ZHCSOO1D December   2000  – August 2021 DCR021205 , DCR022405

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 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 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Isolation
        1. 7.3.1.1 Operation or Functional Isolation
        2. 7.3.1.2 Basic or Enhanced Isolation
        3. 7.3.1.3 Working Voltage
        4. 7.3.1.4 Isolation Voltage Rating
        5. 7.3.1.5 Repeated High-Voltage Isolation Testing
      2. 7.3.2 Power Stage
      3. 7.3.3 Oscillator and Watchdog
      4. 7.3.4 ERROR Flag
      5. 7.3.5 Synchronization
      6. 7.3.6 Construction
      7. 7.3.7 Decoupling – Ripple Reduction
    4. 7.4 Device Functional Modes
      1. 7.4.1 Device Disable and Enable
      2. 7.4.2 Regulated Output Disable and Enable
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 DCR02 Single Voltage Output
      2. 8.1.2 Generating Two Positive Output Voltages
      3. 8.1.3 Generation of Dual Polarity Voltages from Two Self-Synchronized DCR02s
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Input Capacitor
        2. 8.2.2.2 Output Capacitor
        3. 8.2.2.3 Filter Capacitor
        4. 8.2.2.4 ERROR Flag
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
    3. 10.3 Thermal Consideration
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 接收文档更新通知
    3. 11.3 支持资源
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 术语表
  12. 12Mechanical, Packaging, and Orderable Information

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7.3.1.5 Repeated High-Voltage Isolation Testing

Repeated high-voltage isolation testing of a barrier component can degrade the isolation capability, depending on materials, construction, and environment. The DCR02 series of DC/DC converters have toroidal, enameled, wire isolation transformers with no additional insulation between the primary and secondary windings. While a device can be expected to withstand several times the stated test voltage, the isolation capability depends on the wire insulation. Any material, including this enamel (typically polyurethane), is susceptible to eventual chemical degradation when subject to very-high applied voltages. Therefore, strictly limit the number of high-voltage tests and repeated high-voltage isolation testing. However, if it is absolutely required, reduce the voltage by 20% from specified test voltage with a duration limit of one second per test.