JAJSD68A September   2016  – October 2016 TPA3245

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
  4. 4 改訂履歴
  5. 5 Device Comparison Table
  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  Electrical Characteristics
    6. 7.6  Audio Characteristics (BTL)
    7. 7.7  Audio Characteristics (SE)
    8. 7.8  Audio Characteristics (PBTL)
    9. 7.9  Typical Characteristics, BTL Configuration
    10. 7.10 Typical Characteristics, SE Configuration
    11. 7.11 Typical Characteristics, PBTL Configuration
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagrams
    3. 9.3 Feature Description
      1. 9.3.1 Error Reporting
    4. 9.4 Device Protection System
      1. 9.4.1 Overload and Short Circuit Current Protection
      2. 9.4.2 Signal Clipping and Pulse Injector
      3. 9.4.3 DC Speaker Protection
      4. 9.4.4 Pin-to-Pin Short Circuit Protection (PPSC)
      5. 9.4.5 Overtemperature Protection OTW and OTE
      6. 9.4.6 Undervoltage Protection (UVP) and Power-on Reset (POR)
      7. 9.4.7 Fault Handling
      8. 9.4.8 Device Reset
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Applications
      1. 10.2.1 Stereo BTL Application
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedures
          1. 10.2.1.2.1 Decoupling Capacitor Recommendations
          2. 10.2.1.2.2 PVDD Capacitor Recommendation
          3. 10.2.1.2.3 PCB Material Recommendation
          4. 10.2.1.2.4 Oscillator
      2. 10.2.2 Application Curves
      3. 10.2.3 Typical Application, Single Ended (1N) SE
        1. 10.2.3.1 Design Requirements
        2. 10.2.3.2 Detailed Design Procedures
        3. 10.2.3.3 Application Curves
      4. 10.2.4 Typical Application, Differential (2N), PBTL (Outputs Paralleled before LC filter)
        1. 10.2.4.1 Design Requirements
        2. 10.2.4.2 Detailed Design Procedures
        3. 10.2.4.3 Application Curves
      5. 10.2.5 Typical Application, Differential (2N), PBTL (Outputs Paralleled after LC filter)
        1. 10.2.5.1 Design Requirements
        2. 10.2.5.2 Detailed Design Procedures
  11. 11Power Supply Recommendations
    1. 11.1 Power Supplies
      1. 11.1.1 VDD Supply
      2. 11.1.2 GVDD_X Supply
      3. 11.1.3 PVDD Supply
    2. 11.2 Powering Up
    3. 11.3 Powering Down
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Examples
      1. 12.2.1 BTL Application Printed Circuit Board Layout Example
      2. 12.2.2 SE Application Printed Circuit Board Layout Example
      3. 12.2.3 PBTL (Outputs Paralleled before LC filter) Application Printed Circuit Board Layout Example
      4. 12.2.4 PBTL (Outputs Paralleled after LC filter) Application Printed Circuit Board Layout Example
  13. 13デバイスおよびドキュメントのサポート
    1. 13.1 ドキュメントのサポート
    2. 13.2 ドキュメントの更新通知を受け取る方法
    3. 13.3 コミュニティ・リソース
    4. 13.4 商標
    5. 13.5 静電気放電に関する注意事項
    6. 13.6 Glossary
  14. 14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

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

12 Layout

12.1 Layout Guidelines

  • Use an unbroken ground plane to have good low impedance and inductance return path to the power supply for power and audio signals.
  • Maintain a contiguous ground plane from the ground pins to the PCB area surrounding the device for as many of the ground pins as possible, since the ground pins are the best conductors of heat in the package.
  • PCB layout, audio performance and EMI are linked closely together.
  • Routing the audio input should be kept short and together with the accompanied audio source ground.
  • The small bypass capacitors on the PVDD lines of the DUT be placed as close the PVDD pins as possible.
  • A local ground area underneath the device is important to keep solid to minimize ground bounce.
  • Orient the passive component so that the narrow end of the passive component is facing the TPA3245 device, unless the area between two pads of a passive component is large enough to allow copper to flow in between the two pads.
  • Avoid placing other heat producing components or structures near the TPA3245 device.
  • Avoid cutting off the flow of heat from the TPA3245 device to the surrounding ground areas with traces or via strings, especially on output side of device.

Netlist for this printed circuit board is generated from the schematic in Figure 31.

12.2 Layout Examples

12.2.1 BTL Application Printed Circuit Board Layout Example

TPA3245 LayoutExampleBTL.gif
A. Note: PCB layout example shows composite layout. Dark grey: Top layer copper traces, light gray: Bottom layer copper traces. All PCB area not used for traces should be GND copper pour (transparent on example image)
B. Note T1: PVDD decoupling bulk capacitors should be as close as possible to the PVDD and GND_X pins, the heat sink sets the distance. Wide traces should be routed on the top layer with direct connection to the pins and without going through vias. No vias or traces should be blocking the current path.
C. Note T2: Close decoupling of PVDD with low impedance X7R ceramic capacitors is placed under the heat sink and close to the pins.
D. Note T3: Heat sink needs to have a good connection to PCB ground.
Figure 31. BTL Application Printed Circuit Board - Composite

12.2.2 SE Application Printed Circuit Board Layout Example

TPA3245 LayoutExampleSE.gif
A. Note: PCB layout example shows composite layout. Dark grey: Top layer copper traces, light gray: Bottom layer copper traces. All PCB area not used for traces should be GND copper pour (transparent on example image)
B. Note T1: PVDD decoupling bulk capacitors should be as close as possible to the PVDD and GND_X pins, the heat sink sets the distance. Wide traces should be routed on the top layer with direct connection to the pins and without going through vias. No vias or traces should be blocking the current path.
C. Note T2: Close decoupling of PVDD with low impedance X7R ceramic capacitors is placed under the heat sink and close to the pins.
D. Note T3: Heat sink needs to have a good connection to PCB ground.
Figure 32. SE Application Printed Circuit Board - Composite

12.2.3 PBTL (Outputs Paralleled before LC filter) Application Printed Circuit Board Layout Example

TPA3245 LayoutExamplePrePBTL.gif
A. Note: PCB layout example shows composite layout. Dark grey: Top layer copper traces, light gray: Bottom layer copper traces. All PCB area not used for traces should be GND copper pour (transparent on example image)
B. Note T1: PVDD decoupling bulk capacitors should be as close as possible to the PVDD and GND_X pins, the heat sink sets the distance. Wide traces should be routed on the top layer with direct connection to the pins and without going through vias. No vias or traces should be blocking the current path.
C. Note T2: Close decoupling of PVDD with low impedance X7R ceramic capacitors is placed under the heat sink and close to the pins.
D. ote T3: Heat sink needs to have a good connection to PCB ground.
Figure 33. PBTL (Outputs Paralleled before LC filter) Application Printed Circuit Board - Composite

12.2.4 PBTL (Outputs Paralleled after LC filter) Application Printed Circuit Board Layout Example

TPA3245 LayoutExamplePBTL.gif
A. Note: PCB layout example shows composite layout. Dark grey: Top layer copper traces, light gray: Bottom layer copper traces. All PCB area not used for traces should be GND copper pour (transparent on example image)
B. Note T1: PVDD decoupling bulk capacitors should be as close as possible to the PVDD and GND_X pins, the heat sink sets the distance. Wide traces should be routed on the top layer with direct connection to the pins and without going through vias. No vias or traces should be blocking the current path.
C. Note T2: Close decoupling of PVDD with low impedance X7R ceramic capacitors is placed under the heat sink and close to the pins.
D. ote T3: Heat sink needs to have a good connection to PCB ground.
Figure 34. PBTL (Outputs Paralleled after LC filter) Application Printed Circuit Board - Composite