ZHCSH28C September   2017  – May 2025 TPA3221

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Audio Characteristics (BTL)
    7. 6.7 Audio Characteristics (PBTL)
    8.     Typical Characteristics, BTL Configuration, AD-mode
    9.     Typical Characteristics, PBTL Configuration, AD-mode
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagrams
    3. 8.3 Feature Description
      1. 8.3.1 Internal LDO
        1. 8.3.1.1 Input Configuration, Gain Setting And Controller/Peripheral Operation
      2. 8.3.2 Gain Setting And Controller / Peripheral Operation
      3. 8.3.3 AD-Mode and HEAD-Mode PWM Modulation
      4. 8.3.4 Oscillator
      5. 8.3.5 Input Impedance
      6. 8.3.6 Error Reporting
    4. 8.4 Device Functional Modes
      1. 8.4.1 Powering Up
        1. 8.4.1.1 Startup Ramp Time
      2. 8.4.2 Powering Down
        1. 8.4.2.1 Power Down Ramp Time
      3. 8.4.3 Device Reset
      4. 8.4.4 Device Soft Mute
      5. 8.4.5 Device Protection System
        1. 8.4.5.1 Overload and Short Circuit Current Protection
        2. 8.4.5.2 Signal Clipping and Pulse Injector
        3. 8.4.5.3 DC Speaker Protection
        4. 8.4.5.4 Pin-to-Pin Short Circuit Protection (PPSC)
        5. 8.4.5.5 Overtemperature Protection OTW and OTE
        6. 8.4.5.6 Undervoltage Protection (UVP) and Power-on Reset (POR)
        7. 8.4.5.7 Fault Handling
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Stereo BTL Application
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedures
          1. 9.2.1.2.1 Decoupling Capacitor Recommendations
          2. 9.2.1.2.2 PVDD Capacitor Recommendation
          3. 9.2.1.2.3 BST capacitors
          4. 9.2.1.2.4 PCB Material Recommendation
      2. 9.2.2 Typical Application, Differential (2N), AD-Mode PBTL (Outputs Paralleled before LC filter)
        1. 9.2.2.1 Design Requirements
      3. 9.2.3 Typical Application, Differential (2N), AD-Mode PBTL (Outputs Paralleled after LC filter)
        1. 9.2.3.1 Design Requirements
    3. 9.3 Power Supply Recommendations
      1. 9.3.1 Power Supplies
        1. 9.3.1.1 VDD Supply
        2. 9.3.1.2 AVDD and GVDD Supplies
        3. 9.3.1.3 PVDD Supply
        4. 9.3.1.4 BST Supply
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Examples
        1. 9.4.2.1 BTL Application Printed Circuit Board Layout Example
        2. 9.4.2.2 PBTL (Outputs Paralleled before LC filter) Application Printed Circuit Board Layout Example
        3. 9.4.2.3 PBTL (Outputs Paralleled after LC filter) Application Printed Circuit Board Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Community Resources
    4. 10.4 Trademarks
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

3 说明

TPA3221 是一款可在全功率、空闲和待机状态下实现高效运行的大功率 D 类放大器。该器件具有高达 100kHz 带宽的闭环反馈，从而在音频频带内实现低失真并提供出色的音质。该器件以 AD 或低空闲电流 HEAD（高效 AD 模式）调制运行，最多可为 4Ω 负载提供 2 x 105W 的峰值功率，或为 2Ω 负载提供 1 x 208W 的峰值功率。

TPA3221 具有单端或差分模拟输入接口，最高支持 2VRMS，具有四种可选增益：18dB、24dB、30dB 和 34dB。TPA3221 还实现了大于 90% 的效率、低空闲功率 (<0.25W) 和超低待机功耗 (< 0.1W)。这是通过采用 70mΩ MOSFET、经优化的栅极驱动方案和低功耗运行模式实现的。TPA3221 内置一个 LDO，便于集成到单电源系统中。为进一步简化设计，该器件集成了重要的保护功能，包括欠压、逐周期电流限制、短路、削波检测、过热警告和关断以及直流扬声器保护。

器件信息(1)
器件型号 封装 本体尺寸（标称值） 封装尺寸(2)
TPA3221 HTSSOP (44) 14.0mm × 6.1mm 14.0mm × 8.1mm
(1) 如需了解所有可用封装，请参阅数据表末尾的可订购产品附录。
(2) 封装尺寸（长 x 宽）包括引脚（如适用）。
TPA3221 简化版原理图简化版原理图