SBOSA37A November   2020  – March 2023 ALM2403-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  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 Overtemperature and Shutdown Pin (OTF/SH_DN)
      2. 7.3.2 Thermal Shutdown
      3. 7.3.3 Current-Limit and Short-Circuit Protection
      4. 7.3.4 Input Common-Mode Range
      5. 7.3.5 Reverse Body Diodes in Output-Stage Transistors
      6. 7.3.6 EMI Filtering
    4. 7.4 Device Functional Modes
      1. 7.4.1 Open-Loop and Closed-Loop Operation
      2. 7.4.2 Shutdown
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Capacitive Load and Stability
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Resolver Excitation Amplifier Combined With MFB 2nd-Order, Low-Pass Filter
          1. 8.2.2.1.1 Filter Design
          2. 8.2.2.1.2 Short-to-Battery Protection
        2. 8.2.2.2 Power Dissipation and Thermal Reliability
          1. 8.2.2.2.1 Improving Package Thermal Performance
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  9. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  10. 10Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.3.5 Reverse Body Diodes in Output-Stage Transistors

Designed as a high-voltage, high current operational amplifier, the ALM2403-Q1 delivers robust output drive capability. A class AB output stage with common-source transistors is used to achieve full rail-to-rail output swing capability. Different load conditions change the ability of the amplifier to swing close to the rails.

Each output transistor has internal reverse diodes between drain and source that conduct if the output is forced to greater than the supply or less than ground (reverse current flow). These diodes can be used as flyback protection in inductive-load-driving applications. Limit the use of these diodes to pulsed operation in order to minimize junction temperature overheating due to (VF × IF). Internal current-limiting circuitry does not operate when current is flown in the reverse direction and the reverse diodes are active. A method to protect these reverse body diodes is shown in Section 8.2.2.1.2.