ZHCS339E August   2010  – June 2019 AFE031

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
  4. 4 修订历史记录
  5. 5 说明（续）
  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  Thermal Information
    4. 8.4  Electrical Characteristics: Transmitter (Tx)
    5. 8.5  Electrical Characteristics: Power Amplifier (PA)
    6. 8.6  Electrical Characteristics: Receiver (Rx)
    7. 8.7  Electrical Characteristics: Digital
    8. 8.8  Electrical Characteristics: Two-Wire Interface
    9. 8.9  Electrical Characteristics: Internal Bias Generator
    10. 8.10 Electrical Characteristics: Power Supply
    11. 8.11 Timing Requirements
    12. 8.12 Timing Diagrams
    13. 8.13 Typical Characteristics
  9. 9 Detailed Description
    1. 9.1 Functional Block Diagram
    2. 9.2 Feature Description
      1. 9.2.1 PA Block
      2. 9.2.2 Tx Block
      3. 9.2.3 Rx Block
      4. 9.2.4 DAC Block
      5. 9.2.5 REF1 and REF2 Blocks
      6. 9.2.6 Zero Crossing Detector Block
      7. 9.2.7 ETx and ERx Blocks
    3. 9.3 Power Supplies
    4. 9.4 Pin Descriptions
      1. 9.4.1 Current Overload
      2. 9.4.2 Thermal Overload
    5. 9.5 Calibration Modes
      1. 9.5.1 Tx Calibration Mode
      2. 9.5.2 Rx Calibration Mode
    6. 9.6 Serial Interface
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Detailed Design Procedure
        1. 10.2.1.1 Line-Coupling Circuit
        2. 10.2.1.2 Circuit Protection
        3. 10.2.1.3 Thermal Considerations
  11. 11器件和文档支持
    1. 11.1 器件支持
      1. 11.1.1 第三方产品免责声明
      2. 11.1.2 开发支持
        1. 11.1.2.1 电力线通信开发者套件
        2. 11.1.2.2 TINA-TI™（免费软件下载）
        3. 11.1.2.3 TI 高精度设计
        4. 11.1.2.4 WEBENCH滤波器设计器
    2. 11.2 文档支持
      1. 11.2.1 相关文档
    3. 11.3 接收文档更新通知
    4. 11.4 社区资源
    5. 11.5 商标
    6. 11.6 静电放电警告
    7. 11.7 Glossary
  12. 12机械、封装和可订购信息

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

10.2.1.2 Circuit Protection

Powerline communications are often located in operating environments that are harsh for electrical components connected to the ac line. Noise or surges from electrical anomalies such as lightning, capacitor bank switching, inductive switching, or other grid fault conditions can damage high-performance integrated circuits if they are not properly protected. The AFE031 can survive even the harshest conditions if several recommendations are followed.

First, dissipate as much of the electrical disturbance before it reaches the AFE031 with a multi-layer approach using metal-oxide varistors (MOVs), transient voltage suppression diodes (TVSs), Schottky diodes, and a Zener diode. Figure 50 shows the recommended strategy for transient overvoltage protection.

AFE031 ai_line_transient_protect_boa130.gifFigure 50. Transient Overvoltage Protection for AFE031

Note that the high-voltage coupling capacitor must be able to withstand pulses up to the clamping protection provided by the MOV. A metalized polypropylene capacitor, such as the 474MKP275KA from Illinois Capacitor, Inc., is rated for 50 Hz to 60 Hz, 250 VAC to 310 VAC, and can withstand 24 impulses of 2.5 kV.

Table 20 lists several recommended transient protection components.

Table 20. Recommended Transient Protection Devices

120 VAC, 60 Hz
COMPONENT DESCRIPTION MANUFACTURER MFR PART NO (OR EQUIVALENT)
D1 Zener diode Diodes, Inc. 1SMB59xxB(1)
D2, D3 Schottky diode Diodes, Inc. 1N5819HW
TVS Transient voltage suppressor Diodec Semiconductor P6SMBJxxC(2)
MOV Varistor LittleFuse TMOV20RP140E
HV Cap High-voltage capacitor Illinois Capacitor, Inc 474MKP275KA(3)
240 VAC, 50 Hz
COMPONENT DESCRIPTION MANUFACTURER MFR PART NO (OR EQUIVALENT)
D1 Zener diode Diodes, Inc. 1SMB59xxB(1)
D2, D3 Schottky diode Diodes, Inc. 1N5819HW
TVS Transient voltage suppressor Diodec Semiconductor P6SMBJxxC(2)
MOV Varistor LittleFuse TMOV20RP300E
HV Cap High-voltage capacitor Illinois Capacitor, Inc 474MKP275KA(3)
(1) Select the Zener breakdown voltage at the lowest available rating beyond the normal power-supply operating range.
(2) Select the TVS breakdown voltage at or slightly greater than (0.5 ● PA_VS).
(3) A common value for the high-voltage capacitor is 470 nF. Other values may be substituted depending on the requirements of the application. Note that when making a substitution, it is important in terms of reliability that the capacitor be selected from the same familiy or equivalent family of capacitors rated to withstand high-voltage surges.