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

5.4 Safe Operating Area (SOA) Curve

The SOA curve in Figure 4-3 provide guidance on the temperature boundaries within an operating system by incorporating the thermal resistance and system power loss. This curve outlines the board and case temperatures required for a given load current. The area under the curve dictates the safe operating area. This curve is based on measurements made on a PCB design with dimensions of 4in (W) × 3.5in (L) × 0.062in (H) and 6 copper layers of 2oz copper thickness.