write
      5. 10.5.5 Random Read
      6. 10.5.6 Sequential Read
    6. 10.6 Register Maps
      1. 10.6.1  Mode Control Register (address = 0x00) [default = 0x00]
        1. Table 10. Mode Control Field Descriptions
      2. 10.6.2  Miscellaneous Control 1 Register (address = 0x01) [default = 0x32]
        1. Table 11. Misc Control 1 Field Descriptions
      3. 10.6.3  Miscellaneous Control 2 Register (address = 0x02) [default = 0x62]
        1. Table 12. Misc Control 2 Field Descriptions
      4. 10.6.4  SAP Control (Serial Audio-Port Control) Register (address = 0x03) [default = 0x04]
        1. Table 13. SAP Control Field Descriptions
      5. 10.6.5  Channel State Control Register (address = 0x04) [default = 0x55]
        1. Table 14. Channel State Control Field Descriptions
      6. 10.6.6  Channel 1 Through 4 Volume Control Registers (address = 0x05–0x088) [default = 0xCF]
        1. Table 15. Ch x Volume Control Field Descriptions
      7. 10.6.7  DC Load Diagnostic Control 1 Register (address = 0x09) [default = 0x00]
        1. Table 16. DC Load Diagnostics Control 1 Field Descriptions
      8. 10.6.8  DC Load Diagnostic Control 2 Register (address = 0x0A) [default = 0x11]
        1. Table 17. DC Load Diagnostics Control 2 Field Descriptions
      9. 10.6.9  DC Load Diagnostic Control 3 Register (address = 0x0B) [default = 0x11]
        1. Table 18. DC Load Diagnostics Control 3 Field Descriptions
      10. 10.6.10 DC Load Diagnostic Report 1 Register (address = 0x0C) [default = 0x00]
        1. Table 19. DC Load Diagnostics Report 1 Field Descriptions
      11. 10.6.11 DC Load Diagnostic Report 2 Register (address = 0x0D) [default = 0x00]
        1. Table 20. DC Load Diagnostics Report 2 Field Descriptions
      12. 10.6.12 DC Load Diagnostics Report 3—Line Output—Register (address = 0x0E) [default = 0x00]
        1. Table 21. DC Load Diagnostics Report 3—Line Output—Field Descriptions
      13. 10.6.13 Channel State Reporting Register (address = 0x0F) [default = 0x55]
        1. Table 22. State-Reporting Field Descriptions
      14. 10.6.14 Channel Faults (Overcurrent, DC Detection) Register (address = 0x10) [default = 0x00]
        1. Table 23. Channel Faults Field Descriptions
      15. 10.6.15 Global Faults 1 Register (address = 0x11) [default = 0x00]
        1. Table 24. Global Faults 1 Field Descriptions
      16. 10.6.16 Global Faults 2 Register (address = 0x12) [default = 0x00]
        1. Table 25. Global Faults 2 Field Descriptions
      17. 10.6.17 Warnings Register (address = 0x13) [default = 0x20]
        1. Table 26. Warnings Field Descriptions
      18. 10.6.18 Pin Control Register (address = 0x14) [default = 0xFF]
        1. Table 27. Pin Control Field Descriptions
      19. 10.6.19 AC Load Diagnostic Control 1 Register (address = 0x15) [default = 0x00]
        1. Table 28. AC Load Diagnostic Control 1 Field Descriptions
      20. 10.6.20 AC Load Diagnostic Control 2 Register (address = 0x16) [default = 0x00]
        1. Table 29. AC Load Diagnostic Control 2 Field Descriptions
      21. 10.6.21 AC Load Diagnostic Impedance Report Ch1 through CH4 Registers (address = 0x17–0x1A) [default = 0x00]
        1. Table 30. Chx AC LDG Impedance Report Field Descriptions
      22. 10.6.22 AC Load Diagnostic Phase Report High Register (address = 0x1B) [default = 0x00]
        1. Table 31. AC LDG Phase High Report Field Descriptions
      23. 10.6.23 AC Load Diagnostic Phase Report Low Register (address = 0x1C) [default = 0x00]
        1. Table 32. AC LDG Phase Low Report Field Descriptions
      24. 10.6.24 AC Load Diagnostic STI Report High Register (address = 0x1D) [default = 0x00]
        1. Table 33. AC LDG STI High Report Field Descriptions
      25. 10.6.25 AC Load Diagnostic STI Report Low Register (address = 0x1C) [default = 0x00]
        1. Table 34. Chx AC LDG STI Low Report Field Descriptions
      26. 10.6.26 Miscellaneous Control 3 Register (address = 0x21) [default = 0x00]
        1. Table 35. Misc Control 3 Field Descriptions
      27. 10.6.27 Clip Control Register (address = 0x22) [default = 0x01]
        1. Table 36. Clip Control Field Descriptions
      28. 10.6.28 Clip Window Register (address = 0x23) [default = 0x14]
        1. Table 37. Clip Window Field Descriptions
      29. 10.6.29 Clip Warning Register (address = 0x24) [default = 0x00]
        1. Table 38. Clip Warning Field Descriptions
      30. 10.6.30 ILIMIT Status Register (address = 0x25) [default = 0x00]
        1. Table 39. ILIMIT Status Field Descriptions
      31. 10.6.31 Miscellaneous Control 4 Register (address = 0x26) [default = 0x40]
        1. Table 40. Misc Control 4 Field Descriptions
  11. 11Application and Implementation
    1. 11.1 Application Information
      1. 11.1.1 AM-Radio Band Avoidance
      2. 11.1.2 Parallel BTL Operation (PBTL)
      3. 11.1.3 Demodulation Filter Design
      4. 11.1.4 Line Driver Applications
    2. 11.2 Typical Applications
      1. 11.2.1 BTL Application
        1. 11.2.1.1 Design Requirements
        2. 11.2.1.2 Power Supplies
        3. 11.2.1.3 Communication
        4. 11.2.1.4 Detailed Design Procedure
          1. 11.2.1.4.1 Hardware Design
          2. 11.2.1.4.2 Digital Input and the Serial Audio Port
          3. 11.2.1.4.3 Bootstrap Capacitors
          4. 11.2.1.4.4 Output Reconstruction Filter
        5. 11.2.1.5 Application Curves
      2. 11.2.2 PBTL Application
        1. 11.2.2.1 Design Requirements
          1. 11.2.2.1.1 Detailed Design Procedure
        2. 11.2.2.2 Application Curves
  12. 12Power Supply Recommendations
  13. 13Layout
    1. 13.1 Layout Guidelines
      1. 13.1.1 Electrical Connection of Thermal pad and Heat Sink
      2. 13.1.2 EMI Considerations
      3. 13.1.3 General Guidelines
    2. 13.2 Layout Example
    3. 13.3 Thermal Considerations
  14. 14デバイスおよびドキュメントのサポート
    1. 14.1 ドキュメントのサポート
      1. 14.1.1 関連資料
    2. 14.2 ドキュメントの更新通知を受け取る方法
    3. 14.3 コミュニティ・リソース
    4. 14.4 商標
    5. 14.5 静電気放電に関する注意事項
    6. 14.6 Glossary
  15. 15メカニカル、パッケージ、および注文情報

パッケージ・オプション

デバイスごとのパッケージ図は、PDF版データシートをご参照ください。

メカニカル・データ（パッケージ｜ピン）
  • DKQ|56
サーマルパッド・メカニカル・データ
発注情報

10.3.7.3 AC Load Diagnostics

The AC load diagnostic is used to determine the proper connection of a capacitively coupled speaker or tweeter when used with a passive crossover. The AC load diagnostic is controlled through I2C. The AC diagnostics requires an external input signal and reports the approximate load impedance and phase. The selected signal frequency should create current flow through the desired speaker for proper detection. If multiple channels must be tested, the diagnostics should be run in series. The AC load-diagnostic test procedure is as follows.

For load-impedance detection, use the following test procedure:

  1. Set the channels to be tested into the Hi-Z state.
  2. Set the AC_DIAGS_LOOPBACK bit (bit 7 in register 0x16) to 0.
  3. Apply a full-scale input signal from the DSP for the tested channels with the desired frequency (recommended 10 kHz to 20 kHz).

    4. NOTE

    The device ramps the signal up and down automatically to prevent pops and clicks.

  4. Set the device into the AC diagnostic mode (set bits 3:0 in register 0x15 to 1 for CH1 to CH4, set bit 3 in register 0x15 to 1, and set bit 1 in register 0x15 to 1 for PBTL12 and PBTL34).
  5. Read back the AC impedance (register 0x17 through register 0x1A).

    6. When the test is complete the channel reporting register indicates the status change from the AC diagnostic mode to the Hi-Z state. The detected impedance is stored in the appropriate I2C register.

For loopback delay detection, use the following test procedure for either BTL mode or PBTL mode:

  • BTL mode
    1. Set the AC_DIAGS_LOOPBACK bit (bit 7 in register 0x16) to 1 to enable AC loopback mode.
    2. Apply a 0-dBFS 19K signal and enable AC load diagnostics. CH1 and CH2 reuse the AC sensing loop of CH1 (set bit 3 in register 0x15 to 1). CH3, CH4 reuse the AC sensing loop of CH3 (set bit 1 in register 0x15 to 1)
    3. Read back the AC_LDG_PHASE1 value (register 0x1B and register 0x1C).

      4. When the test is complete, the channel reporting register indicates the status change from the AC diagnostic mode to the Hi-Z state. The detected impedance is stored in the appropriate I2C register.

  • PBTL mode
    1. Set the AC_DIAGS_LOOPBACK bit (bit 7 in register 0x16) to 1 to enable AC loopback mode.
    2. Set the PBTL CH12 and PBTL CH34 bits (bits 5 and 4 in register 0x00) to 0 without toggling SDz pin to enter BTL mode only for load diagnostics.
    3. Apply a 0-dBFS 19K signal and enable AC load diagnostics. For PBTL_12, enable the AC sensing loop of CH1 (set bit 3 in register 0x15 to 1). For PBTL_34, enable the AC sensing loop of CH3 (set bit 1 in register 0x15 to 1).
    4. Read back the AC_LDG_PHASE1 (register 0x1B and register 0x1C).
    5. Set the PBTL CH12 and PBTL CH34 bits (bits 5 and 4 in register 0x00) to 1 to go back to PBTL mode for load diagnostics.

Table 4. AC Impedance Code to Magnitude

SETTINGGAIN AT 19 kHzI(A)MEASUREMENT RANGE (Ω)MAPPING FROM CODE TO MAGNITUDE (Ω/Code)
Gain = 4, I = 10 mA (recommended) 4.28 0.01 12 0.05832
Gain = 4, I = 19 mA 4.28 0.019 6 0.0307
Gain = 1, I = 10 mA (recommended) 1 0.01 48 0.2496
Gain = 1, I = 19 mA 1 0.019 24 0.1314