SLPS598E May   2017  – June 2024 CSD88584Q5DC

PRODUCTION DATA  

  1.   1
  2. 1Features
  3. 2Applications
  4. 3Description
  5. 4Specifications
    1. 4.1 Absolute Maximum Ratings
    2. 4.2 Recommended Operating Conditions
    3. 4.3 Power Block Performance
    4. 4.4 Thermal Information
    5. 4.5 Electrical Characteristics
    6. 4.6 Typical Power Block Device Characteristics
    7. 4.7 Typical Power Block MOSFET Characteristics
  6. 5Application and Implementation
    1. 5.1 Application Information
    2. 5.2 Brushless DC Motor With Trapezoidal Control
    3. 5.3 Power Loss Curves
    4. 5.4 Safe Operating Area (SOA) Curve
    5. 5.5 Normalized Power Loss Curves
    6. 5.6 Design Example – Regulate Current to Maintain Safe Operation
    7. 5.7 Design Example – Regulate Board and Case Temperature to Maintain Safe Operation
      1. 5.7.1 Operating Conditions
      2. 5.7.2 Calculating Power Loss
      3. 5.7.3 Calculating SOA Adjustments
  7. 6Layout
    1. 6.1 Layout Guidelines
      1. 6.1.1 Electrical Performance
      2. 6.1.2 Thermal Considerations
    2. 6.2 Layout Example
  8. 7Device and Documentation Support
    1. 7.1 Receiving Notification of Documentation Updates
    2. 7.2 Support Resources
    3. 7.3 Trademarks
    4. 7.4 Electrostatic Discharge Caution
    5. 7.5 Glossary
  9. 8Revision History
  10. 9Mechanical, Packaging, and Orderable Information

5.5 Normalized Power Loss Curves

The normalized curves in the CSD88584Q5DC data sheet provide guidance on the power loss and SOA adjustments based on application specific needs. These curves show how the power loss and SOA temperature boundaries will adjust for different operation conditions. The primary Y-axis is the normalized change in power loss while the secondary Y-axis is the change in system temperature required in order to comply with the SOA curve. The change in power loss is a multiplier for the typical power loss. The change in SOA temperature is subtracted from the SOA curve.